utilities library

Classes

Abortable: An HTTP request that can be aborted before it completes.
AbortableMultipartRequest: A MultipartRequest which supports abortion using abortTrigger.
AbortableRequest: A Request which supports abortion using abortTrigger.
AbortableStreamedRequest: A StreamedRequest which supports abortion using abortTrigger.
AboutDialog: An about box. This is a dialog box with the application's icon, name, version number, and copyright, plus a button to show licenses for software used by the application.
AboutListTile: A ListTile that shows an about box.
AbsorbPointer: A widget that absorbs pointers during hit testing.
AbstractLayoutBuilder<LayoutInfoType>: An abstract superclass for widgets that defer their building until layout.
AbstractNode: Deprecated; unused by the framework and will be removed in a future version of Flutter.
AcceptorKeyTags: E3 — card acceptor details, settlement accounts and terminal settings.
AccessibilityFeatures: Additional accessibility features that may be enabled by the platform.
Accumulator: Mutable wrapper of an integer that can be passed by reference to track a value across a recursive stack.
Action<T extends Intent>: Base class for an action or command to be performed.
ActionChip: A Material Design action chip.
ActionDispatcher: An action dispatcher that invokes the actions given to it.
ActionIconTheme: An inherited widget that overrides the default icon of BackButtonIcon, CloseButtonIcon, DrawerButtonIcon, and EndDrawerButtonIcon in this widget's subtree.
ActionIconThemeData: A ActionIconThemeData that overrides the default icons of BackButton, CloseButton, DrawerButton, and EndDrawerButton with ActionIconTheme.of or the overall Theme's ThemeData.actionIconTheme.
ActionListener: A helper widget for making sure that listeners on an action are removed properly.
Actions: A widget that maps Intents to Actions to be used by its descendants when invoking an Action.
ActivateAction: An Action that activates the currently focused control.
ActivateIntent: An Intent that activates the currently focused control.
Adaptation<T>: Defines a customized theme for components with an adaptive factory constructor.
AdaptiveTextSelectionToolbar: The default context menu for text selection for the current platform.
AggregatedTimedBlock: Aggregates multiple TimedBlock objects that share a name.
AggregatedTimings: Provides aggregated results for timings collected by FlutterTimeline.
AlertDialog: A Material Design alert dialog.
Align: A widget that aligns its child within itself and optionally sizes itself based on the child's size.
Alignment: A point within a rectangle.
AlignmentDirectional: An offset that's expressed as a fraction of a Size, but whose horizontal component is dependent on the writing direction.
AlignmentGeometry: Base class for Alignment that allows for text-direction aware resolution.
AlignmentGeometryTween: An interpolation between two AlignmentGeometry.
AlignmentTween: An interpolation between two alignments.
AlignTransition: Animated version of an Align that animates its Align.alignment property.
AlwaysScrollableScrollPhysics: Scroll physics that always lets the user scroll.
AlwaysStoppedAnimation<T>: An animation that is always stopped at a given value.
AndroidMotionEvent: A Dart version of Android's MotionEvent.
AndroidOptions: The options for the Android file picker.
AndroidPointerCoords: Position information for an Android pointer.
AndroidPointerProperties: Properties of an Android pointer.
AndroidView: Embeds an Android view in the Widget hierarchy.
AndroidViewController: Controls an Android view that is composed using a GL texture.
AndroidViewSurface: Integrates an Android view with Flutter's compositor, touch, and semantics subsystems.
Animatable<T>: An object that can produce a value of type T given an Animation<double> as input.
AnimatedAlign: Animated version of Align which automatically transitions the child's position over a given duration whenever the given alignment changes.
AnimatedBuilder: A general-purpose widget for building animations.
AnimatedContainer: Animated version of Container that gradually changes its values over a period of time.
AnimatedCrossFade: A widget that cross-fades between two given children and animates itself between their sizes.
AnimatedDefaultTextStyle: Animated version of DefaultTextStyle which automatically transitions the default text style (the text style to apply to descendant Text widgets without explicit style) over a given duration whenever the given style changes.
AnimatedFractionallySizedBox: Animated version of FractionallySizedBox which automatically transitions the child's size over a given duration whenever the given widthFactor or heightFactor changes, as well as the position whenever the given alignment changes.
AnimatedGrid: A scrolling container that animates items when they are inserted into or removed from a grid. in a grid.
AnimatedGridState: The State for an AnimatedGrid that animates items when they are inserted or removed.
AnimatedIcon: Shows an animated icon at a given animation progress.
AnimatedIconData: Vector graphics data for icons used by AnimatedIcon.
AnimatedIcons: Identifier for the supported Material Design animated icons.
AnimatedList: A scrolling container that animates items when they are inserted or removed.
AnimatedListState: The AnimatedListState for AnimatedList, a scrolling list container that animates items when they are inserted or removed.
AnimatedModalBarrier: A widget that prevents the user from interacting with widgets behind itself, and can be configured with an animated color value.
AnimatedOpacity: Animated version of Opacity which automatically transitions the child's opacity over a given duration whenever the given opacity changes.
AnimatedPadding: Animated version of Padding which automatically transitions the indentation over a given duration whenever the given inset changes.
AnimatedPhysicalModel: Animated version of PhysicalModel.
AnimatedPositioned: Animated version of Positioned which automatically transitions the child's position over a given duration whenever the given position changes.
AnimatedPositionedDirectional: Animated version of PositionedDirectional which automatically transitions the child's position over a given duration whenever the given position changes.
AnimatedRotation: Animated version of Transform.rotate which automatically transitions the child's rotation over a given duration whenever the given rotation changes.
AnimatedScale: Animated version of Transform.scale which automatically transitions the child's scale over a given duration whenever the given scale changes.
AnimatedSize: Animated widget that automatically transitions its size over a given duration whenever the given child's size changes.
AnimatedSlide: Widget which automatically transitions the child's offset relative to its normal position whenever the given offset changes.
AnimatedSwitcher: A widget that by default does a cross-fade between a new widget and the widget previously set on the AnimatedSwitcher as a child.
AnimatedTheme: Animated version of Theme which automatically transitions the colors, etc, over a given duration whenever the given theme changes.
AnimatedWidget: A widget that rebuilds when the given Listenable changes value.
AnimatedWidgetBaseState<T extends ImplicitlyAnimatedWidget>: A base class for widgets with implicit animations that need to rebuild their widget tree as the animation runs.
Animation<T>: A value which might change over time, moving forward or backward.
AnimationController: A controller for an animation.
AnimationMax<T extends num>: An animation that tracks the maximum of two other animations.
AnimationMean: An animation of doubles that tracks the mean of two other animations.
AnimationMin<T extends num>: An animation that tracks the minimum of two other animations.
AnimationStyle: Used to override the default parameters of an animation.
AnnotatedRegion<T extends Object>: Annotates a region of the layer tree with a value.
AnnotatedRegionLayer<T extends Object>: A composited layer which annotates its children with a value. Pushing this layer to the tree is the common way of adding an annotation.
AnnotationEntry<T>: Information collected for an annotation that is found in the layer tree.
AnnotationResult<T>: Information collected about a list of annotations that are found in the layer tree.
AnnounceSemanticsEvent: An event for a semantic announcement.
AppBar: A Material Design app bar.
AppBarTheme: Defines default property values for descendant AppBar widgets.
AppBarThemeData: Defines default property values for descendant AppBar widgets.
AppKitView: Widget that contains a macOS AppKit view.
AppKitViewController: Controller for a macOS platform view.
ApplicationSwitcherDescription: Specifies a description of the application that is pertinent to the embedder's application switcher (also known as "recent tasks") user interface.
AppLifecycleListener: A listener that can be used to listen to changes in the application lifecycle.
AppLocalizations: Callers can lookup localized strings with an instance of AppLocalizations returned by AppLocalizations.of(context).
AsciiCodec: Encoding and decoding of ASCII characters.
AsciiDecoder: Converts ASCII bytes to string.
AsciiEncoder: Converts strings of only ASCII characters to bytes.
AsciiHexInterpreter: Binary data written as two ASCII hex characters per byte.
AsciiInterpreter: Characters in the host charset (Windows-1256), one byte per character.
AsciiPrefixer: Length as ASCII digits: LL, LLL, LLLL.
AsciiValuePackager: Characters in the host charset (Windows-1256).
AspectRatio: A widget that attempts to size the child to a specific aspect ratio.
AssetBundle: A collection of resources used by the application.
AssetBundleImageKey: Key for the image obtained by an AssetImage or ExactAssetImage.
AssetBundleImageProvider: A subclass of ImageProvider that knows about AssetBundles.
AssetImage: Fetches an image from an AssetBundle, having determined the exact image to use based on the context.
AssetLottie
AssetManifest: Contains details about available assets and their variants. See Resolution-aware image assets to learn about asset variants and how to declare them.
AssetMetadata: Contains information about an asset.
AssetTileProvider: Fetch tiles from the app's shipped assets, where the tile URL is a path within the asset store
AsyncCache<T>: Runs asynchronous functions and caches the result for a period of time.
AsyncMemoizer<T>: A class for running an asynchronous function exactly once and caching its result.
AsyncSnapshot<T>: Immutable representation of the most recent interaction with an asynchronous computation.
AttributedString: A string that carries a list of StringAttributes.
AttributedStringProperty: A DiagnosticsProperty for AttributedStrings, which shows a string when there are no attributes, and more details otherwise.
Autocomplete<T extends Object>: A widget for helping the user make a selection by entering some text and choosing from among a list of options.
AutocompleteFirstOptionIntent: An Intent to highlight the first option in the autocomplete list.
AutocompleteHighlightedOption: An inherited widget used to indicate which autocomplete option should be highlighted for keyboard navigation.
AutocompleteLastOptionIntent: An Intent to highlight the last option in the autocomplete list.
AutocompleteNextOptionIntent: An Intent to highlight the next option in the autocomplete list.
AutocompleteNextPageOptionIntent: An Intent to highlight the option one page after the currently highlighted option in the autocomplete list.
AutocompletePreviousOptionIntent: An Intent to highlight the previous option in the autocomplete list.
AutocompletePreviousPageOptionIntent: An Intent to highlight the option one page before the currently highlighted option in the autocomplete list.
AutofillClient: An object that represents an autofillable input field in the autofill workflow.
AutofillConfiguration: A collection of autofill related information that represents an AutofillClient.
AutofillGroup: An AutofillScope widget that groups AutofillClients together.
AutofillGroupState: State associated with an AutofillGroup widget.
AutofillHints: A collection of commonly used autofill hint strings on different platforms.
AutofillScope: An ordered group within which AutofillClients are logically connected.
AutomaticKeepAlive: Allows subtrees to request to be kept alive in lazy lists.
AutomaticNotchedShape: A NotchedShape created from ShapeBorders.
BackButton: A Material Design back icon button.
BackButtonDispatcher: Report to a Router when the user taps the back button on platforms that support back buttons (such as Android).
BackButtonIcon: A "back" icon that's appropriate for the current TargetPlatform.
BackButtonListener: A convenience widget that registers a callback for when the back button is pressed.
BackdropFilter: A widget that applies a filter to the existing painted content and then paints child.
BackdropFilterLayer: A composited layer that applies a filter to the existing contents of the scene.
BackdropGroup: A widget that establishes a shared backdrop layer for all child BackdropFilter widgets that opt into using it.
BackdropKey: A backdrop key uniquely identifies the backdrop that a BackdropFilterLayer samples from.
BackgroundIsolateBinaryMessenger: A BinaryMessenger for use on background (non-root) isolates.
Badge: A Material Design "badge".
BadgeTheme: An inherited widget that overrides the default color style, and size parameters for Badges in this widget's subtree.
BadgeThemeData: Overrides the default properties values for descendant Badge widgets.
BallisticScrollActivity: The activity a scroll view performs after being set into motion.
Banner: Displays a diagonal message above the corner of another widget.
BannerPainter: Paints a Banner.
Base64Codec: A base64 encoder and decoder.
Base64Decoder: Decoder for base64 encoded data.
Base64Encoder: Base64 and base64url encoding converter.
BaseClient: The abstract base class for an HTTP client.
Baseline: A widget that positions its child according to the child's baseline.
BaseOverlayImage: Display an Image on the map at a specific coordinate location, within an OverlayImageLayer
BaseRequest: The base class for HTTP requests.
BaseResponse: The base class for HTTP responses.
BaseResponseWithUrl: A BaseResponse with a url field.
BaseTapAndDragGestureRecognizer: A base class for gesture recognizers that recognize taps and movements.
BaseTapGestureRecognizer: A base class for gesture recognizers that recognize taps.
BasicMessageChannel<T>: A named channel for communicating with platform plugins using asynchronous message passing.
BcdInterpreter: Packed decimal, two digits per byte.
BcdPrefixer: Length as packed decimal: two digits per byte.
BcdValuePackager: Packed decimal, optionally F-padded on the right for odd-length values.
BeveledRectangleBorder: A rectangular border with flattened or "beveled" corners.
BinaryCodec: MessageCodec with unencoded binary messages represented using ByteData.
BinaryMessenger: A messenger which sends binary data across the Flutter platform barrier.
BinaryPrefixer: Length as raw big-endian bytes.
BinaryValuePackager: Raw bytes, untouched.
BindingBase: Base class for mixins that provide singleton services.
BitField<T extends dynamic>: A BitField over an enum (or other class whose values implement "index").
BlockSemantics: A widget that drops the semantics of all widget that were painted before it in the same semantic container.
Border: A border of a box, comprised of four sides: top, right, bottom, left.
BorderDirectional: A border of a box, comprised of four sides, the lateral sides of which flip over based on the reading direction.
BorderRadius: An immutable set of radii for each corner of a rectangle.
BorderRadiusDirectional: An immutable set of radii for each corner of a rectangle, but with the corners specified in a manner dependent on the writing direction.
BorderRadiusGeometry: Base class for BorderRadius that allows for text-direction aware resolution.
BorderRadiusTween: An interpolation between two BorderRadiuss.
BorderSide: A side of a border of a box.
BorderTween: An interpolation between two Borders.
BottomAppBar: A container that is typically used with Scaffold.bottomNavigationBar.
BottomAppBarTheme: Defines default property values for descendant BottomAppBar widgets.
BottomAppBarThemeData: Defines default property values for descendant BottomAppBar widgets.
BottomNavigationBar: A material widget that's displayed at the bottom of an app for selecting among a small number of views, typically between three and five.
BottomNavigationBarItem: An interactive button within either material's BottomNavigationBar or the iOS themed CupertinoTabBar with an icon and title.
BottomNavigationBarTheme: Applies a bottom navigation bar theme to descendant BottomNavigationBar widgets.
BottomNavigationBarThemeData: Defines default property values for descendant BottomNavigationBar widgets.
BottomSheet: A Material Design bottom sheet.
BottomSheetThemeData: Defines default property values for BottomSheet's Material.
BouncingScrollPhysics: Scroll physics for environments that allow the scroll offset to go beyond the bounds of the content, but then bounce the content back to the edge of those bounds.
BouncingScrollSimulation: An implementation of scroll physics that matches iOS.
BoxBorder: Base class for box borders that can paint as rectangles, circles, or rounded rectangles.
BoxConstraints: Immutable layout constraints for RenderBox layout.
BoxConstraintsTween: An interpolation between two BoxConstraints.
BoxDecoration: An immutable description of how to paint a box.
BoxHitTestEntry: A hit test entry used by RenderBox.
BoxHitTestResult: The result of performing a hit test on RenderBoxes.
BoxPainter: A stateful class that can paint a particular Decoration.
BoxParentData: Parent data used by RenderBox and its subclasses.
BoxScrollView: A ScrollView that uses a single child layout model.
BoxShadow: A shadow cast by a box.
BrowserContextMenu: Controls the browser's context menu on the web platform.
BuildContext: A handle to the location of a widget in the widget tree.
Builder: A stateless utility widget whose build method uses its builder callback to create the widget's child.
BuildOwner: Manager class for the widgets framework.
BuildScope: A class that determines the scope of a BuildOwner.buildScope operation.
BuiltInMapCachingProvider: Simple built-in map caching using an I/O storage mechanism, for native (non-web) platforms only
ButtonActivateIntent: An Intent that activates the currently focused button.
ButtonBar: An end-aligned row of buttons, laying out into a column if there is not enough horizontal space.
ButtonBarTheme: Applies a button bar theme to descendant ButtonBar widgets.
ButtonBarThemeData: Defines the visual properties of ButtonBar widgets.
ButtonSegment<T>: Data describing a segment of a SegmentedButton.
ButtonStyle: The visual properties that most buttons have in common.
ButtonStyleButton: The base StatefulWidget class for buttons whose style is defined by a ButtonStyle object.
ButtonTheme: Used with ButtonThemeData to configure the color and geometry of buttons.
ButtonThemeData: Used with ButtonTheme to configure the color and geometry of buttons.
ByteConversionSink: The ByteConversionSink provides an interface for converters to efficiently transmit byte data.
ByteData: A fixed-length, random-access sequence of bytes that also provides random and unaligned access to the fixed-width integers and floating point numbers represented by those bytes.
BytesBuilder: Builds a list of bytes, allowing bytes and lists of bytes to be added at the end.
BytesLoader: An interface that can be implemented to support decoding vector graphic binary assets from different byte sources.
ByteStream: A stream of chunks of bytes representing a single piece of data.
Cache: The cache for decoded SVGs.
CachedMapTileMetadata: Metadata about a tile cached with a MapCachingProvider
CachingAssetBundle: An AssetBundle that permanently caches string and structured resources that have been fetched.
CachingIterable<E>: A lazy caching version of Iterable.
CalendarDatePicker: Displays a grid of days for a given month and allows the user to select a date.
CalendarDelegate<T extends DateTime>: Controls the calendar system used in the date picker.
CallbackAction<T extends Intent>: An Action that takes a callback in order to configure it without having to create an explicit Action subclass just to call a callback.
CallbackShortcuts: A widget that binds key combinations to specific callbacks.
CameraConstraint: Describes a boundary for a MapCamera, that cannot be exceeded by movement
CameraFit: Describes a position for a MapCamera
CancelableCompleter<T>: A completer for a CancelableOperation.
CancelableOperation<T>: An asynchronous operation that can be cancelled.
Canvas: An interface for recording graphical operations.
CapturedThemes: Stores a list of captured InheritedThemes that can be wrapped around a child Widget.
Card: A Material Design card: a panel with slightly rounded corners and an elevation shadow.
CardHolderAccountInfoTags: E9 — cardholder account info, with E9.E0 accounts and E9.E1 coupons.
CardInfo: What the card reader produced.
CardTheme: Defines default property values for descendant Card widgets.
CardThemeData: Defines default property values for descendant Card widgets.
CarouselController: A controller for CarouselView.
CarouselScrollPhysics: Scroll physics used by a CarouselView.
CarouselView: A Material Design carousel widget.
CarouselViewTheme: Applies a carousel theme to descendant CarouselView widgets.
CarouselViewThemeData: Defines default property values for descendant CarouselView widgets.
Category: A category with which to annotate a class, for documentation purposes.
CatmullRomCurve: An animation easing curve that passes smoothly through the given control points using a centripetal Catmull-Rom spline.
CatmullRomSpline: A 2D spline that passes smoothly through the given control points using a centripetal Catmull-Rom spline.
Center: A widget that centers its child within itself.
CentroidCalculator: Places the Polygon.label at the centroid calculated using the signed area formula
ChangeNotifier: A class that can be extended or mixed in that provides a change notification API using VoidCallback for notifications.
ChannelBuffers: The buffering and dispatch mechanism for messages sent by plugins on the engine side to their corresponding plugin code on the framework side.
CharacterActivator: A shortcut combination that is triggered by a key event that produces a specific character.
CharacterBoundary: A TextBoundary subclass for retrieving the range of the grapheme the given position is in.
CharacterRange: A range of characters of a Characters.
Characters: The characters of a string.
Checkbox: A Material Design checkbox.
CheckboxListTile: A ListTile with a Checkbox. In other words, a checkbox with a label.
CheckboxMenuButton: A menu item that combines a Checkbox widget with a MenuItemButton.
CheckboxTheme: Applies a checkbox theme to descendant Checkbox widgets.
CheckboxThemeData: Defines default property values for descendant Checkbox widgets.
CheckedModeBanner: Displays a Banner saying "DEBUG" when running in debug mode. MaterialApp builds one of these by default.
CheckedPopupMenuItem<T>: An item with a checkmark in a Material Design popup menu.
CheckmarkableChipAttributes: An interface for Material Design chips that can have check marks.
ChildBackButtonDispatcher: A variant of BackButtonDispatcher which listens to notifications from a parent back button dispatcher, and can take priority from its parent for the handling of such notifications.
ChildLayoutHelper: A collection of static functions to layout a RenderBox child with the given set of BoxConstraints.
ChildSemanticsConfigurationsResult: The result that contains the arrangement for the child SemanticsConfigurations.
ChildSemanticsConfigurationsResultBuilder: The builder to build a ChildSemanticsConfigurationsResult based on its annotations.
ChildVicinity: The relative position of a child in a TwoDimensionalViewport in relation to other children of the viewport.
Chip: A Material Design chip.
ChipAnimationStyle: A helper class that overrides the default chip animation parameters.
ChipAttributes: An interface defining the base attributes for a Material Design chip.
ChipTheme: Applies a chip theme to descendant RawChip-based widgets, like Chip, InputChip, ChoiceChip, FilterChip, and ActionChip.
ChipThemeData: Holds the color, shape, and text styles for a Material Design chip theme.
ChoiceChip: A Material Design choice chip.
ChunkedConversionSink<T>: A ChunkedConversionSink is used to transmit data more efficiently between two converters during chunked conversions.
ChunkedStreamReader<T>: Utility class for reading elements from a chunked stream.
Circle: Circle-base GEO algorithms.
CircleAvatar: A circle that represents a user.
CircleBorder: A border that fits a circle within the available space.
CircleLayer<R extends Object>: A layer that displays a list of CircleMarker on the map
CircleMarker<R extends Object>: Immutable marker options for CircleMarker. Circle markers are a more simple and performant way to draw markers as the regular Marker
CirclePainter<R extends Object>: The CustomPainter used to draw CircleMarkers for the CircleLayer.
CircularNotchedRectangle: A rectangle with a smooth circular notch.
CircularProgressIndicator: A Material Design circular progress indicator, which spins to indicate that the application is busy.
CisKeyTags: E1 — club/CIS credit info. Shares its root with StatementKeyTags, which is merged later and therefore wins on E1.81.
ClampingScrollPhysics: Scroll physics for environments that prevent the scroll offset from reaching beyond the bounds of the content.
ClampingScrollSimulation: An implementation of scroll physics that aligns with Android.
ClearSelectionEvent: Clears the selection from the Selectable and removes any existing highlight as if there is no selection at all.
Client: The interface for HTTP clients that take care of maintaining persistent connections across multiple requests to the same server.
Clipboard: Utility methods for interacting with the system's clipboard.
ClipboardData: Data stored on the system clipboard.
ClipboardStatusNotifier: A ValueNotifier whose value indicates whether the current contents of the clipboard can be pasted.
ClipContext: Clip utilities used by PaintingContext.
ClipOval: A widget that clips its child using an oval.
ClipPath: A widget that clips its child using a path.
ClipPathLayer: A composite layer that clips its children using a path.
ClipRect: A widget that clips its child using a rectangle.
ClipRectLayer: A composite layer that clips its children using a rectangle.
ClipRRect: A widget that clips its child using a rounded rectangle.
ClipRRectLayer: A composite layer that clips its children using a rounded rectangle.
ClipRSuperellipse: A widget that clips its child using a rounded superellipse.
ClipRSuperellipseLayer: A composite layer that clips its children using a rounded superellipse.
ClosableStringSink: A ClosableStringSink extends the StringSink interface by adding a close method.
CloseButton: A Material Design close icon button.
CloseButtonIcon: A "close" icon that's appropriate for the current TargetPlatform.
Codec<S, T>: A Codec encodes and (if supported) decodes data.
Color: An immutable color value in ARGB format.
ColoredBox: A widget that paints its area with a specified Color and then draws its child on top of that color.
ColorFilter: A description of a color filter to apply when drawing a shape or compositing a layer with a particular Paint. A color filter is a function that takes two colors, and outputs one color. When applied during compositing, it is independently applied to each pixel of the layer being drawn before the entire layer is merged with the destination.
ColorFiltered: Applies a ColorFilter to its child.
ColorFilterLayer: A composite layer that applies a ColorFilter to its children.
ColorMapper: A class that transforms from one color to another during SVG parsing.
ColorProperty: DiagnosticsProperty that has an Color as value.
Colors: Color and ColorSwatch constants which represent Material design's color palette.
ColorScheme: A set of 45 colors based on the Material spec that can be used to configure the color properties of most components.
ColorSwatch<T>: A color that has a small table of related colors called a "swatch".
ColorTween: An interpolation between two colors.
Column: A widget that displays its children in a vertical array.
Completer<T>: A way to produce Future objects and to complete them later with a value or error.
ComponentElement: An Element that composes other Elements.
CompositedTransformFollower: A widget that follows a CompositedTransformTarget.
CompositedTransformTarget: A widget that can be targeted by a CompositedTransformFollower.
CompoundAnimation<T>: An interface for combining multiple Animations. Subclasses need only implement the value getter to control how the child animations are combined. Can be chained to combine more than 2 animations.
CompressionOptions: Options controlling compression in a WebSocket.
ConnectionTask<S>: A cancelable connection attempt.
ConstantTween<T>: A tween with a constant value.
ConstrainedBox: A widget that imposes additional constraints on its child.
ConstrainedLayoutBuilder<ConstraintType extends Constraints>: A specialized AbstractLayoutBuilder whose widget subtree depends on the incoming ConstraintType that will be imposed on the widget.
Constraints: An abstract set of layout constraints.
ConstraintsTransformBox: A container widget that applies an arbitrary transform to its constraints, and sizes its child using the resulting BoxConstraints, optionally clipping, or treating the overflow as an error.
ContainCamera: Constrains the edges of the camera to within bounds
ContainCameraCenter: Constrains the center coordinate of the camera to within bounds
ContainCameraLatitude: Constrains the edges of the camera to within latitudes a and b
Container: A convenience widget that combines common painting, positioning, and sizing widgets.
ContainerBoxParentData<ChildType extends RenderObject>: Abstract ParentData subclass for RenderBox subclasses that want the ContainerRenderObjectMixin.
ContainerLayer: A composited layer that has a list of children.
ContentInsertionConfiguration: Configures the ability to insert media content through the soft keyboard.
ContentType: A MIME/IANA media type used as the value of the HttpHeaders.contentTypeHeader header.
ContextAction<T extends Intent>: An abstract Action subclass that adds an optional BuildContext to the isEnabled and invoke methods to be able to provide context to actions.
ContextMenuButtonItem: The type and callback for a context menu button.
ContextMenuController: Builds and manages a context menu at a given location.
ContinuousRectangleBorder: A rectangular border with smooth continuous transitions between the straight sides and the rounded corners.
ControlsDetails: Container for all the information necessary to build a Stepper widget's forward and backward controls for any given step.
Converter<S, T>: A Converter converts data from one representation into another.
Cookie: Representation of a cookie. For cookies received by the server as Cookie header values only name and value properties will be set. When building a cookie for the 'set-cookie' header in the server and when receiving cookies in the client as 'set-cookie' headers all fields can be used.
CopySelectionTextIntent: An Intent that represents a user interaction that attempts to copy or cut the current selection in the field.
Cp1256: Windows-1256, the charset the Java CharsetSetting.DEFAULT uses for every ASCII-interpreted ISO field and TLV value. Dart ships no single-byte Arabic codec, so the table lives here.
Crs: An abstract representation of a Coordinate Reference System.
CrsSimple: Custom CRS for non geographical maps
Cubic: A cubic polynomial mapping of the unit interval.
CupertinoBasedMaterialThemeData: A class for creating a Material theme with a color scheme based off of the colors from a CupertinoThemeData. This is intended to be used only in the case when a Material widget is unable to find a Material theme in the tree, but is able to find a Cupertino theme. Most often this will occur when a Material widget is used inside of a CupertinoApp.
CupertinoLocalizationAf: The translations for Afrikaans (af).
CupertinoLocalizationAm: The translations for Amharic (am).
CupertinoLocalizationAr: The translations for Arabic (ar).
CupertinoLocalizationAs: The translations for Assamese (as).
CupertinoLocalizationAz: The translations for Azerbaijani (az).
CupertinoLocalizationBe: The translations for Belarusian (be).
CupertinoLocalizationBg: The translations for Bulgarian (bg).
CupertinoLocalizationBn: The translations for Bengali Bangla (bn).
CupertinoLocalizationBo: The translations for Tibetan (bo).
CupertinoLocalizationBs: The translations for Bosnian (bs).
CupertinoLocalizationCa: The translations for Catalan Valencian (ca).
CupertinoLocalizationCs: The translations for Czech (cs).
CupertinoLocalizationCy: The translations for Welsh (cy).
CupertinoLocalizationDa: The translations for Danish (da).
CupertinoLocalizationDe: The translations for German (de).
CupertinoLocalizationDeCh: The translations for German, as used in Switzerland (de_CH).
CupertinoLocalizationEl: The translations for Modern Greek (el).
CupertinoLocalizationEn: The translations for English (en).
CupertinoLocalizationEnAu: The translations for English, as used in Australia (en_AU).
CupertinoLocalizationEnCa: The translations for English, as used in Canada (en_CA).
CupertinoLocalizationEnGb: The translations for English, as used in the United Kingdom (en_GB).
CupertinoLocalizationEnIe: The translations for English, as used in Ireland (en_IE).
CupertinoLocalizationEnIn: The translations for English, as used in India (en_IN).
CupertinoLocalizationEnNz: The translations for English, as used in New Zealand (en_NZ).
CupertinoLocalizationEnSg: The translations for English, as used in Singapore (en_SG).
CupertinoLocalizationEnZa: The translations for English, as used in South Africa (en_ZA).
CupertinoLocalizationEs: The translations for Spanish Castilian (es).
CupertinoLocalizationEs419: The translations for Spanish Castilian, as used in Latin America and the Caribbean (es_419).
CupertinoLocalizationEsAr: The translations for Spanish Castilian, as used in Argentina (es_AR).
CupertinoLocalizationEsBo: The translations for Spanish Castilian, as used in Bolivia (es_BO).
CupertinoLocalizationEsCl: The translations for Spanish Castilian, as used in Chile (es_CL).
CupertinoLocalizationEsCo: The translations for Spanish Castilian, as used in Colombia (es_CO).
CupertinoLocalizationEsCr: The translations for Spanish Castilian, as used in Costa Rica (es_CR).
CupertinoLocalizationEsDo: The translations for Spanish Castilian, as used in the Dominican Republic (es_DO).
CupertinoLocalizationEsEc: The translations for Spanish Castilian, as used in Ecuador (es_EC).
CupertinoLocalizationEsGt: The translations for Spanish Castilian, as used in Guatemala (es_GT).
CupertinoLocalizationEsHn: The translations for Spanish Castilian, as used in Honduras (es_HN).
CupertinoLocalizationEsMx: The translations for Spanish Castilian, as used in Mexico (es_MX).
CupertinoLocalizationEsNi: The translations for Spanish Castilian, as used in Nicaragua (es_NI).
CupertinoLocalizationEsPa: The translations for Spanish Castilian, as used in Panama (es_PA).
CupertinoLocalizationEsPe: The translations for Spanish Castilian, as used in Peru (es_PE).
CupertinoLocalizationEsPr: The translations for Spanish Castilian, as used in Puerto Rico (es_PR).
CupertinoLocalizationEsPy: The translations for Spanish Castilian, as used in Paraguay (es_PY).
CupertinoLocalizationEsSv: The translations for Spanish Castilian, as used in El Salvador (es_SV).
CupertinoLocalizationEsUs: The translations for Spanish Castilian, as used in the United States (es_US).
CupertinoLocalizationEsUy: The translations for Spanish Castilian, as used in Uruguay (es_UY).
CupertinoLocalizationEsVe: The translations for Spanish Castilian, as used in Venezuela (es_VE).
CupertinoLocalizationEt: The translations for Estonian (et).
CupertinoLocalizationEu: The translations for Basque (eu).
CupertinoLocalizationFa: The translations for Persian (fa).
CupertinoLocalizationFi: The translations for Finnish (fi).
CupertinoLocalizationFil: The translations for Filipino Pilipino (fil).
CupertinoLocalizationFr: The translations for French (fr).
CupertinoLocalizationFrCa: The translations for French, as used in Canada (fr_CA).
CupertinoLocalizationGa: The translations for Irish (ga).
CupertinoLocalizationGl: The translations for Galician (gl).
CupertinoLocalizationGsw: The translations for Swiss German Alemannic Alsatian (gsw).
CupertinoLocalizationGu: The translations for Gujarati (gu).
CupertinoLocalizationHe: The translations for Hebrew (he).
CupertinoLocalizationHi: The translations for Hindi (hi).
CupertinoLocalizationHr: The translations for Croatian (hr).
CupertinoLocalizationHu: The translations for Hungarian (hu).
CupertinoLocalizationHy: The translations for Armenian (hy).
CupertinoLocalizationId: The translations for Indonesian (id).
CupertinoLocalizationIs: The translations for Icelandic (is).
CupertinoLocalizationIt: The translations for Italian (it).
CupertinoLocalizationJa: The translations for Japanese (ja).
CupertinoLocalizationKa: The translations for Georgian (ka).
CupertinoLocalizationKk: The translations for Kazakh (kk).
CupertinoLocalizationKm: The translations for Khmer Central Khmer (km).
CupertinoLocalizationKn: The translations for Kannada (kn).
CupertinoLocalizationKo: The translations for Korean (ko).
CupertinoLocalizationKy: The translations for Kirghiz Kyrgyz (ky).
CupertinoLocalizationLo: The translations for Lao (lo).
CupertinoLocalizationLt: The translations for Lithuanian (lt).
CupertinoLocalizationLv: The translations for Latvian (lv).
CupertinoLocalizationMk: The translations for Macedonian (mk).
CupertinoLocalizationMl: The translations for Malayalam (ml).
CupertinoLocalizationMn: The translations for Mongolian (mn).
CupertinoLocalizationMr: The translations for Marathi (mr).
CupertinoLocalizationMs: The translations for Malay (ms).
CupertinoLocalizationMy: The translations for Burmese (my).
CupertinoLocalizationNb: The translations for Norwegian Bokmål (nb).
CupertinoLocalizationNe: The translations for Nepali (ne).
CupertinoLocalizationNl: The translations for Dutch Flemish (nl).
CupertinoLocalizationNo: The translations for Norwegian (no).
CupertinoLocalizationOr: The translations for Oriya (or).
CupertinoLocalizationPa: The translations for Panjabi Punjabi (pa).
CupertinoLocalizationPl: The translations for Polish (pl).
CupertinoLocalizationPt: The translations for Portuguese (pt).
CupertinoLocalizationPtPt: The translations for Portuguese, as used in Portugal (pt_PT).
CupertinoLocalizationRo: The translations for Romanian Moldavian Moldovan (ro).
CupertinoLocalizationRu: The translations for Russian (ru).
CupertinoLocalizationSi: The translations for Sinhala Sinhalese (si).
CupertinoLocalizationSk: The translations for Slovak (sk).
CupertinoLocalizationSl: The translations for Slovenian (sl).
CupertinoLocalizationSq: The translations for Albanian (sq).
CupertinoLocalizationSr: The translations for Serbian (sr).
CupertinoLocalizationSrCyrl: The translations for Serbian, using the Cyrillic script (sr_Cyrl).
CupertinoLocalizationSrLatn: The translations for Serbian, using the Latin script (sr_Latn).
CupertinoLocalizationSv: The translations for Swedish (sv).
CupertinoLocalizationSw: The translations for Swahili (sw).
CupertinoLocalizationTa: The translations for Tamil (ta).
CupertinoLocalizationTe: The translations for Telugu (te).
CupertinoLocalizationTh: The translations for Thai (th).
CupertinoLocalizationTl: The translations for Tagalog (tl).
CupertinoLocalizationTr: The translations for Turkish (tr).
CupertinoLocalizationUg: The translations for Uighur Uyghur (ug).
CupertinoLocalizationUk: The translations for Ukrainian (uk).
CupertinoLocalizationUr: The translations for Urdu (ur).
CupertinoLocalizationUz: The translations for Uzbek (uz).
CupertinoLocalizationVi: The translations for Vietnamese (vi).
CupertinoLocalizationZh: The translations for Chinese (zh).
CupertinoLocalizationZhHans: The translations for Chinese, using the Han script (zh_Hans).
CupertinoLocalizationZhHant: The translations for Chinese, using the Han script (zh_Hant).
CupertinoLocalizationZhHantHk: The translations for Chinese, as used in Hong Kong, using the Han script (zh_Hant_HK).
CupertinoLocalizationZhHantTw: The translations for Chinese, as used in Taiwan, using the Han script (zh_Hant_TW).
CupertinoLocalizationZu: The translations for Zulu (zu).
CursorKeyboardRotationOptions: Options to configure cursor/keyboard rotation
Curve: An parametric animation easing curve, i.e. a mapping of the unit interval to the unit interval.
Curve2D: Abstract class that defines an API for evaluating 2D parametric curves.
Curve2DSample: A class that holds a sample of a 2D parametric curve, containing the value (the X, Y coordinates) of the curve at the parametric value t.
CurvedAnimation: An animation that applies a curve to another animation.
Curves: A collection of common animation curves.
CurveTween: Transforms the value of the given animation by the given curve.
CustomClipper<T>: An interface for providing custom clips.
CustomMultiChildLayout: A widget that uses a delegate to size and position multiple children.
CustomPaint: A widget that provides a canvas on which to draw during the paint phase.
CustomPainter: The interface used by CustomPaint (in the widgets library) and RenderCustomPaint (in the rendering library).
CustomPainterSemantics: Contains properties describing information drawn in a rectangle contained by the Canvas used by a CustomPaint.
CustomScrollView: A ScrollView that creates custom scroll effects using slivers.
CustomSemanticsAction: An identifier of a custom semantics action.
CustomSingleChildLayout: A widget that defers the layout of its single child to a delegate.
DarwinOptions: Platform-specific options for file picking on Apple platforms.
DarwinPlatformViewController: Base class for iOS and macOS view controllers.
DataCell: The data for a cell of a DataTable.
DataColumn: Column configuration for a DataTable.
Datagram: A data packet received by a RawDatagramSocket.
DataRow: Row configuration and cell data for a DataTable.
DataTable: A data table that follows the Material 2 design specification.
DataTableSource: A data source for obtaining row data for PaginatedDataTable objects.
DataTableTheme: Applies a data table theme to descendant DataTable widgets.
DataTableThemeData: Defines default property values for descendant DataTable widgets.
DatePickerDialog: A Material-style date picker dialog.
DatePickerTheme: An inherited widget that defines the visual properties for DatePickerDialogs in this widget's subtree.
DatePickerThemeData: Overrides the default values of visual properties for descendant DatePickerDialog widgets.
DateRangePickerDialog: A Material-style date range picker dialog.
DateTimeRange<T extends DateTime>: Encapsulates a start and end DateTime that represent the range of dates.
DateUtils: Utility functions for working with dates.
DebugCreator: A wrapper class for the Element that is the creator of a RenderObject.
DecoratedBox: A widget that paints a Decoration either before or after its child paints.
DecoratedBoxTransition: Animated version of a DecoratedBox that animates the different properties of its Decoration.
DecoratedSliver: A sliver widget that paints a Decoration either before or after its child paints.
Decoration: A description of a box decoration (a decoration applied to a Rect).
DecorationImage: An image for a box decoration.
DecorationImagePainter: The painter for a DecorationImage.
DecorationTween: An interpolation between two Decorations.
DefaultAssetBundle: A widget that determines the default asset bundle for its descendants.
DefaultMaterialLocalizations: US English strings for the material widgets.
DefaultPlatformMenuDelegate: The platform menu delegate that handles the built-in macOS platform menu generation using the 'flutter/menu' channel.
DefaultProcessTextService: The service used by default for the text processing feature.
DefaultSelectionStyle: The selection style to apply to descendant EditableText widgets which don't have an explicit style.
DefaultSpellCheckService: The service used by default to fetch spell check results for text input.
DefaultSvgTheme: The SVG theme to apply to descendant SvgPicture widgets which don't have explicit theme values.
DefaultTabController: The TabController for descendant widgets that don't specify one explicitly.
DefaultTextEditingShortcuts: A widget with the shortcuts used for the default text editing behavior.
DefaultTextHeightBehavior: The TextHeightBehavior that will apply to descendant Text and EditableText widgets which have not explicitly set Text.textHeightBehavior.
DefaultTextStyle: The text style to apply to descendant Text widgets which don't have an explicit style.
DefaultTextStyleTransition: Animated version of a DefaultTextStyle that animates the different properties of its TextStyle.
DefaultTransitionDelegate<T>: The default implementation of TransitionDelegate that the Navigator will use if its Navigator.transitionDelegate is not specified.
DefaultWidgetsLocalizations: US English localizations for the widgets library.
DeferredComponent: Manages the installation and loading of deferred components.
DelayedMultiDragGestureRecognizer: Recognizes movement both horizontally and vertically on a per-pointer basis after a delay.
DelegatingEventSink<T>: Simple delegating wrapper around an EventSink.
DelegatingFuture<T>: A wrapper that forwards calls to a Future.
DelegatingSink<T>: Simple delegating wrapper around a Sink.
DelegatingStream<T>: Simple delegating wrapper around a Stream.
DelegatingStreamConsumer<T>: Simple delegating wrapper around a StreamConsumer.
DelegatingStreamSink<T>: Simple delegating wrapper around a StreamSink.
DelegatingStreamSubscription<T>: Simple delegating wrapper around a StreamSubscription.
DeletableChipAttributes: An interface for Material Design chips that can be deleted.
DeleteCharacterIntent: Deletes the character before or after the caret location, based on whether forward is true.
DeleteToLineBreakIntent: Deletes from the current caret location to the previous or next soft or hard line break, based on whether forward is true.
DeleteToNextWordBoundaryIntent: Deletes from the current caret location to the previous or next word boundary, based on whether forward is true.
DesktopTextSelectionControls: Desktop Material styled text selection controls.
DesktopTextSelectionToolbar: A Material-style desktop text selection toolbar.
DesktopTextSelectionToolbarButton: A TextButton for the Material desktop text selection toolbar.
DesktopTextSelectionToolbarLayoutDelegate: Positions the toolbar at anchor if it fits, otherwise moves it so that it just fits fully on-screen.
DesktopWindowOptions: Configuration options common to desktop platforms (e.g. Linux and Windows).
DeviceGestureSettings: The device specific gesture settings scaled into logical pixels.
DeviceOrientationBuilder: Builds a widget tree that can depend on the device's orientation.
DevToolsDeepLinkProperty: Debugging message for DevTools deep links.
DiagnosticableNode<T extends Diagnosticable>: DiagnosticsNode that lazily calls the associated Diagnosticable value to implement getChildren and getProperties.
DiagnosticableTree: A base class for providing string and DiagnosticsNode debug representations describing the properties and children of an object.
DiagnosticableTreeNode: DiagnosticsNode for an instance of DiagnosticableTree.
DiagnosticPropertiesBuilder: Builder to accumulate properties and configuration used to assemble a DiagnosticsNode from a Diagnosticable object.
DiagnosticsBlock: DiagnosticsNode that exists mainly to provide a container for other diagnostics that typically lacks a meaningful value of its own.
DiagnosticsDebugCreator: A class that creates DiagnosticsNode by wrapping RenderObject.debugCreator.
DiagnosticsNode: Defines diagnostics data for a value.
DiagnosticsProperty<T>: Property with a value of type T.
DiagnosticsSerializationDelegate: A delegate that configures how a hierarchy of DiagnosticsNodes should be serialized.
DiagnosticsStackTrace: Diagnostic with a StackTrace value suitable for displaying stack traces as part of a FlutterError object.
Dialog: A Material Design dialog.
DialogRoute<T>: A dialog route with Material entrance and exit animations, modal barrier color, and modal barrier behavior (dialog is dismissible with a tap on the barrier).
DialogTheme: Defines a theme for Dialog widgets.
DialogThemeData: Defines default property values for descendant Dialog widgets.
DirectionalCaretMovementIntent: A DirectionalTextEditingIntent that moves the caret or the selection to a new location.
DirectionalFocusAction: An Action that moves the focus to the focusable node in the direction configured by the associated DirectionalFocusIntent.direction.
DirectionalFocusIntent: An Intent that represents moving to the next focusable node in the given direction.
Directionality: A widget that determines the ambient directionality of text and text-direction-sensitive render objects.
DirectionallyExtendSelectionEvent: Extends the current selection with respect to a direction.
DirectionalTextEditingIntent: A text editing related Intent that performs an operation towards a given direction of the current caret location.
Directory: A reference to a directory (or folder) on the file system.
DisabledChipAttributes: An interface for Material Design chips that can be enabled and disabled.
DisabledMapCachingProvider: Caching provider which disables built-in caching
DisableWidgetInspectorScope: Disables the Flutter DevTools Widget Inspector for a Widget subtree.
DismissAction: An Action that dismisses the focused widget.
Dismissible: A widget that can be dismissed by dragging in the indicated direction.
DismissIntent: An Intent that dismisses the currently focused widget.
DismissMenuAction: An action that closes all the menus associated with the given MenuController.
DismissUpdateDetails: Details for DismissUpdateCallback.
DisplayFeatureSubScreen: Positions child such that it avoids overlapping any DisplayFeature that splits the screen into sub-screens.
DisposableBuildContext<T extends State<StatefulWidget>>: Provides non-leaking access to a BuildContext.
Distance: Calculates the distance between points.
DistanceCalculator
DistanceHaversine: Shortcut for final Distance distance = const Distance(calculator: const Haversine());
DistanceVincenty: Shortcut for final Distance distance = const Distance(calculator: const Vincenty());
Divider: A thin horizontal line, with padding on either side.
DividerTheme: An inherited widget that defines the configuration for Dividers, VerticalDividers, dividers between ListTiles, and dividers between rows in DataTables in this widget's subtree.
DividerThemeData: Defines the visual properties of Divider, VerticalDivider, dividers between ListTiles, and dividers between rows in DataTables.
DocumentationIcon: A class annotation to provide a URL to an image that represents the class.
DocumentBoundary: A text boundary that uses the entire document as logical boundary.
DoNothingAction: An Action that doesn't perform any action when invoked.
DoNothingAndStopPropagationIntent: An Intent that is bound to a DoNothingAction, but, in addition to not performing an action, also stops the propagation of the key event bound to this intent to other key event handlers in the focus chain.
DoNothingAndStopPropagationTextIntent: An Intent to send the event straight to the engine.
DoNothingIntent: An Intent that is bound to a DoNothingAction.
DoubleProperty: Property describing a double value with an optional unit of measurement.
DoubleTapGestureRecognizer: Recognizes when the user has tapped the screen at the same location twice in quick succession.
Drag: Interface for objects that receive updates about drags.
DragBoundary: Provides a DragBoundaryDelegate for its descendants whose bounds are those defined by this widget.
DragBoundaryDelegate<T>: The interface for defining the algorithm for a boundary that a specified shape is dragged within.
DragDownDetails: Details object for callbacks that use GestureDragDownCallback.
DragEndDetails: Details object for callbacks that use GestureDragEndCallback.
Draggable<T extends Object>: A widget that can be dragged from to a DragTarget.
DraggableDetails: Represents the details when a specific pointer event occurred on the Draggable.
DraggableScrollableActuator: A widget that can notify a descendent DraggableScrollableSheet that it should reset its position to the initial state.
DraggableScrollableController: Controls a DraggableScrollableSheet.
DraggableScrollableNotification: A Notification related to the extent, which is the size, and scroll offset, which is the position of the child list, of the DraggableScrollableSheet.
DraggableScrollableSheet: A container for a Scrollable that responds to drag gestures by resizing the scrollable until a limit is reached, and then scrolling.
DragGestureRecognizer: Recognizes movement.
DragScrollActivity: The activity a scroll view performs when the user drags their finger across the screen.
DragStartDetails: Details object for callbacks that use GestureDragStartCallback.
DragTarget<T extends Object>: A widget that receives data when a Draggable widget is dropped.
DragTargetDetails<T>: Represents the details when a pointer event occurred on the DragTarget.
DragUpdateDetails: Details object for callbacks that use GestureDragUpdateCallback.
Drawer: A Material Design panel that slides in horizontally from the edge of a Scaffold to show navigation links in an application.
DrawerButton: A Material Design drawer icon button.
DrawerButtonIcon: A "drawer" icon that's appropriate for the current TargetPlatform.
DrawerController: Provides interactive behavior for Drawer widgets.
DrawerControllerState: State for a DrawerController.
DrawerHeader: The top-most region of a Material Design drawer. The header's child widget, if any, is placed inside a Container whose decoration can be passed as an argument, inset by the given padding.
DrawerTheme: An inherited widget that defines visual properties for Drawers in this widget's subtree.
DrawerThemeData: Defines default property values for descendant Drawer widgets.
DrivenScrollActivity: An activity that drives a scroll view through a given animation.
DropdownButton<T>: A Material Design button for selecting from a list of items.
DropdownButtonFormField<T>: A FormField that contains a DropdownButton.
DropdownButtonHideUnderline: An inherited widget that causes any descendant DropdownButton widgets to not include their regular underline.
DropdownMenu<T>: A dropdown menu that can be opened from a TextField. The selected menu item is displayed in that field.
DropdownMenuEntry<T>: Defines a DropdownMenu menu button that represents one item view in the menu.
DropdownMenuFormField<T>: A FormField that contains a DropdownMenu.
DropdownMenuItem<T>: An item in a menu created by a DropdownButton.
DropdownMenuTheme: An inherited widget that defines the visual properties for DropdownMenus in this widget's subtree.
DropdownMenuThemeData: Overrides the default values of visual properties for descendant DropdownMenu widgets.
DropRangeSliderValueIndicatorShape: The shape of a Material 3 RangeSlider's value indicators.
DropShadow
DropSliderValueIndicatorShape: The default shape of a Material 3 Slider's value indicator.
DualTransitionBuilder: A transition builder that animates its child based on the AnimationStatus of the provided animation.
Durations: The set of durations in the Material specification.
EagerGestureRecognizer: A gesture recognizer that eagerly claims victory in all gesture arenas.
Easing: The set of easing curves in the Material specification.
EdgeDraggingAutoScroller: An auto scroller that scrolls the scrollable if a drag gesture drags close to its edge.
EdgeInsets: An immutable set of offsets in each of the four cardinal directions.
EdgeInsetsDirectional: An immutable set of offsets in each of the four cardinal directions, but whose horizontal components are dependent on the writing direction.
EdgeInsetsGeometry: Base class for EdgeInsets that allows for text-direction aware resolution.
EdgeInsetsGeometryTween: An interpolation between two EdgeInsetsGeometrys.
EdgeInsetsTween: An interpolation between two EdgeInsetss.
EditableText: A basic text input field.
EditableTextState: State for an EditableText.
EditableTextTapOutsideIntent: An Intent that represents a tap outside the field.
EditableTextTapUpOutsideIntent: An Intent that represents a tap outside the field.
ElasticInCurve: An oscillating curve that grows in magnitude while overshooting its bounds.
ElasticInOutCurve: An oscillating curve that grows and then shrinks in magnitude while overshooting its bounds.
ElasticOutCurve: An oscillating curve that shrinks in magnitude while overshooting its bounds.
Element: An instantiation of a Widget at a particular location in the tree.
ElevatedButton: A Material Design "elevated button".
ElevatedButtonTheme: Overrides the default ButtonStyle of its ElevatedButton descendants.
ElevatedButtonThemeData: A ButtonStyle that overrides the default appearance of ElevatedButtons when it's used with ElevatedButtonTheme or with the overall Theme's ThemeData.elevatedButtonTheme.
ElevationOverlay: A utility class for dealing with the overlay color needed to indicate elevation of surfaces.
EmptyTextSelectionControls: Text selection controls that do not show any toolbars or handles.
EnableWidgetInspectorScope: Enables the Flutter DevTools Widget Inspector for a Widget subtree.
Encoding: Open-ended set of encodings.
EndDrawerButton: A Material Design end drawer icon button.
EndDrawerButtonIcon: A "end drawer" icon that's appropriate for the current TargetPlatform.
Endian: Endianness of number representation.
EnumProperty<T extends Enum?>: DiagnosticsProperty that has an Enum as value.
Epsg3857: EPSG:3857, The most common CRS used for rendering maps.
Epsg4326: EPSG:4326, A common CRS among GIS enthusiasts. Uses simple Equirectangular projection.
ErrorDescription: An explanation of the problem and its cause, any information that may help track down the problem, background information, etc.
ErrorHint: An ErrorHint provides specific, non-obvious advice that may be applicable.
ErrorResult: A result representing a thrown error.
ErrorSpacer: An ErrorSpacer creates an empty DiagnosticsNode, that can be used to tune the spacing between other DiagnosticsNode objects.
ErrorSummary: A short (one line) description of the problem that was detected.
ErrorToConsoleDumper: Dumps error messages to the console.
ErrorWidget: A widget that renders an exception's message.
EventChannel: A named channel for communicating with platform plugins using event streams.
EventSink<T>: A Sink that supports adding errors.
EventSinkBase<T>: An abstract class that implements EventSink in terms of onAdd, onError, and onClose methods.
ExactAssetImage: Fetches an image from an AssetBundle, associating it with the given scale.
ExcludeFocus: A widget that controls whether or not the descendants of this widget are focusable.
ExcludeFocusTraversal: A widget that controls whether or not the descendants of this widget are traversable.
ExcludeSemantics: A widget that drops all the semantics of its descendants.
Expanded: A widget that expands a child of a Row, Column, or Flex so that the child fills the available space.
ExpandIcon: A widget representing a rotating expand/collapse button. The icon rotates 180 degrees when pressed, then reverts the animation on a second press. The underlying icon is Icons.expand_more.
ExpandSelectionToDocumentBoundaryIntent: Expands the current selection to the document boundary in the direction given by forward.
ExpandSelectionToLineBreakIntent: Expands the current selection to the closest line break in the direction given by forward.
Expansible: A StatefulWidget that expands and collapses.
ExpansibleController: A controller for managing the expansion state of an Expansible.
ExpansionPanel: A material expansion panel. It has a header and a body and can be either expanded or collapsed. The body of the panel is only visible when it is expanded.
ExpansionPanelList: A material expansion panel list that lays out its children and animates expansions.
ExpansionPanelRadio: An expansion panel that allows for radio-like functionality. This means that at any given time, at most, one ExpansionPanelRadio can remain expanded.
ExpansionTile: A single-line ListTile with an expansion arrow icon that expands or collapses the tile to reveal or hide the children.
ExpansionTileTheme: Overrides the default ExpansionTileTheme of its ExpansionTile descendants.
ExpansionTileThemeData: Used with ExpansionTileTheme to define default property values for descendant ExpansionTile widgets.
ExpensiveAndroidViewController: Controls an Android view that is composed using the Android view hierarchy. This controller is created from the PlatformViewsService.initExpensiveAndroidView factory.
ExtendSelectionByCharacterIntent: Extends, or moves the current selection from the current TextSelection.extent position to the previous or the next character boundary.
ExtendSelectionToDocumentBoundaryIntent: Extends, or moves the current selection from the current TextSelection.extent position to the start or the end of the document.
ExtendSelectionToLineBreakIntent: Extends, or moves the current selection from the current TextSelection.extent position to the closest line break in the direction given by forward.
ExtendSelectionToNextParagraphBoundaryIntent: Extends, or moves the current selection from the current TextSelection.extent position to the previous or the next paragraph boundary.
ExtendSelectionToNextParagraphBoundaryOrCaretLocationIntent: Extends, or moves the current selection from the current TextSelection.extent position to the previous or the next paragraph boundary depending on the forward parameter.
ExtendSelectionToNextWordBoundaryIntent: Extends, or moves the current selection from the current TextSelection.extent position to the previous or the next word boundary.
ExtendSelectionToNextWordBoundaryOrCaretLocationIntent: Extends, or moves the current selection from the current TextSelection.extent position to the previous or the next word boundary, or the TextSelection.base position if it's closer in the move direction.
ExtendSelectionVerticallyToAdjacentLineIntent: Extends, or moves the current selection from the current TextSelection.extent position to the closest position on the adjacent line.
ExtendSelectionVerticallyToAdjacentPageIntent: Expands, or moves the current selection from the current TextSelection.extent position to the closest position on the adjacent page.
Factory<T>: A factory interface that also reports the type of the created objects.
FadeForwardsPageTransitionsBuilder: Used by PageTransitionsTheme to define a horizontal MaterialPageRoute page transition animation that looks like the default page transition used on Android U.
FadeInImage: An image that shows a placeholder image while the target image is loading, then fades in the new image when it loads.
FadeInTileDisplay: Displays a tile with a fade-in animation
FadeRAWA: Prebuilt animation provider for a RichAttributionWidget
FadeTransition: Animates the opacity of a widget.
FadeUpwardsPageTransitionsBuilder: A page transition builder that animates incoming pages by fading and sliding them upwards.
Feedback: Provides platform-specific acoustic and/or haptic feedback for certain actions.
File: A reference to a file on the file system.
FileImage: Decodes the given File object as an image, associating it with the given scale.
FileLock: Type of lock when requesting a lock on a file.
FileLottie
FileMode: The modes in which a File can be opened.
FilePicker: The primary entry point for picking files and directories across platforms.
FilePickerPlatform: The interface that implementations of file_picker must implement.
FilePickerSaveUtils
FileStat: The result of calling the POSIX stat() function on a file system object.
FileSystemCreateEvent: File system event for newly created file system objects.
FileSystemDeleteEvent: File system event for deletion of file system objects.
FileSystemEntity: The common superclass of File, Directory, and Link.
FileSystemEntityType: The type of an entity on the file system, such as a file, directory, or link.
FileSystemEvent: Base event class emitted by FileSystemEntity.watch.
FileSystemModifyEvent: File system event for modifications of file system objects.
FileSystemMoveEvent: File system event for moving of file system objects.
FileTileProvider: Fetch tiles from the local filesystem (not asset store), where the tile URL is a path within the filesystem.
FilledButton: A Material Design filled button.
FilledButtonTheme: Overrides the default ButtonStyle of its FilledButton descendants.
FilledButtonThemeData: A ButtonStyle that overrides the default appearance of FilledButtons when it's used with FilledButtonTheme or with the overall Theme's ThemeData.filledButtonTheme.
FilterChip: A Material Design filter chip.
FilteringTextInputFormatter: A TextInputFormatter that prevents the insertion of characters matching (or not matching) a particular pattern, by replacing the characters with the given replacementString.
FitBounds: The CameraFit should fit inside a given LatLngBounds.
FitCoordinates: Use this CameraFit if the MapCamera should fit a list of LatLng coordinates.
FitInsideBounds: A CameraFit that should get be within given LatLngBounds.
FittedBox: Scales and positions its child within itself according to fit.
FittedSizes: The pair of sizes returned by applyBoxFit.
FixedColumnWidth: Sizes the column to a specific number of pixels.
FixedExtentMetrics: Metrics for a ScrollPosition to a scroll view with fixed item sizes.
FixedExtentScrollController: A controller for scroll views whose items have the same size.
FixedExtentScrollPhysics: A snapping physics that always lands directly on items instead of anywhere within the scroll extent.
FixedScrollMetrics: An immutable snapshot of values associated with a Scrollable viewport.
FlagProperty: Property where the description is either ifTrue or ifFalse depending on whether value is true or false.
FlagsSummary<T>: A summary of multiple properties, indicating whether each of them is present (non-null) or absent (null).
Flex: A widget that displays its children in a one-dimensional array.
FlexColumnWidth: Sizes the column by taking a part of the remaining space once all the other columns have been laid out.
Flexible: A widget that controls how a child of a Row, Column, or Flex flexes.
FlexibleSpaceBar: The part of a Material Design AppBar that expands, collapses, and stretches.
FlexibleSpaceBarSettings: Provides sizing and opacity information to a FlexibleSpaceBar.
FlexParentData: Parent data for use with RenderFlex.
FlippedCurve: A curve that is the reversed inversion of its given curve.
FlippedTweenSequence: Enables creating a flipped Animation whose value is defined by a sequence of Tweens.
Float32List: A fixed-length list of IEEE 754 single-precision binary floating-point numbers that is viewable as a TypedData.
Float64List: A fixed-length list of IEEE 754 double-precision binary floating-point numbers that is viewable as a TypedData.
FloatingActionButton: A Material Design floating action button.
FloatingActionButtonAnimator: Provider of animations to move the FloatingActionButton between FloatingActionButtonLocations.
FloatingActionButtonLocation: An object that defines a position for the FloatingActionButton based on the Scaffold's ScaffoldPrelayoutGeometry.
FloatingActionButtonTheme: An inherited widget that defines the configuration for FloatingActionButtons in this widget's subtree.
FloatingActionButtonThemeData: Defines default property values for descendant FloatingActionButton widgets.
FloatingHeaderSnapConfiguration: Specifies how a floating header is to be "snapped" (animated) into or out of view.
FloatingLabelAlignment: Defines where the floating label should be displayed within an InputDecorator.
Flow: A widget that sizes and positions children efficiently, according to the logic in a FlowDelegate.
FlowDelegate: A delegate that controls the appearance of a flow layout.
FlowPaintingContext: A context in which a FlowDelegate paints.
FlowParentData: Parent data for use with RenderFlow.
FlutterErrorDetails: Class for information provided to FlutterExceptionHandler callbacks.
FlutterErrorDetailsForPointerEventDispatcher: Variant of FlutterErrorDetails with extra fields for the gesture library's binding's pointer event dispatcher (GestureBinding.dispatchEvent).
FlutterLogo: The Flutter logo, in widget form. This widget respects the IconTheme. For guidelines on using the Flutter logo, visit https://flutter.cn/brand.
FlutterLogoDecoration: An immutable description of how to paint Flutter's logo.
FlutterMap: An interactive geographical map
FlutterMemoryAllocations: An interface for listening to object lifecycle events.
FlutterTimeline: Measures how long blocks of code take to run.
FlutterVersion: Details about the Flutter version this app was compiled with, corresponding to the output of flutter --version.
FlutterView: A view into which a Flutter Scene is drawn.
Focus: A widget that manages a FocusNode to allow keyboard focus to be given to this widget and its descendants.
FocusableActionDetector: A widget that combines the functionality of Actions, Shortcuts, MouseRegion and a Focus widget to create a detector that defines actions and key bindings, and provides callbacks for handling focus and hover highlights.
FocusAttachment: An attachment point for a FocusNode.
FocusManager: Manages the focus tree.
FocusNode: An object that can be used by a stateful widget to obtain the keyboard focus and to handle keyboard events.
FocusOrder: Base class for all sort orders for OrderedTraversalPolicy traversal.
FocusScope: A FocusScope is similar to a Focus, but also serves as a scope for its descendants, restricting focus traversal to the scoped controls.
FocusScopeNode: A subclass of FocusNode that acts as a scope for its descendants, maintaining information about which descendant is currently or was last focused.
FocusSemanticEvent: An event to move the accessibility focus.
FocusTraversalGroup: A widget that describes the inherited focus policy for focus traversal for its descendants, grouping them into a separate traversal group.
FocusTraversalOrder: An inherited widget that describes the order in which its child subtree should be traversed.
FocusTraversalPolicy: Determines how focusable widgets are traversed within a FocusTraversalGroup.
FollowerLayer: A composited layer that applies a transformation matrix to its children such that they are positioned to match a LeaderLayer.
FontFeature: A feature tag and value that affect the selection of glyphs in a font.
FontLoader: A class that enables the dynamic loading of fonts at runtime.
FontVariation: An axis tag and value that can be used to customize variable fonts.
FontWeight: The thickness of the glyphs used to draw the text.
ForcePressDetails: Details object for callbacks that use GestureForcePressStartCallback, GestureForcePressPeakCallback, GestureForcePressEndCallback or GestureForcePressUpdateCallback.
ForcePressGestureRecognizer: Recognizes a force press on devices that have force sensors.
Form: An optional container for grouping together multiple form field widgets (e.g. TextField widgets).
FormField<T>: A single form field.
FormFieldState<T>: The current state of a FormField. Passed to the FormFieldBuilder method for use in constructing the form field's widget.
FormState: State associated with a Form widget.
FractionallySizedBox: A widget that sizes its child to a fraction of the total available space. For more details about the layout algorithm, see RenderFractionallySizedOverflowBox.
FractionalOffset: An offset that's expressed as a fraction of a Size.
FractionalOffsetTween: An interpolation between two fractional offsets.
FractionalTranslation: Applies a translation transformation before painting its child.
FractionColumnWidth: Sizes the column to a fraction of the table's constraints' maxWidth.
FrameRate
Future<T>: The result of an asynchronous computation.
FutureBuilder<T>: A widget that builds itself based on the latest snapshot of interaction with a Future.
FutureGroup<T>: A collection of futures waits until all added Futures complete.
FutureOr<T>: A type representing values that are either Future<T> or T.
GappedRangeSliderTrackShape: The GappedRangeSliderTrackShape consists of active and inactive tracks. The active track uses the SliderThemeData.activeTrackColor and the inactive tracks uses the SliderThemeData.inactiveTrackColor.
GappedSliderTrackShape: The gapped shape of a Slider's track.
GestureArenaEntry: An interface to pass information to an arena.
GestureArenaManager: Used for disambiguating the meaning of sequences of pointer events.
GestureArenaMember: Represents an object participating in an arena.
GestureArenaTeam: A group of GestureArenaMember objects that are competing as a unit in the GestureArenaManager.
GestureDetector: A widget that detects gestures.
GestureRecognizer: The base class that all gesture recognizers inherit from.
GestureRecognizerFactory<T extends GestureRecognizer>: Factory for creating gesture recognizers.
GestureRecognizerFactoryWithHandlers<T extends GestureRecognizer>: Factory for creating gesture recognizers that delegates to callbacks.
GLFWKeyHelper: Helper class that uses GLFW-specific key mappings.
GlobalCupertinoLocalizations: Implementation of localized strings for Cupertino widgets using the intl package for date and time formatting.
GlobalKey<T extends State<StatefulWidget>>: A key that is unique across the entire app.
GlobalMaterialLocalizations: Implementation of localized strings for the material widgets using the intl package for date and time formatting.
GlobalObjectKey<T extends State<StatefulWidget>>: A global key that takes its identity from the object used as its value.
GlobalWidgetsLocalizations: Localized values for widgets.
GlowingOverscrollIndicator: A visual indication that a scroll view has overscrolled.
GlyphInfo: The measurements of a character (or a sequence of visually connected characters) within a paragraph.
Gradient: A 2D gradient.
GradientRotation: A GradientTransform that rotates the gradient around the center-point of its bounding box.
GradientTransform: Base class for transforming gradient shaders without applying the same transform to the entire canvas.
GranularlyExtendSelectionEvent: Extends the start or end of the selection by a given TextGranularity.
GregorianCalendarDelegate: A CalendarDelegate implementation for the Gregorian calendar system.
GridPaper: A widget that draws a rectilinear grid of lines one pixel wide.
GridTile: A tile in a Material Design grid list.
GridTileBar: A header used in a Material Design GridTile.
GridView: A scrollable, 2D array of widgets.
GtkKeyHelper: Helper class that uses GTK-specific key mappings.
GZipCodec: The GZipCodec encodes raw bytes to GZip compressed bytes and decodes GZip compressed bytes to raw bytes.
HandleRangeSliderThumbShape: The bar shape of RangeSlider's thumbs.
HandleThumbShape: The bar shape of a Slider's thumb.
HapticFeedback: Allows access to the haptic feedback interface on the device.
HardwareKeyboard: Manages key events from hardware keyboards.
HashedObserverList<T>: A list optimized for the observer pattern, but for larger numbers of observers.
Haversine
HeaderValue: Representation of a header value in the form:
Hero: A widget that marks its child as being a candidate for hero animations.
HeroController: A Navigator observer that manages Hero transitions.
HeroControllerScope: An inherited widget to host a hero controller.
HeroMode: Enables or disables Heroes in the widget subtree.
HexInterpreter: Like BcdInterpreter but every nibble is a hex digit, so A-F survive.
HitTestable: An object that can hit-test pointers.
HitTestDispatcher: An object that can dispatch events.
HitTestEntry<T extends HitTestTarget>: Data collected during a hit test about a specific HitTestTarget.
HitTestResult: The result of performing a hit test.
HitTestTarget: An object that can handle events.
HoldScrollActivity: A scroll activity that does nothing but can be released to resume normal idle behavior.
HorizontalDragGestureRecognizer: Recognizes movement in the horizontal direction.
HorizontalMultiDragGestureRecognizer: Recognizes movement in the horizontal direction on a per-pointer basis.
HostConfig: Everything about this terminal's relationship with the acquirer that does not change per transaction. Ported from HostConfig.
HostConfigCodec: Reads an Apos_android hostConfig.json, whether it is plain JSON or the obfuscated form the app ships: base64, then each byte XORed with (index % 253) + 4.
HostConnectionInfo: Where and how to reach the host. Ported from HostConnectionInfo.
HostContext: Mutable state that survives a transaction: which keys are loaded, who the terminal is, what the host called it. Ported from HostContext.
HostStateStore: Where the context is persisted between runs. The app supplies this — the package does no file or preference access of its own.
HSLColor: A color represented using alpha, hue, saturation, and lightness.
HSVColor: A color represented using alpha, hue, saturation, and value.
HtmlElementView: Embeds an HTML element in the Widget hierarchy in Flutter web.
HtmlEscape: Converter which escapes characters with special meaning in HTML.
HtmlEscapeMode: HTML escape modes.
HttpAuthRequest: Defines the parameters of a pending HTTP authentication request received by the webview through a HttpAuthRequestCallback.
HttpClient: An HTTP client for communicating with an HTTP server.
HttpClientBasicCredentials: Represents credentials for basic authentication.
HttpClientBearerCredentials: Represents credentials for bearer token authentication.
HttpClientCredentials: Represents credentials for authentication in HttpClient.
HttpClientDigestCredentials: Represents credentials for digest authentication.
HttpClientRequest: HTTP request for a client connection.
HttpClientResponse: HTTP response for a client connection.
HttpConnectionInfo: Information about an HttpRequest, HttpResponse, HttpClientRequest, or HttpClientResponse connection.
HttpConnectionsInfo: Summary statistics about an HttpServers current socket connections.
HttpDate: Utility functions for working with dates with HTTP specific date formats.
HttpHeaders: Headers for HTTP requests and responses.
HttpOverrides: This class facilitates overriding HttpClient with a mock implementation. It should be extended by another class in client code with overrides that construct a mock implementation. The implementation in this base class defaults to the actual HttpClient implementation. For example:
HttpRequest: A server-side object that contains the content of and information about an HTTP request.
HttpResponse: An HTTP response, which returns the headers and data from the server to the client in response to an HTTP request.
HttpResponseError: Error returned in PlatformNavigationDelegate.setOnHttpError when an HTTP response error has been received.
HttpServer: A server that delivers content, such as web pages, using the HTTP protocol.
HttpSession: The HttpRequest.session of an HttpRequest.
HttpStatus: HTTP status codes. Exported in dart:io and dart:html.
HybridAndroidViewController: Controls an Android view that is composed using the Android view hierarchy. This controller is created from the PlatformViewsService.initHybridAndroidView factory.
Icon: A graphical icon widget drawn with a glyph from a font described in an IconData such as material's predefined IconDatas in Icons.
IconButton: A Material Design icon button.
IconButtonTheme: Overrides the default ButtonStyle of its IconButton descendants.
IconButtonThemeData: A ButtonStyle that overrides the default appearance of IconButtons when it's used with the IconButton, the IconButtonTheme or the overall Theme's ThemeData.iconButtonTheme.
IconData: A description of an icon fulfilled by a font glyph.
IconDataProperty: DiagnosticsProperty that has an IconData as value.
Icons: Identifiers for the supported Material Icons.
IconTheme: Controls the default properties of icons in a widget subtree.
IconThemeData: Defines the size, font variations, color, opacity, and shadows of icons.
IdleScrollActivity: A scroll activity that does nothing.
IfaBinary: Fixed-length binary written as ASCII hex. IFA_BINARY.
IfaBitmap: ASCII-hex bitmap. IFA_BITMAP in the Java.
IfaNumeric: Fixed-length ASCII digits, zero padded on the left. IFA_NUMERIC.
IfaVarBinary: IFA_LBINARY, IFA_LLBINARY, IFA_LLLBINARY, IFA_LLLLBINARY.
IfaVarChar: IFA_LCHAR, IFA_LLCHAR, IFA_LLLCHAR, IFA_LLLLCHAR, IFA_LLNUM.
IfbBinary: Fixed-length raw binary. IFB_BINARY.
IfbBitmap: Binary bitmap. IFB_BITMAP in the Java.
IfbLllhChar: IFB_LLLHCHAR — two-byte binary length, characters in the host charset.
IfbLlnum: IFB_LLNUM — BCD length, BCD digits. The PAN and acquirer-id shape.
IfbNumeric: Fixed-length BCD digits, zero padded on the left. IFB_NUMERIC.
IfbVarBinary: IFB_LLBINARY, IFB_LLLBINARY — BCD length, raw binary value.
IfbVarChar: IFB_LLCHAR, IFB_LLLCHAR — BCD length, characters in the host charset.
IfChar: Fixed-length characters, space padded on the right, truncating. IF_CHAR.
IfHexBitmap: Fixed-width ASCII-hex bitmap. IFHex_BITMAP in the Java.
IfNop: A field that occupies no bytes. IF_NOP.
IgnoreBaseline: A widget that causes the parent to ignore the child for the purposes of baseline alignment.
IgnorePointer: A widget that is invisible during hit testing.
Image: A widget that displays an image.
ImageCache: Class for caching images.
ImageCacheStatus: Information about how the ImageCache is tracking an image.
ImageChunkEvent: An immutable notification of image bytes that have been incrementally loaded.
ImageConfiguration: Configuration information passed to the ImageProvider.resolve method to select a specific image.
ImageFilterConfig: A description of an image filter that can adapt to the layout of its target.
ImageFilterContext: Context information provided when resolving an ImageFilterConfig.
ImageFiltered: Applies an ImageFilter to its child.
ImageFilterLayer: A composite layer that applies an ui.ImageFilter to its children.
ImageIcon: An icon that comes from an ImageProvider, e.g. an AssetImage.
ImageInfo: A dart:ui.Image object with its corresponding scale.
ImageProvider<T extends Object>: Identifies an image without committing to the precise final asset. This allows a set of images to be identified and for the precise image to later be resolved based on the environment, e.g. the device pixel ratio.
ImageShader: A shader (as used by Paint.shader) that tiles an image.
ImageSizeInfo: Tracks the bytes used by a dart:ui.Image compared to the bytes needed to paint that image without scaling it.
ImageStream: A handle to an image resource.
ImageStreamCompleter: Base class for those that manage the loading of dart:ui.Image objects for ImageStreams.
ImageStreamCompleterHandle: An opaque handle that keeps an ImageStreamCompleter alive even if it has lost its last listener.
ImageStreamListener: Interface for receiving notifications about the loading of an image.
ImmediateMultiDragGestureRecognizer: Recognizes movement both horizontally and vertically on a per-pointer basis.
ImmutableBuffer: A handle to a read-only byte buffer that is managed by the engine.
ImplicitlyAnimatedWidget: An abstract class for building widgets that animate changes to their properties.
ImplicitlyAnimatedWidgetState<T extends ImplicitlyAnimatedWidget>: A base class for the State of widgets with implicit animations.
IndexedSemantics: A widget that annotates the child semantics with an index.
IndexedSlot<T extends Element?>: A value for Element.slot used for children of MultiChildRenderObjectElements.
IndexedStack: A Stack that shows a single child from a list of children.
InheritedElement: An Element that uses an InheritedWidget as its configuration.
InheritedModel<T>: An InheritedWidget that's intended to be used as the base class for models whose dependents may only depend on one part or "aspect" of the overall model.
InheritedModelElement<T>: An Element that uses a InheritedModel as its configuration.
InheritedNotifier<T extends Listenable>: An inherited widget for a Listenable notifier, which updates its dependencies when the notifier is triggered.
InheritedTheme: An InheritedWidget that defines visual properties like colors and text styles, which the child's subtree depends on.
InheritedWidget: Base class for widgets that efficiently propagate information down the tree.
Ink: A convenience widget for drawing images and other decorations on Material widgets, so that InkWell and InkResponse splashes will render over them.
InkDecoration: A decoration on a part of a Material.
InkFeature: A visual reaction on a piece of Material.
InkHighlight: A visual emphasis on a part of a Material receiving user interaction.
InkResponse: An area of a Material that responds to touch. Has a configurable shape and can be configured to clip splashes that extend outside its bounds or not.
InkRipple: A visual reaction on a piece of Material to user input.
InkSparkle: Begin a Material 3 ink sparkle ripple, centered at the tap or click position relative to the referenceBox.
InkSplash: A visual reaction on a piece of Material to user input.
InkWell: A rectangular area of a Material that responds to touch.
InlineSpan: An immutable span of inline content which forms part of a paragraph.
InlineSpanSemanticsInformation: The textual and semantic label information for an InlineSpan.
InputBorder: Defines the appearance of an InputDecorator's border.
InputChip: A Material Design input chip.
InputDatePickerFormField: A TextFormField configured to accept and validate a date entered by a user.
InputDecoration: The border, labels, icons, and styles used to decorate a Material Design text field.
InputDecorationTheme: Defines the default appearance of InputDecorators.
InputDecorationThemeData: Defines the default appearance of InputDecorators.
InputDecorator: Defines the appearance of a Material Design text field.
InspectorButton: An abstract base class for creating Material or Cupertino-styled inspector buttons.
InspectorReferenceData: Structure to help reference count Dart objects referenced by a GUI tool using WidgetInspectorService.
InspectorSelection: Mutable selection state of the inspector.
InspectorSerializationDelegate: A delegate that configures how a hierarchy of DiagnosticsNodes are serialized by the Flutter Inspector.
InstantaneousTileDisplay: Displays a tile instantaneously
Int32List: A fixed-length list of 32-bit signed integers that is viewable as a TypedData.
Int64List: A fixed-length list of 64-bit signed integers that is viewable as a TypedData.
Intent: An abstract class representing a particular configuration of an Action.
InteractionOptions: All interactive options for FlutterMap
InteractiveFlag: Use InteractiveFlag to disable / enable certain events Use InteractiveFlag.all to enable all events, use InteractiveFlag.none to disable all events
InteractiveInkFeature: An ink feature that displays a color "splash" in response to a user gesture that can be confirmed or canceled.
InteractiveInkFeatureFactory: An encapsulation of an InteractiveInkFeature constructor used by InkWell, InkResponse, and ThemeData.
InteractiveViewer: A widget that enables pan and zoom interactions with its child.
InterfaceAddress: An InternetAddress bound to a NetworkInterface, extended with network configuration details.
InternetAddress: An internet address or a Unix domain address.
InternetAddressType: The type, or address family, of an InternetAddress.
Interval: A curve that is 0.0 until begin, then curved (according to curve) from 0.0 at begin to 1.0 at end, then remains 1.0 past end.
IntProperty: An int valued property with an optional unit the value is measured in.
IntrinsicColumnWidth: Sizes the column according to the intrinsic dimensions of all the cells in that column.
IntrinsicHeight: A widget that sizes its child to the child's intrinsic height.
IntrinsicWidth: A widget that sizes its child to the child's maximum intrinsic width.
IntTween: An interpolation between two integers that rounds.
IOOverrides: Facilities for overriding various APIs of dart:io with mock implementations.
IOSink: A combined byte and text output.
IOSinkBase: An abstract class that implements dart:io's IOSink's API in terms of onAdd, onError, onClose, and onFlush methods.
IOSScrollViewFlingVelocityTracker: A VelocityTracker subclass that provides a close approximation of iOS scroll view's velocity estimation strategy.
IOSSystemContextMenuItem: Describes a context menu button that will be rendered in the iOS system context menu and not by Flutter itself.
IOSSystemContextMenuItemCopy: Creates an instance of IOSSystemContextMenuItem for the system's built-in copy button.
IOSSystemContextMenuItemCustom: Creates an instance of IOSSystemContextMenuItem for custom action buttons defined by the developer.
IOSSystemContextMenuItemCut: Creates an instance of IOSSystemContextMenuItem for the system's built-in cut button.
IOSSystemContextMenuItemData: Describes a context menu button that will be rendered in the system context menu.
IOSSystemContextMenuItemDataCopy: An IOSSystemContextMenuItemData for the system's built-in copy button.
IOSSystemContextMenuItemDataCustom: An IOSSystemContextMenuItemData for custom action buttons defined by the developer.
IOSSystemContextMenuItemDataCut: An IOSSystemContextMenuItemData for the system's built-in cut button.
IOSSystemContextMenuItemDataLiveText: An IOSSystemContextMenuItemData for the system's built-in Live Text (OCR) button.
IOSSystemContextMenuItemDataLookUp: An IOSSystemContextMenuItemData for the system's built-in look up button.
IOSSystemContextMenuItemDataPaste: An IOSSystemContextMenuItemData for the system's built-in paste button.
IOSSystemContextMenuItemDataSearchWeb: An IOSSystemContextMenuItemData for the system's built-in search web button.
IOSSystemContextMenuItemDataSelectAll: An IOSSystemContextMenuItemData for the system's built-in select all button.
IOSSystemContextMenuItemDataShare: An IOSSystemContextMenuItemData for the system's built-in share button.
IOSSystemContextMenuItemLiveText: Creates an instance of IOSSystemContextMenuItem for the system's built-in Live Text button.
IOSSystemContextMenuItemLookUp: Creates an instance of IOSSystemContextMenuItem for the system's built-in look up button.
IOSSystemContextMenuItemPaste: Creates an instance of IOSSystemContextMenuItem for the system's built-in paste button.
IOSSystemContextMenuItemSearchWeb: Creates an instance of IOSSystemContextMenuItem for the system's built-in search web button.
IOSSystemContextMenuItemSelectAll: Creates an instance of IOSSystemContextMenuItem for the system's built-in select all button.
IOSSystemContextMenuItemShare: Creates an instance of IOSSystemContextMenuItem for the system's built-in share button.
IsoBinaryField: Internal: a binary ISO field.
IsoBinaryFieldPackager: Internal: packs a binary ISO field.
IsoBitMapField: Internal: the ISO bitmap field.
IsoBitMapPackager: Internal: packs the ISO bitmap.
IsoBitSet: A port of the subset of java.util.BitSet the ISO 8583 bitmap code uses.
IsoBuffer: A minimal port of java.nio.ByteBuffer covering exactly the operations the ISO 8583 packagers rely on, so the Dart codec can mirror the Java one operation for operation.
IsoComponent<T>: Anything that can sit in an IsoMsg field slot: a string field, a binary field, a bitmap, or a nested message.
IsoComponentPackagerBase<V extends Object>: Shared pack/unpack pipeline: pad, prefix the length, interpret.
IsoFieldPackager: Packs and unpacks one field of a message. The field table is a heterogeneous list of these, so the interface is deliberately not generic — it mirrors the raw ISOComponentPackager[] the Java uses.
IsoFrameReader: Reassembles length-prefixed frames from a byte stream that may split or merge them arbitrarily.
IsoInterpreter<T>: Turns a field value into bytes and back. T is String for character fields and Uint8List for binary ones.
IsoLink: Owns the link to the host: MACs the request, frames it, sends it, and parks until the matching response arrives.
IsoLinkEvents: Optional progress callbacks while a message is in flight (show "waiting for host…").
IsoMsg: An ISO 8583 message: a sorted map of field number to component, plus the link header, trailer and reject code the OSS transport attaches to it.
IsoMsgPackager: Walks the field table to turn an IsoMsg into bytes and back. Ported from ISOMsgBasePackager.
IsoMultiplexer: Matches responses to the requests that are waiting for them.
IsoPadder<T>: Pads a field value out to its fixed length before interpretation.
IsoPrefixer: Writes and reads the length that precedes a variable-length field.
IsoSecurityModule: The terminal's PIN entry device. Keys live inside it and never reach Dart — this package hands it bytes and takes back a MAC or an encrypted PIN block.
IsoSessionKey: One session key from a logon, with its check value.
IsoStringField: Internal: a text ISO field.
IsoStringFieldPackager: Internal: packs a text ISO field.
IsoTrace: A ring buffer of what actually happened on the wire.
IsoTraceEntry: One logged ISO message (for debugging).
IsoTransport: Carries framed bytes to and from the acquirer. Implemented with a socket on Android and desktop, a WebSocket relay on the web, or a fake in tests — the protocol layer never learns which.
IsoUtil: Byte/BCD/hex helpers ported from the Java ISOUtil, kept bug-for-bug so the two implementations produce identical bytes.
IterableProperty<T>: Property with an Iterable<T> value that can be displayed with different DiagnosticsTreeStyle for custom rendering.
JavaScriptAlertDialogRequest: Defines the parameters that support PlatformWebViewController.setOnJavaScriptAlertDialog.
JavaScriptConfirmDialogRequest: Defines the parameters that support PlatformWebViewController.setOnJavaScriptConfirmDialog.
JavaScriptConsoleMessage: Represents a console message written to the JavaScript console.
JavaScriptInvocationParams: Parameters for invoking an asynchronous JavaScript function.
JavaScriptMessage: A message that was sent by JavaScript code running in a WebView.
JavaScriptTextInputDialogRequest: Defines the parameters that support PlatformWebViewController.setOnJavaScriptTextInputDialog.
JsonCodec: A JsonCodec encodes JSON objects to strings and decodes strings to JSON objects.
JsonDecoder: This class parses JSON strings and builds the corresponding objects.
JsonEncoder: This class converts JSON objects to strings.
JSONMessageCodec: MessageCodec with UTF-8 encoded JSON messages.
JSONMethodCodec: MethodCodec with UTF-8 encoded JSON method calls and result envelopes.
JsonUtf8Encoder: Encoder that encodes a single object as a UTF-8 encoded JSON string.
KeepAlive: Mark a child as needing to stay alive even when it's in a lazy list that would otherwise remove it.
KeepAliveHandle: A Listenable which can be manually triggered.
KeepAliveNotification: Indicates that the subtree through which this notification bubbles must be kept alive even if it would normally be discarded as an optimization.
Key: A Key is an identifier for Widgets, Elements and SemanticsNodes.
KeyboardInsertedContent: A class representing rich content (such as a PNG image) inserted via the system input method.
KeyboardKey: A base class for all keyboard key types.
KeyboardListener: A widget that calls a callback whenever the user presses or releases a key on a keyboard.
KeyboardOptions: Options to configure how keyboard keys may be used to control the map
KeyData: Information about a key event.
KeyDownEvent: An event indicating that the user has pressed a key down on the keyboard.
KeyedSubtree: A widget that builds its child.
KeyEvent: Defines the interface for keyboard key events.
KeyEventManager: A singleton class that processes key messages from the platform and dispatches converted messages accordingly.
KeyHelper: Abstract class for window-specific key mappings.
KeyMessage: The assembled information converted from a native key message.
KeyRepeatEvent: An event indicating that the user has been holding a key on the keyboard and causing repeated events.
KeySet<T extends KeyboardKey>: A set of KeyboardKeys that can be used as the keys in a Map.
KeyUpEvent: An event indicating that the user has released a key on the keyboard.
LabeledGlobalKey<T extends State<StatefulWidget>>: A global key with a debugging label.
Latin1Codec: A Latin1Codec encodes strings to ISO Latin-1 (aka ISO-8859-1) bytes and decodes Latin-1 bytes to strings.
Latin1Decoder: This class converts Latin-1 bytes (lists of unsigned 8-bit integers) to a string.
Latin1Encoder: This class converts strings of only ISO Latin-1 characters to bytes.
LatLng: Coordinates in Degrees
LatLngBounds: Data structure representing rectangular bounding box constrained by its northwest and southeast corners
LatLngTween: A Tween object for LatLng. Used for AnimationController to handle animated changes of the MapCamera.
Layer: A composited layer.
LayerHandle<T extends Layer>: A handle to prevent a Layer's platform graphics resources from being disposed.
LayerHitResult<R extends Object>: Result emitted by hit notifiers (see LayerHitNotifier) when a hit is detected on an element (such as a Polyline) within the respective layer
LayerLink: An object that a LeaderLayer can register with.
LayoutBuilder: Builds a widget tree that can depend on the parent widget's size.
LayoutChangedNotification: Indicates that the layout of one of the descendants of the object receiving this notification has changed in some way, and that therefore any assumptions about that layout are no longer valid.
LayoutId: Metadata for identifying children in a CustomMultiChildLayout.
LazyStream<T>: A Stream wrapper that forwards to another Stream that's initialized lazily.
LeaderLayer: A composited layer that can be followed by a FollowerLayer.
LeafRenderObjectElement: An Element that uses a LeafRenderObjectWidget as its configuration.
LeafRenderObjectWidget: A superclass for RenderObjectWidgets that configure RenderObject subclasses that have no children.
LeastSquaresSolver: Uses the least-squares algorithm to fit a polynomial to a set of data.
LeftPadder: Internal: pads a field on the left.
LengthLimitingTextInputFormatter: A TextInputFormatter that prevents the insertion of more characters than allowed.
LengthUnit
LexicalFocusOrder: Can be given to a FocusTraversalOrder widget to use a String to assign a lexical order to a widget subtree that is using a OrderedTraversalPolicy to define the order in which widgets should be traversed with the keyboard.
LicenseEntry: A license that covers part of the application's software or assets, to show in an interface such as the LicensePage.
LicenseEntryWithLineBreaks: Variant of LicenseEntry for licenses that separate paragraphs with blank lines and that hard-wrap text within paragraphs.
LicensePage: A page that shows licenses for software used by the application.
LicenseParagraph: A string that represents one paragraph in a LicenseEntry.
LicenseRegistry: A registry for packages to add licenses to, so that they can be displayed together in an interface such as the LicensePage.
LimitedBox: A box that limits its size only when it's unconstrained.
LinearBorder: An OutlinedBorder like BoxBorder that allows one to define a rectangular (box) border in terms of zero to four LinearBorderEdges, each of which is rendered as a single line.
LinearBorderEdge: Defines the relative size and alignment of one LinearBorder edge.
LinearGradient: A 2D linear gradient.
LinearProgressIndicator: A Material Design linear progress indicator, also known as a progress bar.
LineBoundary: A TextBoundary subclass for locating closest line breaks to a given position.
LineMetrics: LineMetrics stores the measurements and statistics of a single line in the paragraph.
LineSplitter: A StreamTransformer that splits a String into individual lines.
Link: References to filesystem links.
LinuxOptions: The options for the Linux file picker.
ListBody: A widget that arranges its children sequentially along a given axis, forcing them to the dimension of the parent in the other axis.
ListBodyParentData: Parent data for use with RenderListBody.
Listenable: An object that maintains a list of listeners.
ListenableBuilder: A general-purpose widget for building a widget subtree when a Listenable changes.
Listener: A widget that calls callbacks in response to common pointer events.
ListTile: A single fixed-height row that typically contains some text as well as a leading or trailing icon.
ListTileTheme: An inherited widget that defines color and style parameters for ListTiles in this widget's subtree.
ListTileThemeData: Used with ListTileTheme to define default property values for descendant ListTile widgets, as well as classes that build ListTiles, like CheckboxListTile, RadioListTile, and SwitchListTile.
ListView: A scrollable list of widgets arranged linearly.
ListWheelChildBuilderDelegate: A delegate that supplies children for ListWheelScrollView using a builder callback.
ListWheelChildDelegate: A delegate that supplies children for ListWheelScrollView.
ListWheelChildListDelegate: A delegate that supplies children for ListWheelScrollView using an explicit list.
ListWheelChildLoopingListDelegate: A delegate that supplies infinite children for ListWheelScrollView by looping an explicit list.
ListWheelChildManager: A delegate used by RenderListWheelViewport to manage its children.
ListWheelElement: Element that supports building children lazily for ListWheelViewport.
ListWheelParentData: ParentData for use with RenderListWheelViewport.
ListWheelScrollView: A box in which children on a wheel can be scrolled.
ListWheelViewport: A viewport showing a subset of children on a wheel.
LiteralBinaryInterpreter: Binary data written as-is.
LiveText: Utility methods for interacting with the system's Live Text.
LiveTextInputStatusNotifier: A ValueNotifier whose value indicates whether the current device supports the Live Text (OCR) function.
LoanKeyTags: EA — loans, with EA.E0 installments.
Locale: An identifier used to select a user's language and formatting preferences.
LocaleStringAttribute: A string attribute that causes the assistive technologies, e.g. VoiceOver, to treat string as a certain language.
LocalHistoryEntry: An entry in the history of a LocalHistoryRoute.
Localizations: Defines the Locale for its child and the localized resources that the child depends on.
LocalizationsDelegate<T>: A factory for a set of localized resources of type T, to be loaded by a Localizations widget.
LocalizationsResolver: A helper class used to manage localization resolution.
LocalKey: A key that is not a GlobalKey.
LogicalKeyboardKey: A class with static values that describe the keys that are returned from RawKeyEvent.logicalKey.
LogicalKeySet: A set of LogicalKeyboardKeys that can be used as the keys in a map.
LogoSourceAttribution: An image attribution permanently displayed adjacent to the open/close icon of a RichAttributionWidget
LongPressDownDetails: Details for callbacks that use GestureLongPressDownCallback.
LongPressDraggable<T extends Object>: Makes its child draggable starting from long press.
LongPressEndDetails: Details for callbacks that use GestureLongPressEndCallback.
LongPressGestureRecognizer: Recognizes when the user has pressed down at the same location for a long period of time.
LongPressMoveUpdateDetails: Details for callbacks that use GestureLongPressMoveUpdateCallback.
LongPressSemanticsEvent: An event which triggers long press semantic feedback.
LongPressStartDetails: Details for callbacks that use GestureLongPressStartCallback.
LookupBoundary: A lookup boundary controls what entities are visible to descendants of the boundary via the static lookup methods provided by the boundary.
Lottie: A widget to display a loaded LottieComposition. The controller property allows to specify a custom AnimationController that will drive the animation. If controller is null, the animation will play automatically and the behavior could be adjusted with the properties animate, repeat and reverse.
LottieBuilder: A widget that displays a Lottie animation.
LottieCache
LottieComposition
LottieDelegates
LottieDrawable
LottieFontStyle
LottieImageAsset
LottieOptions
LottieProvider
MacComponent: Builds the MAC over the selected fields and writes it into field 64.
MacOSScrollViewFlingVelocityTracker: A VelocityTracker subclass that provides a close approximation of macOS scroll view's velocity estimation strategy.
Magnifier: A Material-styled magnifying glass.
MagnifierController: A controller for a magnifier.
MagnifierDecoration: The decorations to put around the loupe in a RawMagnifier.
MagnifierInfo: A data class that contains the geometry information of text layouts and selection gestures, used to position magnifiers.
MapCachingProvider: Provides tile caching facilities to TileProviders
MapCamera: Describes the view of a map. This includes the size/zoom/position/crs as well as the minimum/maximum zoom. This class is mostly immutable but has some fields that get calculated lazily, changes to the map view may occur via the MapController or user interactions which will result in a new MapCamera value.
MapController: Controller to programmatically interact with a FlutterMap.
MapControllerImpl: Implements MapController whilst exposing methods for internal use which should not be visible to the user (e.g. for setting the current camera). This controller is for internal use. All updates to the state should be done by calling methods of this class to ensure consistency.
MapEvent: Base event class which is emitted by MapController instance, the event is usually related to performed gesture on the map itself or it can be an event related to map configuration
MapEventDoubleTapZoom: Event which is fired when map is double tapped
MapEventDoubleTapZoomEnd: Event which is fired when animation for double tap gesture ends
MapEventDoubleTapZoomStart: Event which is fired when animation for double tap gesture is started
MapEventFlingAnimation: Event which is fired when animation started by fling gesture is in progress
MapEventFlingAnimationEnd: Event which is fired when animation started by fling gesture finished
MapEventFlingAnimationNotStarted: Emits when InteractiveFlags contains fling and there wasn't enough velocity to start fling animation
MapEventFlingAnimationStart: Event which is fired when fling gesture is detected
MapEventLongPress: Event which is fired when map is long-pressed
MapEventMove: Event which is fired when map is being moved.
MapEventMoveEnd: Event which is fired when dragging is finished
MapEventMoveStart: Event which is fired when dragging is started
MapEventNonRotatedSizeChange: Event that fires when the map widget changes size, e.g. when the app window gets changed in size.
MapEventRotate: Event which is fired when map is being rotated
MapEventRotateEnd: Event which is fired when rotate gesture has ended
MapEventRotateStart: Event which is fired when rotate gesture was started
MapEventScrollWheelZoom: Event which is fired when scroll wheel is used to zoom
MapEventSecondaryTap: Event which is fired when map is secondary tapped
MapEventTap: Event which is fired when map is tapped
MapEventWithMove: Base event class which is emitted by MapController instance and includes information about camera movement which are not partial (e.g start rotate, rotate, end rotate).
MapOptions: All options for the FlutterMap widget.
Marker: A container for a child widget located at a geographic coordinate point
MarkerLayer: A Marker layer for FlutterMap.
MaskFilter: A mask filter to apply to shapes as they are painted. A mask filter is a function that takes a bitmap of color pixels, and returns another bitmap of color pixels.
Material: A piece of material.
MaterialAccentColor: Defines a single accent color as well a swatch of four shades of the accent color.
MaterialApp: An application that uses Material Design.
MaterialBanner: A Material Design banner.
MaterialBannerTheme: An inherited widget that defines the configuration for MaterialBanners in this widget's subtree.
MaterialBannerThemeData: Defines the visual properties of MaterialBanner widgets.
MaterialBasedCupertinoThemeData: A CupertinoThemeData that defers unspecified theme attributes to an upstream Material ThemeData.
MaterialButton: A utility class for building Material buttons that depend on the ambient ButtonTheme and Theme.
MaterialColor: Defines a single color as well a color swatch with ten shades of the color.
MaterialGap: A class that represents a gap within MergeableMaterial.
MaterialInkController: An interface for creating InkSplashs and InkHighlights on a Material.
MaterialLocalizationAf: The translations for Afrikaans (af).
MaterialLocalizationAm: The translations for Amharic (am).
MaterialLocalizationAr: The translations for Arabic (ar).
MaterialLocalizationAs: The translations for Assamese (as).
MaterialLocalizationAz: The translations for Azerbaijani (az).
MaterialLocalizationBe: The translations for Belarusian (be).
MaterialLocalizationBg: The translations for Bulgarian (bg).
MaterialLocalizationBn: The translations for Bengali Bangla (bn).
MaterialLocalizationBo: The translations for Tibetan (bo).
MaterialLocalizationBs: The translations for Bosnian (bs).
MaterialLocalizationCa: The translations for Catalan Valencian (ca).
MaterialLocalizationCs: The translations for Czech (cs).
MaterialLocalizationCy: The translations for Welsh (cy).
MaterialLocalizationDa: The translations for Danish (da).
MaterialLocalizationDe: The translations for German (de).
MaterialLocalizationDeCh: The translations for German, as used in Switzerland (de_CH).
MaterialLocalizationEl: The translations for Modern Greek (el).
MaterialLocalizationEn: The translations for English (en).
MaterialLocalizationEnAu: The translations for English, as used in Australia (en_AU).
MaterialLocalizationEnCa: The translations for English, as used in Canada (en_CA).
MaterialLocalizationEnGb: The translations for English, as used in the United Kingdom (en_GB).
MaterialLocalizationEnIe: The translations for English, as used in Ireland (en_IE).
MaterialLocalizationEnIn: The translations for English, as used in India (en_IN).
MaterialLocalizationEnNz: The translations for English, as used in New Zealand (en_NZ).
MaterialLocalizationEnSg: The translations for English, as used in Singapore (en_SG).
MaterialLocalizationEnZa: The translations for English, as used in South Africa (en_ZA).
MaterialLocalizationEs: The translations for Spanish Castilian (es).
MaterialLocalizationEs419: The translations for Spanish Castilian, as used in Latin America and the Caribbean (es_419).
MaterialLocalizationEsAr: The translations for Spanish Castilian, as used in Argentina (es_AR).
MaterialLocalizationEsBo: The translations for Spanish Castilian, as used in Bolivia (es_BO).
MaterialLocalizationEsCl: The translations for Spanish Castilian, as used in Chile (es_CL).
MaterialLocalizationEsCo: The translations for Spanish Castilian, as used in Colombia (es_CO).
MaterialLocalizationEsCr: The translations for Spanish Castilian, as used in Costa Rica (es_CR).
MaterialLocalizationEsDo: The translations for Spanish Castilian, as used in the Dominican Republic (es_DO).
MaterialLocalizationEsEc: The translations for Spanish Castilian, as used in Ecuador (es_EC).
MaterialLocalizationEsGt: The translations for Spanish Castilian, as used in Guatemala (es_GT).
MaterialLocalizationEsHn: The translations for Spanish Castilian, as used in Honduras (es_HN).
MaterialLocalizationEsMx: The translations for Spanish Castilian, as used in Mexico (es_MX).
MaterialLocalizationEsNi: The translations for Spanish Castilian, as used in Nicaragua (es_NI).
MaterialLocalizationEsPa: The translations for Spanish Castilian, as used in Panama (es_PA).
MaterialLocalizationEsPe: The translations for Spanish Castilian, as used in Peru (es_PE).
MaterialLocalizationEsPr: The translations for Spanish Castilian, as used in Puerto Rico (es_PR).
MaterialLocalizationEsPy: The translations for Spanish Castilian, as used in Paraguay (es_PY).
MaterialLocalizationEsSv: The translations for Spanish Castilian, as used in El Salvador (es_SV).
MaterialLocalizationEsUs: The translations for Spanish Castilian, as used in the United States (es_US).
MaterialLocalizationEsUy: The translations for Spanish Castilian, as used in Uruguay (es_UY).
MaterialLocalizationEsVe: The translations for Spanish Castilian, as used in Venezuela (es_VE).
MaterialLocalizationEt: The translations for Estonian (et).
MaterialLocalizationEu: The translations for Basque (eu).
MaterialLocalizationFa: The translations for Persian (fa).
MaterialLocalizationFi: The translations for Finnish (fi).
MaterialLocalizationFil: The translations for Filipino Pilipino (fil).
MaterialLocalizationFr: The translations for French (fr).
MaterialLocalizationFrCa: The translations for French, as used in Canada (fr_CA).
MaterialLocalizationGa: The translations for Irish (ga).
MaterialLocalizationGl: The translations for Galician (gl).
MaterialLocalizationGsw: The translations for Swiss German Alemannic Alsatian (gsw).
MaterialLocalizationGu: The translations for Gujarati (gu).
MaterialLocalizationHe: The translations for Hebrew (he).
MaterialLocalizationHi: The translations for Hindi (hi).
MaterialLocalizationHr: The translations for Croatian (hr).
MaterialLocalizationHu: The translations for Hungarian (hu).
MaterialLocalizationHy: The translations for Armenian (hy).
MaterialLocalizationId: The translations for Indonesian (id).
MaterialLocalizationIs: The translations for Icelandic (is).
MaterialLocalizationIt: The translations for Italian (it).
MaterialLocalizationJa: The translations for Japanese (ja).
MaterialLocalizationKa: The translations for Georgian (ka).
MaterialLocalizationKk: The translations for Kazakh (kk).
MaterialLocalizationKm: The translations for Khmer Central Khmer (km).
MaterialLocalizationKn: The translations for Kannada (kn).
MaterialLocalizationKo: The translations for Korean (ko).
MaterialLocalizationKy: The translations for Kirghiz Kyrgyz (ky).
MaterialLocalizationLo: The translations for Lao (lo).
MaterialLocalizationLt: The translations for Lithuanian (lt).
MaterialLocalizationLv: The translations for Latvian (lv).
MaterialLocalizationMk: The translations for Macedonian (mk).
MaterialLocalizationMl: The translations for Malayalam (ml).
MaterialLocalizationMn: The translations for Mongolian (mn).
MaterialLocalizationMr: The translations for Marathi (mr).
MaterialLocalizationMs: The translations for Malay (ms).
MaterialLocalizationMy: The translations for Burmese (my).
MaterialLocalizationNb: The translations for Norwegian Bokmål (nb).
MaterialLocalizationNe: The translations for Nepali (ne).
MaterialLocalizationNl: The translations for Dutch Flemish (nl).
MaterialLocalizationNo: The translations for Norwegian (no).
MaterialLocalizationOr: The translations for Oriya (or).
MaterialLocalizationPa: The translations for Panjabi Punjabi (pa).
MaterialLocalizationPl: The translations for Polish (pl).
MaterialLocalizationPs: The translations for Pushto Pashto (ps).
MaterialLocalizationPt: The translations for Portuguese (pt).
MaterialLocalizationPtPt: The translations for Portuguese, as used in Portugal (pt_PT).
MaterialLocalizationRo: The translations for Romanian Moldavian Moldovan (ro).
MaterialLocalizationRu: The translations for Russian (ru).
MaterialLocalizations: Defines the localized resource values used by the Material widgets.
MaterialLocalizationSi: The translations for Sinhala Sinhalese (si).
MaterialLocalizationSk: The translations for Slovak (sk).
MaterialLocalizationSl: The translations for Slovenian (sl).
MaterialLocalizationSq: The translations for Albanian (sq).
MaterialLocalizationSr: The translations for Serbian (sr).
MaterialLocalizationSrCyrl: The translations for Serbian, using the Cyrillic script (sr_Cyrl).
MaterialLocalizationSrLatn: The translations for Serbian, using the Latin script (sr_Latn).
MaterialLocalizationSv: The translations for Swedish (sv).
MaterialLocalizationSw: The translations for Swahili (sw).
MaterialLocalizationTa: The translations for Tamil (ta).
MaterialLocalizationTe: The translations for Telugu (te).
MaterialLocalizationTh: The translations for Thai (th).
MaterialLocalizationTl: The translations for Tagalog (tl).
MaterialLocalizationTr: The translations for Turkish (tr).
MaterialLocalizationUg: The translations for Uighur Uyghur (ug).
MaterialLocalizationUk: The translations for Ukrainian (uk).
MaterialLocalizationUr: The translations for Urdu (ur).
MaterialLocalizationUz: The translations for Uzbek (uz).
MaterialLocalizationVi: The translations for Vietnamese (vi).
MaterialLocalizationZh: The translations for Chinese (zh).
MaterialLocalizationZhHans: The translations for Chinese, using the Han script (zh_Hans).
MaterialLocalizationZhHant: The translations for Chinese, using the Han script (zh_Hant).
MaterialLocalizationZhHantHk: The translations for Chinese, as used in Hong Kong, using the Han script (zh_Hant_HK).
MaterialLocalizationZhHantTw: The translations for Chinese, as used in Taiwan, using the Han script (zh_Hant_TW).
MaterialLocalizationZu: The translations for Zulu (zu).
MaterialPage<T>: A page that creates a material style PageRoute.
MaterialPageRoute<T>: A modal route that replaces the entire screen with a platform-adaptive transition.
MaterialPointArcTween: A Tween that interpolates an Offset along a circular arc.
MaterialRectArcTween: A Tween that interpolates a Rect by having its opposite corners follow circular arcs.
MaterialRectCenterArcTween: A Tween that interpolates a Rect by moving it along a circular arc from begin's Rect.center to end's Rect.center while interpolating the rectangle's width and height.
MaterialScrollBehavior: Describes how Scrollable widgets behave for MaterialApps.
MaterialSlice: A class that can be used as a child to MergeableMaterial. It is a slice of Material that animates merging with other slices.
MaterialStateOutlineInputBorder: Defines a OutlineInputBorder that is also a MaterialStateProperty.
MaterialStateUnderlineInputBorder: Defines a UnderlineInputBorder that is also a MaterialStateProperty.
MaterialTextSelectionControls: Android Material styled text selection controls.
MaterialTextSelectionHandleControls: Android Material styled text selection handle controls.
Matrix4: 4D Matrix. Values are stored in column major order.
Matrix4Tween: An interpolation between two Matrix4s.
MatrixTransition: Animates the Matrix4 of a transformed widget.
MatrixUtils: Utility functions for working with matrices.
MaxColumnWidth: Sizes the column such that it is the size that is the maximum of two column width specifications.
MediaQuery: Establishes a subtree in which media queries resolve to the given data.
MediaQueryData: Information about a piece of media (e.g., a window).
MediaType: A class representing an HTTP media type, as used in Accept and Content-Type headers.
MemoryImage: Decodes the given Uint8List buffer as an image, associating it with the given scale.
MemoryLottie
MenuAcceleratorCallbackBinding: An InheritedWidget that provides a descendant MenuAcceleratorLabel with the function to invoke when the accelerator is pressed.
MenuAcceleratorLabel: A widget that draws the label text for a menu item (typically a MenuItemButton or SubmenuButton) and renders its child with information about the currently active keyboard accelerator.
MenuAnchor: A widget used to mark the "anchor" for a set of submenus, defining the rectangle used to position the menu, which can be done either with an explicit location, or with an alignment.
MenuBar: A menu bar that manages cascading child menus.
MenuBarTheme: An inherited widget that defines the configuration for the MenuBar widgets in this widget's descendants.
MenuBarThemeData: A data class that MenuBarTheme uses to define the visual properties of MenuBar widgets.
MenuButtonTheme: Overrides the default ButtonStyle of its MenuItemButton and SubmenuButton descendants.
MenuButtonThemeData: A ButtonStyle theme that overrides the default appearance of SubmenuButtons and MenuItemButtons.
MenuController: A controller used to manage a menu created by a subclass of RawMenuAnchor, such as MenuAnchor, MenuBar, SubmenuButton.
MenuItemButton: A button for use in a MenuBar, in a menu created with MenuAnchor, or on its own, that can be activated by click or keyboard navigation.
MenuStyle: The visual properties that menus have in common.
MenuTheme: An inherited widget that defines the configuration in this widget's descendants for menus created by the SubmenuButton, MenuBar, or MenuAnchor widgets.
MenuThemeData: Defines the configuration of the submenus created by the SubmenuButton, MenuBar, or MenuAnchor widgets.
MergeableMaterial: Displays a list of MergeableMaterialItem children. The list contains MaterialSlice items whose boundaries are either "merged" with adjacent items or separated by a MaterialGap. The children are distributed along the given mainAxis in the same way as the children of a ListBody. When the list of children changes, gaps are automatically animated open or closed as needed.
MergeableMaterialItem: The base type for MaterialSlice and MaterialGap.
MergeSemantics: A widget that merges the semantics of its descendants.
MessageCodec<T>: A message encoding/decoding mechanism.
MessageProperty: Debugging message displayed like a property.
MetaData: Holds opaque meta data in the render tree.
MethodCall: A command object representing the invocation of a named method.
MethodChannel: A named channel for communicating with platform plugins using asynchronous method calls.
MethodChannelFilePicker: An implementation of FilePickerPlatform that uses method channels.
MethodCodec: A codec for method calls and enveloped results.
MinColumnWidth: Sizes the column such that it is the size that is the minimum of two column width specifications.
MobileLayerTransformer: Transforms a child widget tree into a layer that can move and rotate based on the MapCamera
ModalBarrier: A widget that prevents the user from interacting with widgets behind itself.
ModalBottomSheetRoute<T>: A route that represents a Material Design modal bottom sheet.
ModalRoute<T>: A route that blocks interaction with previous routes.
MouseCursor: An interface for mouse cursor definitions.
MouseCursorManager: Maintains the state of mouse cursors and manages how cursors are searched for.
MouseCursorSession: Manages the duration that a pointing device should display a specific mouse cursor.
MouseRegion: A widget that tracks the movement of mice.
MouseTracker: Tracks the relationship between mouse devices and annotations, and triggers mouse events and cursor changes accordingly.
MouseTrackerAnnotation: The annotation object used to annotate regions that are interested in mouse movements.
MultiChildLayoutDelegate: A delegate that controls the layout of multiple children.
MultiChildLayoutParentData: ParentData used by RenderCustomMultiChildLayoutBox.
MultiChildRenderObjectElement: An Element that uses a MultiChildRenderObjectWidget as its configuration.
MultiChildRenderObjectWidget: A superclass for RenderObjectWidgets that configure RenderObject subclasses that have a single list of children. (This superclass only provides the storage for that child list, it doesn't actually provide the updating logic.)
MultiDragGestureRecognizer: Recognizes movement on a per-pointer basis.
MultiDragPointerState: Per-pointer state for a MultiDragGestureRecognizer.
MultiFingerGesture: Use MultiFingerGesture to disable / enable certain gestures Use MultiFingerGesture.all to enable all gestures, use MultiFingerGesture.none to disable all gestures
MultiFrameImageStreamCompleter: Manages the decoding and scheduling of image frames.
MultipartFile: A file to be uploaded as part of a MultipartRequest.
MultipartRequest: A multipart/form-data request.
MultiSelectableSelectionContainerDelegate: A delegate that handles events and updates for multiple Selectable children.
MultiStreamController<T>: An enhanced stream controller provided by Stream.multi.
MultiTapGestureRecognizer: Recognizes taps on a per-pointer basis.
MutableRectangle<T extends num>: A class for representing two-dimensional axis-aligned rectangles with mutable properties.
NavigationBar: Material 3 Navigation Bar component.
NavigationBarTheme: An inherited widget that defines visual properties for NavigationBars and NavigationDestinations in this widget's subtree.
NavigationBarThemeData: Defines default property values for descendant NavigationBar widgets.
NavigationDelegate: Callbacks for accepting or rejecting navigation changes, and for tracking the progress of navigation requests.
NavigationDestination: A Material 3 NavigationBar destination.
NavigationDrawer: Material Design Navigation Drawer component.
NavigationDrawerDestination: A Material Design NavigationDrawer destination.
NavigationDrawerTheme: An inherited widget that defines visual properties for NavigationDrawers and NavigationDestinations in this widget's subtree.
NavigationDrawerThemeData: Defines default property values for descendant NavigationDrawer widgets.
NavigationIndicator: Selection Indicator for the Material 3 NavigationBar and NavigationRail components.
NavigationNotification: A notification that a change in navigation has taken place.
NavigationRail: A Material Design widget that is meant to be displayed at the left or right of an app to navigate between a small number of views, typically between three and five.
NavigationRailDestination: Defines a NavigationRail button that represents one "destination" view.
NavigationRailTheme: An inherited widget that defines visual properties for NavigationRails and NavigationRailDestinations in this widget's subtree.
NavigationRailThemeData: Defines default property values for descendant NavigationRail widgets.
NavigationRequest: Defines the parameters of the pending navigation callback.
NavigationToolbar: NavigationToolbar is a layout helper to position 3 widgets or groups of widgets along a horizontal axis that's sensible for an application's navigation bar such as in Material Design and in iOS.
Navigator: A widget that manages a set of child widgets with a stack discipline.
NavigatorObserver: An interface for observing the behavior of a Navigator.
NavigatorPopHandler<T>: Enables the handling of system back gestures.
NavigatorState: The state for a Navigator widget.
NestedScrollView: A scrolling view inside of which can be nested other scrolling views, with their scroll positions being intrinsically linked.
NestedScrollViewState: The State for a NestedScrollView.
NestedScrollViewViewport: The Viewport variant used by NestedScrollView.
NetworkAssetBundle: An AssetBundle that loads resources over the network.
NetworkImage: Fetches the given URL from the network, associating it with the given scale.
NetworkInterface: A NetworkInterface represents an active network interface on the current system. It contains a list of InterfaceAddresses that are bound to the interface.
NetworkLottie
NetworkTileProvider: TileProvider to fetch tiles from the network.
NeverScrollableScrollPhysics: Scroll physics that does not allow the user to scroll.
NextFocusAction: An Action that moves the focus to the next focusable node in the focus order.
NextFocusIntent: An Intent bound to NextFocusAction, which moves the focus to the next focusable node in the focus traversal order.
NoSplash: An InteractiveInkFeature that doesn't paint a splash.
NotchedShape: A shape with a notch in its outline.
Notification: A notification that can bubble up the widget tree.
NotificationListener<T extends Notification>: A widget that listens for Notifications bubbling up the tree.
NullStreamSink<T>: A StreamSink that discards all events.
NumericFocusOrder: Can be given to a FocusTraversalOrder widget to assign a numerical order to a widget subtree that is using a OrderedTraversalPolicy to define the order in which widgets should be traversed with the keyboard.
ObjectCreated: An event that describes creation of an object.
ObjectDisposed: An event that describes disposal of an object.
ObjectEvent: A lifecycle event of an object.
ObjectFlagProperty<T>: A property where the important diagnostic information is primarily whether the value is present (non-null) or absent (null), rather than the actual value of the property itself.
ObjectKey: A key that takes its identity from the object used as its value.
ObserverList<T>: A list optimized for the observer pattern when there are small numbers of observers.
OfflineOrTmsTxnKeyTags: E5 — offline and TMS transactions: file transfer, notify, my goods.
OffscreenWebViewSession: Owns a WebViewController used without a WebViewWidget.
Offset: An immutable 2D floating-point offset.
OffsetLayer: A layer that is displayed at an offset from its parent layer.
OffsetPair: A container for a local and global Offset pair.
Offstage: A widget that lays the child out as if it was in the tree, but without painting anything, without making the child available for hit testing, and without taking any room in the parent.
OneFrameImageStreamCompleter: Manages the loading of dart:ui.Image objects for static ImageStreams (those with only one frame).
OneSequenceGestureRecognizer: Base class for gesture recognizers that can only recognize one gesture at a time. For example, a single TapGestureRecognizer can never recognize two taps happening simultaneously, even if multiple pointers are placed on the same widget.
Opacity: A widget that makes its child partially transparent.
OpacityLayer: A composited layer that makes its children partially transparent.
OpenUpwardsPageTransitionsBuilder: A page transition builder that animates incoming pages by revealing them from bottom to top with a clipping effect.
OptionalMethodChannel: A MethodChannel that ignores missing platform plugins.
OrderedTraversalPolicy: A FocusTraversalPolicy that orders nodes by an explicit order that resides in the nearest FocusTraversalOrder widget ancestor.
OrderKeyTags: E4 — a basket order, with E4.E0 good items.
OrdinalSortKey: A SemanticsSortKey that sorts based on the double value it is given.
OrientationBuilder: Builds a widget tree that can depend on the parent widget's orientation (distinct from the device orientation).
OssAcqHeader: The 19-byte OSS link header that precedes every ISO message on the wire.
OssAcqPackager: The OSS acquirer field table, field for field from OSSACQPackager.
OssAcqTlvPackager: The tag dictionary for ISO field 63 and the pack/unpack entry points.
OssFrameCodec: Turns a message into the bytes that go on the wire and back.
OutlinedBorder: A ShapeBorder that draws an outline with the width and color specified by side.
OutlinedButton: A Material Design "Outlined Button"; essentially a TextButton with an outlined border.
OutlinedButtonTheme: Overrides the default ButtonStyle of its OutlinedButton descendants.
OutlinedButtonThemeData: A ButtonStyle that overrides the default appearance of OutlinedButtons when it's used with OutlinedButtonTheme or with the overall Theme's ThemeData.outlinedButtonTheme.
OutlineInputBorder: Draws a rounded rectangle around an InputDecorator's container.
OvalBorder: A border that fits an elliptical shape.
OverflowBar: A widget that lays out its children in a row unless they "overflow" the available horizontal space, in which case it lays them out in a column instead.
OverflowBox: A widget that imposes different constraints on its child than it gets from its parent, possibly allowing the child to overflow the parent.
Overlay: A stack of entries that can be managed independently.
OverlayEntry: A place in an Overlay that can contain a widget.
OverlayImage: Unrotated overlay image that spans between a given bounding box.
OverlayImageLayer: OverlayImageLayer is used to display one or multiple images on the map.
OverlayPortal: A widget that renders its overlay child on an Overlay.
OverlayPortalController: A class to show, hide and bring to top an OverlayPortal's overlay child in the target Overlay.
OverlayRoute<T>: A route that displays widgets in the Navigator's Overlay.
OverlayState: The current state of an Overlay.
OverScrollHeaderStretchConfiguration: Specifies how a stretched header is to trigger an AsyncCallback.
OverscrollIndicatorNotification: A notification that either a GlowingOverscrollIndicator or a StretchingOverscrollIndicator will start showing an overscroll indication.
OverscrollNotification: A notification that a Scrollable widget has not changed its scroll position because the change would have caused its scroll position to go outside of its scroll bounds.
Padding: A widget that insets its child by the given padding.
PaddleRangeSliderValueIndicatorShape: A variant shape of a RangeSlider's value indicators. The value indicator is in the shape of an upside-down pear.
PaddleSliderValueIndicatorShape: A variant shape of a Slider's value indicator . The value indicator is in the shape of an upside-down pear.
Page<T>: Describes the configuration of a Route.
PageController: A controller for PageView.
PageMetrics: Metrics for a PageView.
PageRoute<T>: A modal route that replaces the entire screen.
PageRouteBuilder<T>: A utility class for defining one-off page routes in terms of callbacks.
PageScrollPhysics: Scroll physics used by a PageView.
PageStorage: Establish a subtree in which widgets can opt into persisting states after being destroyed.
PageStorageBucket: A storage bucket associated with a page in an app.
PageStorageKey<T>: A Key that can be used to persist the widget state in storage after the destruction and will be restored when recreated.
PageTransitionsBuilder: Defines a page transition animation for a PageRoute.
PageTransitionsTheme: Defines the page transition animations used by MaterialPageRoute for different TargetPlatforms.
PageView: A scrollable list that works page by page.
PaginatedDataTable: A table that follows the Material 2 design specification, using multiple pages to display data.
PaginatedDataTableState: Holds the state of a PaginatedDataTable.
Paint: A description of the style to use when drawing on a Canvas.
PaintingContext: A place to paint.
PanGestureRecognizer: Recognizes movement both horizontally and vertically.
PanUtil: PAN handling ported from the Java PanUtil.
ParagraphBoundary: A text boundary that uses paragraphs as logical boundaries.
ParametricCurve<T>: An abstract class providing an interface for evaluating a parametric curve.
ParentData: Base class for data associated with a RenderObject by its parent.
ParentDataElement<T extends ParentData>: An Element that uses a ParentDataWidget as its configuration.
ParentDataWidget<T extends ParentData>: Base class for widgets that hook ParentData information to children of RenderObjectWidgets.
PartialStackFrame: Partial information from a stack frame for stack filtering purposes.
PasteTextIntent: An Intent to paste text from Clipboard to the field.
Path: A complex, one-dimensional subset of a plane.
PercentProperty: Property which clamps a double to between 0 and 1 and formats it as a percentage.
PerformanceOverlay: Displays performance statistics.
PerformanceOverlayLayer: A layer that indicates to the compositor that it should display certain performance statistics within it.
PersistentBottomSheetController: A ScaffoldFeatureController for standard bottom sheets.
PersistentHashMap<K extends Object, V>: A collection of key/value pairs which provides efficient retrieval of value by key.
PersistentHeaderShowOnScreenConfiguration: Specifies how a pinned header or a floating header should react to RenderObject.showOnScreen calls.
PhysicalKeyboardKey: A class with static values that describe the keys that are returned from RawKeyEvent.physicalKey.
PhysicalModel: A widget representing a physical layer that clips its children to a shape.
PhysicalShape: A widget representing a physical layer that clips its children to a path.
PictureInfo: The decoded result of a vector graphics asset.
PictureLayer: A composited layer containing a ui.Picture.
PictureProvider: Deprecated class, will be removed, does not do anything.
PinCancelled: PIN pad event: cancelled.
PinConfirmed: PIN pad event: the PIN was confirmed.
PinDigitEntered: PIN pad event: a digit was pressed.
PinFailed: PIN pad event: failed.
PinInputEvent: What the PED reports while the cardholder is typing.
PinnedHeaderSliver: A sliver that keeps its Widget child at the top of the a CustomScrollView.
PinTimedOut: PIN pad event: timed out.
Pipe: An anonymous pipe that can be used to send data in a single direction i.e. data written to write can be read using read.
PipelineManifold: Manages a tree of PipelineOwners.
PipelineOwner: The pipeline owner manages the rendering pipeline.
Placeholder: A widget that draws a box that represents where other widgets will one day be added.
PlaceholderDimensions: Holds the Size and baseline required to represent the dimensions of a placeholder in text.
PlaceholderSpan: An immutable placeholder that is embedded inline within text.
PlaceholderSpanIndexSemanticsTag: Used by the RenderParagraph to map its rendering children to their corresponding semantics nodes.
Platform: Information about the environment in which the current program is running.
PlatformAdaptiveIcons: A set of platform-adaptive Material Design icons.
PlatformAssetBundle: An AssetBundle that loads resources using platform messages.
PlatformDispatcher: Platform event dispatcher singleton.
PlatformFile: The abstract representation of a picked file on the current platform.
PlatformMenu: A class for representing menu items that have child submenus.
PlatformMenuBar: A menu bar that uses the platform's native APIs to construct and render a menu described by a PlatformMenu/PlatformMenuItem hierarchy.
PlatformMenuDelegate: An abstract delegate class that can be used to set WidgetsBinding.platformMenuDelegate to provide for managing platform menus.
PlatformMenuItem: A class for PlatformMenuItems that do not have submenus (as a PlatformMenu would), but can be selected.
PlatformMenuItemGroup: A class that groups other menu items into sections delineated by dividers.
PlatformNavigationDelegateCreationParams: Object specifying creation parameters for creating a PlatformNavigationDelegate.
PlatformProvidedMenuItem: A class that represents a menu item that is provided by the platform.
PlatformRouteInformationProvider: The route information provider that propagates the platform route information changes.
PlatformSelectableRegionContextMenu: A widget that provides native selection context menu for its child subtree.
PlatformViewController: An interface for controlling a single platform view.
PlatformViewCreationParams: The parameters used to create a PlatformViewController.
PlatformViewLayer: A layer that shows an embedded UIView on iOS.
PlatformViewLink: Links a platform view with the Flutter framework.
PlatformViewRenderBox: A render object for embedding a platform view.
PlatformViewsRegistry: A registry responsible for generating unique identifier for platform views.
PlatformViewsService: Provides access to the platform views service.
PlatformViewSurface: Integrates a platform view with Flutter's compositor, touch, and semantics subsystems.
PlatformWebViewControllerCreationParams: Object specifying creation parameters for creating a PlatformWebViewController.
PlatformWebViewCookieManagerCreationParams: Object specifying creation parameters for creating a PlatformWebViewCookieManager.
PlatformWebViewDataManagerCreationParams: Creation parameters for a platform WebView data manager.
PlatformWebViewPermissionRequest: Permissions request when web content requests access to protected resources.
PlatformWebViewWidgetCreationParams: Object specifying creation parameters for creating a WebViewWidgetDelegate.
Point<T extends num>: A utility class for representing two-dimensional positions.
PointerAddedEvent: The device has started tracking the pointer.
PointerCancelEvent: The input from the pointer is no longer directed towards this receiver.
PointerData: Information about the state of a pointer.
PointerDownEvent: The pointer has made contact with the device.
PointerEnterEvent: The pointer has moved with respect to the device while the pointer is or is not in contact with the device, and it has entered a target object.
PointerEvent: Base class for touch, stylus, or mouse events.
PointerEventConverter: Converts from engine pointer data to framework pointer events.
PointerEventResampler: Class for pointer event resampling.
PointerExitEvent: The pointer has moved with respect to the device while the pointer is or is not in contact with the device, and exited a target object.
PointerHoverEvent: The pointer has moved with respect to the device while the pointer is not in contact with the device.
PointerMoveEvent: The pointer has moved with respect to the device while the pointer is in contact with the device.
PointerPanZoomEndEvent: The pan/zoom on this pointer has ended.
PointerPanZoomStartEvent: A pan/zoom has begun on this pointer.
PointerPanZoomUpdateEvent: The active pan/zoom on this pointer has updated.
PointerRemovedEvent: The device is no longer tracking the pointer.
PointerRouter: A routing table for PointerEvent events.
PointerScaleEvent: The pointer issued a scale event.
PointerScrollEvent: The pointer issued a scroll event.
PointerScrollInertiaCancelEvent: The pointer issued a scroll-inertia cancel event.
PointerSignalEvent: An event that corresponds to a discrete pointer signal.
PointerSignalResolver: Mediates disputes over which listener should handle pointer signal events when multiple listeners wish to handle those events.
PointerUpEvent: The pointer has stopped making contact with the device.
Polygon<R extends Object>: Polygon class, to be used for the PolygonLayer.
PolygonLabelPlacementCalculator: Calculates the position of a Polygon.label within its Polygon in geographic (lat/lng) space
PolygonLayer<R extends Object>: A polygon layer for FlutterMap.
PolylabelCalculator: Places the Polygon.label at the point furthest away from the outline, calculated using a Dart implementation of Mapbox's 'polylabel' algorithm
Polyline<R extends Object>: Polyline (aka. LineString) class, to be used for the PolylineLayer.
PolylineLayer<R extends Object>: A Polyline (aka. LineString) layer for FlutterMap.
PolynomialFit: An nth degree polynomial fit to a dataset.
PopEntry<T>: Allows listening to and preventing pops.
PopScope<T>: Manages back navigation gestures.
PopupMenuButton<T>: Displays a menu when pressed and calls onSelected when the menu is dismissed because an item was selected. The value passed to onSelected is the value of the selected menu item.
PopupMenuButtonState<T>: The State for a PopupMenuButton.
PopupMenuDivider: A horizontal divider in a Material Design popup menu.
PopupMenuEntry<T>: A base class for entries in a Material Design popup menu.
PopupMenuItem<T>: An item in a Material Design popup menu.
PopupMenuItemState<T, W extends PopupMenuItem<T>>: The State for PopupMenuItem subclasses.
PopupMenuTheme: An inherited widget that defines the configuration for popup menus in this widget's subtree.
PopupMenuThemeData: Defines the visual properties of the routes used to display popup menus as well as PopupMenuItem and PopupMenuDivider widgets.
PopupRoute<T>: A modal route that overlays a widget over the current route.
Positioned: A widget that controls where a child of a Stack is positioned.
PositionedDirectional: A widget that controls where a child of a Stack is positioned without committing to a specific TextDirection.
PositionedGestureDetails: An abstract interface representing gesture details that include positional information.
PositionedTapController
PositionedTapDetector2
PositionedTransition: Animated version of Positioned which takes a specific Animation<RelativeRect> to transition the child's position from a start position to an end position over the lifetime of the animation.
PredictiveBackEvent: Object used to report back gesture progress in Android.
PredictiveBackFullscreenPageTransitionsBuilder: Used by PageTransitionsTheme to define a MaterialPageRoute page transition animation that looks like Android's Full Screen page transition.
PredictiveBackPageTransitionsBuilder: Used by PageTransitionsTheme to define a MaterialPageRoute page transition animation that looks like the default page transition used on Android U and above when using predictive back.
PredictiveBackRoute: An interface for a route that supports predictive back gestures.
PreferredSize: A widget with a preferred size.
PreferredSizeWidget: An interface for widgets that can return the size this widget would prefer if it were otherwise unconstrained.
PreviousFocusAction: An Action that moves the focus to the previous focusable node in the focus order.
PreviousFocusIntent: An Intent bound to PreviousFocusAction, which moves the focus to the previous focusable node in the focus traversal order.
PrimaryPointerGestureRecognizer: A base class for gesture recognizers that track a single primary pointer.
PrimaryScrollController: Associates a ScrollController with a subtree.
PrimitiveTags: Top-level TLV tags carried in ISO field 63.
PrioritizedAction: An Action that iterates through a list of Intents, invoking the first that is enabled.
PrioritizedIntents: An Intent that evaluates a series of specified orderedIntents for execution.
Process: The means to execute a program.
ProcessInfo: Methods for retrieving information about the current process.
ProcessResult: The result of running a non-interactive process started with Process.run or Process.runSync.
ProcessSignal: On Posix systems, ProcessSignal is used to send a specific signal to a child process, see Process.kill.
ProcessStartMode: Modes for running a new process.
ProcessTextAction: A data structure describing text processing actions.
ProcessTextService: Determines how to interact with the text processing feature.
ProgressIndicator: A base class for Material Design progress indicators.
ProgressIndicatorTheme: An inherited widget that defines the configuration for ProgressIndicators in this widget's subtree.
ProgressIndicatorThemeData: Overrides the default values of visual properties for descendant ProgressIndicator widgets.
Proj4Crs: Custom CRS
Projection: The abstract base Projection class, used for coordinate reference systems like Epsg3857. Inherit from this class if you want to create or implement your own CRS.
ProxyAnimation: An animation that is a proxy for another animation.
ProxyElement: An Element that uses a ProxyWidget as its configuration.
ProxyWidget: A widget that has a child widget provided to it, instead of building a new widget.
RadialGradient: A 2D radial gradient.
Radio<T>: A Material Design radio button.
RadioGroup<T>: A group for radios.
RadioGroupRegistry<T>: An abstract interface for registering a group of radios.
RadioListTile<T>: A ListTile with a Radio. In other words, a radio button with a label.
RadioMenuButton<T>: A menu item that combines a Radio widget with a MenuItemButton.
RadioTheme: Applies a radio theme to descendant Radio widgets.
RadioThemeData: Defines default property values for descendant Radio widgets.
Radius: A radius for either circular or elliptical shapes.
Random: A generator of random bool, int, or double values.
RandomAccessFile: Random access to the data in a file.
RangeLabels: Object for setting range slider label values that appear in the value indicator for each thumb.
RangeMaintainingScrollPhysics: Scroll physics that attempt to keep the scroll position in range when the contents change dimensions suddenly.
RangeSlider: A Material Design range slider.
RangeSliderThumbShape: Base class for RangeSlider thumb shapes.
RangeSliderTickMarkShape: Base class for RangeSlider tick mark shapes.
RangeSliderTrackShape: Base class for RangeSlider track shapes.
RangeSliderValueIndicatorShape: Base class for RangeSlider value indicator shapes.
RangeValues: Object for representing range slider thumb values.
RawAutocomplete<T extends Object>: A widget for helping the user make a selection by entering some text and choosing from among a list of options.
RawChip: A raw Material Design chip.
RawDatagramSocket: An unbuffered interface to a UDP socket.
RawDialogRoute<T>: A general dialog route which allows for customization of the dialog popup.
RawFloatingCursorPoint: The current state and position of the floating cursor.
RawGestureDetector: A widget that detects gestures described by the given gesture factories.
RawGestureDetectorState: State for a RawGestureDetector.
RawImage: A widget that displays a dart:ui.Image directly.
RawKeyboard: An interface for listening to raw key events.
RawKeyboardListener: A widget that calls a callback whenever the user presses or releases a key on a keyboard.
RawKeyDownEvent: The user has pressed a key on the keyboard.
RawKeyEvent: Defines the interface for raw key events.
RawKeyEventData: Base class for platform-specific key event data.
RawKeyEventDataAndroid: Platform-specific key event data for Android.
RawKeyEventDataFuchsia: Platform-specific key event data for Fuchsia.
RawKeyEventDataIos: Platform-specific key event data for iOS.
RawKeyEventDataLinux: Platform-specific key event data for Linux.
RawKeyEventDataMacOs: Platform-specific key event data for macOS.
RawKeyEventDataWeb: Platform-specific key event data for Web.
RawKeyEventDataWindows: Platform-specific key event data for Windows.
RawKeyUpEvent: The user has released a key on the keyboard.
RawLottie: A widget that displays a LottieDrawable directly.
RawMagnifier: A common base class for magnifiers.
RawMaterialButton: Creates a button based on Semantics, Material, and InkWell widgets.
RawMenuAnchor: A widget that wraps a child and anchors a floating menu.
RawMenuAnchorGroup: Creates a menu anchor that is always visible and is not displayed in an OverlayPortal.
RawMenuOverlayInfo: Anchor and menu information passed to RawMenuAnchor.
RawRadio<T>: A Radio button that provides basic radio functionalities.
RawScrollbar: An extendable base class for building scrollbars that fade in and out.
RawScrollbarState<T extends RawScrollbar>: The state for a RawScrollbar widget, also shared by the Scrollbar and CupertinoScrollbar widgets.
RawSecureServerSocket: A server socket providing a stream of low-level RawSecureSockets.
RawSecureSocket: RawSecureSocket provides a secure (SSL or TLS) network connection.
RawServerSocket: A listening socket.
RawSocket: A TCP connection.
RawSocketEvent: Events for the RawDatagramSocket, RawSecureSocket, and RawSocket.
RawSocketOption: The RawSocketOption is used as a parameter to Socket.setRawOption and RawSocket.setRawOption to customize the behaviour of the underlying socket.
RawSynchronousSocket: A low-level class for communicating synchronously over a TCP socket.
RawTooltip: A widget that wraps a child to display an informative overlay in response to user interactions, such as hovering or long-pressing.
RawTooltipState: Contains the state for a RawTooltip.
RawView: The lower level workhorse widget for View that bootstraps a render tree for a view.
RawZLibFilter: The RawZLibFilter class provides a low-level interface to zlib.
ReadBuffer: Read-only buffer for reading sequentially from a ByteData instance.
ReadingOrderTraversalPolicy: Traverses the focus order in "reading order".
ReadPipe: The "read" end of an Pipe created by Pipe.create.
Rect: An immutable, 2D, axis-aligned, floating-point rectangle whose coordinates are relative to a given origin.
Rectangle<T extends num>: A class for representing two-dimensional rectangles whose properties are immutable.
RectangularRangeSliderTrackShape: A RangeSlider track that's a simple rectangle.
RectangularRangeSliderValueIndicatorShape: The default shape of a RangeSlider's value indicators.
RectangularSliderTrackShape: A Slider track that's a simple rectangle.
RectangularSliderValueIndicatorShape: The default shape of a Slider's value indicator.
RectTween: An interpolation between two rectangles.
RedirectInfo: Redirect information.
RedoTextIntent: An Intent that represents a user interaction that attempts to go back to the previous editing state.
RefreshIndicator: A widget that supports the Material "swipe to refresh" idiom.
RefreshIndicatorState: Contains the state for a RefreshIndicator. This class can be used to programmatically show the refresh indicator, see the show method.
RefreshProgressIndicator: An indicator for the progress of refreshing the contents of a widget.
RelativePositionedTransition: Animated version of Positioned which transitions the child's position based on the value of rect relative to a bounding box with the specified size.
RelativeRect: An immutable 2D, axis-aligned, floating-point rectangle whose coordinates are given relative to another rectangle's edges, known as the container. Since the dimensions of the rectangle are relative to those of the container, this class has no width and height members. To determine the width or height of the rectangle, convert it to a Rect using toRect() (passing the container's own Rect), and then examine that object.
RelativeRectTween: An interpolation between two relative rects.
RenderAbsorbPointer: A render object that absorbs pointers during hit testing.
RenderAbstractViewport: An interface for render objects that are bigger on the inside.
RenderAligningShiftedBox: Abstract class for one-child-layout render boxes that use a AlignmentGeometry to align their children.
RenderAndroidView: A render object for an Android view.
RenderAnimatedOpacity: Makes its child partially transparent, driven from an Animation.
RenderAnimatedSize: A render object that animates its size to its child's size over a given duration and with a given curve. If the child's size itself animates (i.e. if it changes size two frames in a row, as opposed to abruptly changing size in one frame then remaining that size in subsequent frames), this render object sizes itself to fit the child instead of animating itself.
RenderAnnotatedRegion<T extends Object>: Render object which inserts an AnnotatedRegionLayer into the layer tree.
RenderAppKitView: A render object for a macOS platform view.
RenderAspectRatio: Attempts to size the child to a specific aspect ratio.
RenderBackdropFilter: Applies a filter to the existing painted content and then paints child.
RenderBaseline: Shifts the child down such that the child's baseline (or the bottom of the child, if the child has no baseline) is baseline logical pixels below the top of this box, then sizes this box to contain the child.
RenderBlockSemantics: Causes the semantics of all earlier render objects below the same semantic boundary to be dropped.
RenderBox: A render object in a 2D Cartesian coordinate system.
RenderCache
RenderClipOval: Clips its child using an oval.
RenderClipPath: Clips its child using a path.
RenderClipRect: Clips its child using a rectangle.
RenderClipRRect: Clips its child using a rounded rectangle.
RenderClipRSuperellipse: Clips its child using a rounded superellipse.
RenderConstrainedBox: Imposes additional constraints on its child.
RenderConstrainedOverflowBox: A render object that imposes different constraints on its child than it gets from its parent, possibly allowing the child to overflow the parent.
RenderConstraintsTransformBox: A RenderBox that applies an arbitrary transform to its constraints, and sizes its child using the resulting BoxConstraints, optionally clipping, or treating the overflow as an error.
RenderCustomMultiChildLayoutBox: Defers the layout of multiple children to a delegate.
RenderCustomPaint: Provides a canvas on which to draw during the paint phase.
RenderCustomSingleChildLayoutBox: Defers the layout of its single child to a delegate.
RenderDarwinPlatformView<T extends DarwinPlatformViewController>: Common render-layer functionality for iOS and macOS platform views.
RenderDecoratedBox: Paints a Decoration either before or after its child paints.
RenderDecoratedSliver: Paints a Decoration either before or after its child paints.
RenderEditable: Displays some text in a scrollable container with a potentially blinking cursor and with gesture recognizers.
RenderEditablePainter: An interface that paints within a RenderEditable's bounds, above or beneath its text content.
RenderErrorBox: A render object used as a placeholder when an error occurs.
RenderExcludeSemantics: Excludes this subtree from the semantic tree.
RenderFittedBox: Scales and positions its child within itself according to fit.
RenderFlex: Displays its children in a one-dimensional array.
RenderFlow: Implements the flow layout algorithm.
RenderFollowerLayer: Transform the child so that its origin is offset from the origin of the RenderLeaderLayer with the same LayerLink.
RenderFractionallySizedOverflowBox: Sizes its child to a fraction of the total available space.
RenderFractionalTranslation: Applies a translation transformation before painting its child.
RenderIgnoreBaseline: Excludes the child from baseline computations in the parent.
RenderIgnorePointer: A render object that is invisible during hit testing.
RenderImage: An image in the render tree.
RenderIndexedSemantics: A render objects that annotates semantics with an index.
RenderIndexedStack: Implements the same layout algorithm as RenderStack but only paints the child specified by index.
RenderingFlutterBinding: A concrete binding for applications that use the Rendering framework directly. This is the glue that binds the framework to the Flutter engine.
RenderIntrinsicHeight: Sizes its child to the child's intrinsic height.
RenderIntrinsicWidth: Sizes its child to the child's maximum intrinsic width.
RenderLeaderLayer: Provides an anchor for a RenderFollowerLayer.
RenderLimitedBox: Constrains the child's BoxConstraints.maxWidth and BoxConstraints.maxHeight if they're otherwise unconstrained.
RenderListBody: Displays its children sequentially along a given axis, forcing them to the dimensions of the parent in the other axis.
RenderListWheelViewport: Render, onto a wheel, a bigger sequential set of objects inside this viewport.
RenderMergeSemantics: Causes the semantics of all descendants to be merged into this node such that the entire subtree becomes a single leaf in the semantics tree.
RenderMetaData: Holds opaque meta data in the render tree.
RenderMouseRegion: Calls callbacks in response to pointer events that are exclusive to mice.
RenderNestedScrollViewViewport: The RenderViewport variant used by NestedScrollView.
RenderObject: An object in the render tree.
RenderObjectElement: An Element that uses a RenderObjectWidget as its configuration.
RenderObjectToWidgetAdapter<T extends RenderObject>: A bridge from a RenderObject to an Element tree.
RenderObjectToWidgetElement<T extends RenderObject>: The root of an element tree that is hosted by a RenderObject.
RenderObjectWidget: RenderObjectWidgets provide the configuration for RenderObjectElements, which wrap RenderObjects, which provide the actual rendering of the application.
RenderOffstage: Lays the child out as if it was in the tree, but without painting anything, without making the child available for hit testing, and without taking any room in the parent.
RenderOpacity: Makes its child partially transparent.
RenderPadding: Insets its child by the given padding.
RenderParagraph: A render object that displays a paragraph of text.
RenderPerformanceOverlay: Displays performance statistics.
RenderPhysicalModel: Creates a physical model layer that clips its child to a rounded rectangle.
RenderPhysicalShape: Creates a physical shape layer that clips its child to a Path.
RenderPointerListener: Calls callbacks in response to common pointer events.
RenderPositionedBox: Positions its child using an AlignmentGeometry.
RenderProxyBox: A base class for render boxes that resemble their children.
RenderProxyBoxWithHitTestBehavior: A RenderProxyBox subclass that allows you to customize the hit-testing behavior.
RenderProxySliver: A base class for sliver render objects that resemble their children.
RenderRepaintBoundary: Creates a separate display list for its child.
RenderRotatedBox: Rotates its child by a integral number of quarter turns.
RenderSemanticsAnnotations: Add annotations to the SemanticsNode for this subtree.
RenderSemanticsGestureHandler: Listens for the specified gestures from the semantics server (e.g. an accessibility tool).
RenderShaderMask: Applies a mask generated by a Shader to its child.
RenderShiftedBox: Abstract class for one-child-layout render boxes that provide control over the child's position.
RenderShrinkWrappingViewport: A render object that is bigger on the inside and shrink wraps its children in the main axis.
RenderSizedOverflowBox: A render object that is a specific size but passes its original constraints through to its child, which it allows to overflow.
RenderSliver: Base class for the render objects that implement scroll effects in viewports.
RenderSliverAnimatedOpacity: Makes its sliver child partially transparent, driven from an Animation.
RenderSliverBoxChildManager: A delegate used by RenderSliverMultiBoxAdaptor to manage its children.
RenderSliverConstrainedCrossAxis: Applies a cross-axis constraint to its sliver child.
RenderSliverCrossAxisGroup: A sliver that places multiple sliver children in a linear array along the cross axis.
RenderSliverEdgeInsetsPadding: Insets a RenderSliver by applying resolvedPadding on each side.
RenderSliverFillRemaining: A sliver that contains a single box child that is non-scrollable and fills the remaining space in the viewport.
RenderSliverFillRemainingAndOverscroll: A sliver that contains a single box child that is non-scrollable and fills the remaining space in the viewport including any overscrolled area.
RenderSliverFillRemainingWithScrollable: A sliver that contains a single box child that contains a scrollable and fills the viewport.
RenderSliverFillViewport: A sliver that contains multiple box children that each fill the viewport.
RenderSliverFixedExtentBoxAdaptor: A sliver that contains multiple box children that have the explicit extent in the main axis.
RenderSliverFixedExtentList: A sliver that places multiple box children with the same main axis extent in a linear array.
RenderSliverFloatingPersistentHeader: A sliver with a RenderBox child which shrinks and scrolls like a RenderSliverScrollingPersistentHeader, but immediately comes back when the user scrolls in the reverse direction.
RenderSliverFloatingPinnedPersistentHeader: A sliver with a RenderBox child which shrinks and then remains pinned to the start of the viewport like a RenderSliverPinnedPersistentHeader, but immediately grows when the user scrolls in the reverse direction.
RenderSliverGrid: A sliver that places multiple box children in a two dimensional arrangement.
RenderSliverIgnorePointer: A render object that is invisible during hit testing.
RenderSliverList: A sliver that places multiple box children in a linear array along the main axis.
RenderSliverMainAxisGroup: A sliver that places multiple sliver children in a linear array along the main axis.
RenderSliverMultiBoxAdaptor: A sliver with multiple box children.
RenderSliverOffstage: Lays the sliver child out as if it was in the tree, but without painting anything, without making the sliver child available for hit testing, and without taking any room in the parent.
RenderSliverOpacity: Makes its sliver child partially transparent.
RenderSliverOverlapAbsorber: A sliver that wraps another, forcing its layout extent to be treated as overlap.
RenderSliverOverlapInjector: A sliver that has a sliver geometry based on the values stored in a SliverOverlapAbsorberHandle.
RenderSliverPadding: Insets a RenderSliver, applying padding on each side.
RenderSliverPersistentHeader: A base class for slivers that have a RenderBox child which scrolls normally, except that when it hits the leading edge (typically the top) of the viewport, it shrinks to a minimum size (minExtent).
RenderSliverPinnedPersistentHeader: A sliver with a RenderBox child which never scrolls off the viewport in the positive scroll direction, and which first scrolls on at a full size but then shrinks as the viewport continues to scroll.
RenderSliverScrollingPersistentHeader: A sliver with a RenderBox child which scrolls normally, except that when it hits the leading edge (typically the top) of the viewport, it shrinks to a minimum size before continuing to scroll.
RenderSliverSemanticsAnnotations: Add annotations to the SemanticsNode for this subtree.
RenderSliverSingleBoxAdapter: An abstract class for RenderSlivers that contains a single RenderBox.
RenderSliverToBoxAdapter: A RenderSliver that contains a single RenderBox.
RenderSliverVariedExtentList: A sliver that places multiple box children with the corresponding main axis extent in a linear array.
RenderStack: Implements the stack layout algorithm.
RenderTable: A table where the columns and rows are sized to fit the contents of the cells.
RenderTapRegion: A render object that defines a region that can detect taps inside or outside of itself and any group of regions it belongs to, without participating in the gesture disambiguation system.
RenderTapRegionSurface: A render object that provides notification of a tap inside or outside of a set of registered regions, without participating in the gesture disambiguation system (other than to consume tap down events if TapRegion.consumeOutsideTaps is true).
RenderTransform: Applies a transformation before painting its child.
RenderTranslucentPointer: A render object that is invisible to its parent during hit testing.
RenderTreeRootElement: A RenderObjectElement used to manage the root of a render tree.
RenderTreeSliver: A sliver that places multiple TreeSliverNodes in a linear array along the main access, while staggering nodes that are animating into and out of view.
RenderTwoDimensionalViewport: A base class for viewing render objects that scroll in two dimensions.
RenderUiKitView: A render object for an iOS UIKit UIView.
RenderView: The root of the render tree.
RenderViewport: A render object that is bigger on the inside.
RenderViewportBase<ParentDataClass extends ContainerParentDataMixin<RenderSliver>>: A base class for render objects that are bigger on the inside.
RenderWrap: Displays its children in multiple horizontal or vertical runs.
ReorderableDelayedDragStartListener: A wrapper widget that will recognize the start of a drag operation by looking for a long press event. Once it is recognized, it will start a drag operation on the wrapped item in the reorderable list.
ReorderableDragStartListener: A wrapper widget that will recognize the start of a drag on the wrapped widget by a PointerDownEvent, and immediately initiate dragging the wrapped item to a new location in a reorderable list.
ReorderableList: A scrolling container that allows the user to interactively reorder the list items.
ReorderableListState: The state for a list that allows the user to interactively reorder the list items.
ReorderableListView: A list whose items the user can interactively reorder by dragging.
RepaintBoundary: A widget that creates a separate display list for its child.
RepeatingAnimationBuilder<T extends Object>: Widget that animates an Animatable value and repeats indefinitely.
RepetitiveStackFrameFilter: A StackFilter that filters based on repeating lists of PartialStackFrames.
ReplaceTextIntent: An Intent that represents a user interaction that attempts to modify the current TextEditingValue in an input field.
ReportSaleTags: E7 — sale report totals, with E7.E0 per-good rows.
Request: An HTTP request where the entire request body is known in advance.
RequestFocusAction: An Action that requests the focus on the node it is given in its RequestFocusIntent.
RequestFocusIntent: An intent for use with the RequestFocusAction, which supplies the FocusNode that should be focused.
ResizeImage: Instructs Flutter to decode the image at the specified dimensions instead of at its native size.
ResizeImageKey: Key used internally by ResizeImage.
ResourceHandle: A wrapper around OS resource handle so it can be passed via Socket as part of SocketMessage.
Response: An HTTP response where the entire response body is known in advance.
RestartableTimer: A non-periodic timer that can be restarted any number of times.
RestorableBool: A RestorableProperty that knows how to store and restore a bool.
RestorableBoolN: A RestorableProperty that knows how to store and restore a bool that is nullable.
RestorableChangeNotifier<T extends ChangeNotifier>: A base class for creating a RestorableProperty that stores and restores a ChangeNotifier.
RestorableDateTime: A RestorableValue that knows how to save and restore DateTime.
RestorableDateTimeN: A RestorableValue that knows how to save and restore DateTime that is nullable.
RestorableDouble: A RestorableProperty that knows how to store and restore a double.
RestorableDoubleN: A RestorableProperty that knows how to store and restore a double that is nullable.
RestorableEnum<T extends Enum>: A RestorableProperty that knows how to store and restore an Enum type.
RestorableEnumN<T extends Enum>: A RestorableProperty that knows how to store and restore a nullable Enum type.
RestorableInt: A RestorableProperty that knows how to store and restore an int.
RestorableIntN: A RestorableProperty that knows how to store and restore an int that is nullable.
RestorableListenable<T extends Listenable>: A base class for creating a RestorableProperty that stores and restores a Listenable.
RestorableNum<T extends num>: A RestorableProperty that knows how to store and restore a num.
RestorableNumN<T extends num?>: A RestorableProperty that knows how to store and restore a num that is nullable.
RestorableProperty<T>: Manages an object of type T, whose value a State object wants to have restored during state restoration.
RestorableRouteFuture<T>: Gives access to a Route object and its return value that was added to a navigator via one of its "restorable" API methods.
RestorableString: A RestorableProperty that knows how to store and restore a String.
RestorableStringN: A RestorableProperty that knows how to store and restore a String that is nullable.
RestorableTextEditingController: A RestorableProperty that knows how to store and restore a TextEditingController.
RestorableTimeOfDay: A RestorableValue that knows how to save and restore TimeOfDay.
RestorableValue<T>: A RestorableProperty that makes the wrapped value accessible to the owning State object via the value getter and setter.
RestorationBucket: A RestorationBucket holds pieces of the restoration data that a part of the application needs to restore its state.
RestorationManager: Manages the restoration data in the framework and synchronizes it with the engine.
RestorationScope: Creates a new scope for restoration IDs used by descendant widgets to claim RestorationBuckets.
Result<T>: The result of a computation.
ResultFuture<T>: A Future wrapper that provides synchronous access to the result of the wrapped Future once it's completed.
RevealedOffset: Return value for RenderAbstractViewport.getOffsetToReveal.
ReverseAnimation: An animation that is the reverse of another animation.
ReverseTween<T extends Object?>: A Tween that evaluates its parent in reverse.
RichAttributionWidget: A prebuilt dynamic attribution layer that supports both logos and text through SourceAttributions
RichAttributionWidgetAnimation: Animation provider interface for a RichAttributionWidget
RichText: A paragraph of rich text.
RightPadder: Internal: pads a field on the right.
RightTruncatingPadder: Right padder that truncates instead of throwing when the value is too long.
RootBackButtonDispatcher: The default implementation of back button dispatcher for the root router.
RootElement: The root of the element tree.
RootIsolateToken: A token that represents a root isolate.
RootRenderObjectElement: Deprecated. Unused in the framework and will be removed in a future version of Flutter.
RootRestorationScope: Inserts a child bucket of RestorationManager.rootBucket into the widget tree and makes it available to descendants via RestorationScope.of.
RootWidget: A widget for the root of the widget tree.
RotatedBox: A widget that rotates its child by a integral number of quarter turns.
RotatedOverlayImage: Spans an image across three corner points.
RotationTransition: Animates the rotation of a widget.
RoundedRectangleBorder: A rectangular border with rounded corners.
RoundedRectRangeSliderTrackShape: The default shape of a RangeSlider's track.
RoundedRectRangeSliderValueIndicatorShape: The rounded rectangle shape of a RangeSlider's value indicators.
RoundedRectSliderTrackShape: The default shape of a Slider's track.
RoundedRectSliderValueIndicatorShape: The rounded rectangle shape of a Slider's value indicator.
RoundedSuperellipseBorder: A rectangular border with rounded corners following the shape of an RSuperellipse.
RoundRangeSliderThumbShape: The default shape of a RangeSlider's thumbs.
RoundRangeSliderTickMarkShape: The default shape of each RangeSlider tick mark.
RoundSliderOverlayShape: The default shape of a Slider's thumb overlay.
RoundSliderThumbShape: The default shape of a Slider's thumb.
RoundSliderTickMarkShape: The default shape of each Slider tick mark.
Route<T>: An abstraction for an entry managed by a Navigator.
RouteAware: An interface for objects that are aware of their current Route.
RouteInformation: A piece of routing information.
RouteInformationParser<T>: A delegate that is used by the Router widget to parse a route information into a configuration of type T.
RouteInformationProvider: A route information provider that provides route information for the Router widget
RouteObserver<R extends Route>: A Navigator observer that notifies RouteAwares of changes to the state of their Route.
Router<T>: The dispatcher for opening and closing pages of an application.
RouterConfig<T>: A convenient bundle to configure a Router widget.
RouterDelegate<T>: A delegate that is used by the Router widget to build and configure a navigating widget.
RouteSettings: Data that might be useful in constructing a Route.
RouteTransitionRecord: A Route wrapper interface that can be staged for TransitionDelegate to decide how its underlying Route should transition on or off screen.
Row: A widget that displays its children in a horizontal array.
RRect: An immutable rounded rectangle with the custom radii for all four corners.
RSTransform: A transform consisting of a translation, a rotation, and a uniform scale.
RSuperellipse: An immutable rounded superellipse.
SafeArea: A widget that insets its child with sufficient padding to avoid intrusions by the operating system.
SameSite: Cookie cross-site availability configuration.
SamplingClock: Class that implements clock used for sampling.
SawTooth: A sawtooth curve that repeats a given number of times over the unit interval.
Scaffold: Implements the basic Material Design visual layout structure.
ScaffoldFeatureController<T extends Widget, U>: An interface for controlling a feature of a Scaffold.
ScaffoldGeometry: Geometry information for Scaffold components after layout is finished.
ScaffoldMessenger: Manages SnackBars and MaterialBanners for descendant Scaffolds.
ScaffoldMessengerState: State for a ScaffoldMessenger.
ScaffoldPrelayoutGeometry: The geometry of the Scaffold after all its contents have been laid out except the FloatingActionButton.
ScaffoldState: State for a Scaffold.
Scalebar: The Scalebar widget is a map layer for FlutterMap.
ScalebarPainter: This painter is used in the Scalebar widget and ensures that all ScalebarPainters have a function to tell the widget what Size it should have.
ScaleEndDetails: Details for GestureScaleEndCallback.
ScaleGestureRecognizer: Recognizes a scale gesture.
ScaleRAWA: Prebuilt animation provider for a RichAttributionWidget
ScaleStartDetails: Details for GestureScaleStartCallback.
ScaleTransition: Animates the scale of a transformed widget.
ScaleUpdateDetails: Details for GestureScaleUpdateCallback.
ScribbleClient: An interface into iOS's stylus handwriting text input.
Scribe: An interface into Android's stylus handwriting text input.
Scrollable: A widget that manages scrolling in one dimension and informs the Viewport through which the content is viewed.
ScrollableDetails: Describes the aspects of a Scrollable widget to inform inherited widgets like ScrollBehavior for decorating or enumerate the properties of combined Scrollables, such as TwoDimensionalScrollable.
ScrollableState: State object for a Scrollable widget.
ScrollAction: An Action that scrolls the relevant Scrollable by the amount configured in the ScrollIntent given to it.
ScrollActivity: Base class for scrolling activities like dragging and flinging.
ScrollActivityDelegate: A backend for a ScrollActivity.
ScrollAwareImageProvider<T extends Object>: An ImageProvider that makes use of Scrollable.recommendDeferredLoadingForContext to avoid loading images when rapidly scrolling.
Scrollbar: A Material Design scrollbar.
ScrollbarPainter: Paints a scrollbar's track and thumb.
ScrollbarTheme: Applies a scrollbar theme to descendant Scrollbar widgets.
ScrollbarThemeData: Defines default property values for descendant Scrollbar widgets.
ScrollBehavior: Describes how Scrollable widgets should behave.
ScrollCacheExtent: The amount of additional content to display and lay out around the viewport.
ScrollConfiguration: Controls how Scrollable widgets behave in a subtree.
ScrollContext: An interface that Scrollable widgets implement in order to use ScrollPosition.
ScrollController: Controls a scrollable widget.
ScrollDragController: Scrolls a scroll view as the user drags their finger across the screen.
ScrollEndNotification: A notification that a Scrollable widget has stopped scrolling.
ScrollHoldController: Interface for holding a Scrollable stationary.
ScrollIncrementDetails: A details object that describes the type of scroll increment being requested of a ScrollIncrementCalculator function, as well as the current metrics for the scrollable.
ScrollIntent: An Intent that represents scrolling the nearest scrollable by an amount appropriate for the type specified.
ScrollMetricsNotification: A notification that a scrollable widget's ScrollMetrics have changed.
ScrollNotification: A Notification related to scrolling.
ScrollNotificationObserver: Notifies its listeners when a descendant scrolls.
ScrollNotificationObserverState: The listener list state for a ScrollNotificationObserver returned by ScrollNotificationObserver.of.
ScrollPhysics: Determines the physics of a Scrollable widget.
ScrollPosition: Determines which portion of the content is visible in a scroll view.
ScrollPositionChange: Defines the parameters of the scroll position change callback.
ScrollPositionWithSingleContext: A scroll position that manages scroll activities for a single ScrollContext.
ScrollSpringSimulation: A SpringSimulation where the value of x is guaranteed to have exactly the end value when the simulation isDone.
ScrollStartNotification: A notification that a Scrollable widget has started scrolling.
ScrollToDocumentBoundaryIntent: Scrolls to the beginning or end of the document depending on the forward parameter.
ScrollUpdateNotification: A notification that a Scrollable widget has changed its scroll position.
ScrollView: A widget that combines a Scrollable and a Viewport to create an interactive scrolling pane of content in one dimension.
SearchAnchor: Manages a "search view" route that allows the user to select one of the suggested completions for a search query.
SearchBar: A Material Design search bar.
SearchBarTheme: Applies a search bar theme to descendant SearchBar widgets.
SearchBarThemeData: Defines default property values for descendant SearchBar widgets.
SearchController: A controller to manage a search view created by SearchAnchor.
SearchDelegate<T>: Delegate for showSearch to define the content of the search page.
SearchViewTheme: An inherited widget that defines the configuration in this widget's descendants for search view created by the SearchAnchor widget.
SearchViewThemeData: Defines the configuration of the search views created by the SearchAnchor widget.
SecureServerSocket: A server socket, providing a stream of high-level Sockets.
SecureSocket: A TCP socket using TLS and SSL.
SecurityContext: The object containing the certificates to trust when making a secure client connection, and the certificate chain and private key to serve from a secure server.
SegmentedButton<T>: A Material button that allows the user to select from limited set of options.
SegmentedButtonState<T>: State for SegmentedButton.
SegmentedButtonTheme: An inherited widget that defines the visual properties for SegmentedButtons in this widget's subtree.
SegmentedButtonThemeData: Overrides the default values of visual properties for descendant SegmentedButton widgets.
SelectableChipAttributes: An interface for Material Design chips that can be selected.
SelectableRegion: A widget that introduces an area for user selections.
SelectableRegionSelectionStatusScope: Notifies its listeners when the selection under a SelectableRegion or SelectionArea is being changed or finalized.
SelectableRegionState: State for a SelectableRegion.
SelectableText: A run of selectable text with a single style.
SelectAction: An action that selects the currently focused control.
SelectAllSelectionEvent: Selects all selectable contents.
SelectAllTextIntent: An Intent to select everything in the field.
SelectedContent: The selected content in a Selectable or SelectionHandler.
SelectedContentRange: This class stores the range information of the selection under a Selectable or SelectionHandler.
SelectIntent: An Intent that selects the currently focused control.
SelectionArea: A widget that introduces an area for user selections with adaptive selection controls.
SelectionAreaState: State for a SelectionArea.
SelectionContainer: A container that handles SelectionEvents for the Selectables in the subtree.
SelectionContainerDelegate: A delegate to handle SelectionEvents for a SelectionContainer.
SelectionDetails: A read-only interface for accessing the details of a selection under a SelectionListener.
SelectionEdgeUpdateEvent: Updates a selection edge.
SelectionEvent: An abstract base class for selection events.
SelectionGeometry: The geometry of the current selection.
SelectionHandler: The abstract interface to handle SelectionEvents.
SelectionListener: A SelectionContainer that allows the user to access the SelectionDetails and listen to selection changes for the child subtree it wraps under a SelectionArea or SelectableRegion.
SelectionListenerNotifier: Notifies listeners when the selection under a SelectionListener has been changed.
SelectionOverlay: An object that manages a pair of selection handles and a toolbar.
SelectionPoint: The geometry information of a selection point.
SelectionRect: Represents a selection rect for a character and it's position in the text.
SelectionRegistrar: A registrar that keeps track of Selectables in the subtree.
SelectionRegistrarScope: An inherited widget to host a SelectionRegistrar for the subtree.
SelectionUtils: A utility class that provides useful methods for handling selection events.
SelectParagraphSelectionEvent: Selects the entire paragraph at the location.
SelectWordSelectionEvent: Selects the whole word at the location.
Semantics: A widget that annotates the widget tree with a description of the meaning of the widgets.
SemanticsAction: The possible actions that can be conveyed from the operating system accessibility APIs to a semantics node.
SemanticsActionEvent: An event to request a SemanticsAction of type to be performed on the SemanticsNode identified by nodeId owned by the FlutterView identified by viewId.
SemanticsConfiguration: Describes the semantic information associated with the owning RenderObject.
SemanticsData: Summary information about a SemanticsNode object.
SemanticsDebugger: A widget that visualizes the semantics for the child.
SemanticsEvent: An event sent by the application to notify interested listeners that something happened to the user interface (e.g. a view scrolled).
SemanticsFlag: A Boolean value that can be associated with a semantics node.
SemanticsFlags: Represents a collection of boolean flags that convey semantic information about a widget's accessibility state and properties.
SemanticsGestureDelegate: A base class that describes what semantics notations a RawGestureDetector should add to the render object RenderSemanticsGestureHandler.
SemanticsHandle: A reference to the semantics information generated by the framework.
SemanticsHintOverrides: Provides hint values which override the default hints on supported platforms.
SemanticsLabelBuilder: Builder for creating semantically correct concatenated labels with proper text direction handling and spacing.
SemanticsNode: A node that represents some semantic data.
SemanticsOwner: Owns SemanticsNode objects and notifies listeners of changes to the render tree semantics.
SemanticsProperties: Contains properties used by assistive technologies to make the application more accessible.
SemanticsService: Allows access to the platform's accessibility services.
SemanticsSortKey: Base class for all sort keys for SemanticsProperties.sortKey accessibility traversal order sorting.
SemanticsTag: A tag for a SemanticsNode.
SemanticsUpdateBuilder: An object that creates SemanticsUpdate objects.
SensitiveContent: Widget to set the ContentSensitivity of content in the widget tree.
SensitiveContentHost: Host of the current content sensitivity for the widget tree that contains some number SensitiveContent widgets.
SensitiveContentService: Service for setting the content sensitivity of the native app window (Android View) that contains the app's widget tree.
SerialTapCancelDetails: Details for GestureSerialTapCancelCallback, such as the tap count within the series.
SerialTapDownDetails: Details for GestureSerialTapDownCallback, such as the tap count within the series.
SerialTapGestureRecognizer: Recognizes serial taps (taps in a series).
SerialTapUpDetails: Details for GestureSerialTapUpCallback, such as the tap count within the series.
ServerSocket: A listening socket.
ServiceKeyTags: E8 — club services, with E8.E0 service items.
SessionKeyTags: E0 — session keys returned by logon.
Shader: Base class for objects such as Gradient and ImageShader which correspond to shaders as used by Paint.shader.
ShaderMask: A widget that applies a mask generated by a Shader to its child.
ShaderMaskLayer: A composited layer that applies a shader to its children.
ShaderWarmUp: Interface for drawing an image to warm up Skia shader compilations.
Shadow: A single shadow.
ShapeBorder: Base class for shape outlines.
ShapeBorderClipper: A CustomClipper that clips to the outer path of a ShapeBorder.
ShapeBorderTween: An interpolation between two ShapeBorders.
ShapeDecoration: An immutable description of how to paint an arbitrary shape.
ShapedInputBorder: Draws a custom shape around an InputDecorator's container.
SharedAppData: Enables sharing key/value data with its child and all of the child's descendants.
ShortcutActivator: An interface to define the keyboard key combination to trigger a shortcut.
ShortcutManager: A manager of keyboard shortcut bindings used by Shortcuts to handle key events.
ShortcutMapProperty: A DiagnosticsProperty which handles formatting a Map<LogicalKeySet, Intent> (the same type as the Shortcuts.shortcuts property) so that its diagnostic output is human-readable.
ShortcutRegistrar: A widget that holds a ShortcutRegistry which allows descendants to add, remove, or replace shortcuts.
ShortcutRegistry: A class used by ShortcutRegistrar that allows adding or removing shortcut bindings by descendants of the ShortcutRegistrar.
ShortcutRegistryEntry: A entry returned by ShortcutRegistry.addAll that allows the caller to identify the shortcuts they registered with the ShortcutRegistry through the ShortcutRegistrar.
Shortcuts: A widget that creates key bindings to specific actions for its descendants.
ShortcutSerialization: A class used by MenuSerializableShortcut to describe the shortcut for serialization to send to the platform for rendering a PlatformMenuBar.
ShrinkWrappingViewport: A widget that is bigger on the inside and shrink wraps its children in the main axis.
SimpleAttributionWidget: A simple, classic style, attribution layer
SimpleCentroidCalculator: Places the Polygon.label at the approximate centroid calculated by averaging all the points of the polygon
SimpleDialog: A simple Material Design dialog.
SimpleDialogOption: An option used in a SimpleDialog.
SimpleMultiWorldCentroidCalculator: Similar to SimpleCentroidCalculator, but supports correct placement of the Polygon.label when the polygon lies across the anti-meridian
Simulation: The base class for all simulations.
SingleActivator: A shortcut key combination of a single key and modifiers.
SingleChildLayoutDelegate: A delegate for computing the layout of a render object with a single child.
SingleChildRenderObjectElement: An Element that uses a SingleChildRenderObjectWidget as its configuration.
SingleChildRenderObjectWidget: A superclass for RenderObjectWidgets that configure RenderObject subclasses that have a single child slot.
SingleChildScrollView: A box in which a single widget can be scrolled.
SingleSubscriptionTransformer<S, T>: A transformer that converts a broadcast stream into a single-subscription stream.
SingletonFlutterWindow: Deprecated. Will be removed in a future version of Flutter.
Size: Holds a 2D floating-point size.
SizeChangedLayoutNotification: Indicates that the size of one of the descendants of the object receiving this notification has changed, and that therefore any assumptions about that layout are no longer valid.
SizeChangedLayoutNotifier: A widget that automatically dispatches a SizeChangedLayoutNotification when the layout dimensions of its child change.
SizedBox: A box with a specified size.
SizedOverflowBox: A widget that is a specific size but passes its original constraints through to its child, which may then overflow.
SizeTransition: Animates its own size and clips and aligns its child.
SizeTween: An interpolation between two sizes.
Slider: A Material Design slider.
SliderComponentShape: Base class for slider thumb, thumb overlay, and value indicator shapes.
SliderTheme: Applies a slider theme to descendant Slider widgets.
SliderThemeData: Overrides the default values of visual properties for descendant Slider widgets.
SliderTickMarkShape: Base class for Slider tick mark shapes.
SliderTrackShape: Base class for slider track shapes.
SlideTransition: Animates the position of a widget relative to its normal position.
SliverAnimatedGrid: A SliverGrid that animates items when they are inserted or removed.
SliverAnimatedGridState: The state for a SliverAnimatedGrid that animates items when they are inserted or removed.
SliverAnimatedList: A SliverList that animates items when they are inserted or removed.
SliverAnimatedListState: The state for a SliverAnimatedList that animates items when they are inserted or removed.
SliverAnimatedOpacity: Animated version of SliverOpacity which automatically transitions the sliver child's opacity over a given duration whenever the given opacity changes.
SliverAppBar: A Material Design app bar that integrates with a CustomScrollView.
SliverChildBuilderDelegate: A delegate that supplies children for slivers using a builder callback.
SliverChildDelegate: A delegate that supplies children for slivers.
SliverChildListDelegate: A delegate that supplies children for slivers using an explicit list.
SliverConstrainedCrossAxis: A sliver that constrains the cross axis extent of its sliver child.
SliverConstraints: Immutable layout constraints for RenderSliver layout.
SliverCrossAxisExpanded: Set a flex factor for allocating space in the cross axis direction.
SliverCrossAxisGroup: A sliver that places multiple sliver children in a linear array along the cross axis.
SliverEnsureSemantics: A sliver that ensures its sliver child is included in the semantics tree.
SliverFadeTransition: Animates the opacity of a sliver widget.
SliverFillRemaining: A sliver that contains a single box child that fills the remaining space in the viewport.
SliverFillViewport: A sliver that contains multiple box children that each fills the viewport.
SliverFixedExtentList: A sliver that places multiple box children with the same main axis extent in a linear array.
SliverFloatingHeader: A sliver that shows its child when the user scrolls forward and hides it when the user scrolls backwards.
SliverGeometry: Describes the amount of space occupied by a RenderSliver.
SliverGrid: A sliver that places multiple box children in a two dimensional arrangement.
SliverGridDelegate: Controls the layout of tiles in a grid.
SliverGridDelegateWithFixedCrossAxisCount: Creates grid layouts with a fixed number of tiles in the cross axis.
SliverGridDelegateWithMaxCrossAxisExtent: Creates grid layouts with tiles that each have a maximum cross-axis extent.
SliverGridGeometry: Describes the placement of a child in a RenderSliverGrid.
SliverGridLayout: The size and position of all the tiles in a RenderSliverGrid.
SliverGridParentData: Parent data structure used by RenderSliverGrid.
SliverGridRegularTileLayout: A SliverGridLayout that uses equally sized and spaced tiles.
SliverHitTestEntry: A hit test entry used by RenderSliver.
SliverHitTestResult: The result of performing a hit test on RenderSlivers.
SliverIgnorePointer: A sliver widget that is invisible during hit testing.
SliverLayoutBuilder: Builds a sliver widget tree that can depend on its own SliverConstraints.
SliverLayoutDimensions: Relates the dimensions of the RenderSliver during layout.
SliverList: A sliver that places multiple box children in a linear array along the main axis.
SliverLogicalContainerParentData: Parent data for slivers that have multiple children and that position their children using layout offsets.
SliverLogicalParentData: Parent data structure used by parents of slivers that position their children using layout offsets.
SliverMainAxisGroup: A sliver that places multiple sliver children in a linear array along the main axis, one after another.
SliverMultiBoxAdaptorElement: An element that lazily builds children for a SliverMultiBoxAdaptorWidget.
SliverMultiBoxAdaptorParentData: Parent data structure used by RenderSliverMultiBoxAdaptor.
SliverMultiBoxAdaptorWidget: A base class for slivers that have multiple box children.
SliverOffstage: A sliver that lays its sliver child out as if it was in the tree, but without painting anything, without making the sliver child available for hit testing, and without taking any room in the parent.
SliverOpacity: A sliver widget that makes its sliver child partially transparent.
SliverOverlapAbsorber: A sliver that wraps another, forcing its layout extent to be treated as overlap.
SliverOverlapAbsorberHandle: Handle to provide to a SliverOverlapAbsorber, a SliverOverlapInjector, and an NestedScrollViewViewport, to shift overlap in a NestedScrollView.
SliverOverlapInjector: A sliver that has a sliver geometry based on the values stored in a SliverOverlapAbsorberHandle.
SliverPadding: A sliver that applies padding on each side of another sliver.
SliverPersistentHeader: A sliver whose size varies when the sliver is scrolled to the edge of the viewport opposite the sliver's GrowthDirection.
SliverPersistentHeaderDelegate: Delegate for configuring a SliverPersistentHeader.
SliverPhysicalContainerParentData: Parent data for slivers that have multiple children and that position their children using absolute coordinates.
SliverPhysicalParentData: Parent data structure used by parents of slivers that position their children using absolute coordinates.
SliverPrototypeExtentList: A sliver that places its box children in a linear array and constrains them to have the same extent as a prototype item along the main axis.
SliverReorderableList: A sliver list that allows the user to interactively reorder the list items.
SliverReorderableListState: The state for a sliver list that allows the user to interactively reorder the list items.
SliverResizingHeader: A sliver that is pinned to the start of its CustomScrollView and reacts to scrolling by resizing between the intrinsic sizes of its min and max extent prototypes.
SliverSafeArea: A sliver that insets another sliver by sufficient padding to avoid intrusions by the operating system.
SliverSemantics: A sliver that annotates its subtree with a description of the meaning of the slivers.
SliverToBoxAdapter: A sliver that contains a single box widget.
SliverVariedExtentList: A sliver that places its box children in a linear array and constrains them to have the corresponding extent returned by itemExtentBuilder.
SliverVisibility: Whether to show or hide a sliver child.
SliverWithKeepAliveWidget: A base class for slivers that have KeepAlive children.
SlottedMultiChildRenderObjectWidget<SlotType, ChildType extends RenderObject>: A superclass for RenderObjectWidgets that configure RenderObject subclasses that organize their children in different slots.
SlottedRenderObjectElement<SlotType, ChildType extends RenderObject>: Element used by the SlottedMultiChildRenderObjectWidget.
SnackBar: A lightweight message with an optional action which briefly displays at the bottom of the screen.
SnackBarAction: A button for a SnackBar, known as an "action".
SnackBarTheme: An inherited widget that defines the configuration for SnackBars in this widget's subtree.
SnackBarThemeData: Customizes default property values for SnackBar widgets.
SnapshotController: A controller for the SnapshotWidget that controls when the child image is displayed and when to regenerated the child image.
SnapshotPainter: A painter used to paint either a snapshot or the child widgets that would be a snapshot.
SnapshotWidget: A widget that can replace its child with a snapshotted version of the child.
Socket: A TCP connection between two sockets.
SocketControlMessage: Control message part of the SocketMessage received by a call to RawSocket.readMessage.
SocketDirection: The SocketDirection is used as a parameter to Socket.close and RawSocket.close to close a socket in the specified direction(s).
SocketIsoTransport: An IsoTransport backed by a real TCP socket, with optional mutual TLS.
SocketMessage: A socket message received by a RawDatagramSocket.
SocketOption: An option for a socket which is configured using Socket.setOption.
SourceAttribution: Base class for attributions that render themselves as widgets in a RichAttributionWidget
Spacer: Spacer creates an adjustable, empty spacer that can be used to tune the spacing between widgets in a Flex container, like Row or Column.
SpellCheckConfiguration: Controls how spell check is performed for text input.
SpellCheckResults: A data structure grouping together the SuggestionSpans and related text of results returned by a spell checker.
SpellCheckService: Determines how spell check results are received for text input.
SpellCheckSuggestionsToolbar: The default spell check suggestions toolbar for Android.
SpellCheckSuggestionsToolbarLayoutDelegate: Positions the toolbar below anchor or adjusts it higher to fit above the bottom view insets, if applicable.
SpellOutStringAttribute: A string attribute that causes the assistive technologies, e.g. VoiceOver, to spell out the string character by character.
SphericalMercator: Spherical mercator projection
Split: A curve that progresses according to beginCurve until split, then according to endCurve.
SpringDescription: Structure that describes a spring's constants.
SslAuthError: Represents an SSL error with the associated certificate.
Stack: A widget that positions its children relative to the edges of its box.
StackFilter: A class that filters stack frames for additional filtering on FlutterError.defaultStackFilter.
StackFrame: A object representation of a frame from a stack trace.
StackParentData: Parent data for use with RenderStack.
StadiumBorder: A border that fits a stadium-shaped border (a box with semicircles on the ends) within the rectangle of the widget it is applied to.
StandardFabLocation: A base class that simplifies building FloatingActionButtonLocations when used with mixins FabTopOffsetY, FabFloatOffsetY, FabDockedOffsetY, FabStartOffsetX, FabCenterOffsetX, FabEndOffsetX, and FabMiniOffsetAdjustment.
StandardMessageCodec: MessageCodec using the Flutter standard binary encoding.
StandardMethodCodec: MethodCodec using the Flutter standard binary encoding.
StarBorder: A border that fits a star or polygon-shaped border within the rectangle of the widget it is applied to.
State<T extends StatefulWidget>: The logic and internal state for a StatefulWidget.
StatefulBuilder: A platonic widget that both has state and calls a closure to obtain its child widget.
StatefulElement: An Element that uses a StatefulWidget as its configuration.
StatefulWidget: A widget that has mutable state.
StatelessElement: An Element that uses a StatelessWidget as its configuration.
StatelessWidget: A widget that does not require mutable state.
StatementKeyTags: E1 — account statement rows. Merged after CisKeyTags, so E1.81 resolves to BCD here, matching the Java merge order.
StaticSelectionContainerDelegate: A delegate that manages updating multiple Selectable children where the Selectables do not change or move around frequently.
StatusTransitionWidget: A widget that rebuilds when the given animation changes status.
Stdin: The standard input stream of the process.
StdioType: The type of object a standard IO stream can be attached to.
Stdout: An IOSink connected to either the standard out or error of the process.
Step: A material step used in Stepper. The step can have a title and subtitle, an icon within its circle, some content and a state that governs its styling.
Stepper: A material stepper widget that displays progress through a sequence of steps. Steppers are particularly useful in the case of forms where one step requires the completion of another one, or where multiple steps need to be completed in order to submit the whole form.
StepStyle: This class is used to override the default visual properties of Step widgets within a Stepper.
StepTween: An interpolation between two integers that floors.
Stream<T>: A source of asynchronous data events.
StreamBuilder<T>: Widget that builds itself based on the latest snapshot of interaction with a Stream.
StreamBuilderBase<T, S>: Base class for widgets that build themselves based on interaction with a specified Stream.
StreamCloser<T>: A StreamTransformer that allows the caller to forcibly close the transformed Stream.
StreamCompleter<T>: A single-subscription stream where the contents are provided later.
StreamConsumer<S>: Abstract interface for a "sink" accepting multiple entire streams.
StreamController<T>: A controller with the stream it controls.
StreamedRequest: An HTTP request where the request body is sent asynchronously after the connection has been established and the headers have been sent.
StreamedResponse: An HTTP response where the response body is received asynchronously after the headers have been received.
StreamGroup<T>: A collection of streams whose events are unified and sent through a central stream.
StreamIterator<T>: An Iterator-like interface for the values of a Stream.
StreamQueue<T>: An asynchronous pull-based interface for accessing stream events.
StreamQueueTransaction<T>: A transaction on a StreamQueue, created by StreamQueue.startTransaction.
StreamSink<S>: A object that accepts stream events both synchronously and asynchronously.
StreamSinkBase<T>: An abstract class that implements StreamSink in terms of onAdd, onError, and onClose methods.
StreamSinkCompleter<T>: A sink where the destination is provided later.
StreamSinkTransformer<S, T>: A StreamSinkTransformer transforms the events being passed to a sink.
StreamSplitter<T>: A class that splits a single source stream into an arbitrary number of (single-subscription) streams (called "branch") that emit the same events.
StreamSubscription<T>: A subscription on events from a Stream.
StreamTransformer<S, T>: Transforms a Stream.
StreamTransformerBase<S, T>: Base class for implementing StreamTransformer.
StreamView<T>: Stream wrapper that only exposes the Stream interface.
StreamZip<T>: A stream that combines the values of other streams.
StretchEffect: A widget that applies a stretching visual effect to its child.
StretchingOverscrollIndicator: A Material Design visual indication that a scroll view has overscrolled.
StringAttribute: An abstract interface for string attributes that affects how assistive technologies, e.g. VoiceOver or TalkBack, treat the text.
StringCodec: MessageCodec with UTF-8 encoded String messages.
StringConversionSink: A sink for converters to efficiently transmit String data.
StringProperty: Property which encloses its string value in quotes.
StrokePattern: Determines whether a stroke should be solid, dotted, or dashed, and the exact characteristics of each
StrutStyle: Defines the strut, which sets the minimum height a line can be relative to the baseline.
SubmenuButton: A menu button that displays a cascading menu.
SubscriptionStream<T>: A Stream adapter for a StreamSubscription.
SuggestionSpan: A data structure representing a range of misspelled text and the suggested replacements for this range.
Summary: An annotation that provides a short description of a class for use in an index.
SurfaceAndroidViewController: Controls an Android view that is composed using a GL texture. This controller is created from the PlatformViewsService.initSurfaceAndroidView factory, and is defined for backward compatibility.
Svg: A utility class for decoding SVG data to a DrawableRoot or a PictureInfo.
SvgAssetLoader: A BytesLoader that decodes and parses an SVG asset in an isolate and creates a vector_graphics binary representation.
SvgBytesLoader: A BytesLoader that decodes and parses a UTF-8 encoded SVG string from a Uint8List in an isolate and creates a vector_graphics binary representation.
SvgCacheKey: A SvgTheme aware cache key.
SvgFileLoader: A BytesLoader that decodes SVG data from a file in an isolate and creates a vector_graphics binary representation.
SvgLoader<T>: A BytesLoader that parses a SVG data in an isolate and creates a vector_graphics binary representation.
SvgNetworkLoader: A BytesLoader that decodes and parses a UTF-8 encoded SVG string the network in an isolate and creates a vector_graphics binary representation.
SvgPicture: A widget that will parse SVG data for rendering on screen.
SvgStringLoader: A BytesLoader that parses an SVG string in an isolate and creates a vector_graphics binary representation.
SvgTheme: A theme used when decoding an SVG picture.
SweepGradient: A 2D sweep gradient.
Switch: A Material Design switch.
SwitchListTile: A ListTile with a Switch. In other words, a switch with a label.
SwitchTheme: Applies a switch theme to descendant Switch widgets.
SwitchThemeData: Defines default property values for descendant Switch widgets.
SynchronousFuture<T>: A Future whose then implementation calls the callback immediately.
SynchronousStreamController<T>: A stream controller that delivers its events synchronously.
SystemChannels: Platform channels used by the Flutter system.
SystemChrome: Controls specific aspects of the operating system's graphical interface and how it interacts with the application.
SystemContextMenu: Displays the system context menu on top of the Flutter view.
SystemContextMenuController: Allows access to the system context menu.
SystemEncoding: The system encoding is the current code page on Windows and UTF-8 on Linux and Mac.
SystemMouseCursor: A mouse cursor that is natively supported on the platform that the application is running on.
SystemMouseCursors: A collection of system MouseCursors.
SystemNavigator: Controls specific aspects of the system navigation stack.
SystemSound: Provides access to the library of short system specific sounds for common tasks.
SystemTextScaler: A TextScaler that reflects the user's font scale preferences from the platform's accessibility settings.
SystemUiOverlayStyle: Specifies a preference for the style of the system overlays.
Tab: A Material Design TabBar tab.
TabBar: A Material Design primary tab bar.
TabBarScrollController: The ScrollController for a TabBar widget.
TabBarTheme: Defines default property values for descendant TabBar widgets.
TabBarThemeData: Defines default property values for descendant TabBar widgets.
TabBarView: A page view that displays the widget which corresponds to the currently selected tab.
TabController: Coordinates tab selection between a TabBar and a TabBarView.
Table: A widget that uses the table layout algorithm for its children.
TableBorder: Border specification for Table widgets.
TableCell: A widget that controls how a child of a Table is aligned.
TableCellParentData: Parent data used by RenderTable for its children.
TableColumnWidth: Base class to describe how wide a column in a RenderTable should be.
TableRow: A horizontal group of cells in a Table.
TableRowInkWell: A rectangular area of a Material that responds to touch but clips its ink splashes to the current table row of the nearest table.
TabPageSelector: Uses TabPageSelectorIndicator to display a row of small circular indicators, one per tab.
TabPageSelectorIndicator: Displays a single circle with the specified size, border style, border color and background colors.
TapAndDragGestureRecognizer: Recognizes taps along with both horizontal and vertical movement.
TapAndHorizontalDragGestureRecognizer: Recognizes taps along with movement in the horizontal direction.
TapAndPanGestureRecognizer: Recognizes taps along with both horizontal and vertical movement.
TapDownDetails: Details for GestureTapDownCallback, such as position.
TapDragDownDetails: Details for GestureTapDragDownCallback, such as the number of consecutive taps.
TapDragEndDetails: Details for GestureTapDragEndCallback, such as the number of consecutive taps.
TapDragStartDetails: Details for GestureTapDragStartCallback, such as the number of consecutive taps.
TapDragUpdateDetails: Details for GestureTapDragUpdateCallback, such as the number of consecutive taps.
TapDragUpDetails: Details for GestureTapDragUpCallback, such as the number of consecutive taps.
TapGestureRecognizer: Recognizes taps.
TapMoveDetails: Details object for callbacks that use GestureTapMoveCallback.
TappableChipAttributes: An interface for Material Design chips that can be tapped.
TapPosition
TapRegion: A widget that defines a region that can detect taps inside or outside of itself and any group of regions it belongs to, without participating in the gesture disambiguation system (other than to consume tap down events if consumeOutsideTaps is true).
TapRegionRegistry: An interface for registering and unregistering a RenderTapRegion (typically created with a TapRegion widget) with a RenderTapRegionSurface (typically created with a TapRegionSurface widget).
TapRegionSurface: A widget that provides notification of a tap inside or outside of a set of registered regions, without participating in the gesture disambiguation system.
TapSemanticEvent: An event which triggers tap semantic feedback.
TapUpDetails: Details for GestureTapUpCallback, such as position.
TerminalDeviceInfo: Hardware identity of this terminal, sent as TLV tags C0 and D0.
TerminalInitKeySetting: PED slots holding the terminal master key and the key that MACs an init logon. Ported from TerminalInitKeySetting.
TerminalLogicalInfo: Terminal and merchant identity as the host reported it at logon. Ported from TerminalLogicalInfo.
TerminalSessionKeyIndexSetting: PED slots the session keys returned by logon are written into. Ported from TerminalSessionKeyIndexSetting.
Text: A run of text with a single style.
TextAlignVertical: The vertical alignment of text within an input box.
TextBoundary: An interface for retrieving the logical text boundary (as opposed to the visual boundary) at a given code unit offset in a document.
TextBox: A rectangle enclosing a run of text.
TextButton: A Material Design "Text Button".
TextButtonTheme: Overrides the default ButtonStyle of its TextButton descendants.
TextButtonThemeData: A ButtonStyle that overrides the default appearance of TextButtons when it's used with TextButtonTheme or with the overall Theme's ThemeData.textButtonTheme.
TextDecoration: A linear decoration to draw near the text.
TextEditingController: A controller for an editable text field.
TextEditingDelta: A structure representing a granular change that has occurred to the editing state as a result of text editing.
TextEditingDeltaDeletion: A structure representing the deletion of a single/or contiguous sequence of characters in an editing state.
TextEditingDeltaInsertion: A structure representing an insertion of a single/or contiguous sequence of characters at some offset of an editing state.
TextEditingDeltaNonTextUpdate: A structure representing changes to the selection and/or composing regions of an editing state and no changes to the text value.
TextEditingDeltaReplacement: A structure representing a replacement of a range of characters with a new sequence of text.
TextEditingValue: The current text, selection, and composing state for editing a run of text.
TextField: A Material Design text field.
TextFieldTapRegion: A TapRegion that adds its children to the tap region group for widgets based on the EditableText text editing widget, such as TextField and CupertinoTextField.
TextFormField: A FormField that contains a TextField.
TextHeightBehavior: Defines how to apply TextStyle.height over and under text.
TextInput: An low-level interface to the system's text input control.
TextInputConfiguration: Controls the visual appearance of the text input control.
TextInputConnection: An interface for interacting with a text input control.
TextInputFormatter: A TextInputFormatter can be optionally injected into an EditableText to provide as-you-type validation and formatting of the text being edited.
TextInputStyle: Text styling information for the current input client.
TextInputType: The type of information for which to optimize the text input control.
TextLayoutMetrics: A read-only interface for accessing visual information about the implementing text.
TextMagnifier: A Magnifier positioned by rules dictated by the native Android magnifier.
TextMagnifierConfiguration: A configuration object for a magnifier (e.g. in a text field).
TextPainter: An object that paints a TextSpan tree into a Canvas.
TextParentData: Parent data used by RenderParagraph and RenderEditable to annotate inline contents (such as WidgetSpans) with.
TextPosition: A position in a string of text.
TextRange: A range of characters in a string of text.
TextScaler: A class that describes how textual contents should be scaled for better readability.
TextSelection: A range of text that represents a selection.
TextSelectionControls: An interface for building the selection UI, to be provided by the implementer of the toolbar widget.
TextSelectionGestureDetector: A gesture detector to respond to non-exclusive event chains for a text field.
TextSelectionGestureDetectorBuilder: Builds a TextSelectionGestureDetector to wrap an EditableText.
TextSelectionGestureDetectorBuilderDelegate: Delegate interface for the TextSelectionGestureDetectorBuilder.
TextSelectionOverlay: An object that manages a pair of text selection handles for a RenderEditable.
TextSelectionPoint: Represents the coordinates of the point in a selection, and the text direction at that point, relative to top left of the RenderEditable that holds the selection.
TextSelectionTheme: An inherited widget that defines the appearance of text selection in this widget's subtree.
TextSelectionThemeData: Defines the text selection visual properties for descendant TextField and SelectableText widgets.
TextSelectionToolbar: A fully-functional Material-style text selection toolbar.
TextSelectionToolbarAnchors: The position information for a text selection toolbar.
TextSelectionToolbarLayoutDelegate: A SingleChildLayoutDelegate for use with CustomSingleChildLayout that positions its child above anchorAbove if it fits, or otherwise below anchorBelow.
TextSelectionToolbarTextButton: A button styled like a Material native Android text selection menu button.
TextSourceAttribution: A simple text attribution displayed in the popup box of a RichAttributionWidget
TextSpan: An immutable span of text.
TextStyle: An immutable style describing how to format and paint text.
TextStyleTween: An interpolation between two TextStyles.
TextTheme: Material design text theme.
TextTreeConfiguration: Configuration specifying how a particular DiagnosticsTreeStyle should be rendered as text art.
TextTreeRenderer: Renderer that creates ASCII art representations of trees of DiagnosticsNode objects.
Texture: A rectangle upon which a backend texture is mapped.
TextureAndroidViewController: Controls an Android view that is rendered as a texture. This is typically used by AndroidView to display a View in the Android view hierarchy.
TextureBox: A rectangle upon which a backend texture is mapped.
TextureLayer: A composited layer that maps a backend texture to a rectangle.
Theme: Applies a theme to descendant widgets.
ThemeData: Defines the configuration of the overall visual Theme for a MaterialApp or a widget subtree within the app.
ThemeDataTween: An interpolation between two ThemeDatas.
ThemeExtension<T extends ThemeExtension<T>>: An interface that defines custom additions to a ThemeData object.
ThreePointCubic: A cubic polynomial composed of two curves that share a common center point.
Threshold: A curve that is 0.0 until it hits the threshold, then it jumps to 1.0.
TickerFuture: An object representing an ongoing Ticker sequence.
TickerMode: Enables or disables tickers (and thus animation controllers) in the widget subtree.
TickerModeData: Immutable compound values that describe the effective ticker behavior for a subtree.
TickerProvider: An interface implemented by classes that can vend Ticker objects.
TileCoordinates: Tile coordinates identify the position of the tile position for slippy map tiles. The z coordinate represents the zoom level where the zoom level of 0 fits the complete world while bigger z values are using accordingly to the zoom level of the MapCamera.
TileCoordinatesResolver: Resolves coordinates in the context of world replications.
TileDisplay: Defines how the tile should get displayed on the map.
TileImage: The tile image class
TileLayer: Describes the needed properties to create a raster tile layer. A tile is an image bound to a specific geographical position.
TileProvider: The base tile provider, extended by other classes with more specialised purposes and/or requirements
TileUpdateEvent: Describes whether loading and/or pruning should occur and allows overriding the load center/zoom.
TileUpdateTransformers: Contains a set of built-in TileUpdateTransformers
TimedBlock: Provides start, end, and duration of a named block of code, timed by FlutterTimeline.
TimeOfDay: A value representing a time during the day, independent of the date that day might fall on or the time zone.
TimePickerDialog: A Material Design time picker designed to appear inside a popup dialog.
TimePickerTheme: An inherited widget that defines the configuration for time pickers displayed using showTimePicker in this widget's subtree.
TimePickerThemeData: Defines the visual properties of the widget displayed with showTimePicker.
Timer: A countdown timer that can be configured to fire once or repeatedly.
Title: A widget that describes this app in the operating system.
TlsProtocolVersion: A Transport Layer Security (TLS) version.
TlvList: An ordered list of TlvMsg, the shape of ISO field 63 in the OSS protocol.
TlvMsg: One tag-length-value item. value holds a String while the message is being built and a Uint8List (or a nested TlvList) once packed.
ToggleablePainter: A base class for a CustomPainter that may be passed to ToggleableStateMixin.buildToggleable to draw the visual representation of a Toggleable.
ToggleButtons: A set of toggle buttons.
ToggleButtonsTheme: An inherited widget that defines color and border parameters for ToggleButtons in this widget's subtree.
ToggleButtonsThemeData: Defines default property values for descendant ToggleButtons widgets.
Tolerance: Structure that specifies maximum allowable magnitudes for distances, durations, and velocity differences to be considered equal.
ToolbarItemsParentData: ParentData that determines whether or not to paint the corresponding child.
ToolbarOptions: Toolbar configuration for EditableText.
Tooltip: A Material Design tooltip.
TooltipPositionContext: Contextual information for positioning a tooltip.
TooltipSemanticsEvent: An event for a semantic announcement of a tooltip.
TooltipState: Contains the state for a Tooltip.
TooltipTheme: Applies a tooltip theme to descendant Tooltip widgets.
TooltipThemeData: Defines default property values for descendant Tooltip widgets.
TooltipVisibility: Overrides the visibility of descendant Tooltip widgets.
TrackingScrollController: A ScrollController whose initialScrollOffset tracks its most recently updated ScrollPosition.
TrainHoppingAnimation: This animation starts by proxying one animation, but when the value of that animation crosses the value of the second (either because the second is going in the opposite direction, or because the one overtakes the other), the animation hops over to proxying the second animation.
Transform: A widget that applies a transformation before painting its child.
TransformationController: A thin wrapper on ValueNotifier whose value is a Matrix4 representing a transformation.
TransformLayer: A composited layer that applies a given transformation matrix to its children.
TransformProperty: Property which handles Matrix4 that represent transforms.
TransitionDelegate<T>: The delegate that decides how pages added and removed from Navigator.pages transition in or out of the screen.
TransitionRoute<T>: A route with entrance and exit transitions.
TranslucentPointer: A widget that is invisible for its parent during hit testing, but still allows its subtree to receive pointer events
TransposeCharactersIntent: An Intent that represents a user interaction that attempts to swap the characters immediately around the cursor.
TreeSliver<T>: A widget that displays TreeSliverNodes that expand and collapse in a vertically and horizontally scrolling Viewport.
TreeSliverController: Enables control over the TreeSliverNodes of a TreeSliver.
TreeSliverIndentationType: The style of indentation for TreeSliverNodes in a TreeSliver, as handled by RenderTreeSliver.
TreeSliverNode<T>: A data structure for configuring children of a TreeSliver.
TreeSliverNodeParentData: Used to pass information down to RenderTreeSliver.
Tween<T extends Object?>: A linear interpolation between a beginning and ending value.
TweenAnimationBuilder<T extends Object?>: Widget builder that animates a property of a Widget to a target value whenever the target value changes.
TweenSequence<T>: Enables creating an Animation whose value is defined by a sequence of Tweens.
TweenSequenceItem<T>: A simple holder for one element of a TweenSequence.
TwoDimensionalChildBuilderDelegate: A delegate that supplies children for a TwoDimensionalScrollView using a builder callback.
TwoDimensionalChildDelegate: A delegate that supplies children for scrolling in two dimensions.
TwoDimensionalChildListDelegate: A delegate that supplies children for a TwoDimensionalViewport using an explicit two dimensional array.
TwoDimensionalChildManager: A delegate used by RenderTwoDimensionalViewport to manage its children.
TwoDimensionalScrollable: A widget that manages scrolling in both the vertical and horizontal dimensions and informs the TwoDimensionalViewport through which the content is viewed.
TwoDimensionalScrollableState: State object for a TwoDimensionalScrollable widget.
TwoDimensionalScrollView: A widget that combines a TwoDimensionalScrollable and a TwoDimensionalViewport to create an interactive scrolling pane of content in both vertical and horizontal dimensions.
TwoDimensionalViewport: A widget through which a portion of larger content can be viewed, typically in combination with a TwoDimensionalScrollable.
TwoDimensionalViewportParentData: Parent data structure used by RenderTwoDimensionalViewport.
Typography: The color and geometry TextThemes for Material apps.
U: App-wide settings and data: base URL, localized strings (U.s), user, app settings, dynamic tabs. U.s.save, U.baseUrl
U1DReader: Internal: base of 1D readers.
U1DResult: Internal: decoded 1D barcode.
U3DViewer: Interactive 3D model viewer (rotate, zoom, pan, hotspots, animation) with a "View in AR" button; works on every platform. U3DViewer(source: UArSource.url(glbUrl))
U3DViewerState: State of U3DViewer; use it to open AR from code.
UAccountingBreakdownItem
UAccountingReportParams
UAccountingReportResponse
UAccountingService
UAccountingTimelineItem
UAccountNumberModel: A bank account number and its display format.
UActionTile: Large tappable action: an icon badge, a title and a one-line explanation. Sized for gloved thumbs on a POS.
UAddDownloadSheet: Bottom sheet to paste a URL and pick where it goes — the "Add URL" box of desktop managers.
UAddressCreateParams
UAddressJson
UAddressReadParams
UAddressResponse
UAddressSelectorArgs
UAddressService
UAddressUpdateParams
UAdmin
UAdminApiLogController
UAdminApiLogPage
UAdminAppSettingsPage
UAdminBlogController
UAdminBlogPage
UAdminConfig
UAdminContentController
UAdminContentItemForm: One editable row of a content's items.
UAdminContentLinkForm: One editable row of a content's links.
UAdminContentPage
UAdminDashboard: Presentation pieces shared by the admin dashboards.
UAdminField
UAdminFinancialOpsDashboardController
UAdminFinancialOpsDashboardPage
UAdminGoldController
UAdminGoldPage
UAdminGroup
UAdminHotelContractController
UAdminHotelContractPage
UAdminHotelController
UAdminHotelDashboardController
UAdminHotelDashboardPage
UAdminHotelDormBedController
UAdminHotelDormBedPage
UAdminHotelDormController
UAdminHotelDormPage
UAdminHotelDormRoomController
UAdminHotelDormRoomPage
UAdminHotelInvoiceController
UAdminHotelInvoicePage
UAdminHotelPage
UAdminHotelReservationController
UAdminHotelReservationPage
UAdminHotelReviewController: Moderation of the reviews guests write about hotels and dorms.
UAdminHotelReviewPage
UAdminHotelRoomController
UAdminHotelRoomPage
UAdminHotelUserController: Hotel users list and the one user dialog: create, or details + edit.
UAdminHotelUserPage
UAdminListView<T>
UAdminLoginController
UAdminLoginPage
UAdminModule
UAdminPageBody
UAdminParkingController
UAdminParkingPage
UAdminParkingPlateFlagController
UAdminParkingPlateFlagPage
UAdminParkingReportController
UAdminParkingReportPage
UAdminParkingShiftController
UAdminParkingShiftPage
UAdminParkingStaffController
UAdminParkingStaffPage
UAdminParkingSubscriptionController
UAdminParkingSubscriptionPage
UAdminParkingTariffController: Tariffs are one row per parking + vehicle type, carrying both the hourly rates and the subscription prices, so the list is short and edited in place.
UAdminParkingTariffPage
UAdminPaymentMerchantController
UAdminPaymentMerchantPage
UAdminPaymentMoadiController
UAdminPaymentMoadiPage
UAdminPaymentTerminalBrandController
UAdminPaymentTerminalBrandPage
UAdminPaymentTerminalBrokerController
UAdminPaymentTerminalBrokerPage
UAdminPaymentTerminalController
UAdminPaymentTerminalPage
UAdminPaymentUserController
UAdminPaymentUserPage
UAdminResponsiveGrid
UAdminScaffold
UAdminSettingsPage
UAdminShell
UAdminSplashController
UAdminSplashPage
UAdminTable
UAdminTheme
UAdminToolBarcodePage
UAdminToolCryptoPage
UAdminToolDatabasePage
UAdminToolFileManagerPage
UAdminToolPnPage
UAdminWalletAccountingController
UAdminWalletAccountingPage
UAdminWalletController
UAdminWalletPage
UAdminWalletTransactionController
UAdminWalletTransactionPage
UAead: Authenticated encryption over raw bytes. seal returns ciphertext ‖ tag(16).
UAlertBanner: Tinted callout used for pre-entry checks, offline notices and any other inline warning.
UAnimatedContainer: UContainer that animates size, color, radius and padding changes. UAnimatedContainer(duration: 300.ms, width: open ? 200 : 60, child: icon)
UAnimatedCounter: Counts from 0 up to value when shown (dashboards, balances). UAnimatedCounter(value: 1250, builder: (c, v) => Text(v.toInt().separate3By3()))
UAnimationCard: One side of a UFlipCard during the flip.
UApiAction
UApiCallCosts
UApiLogBucketResponse
UApiLogEndpointResponse
UApiLogJson
UApiLogReadParams
UApiLogResponse
UApiLogSelectorArgs
UApiLogStatsParams
UApiLogStatsResponse
UApp: App, device, platform, theme and language info in one place; filled by initU(). UApp.version, UApp.isAndroid, UApp.toDarkMode()
UApproveParams
UApproveResponse
UAppSettings
UAppSettingsResponse
UAppSettingsService
UAppSettingsUpdateParams
UAppState: App-wide theme and language notifiers that UMaterialApp listens to; use UApp.toDarkMode()/updateLocale() to change and save them.
UAr: Device-level AR questions and one-shot native experiences.
UArAnchor: A fixed point in the world that 3D nodes can attach to.
UArAnimation: Model animation to play (by name or index, loop, speed).
UArAvailability: AR support status of this device.
UArBody: A tracked body skeleton.
UArCameraImage: A grayscale copy of the current camera frame.
UArCapabilities: What this device's AR can do (planes, faces, depth, LiDAR, geo, recording…).
UArcGauge: Gradient progress arc with a big value in the middle. UArcGauge(value: 64)
UArChannel: Internal: the native AR channel.
UArCodeResult: A QR/barcode recognised in the camera view.
UArCodeView: Floats your own card over every QR code the camera sees. UArCodeView(cardBuilder: (c, code, p) => Text(code))
UArCodeViewState: State of UArCodeView.
UArConfig: AR session settings: mode, camera, planes, lighting, reticle, coaching, images, geo. UArConfig(reticle: true)
UArController: Drives one AR (or 3D viewer) session. Hand it to a UArView; the view creates the native session and the controller talks to it.
UAreaChart: Line chart with a gradient fill under each line. UAreaChart(series: series, categories: days)
UArExperiences: Ready-made AR screens and checks: ARCore (Android), ARKit (iOS), WebXR or camera+compass (web); desktops report unsupported. Needs permission add camera. UArExperiences.place(items: [UArPlaceable(id: "sofa", title: "Sofa", source: UArSource.asset("assets/sofa.glb"))])
UArFace: A tracked face: pose, blend shapes, mesh.
UArFaceTryOn: Front-camera face try-on with an item picker (iOS TrueDepth, Android ARCore faces). UArFaceTryOn(items: glasses)
UArFaceTryOnState: State of UArFaceTryOn.
UArForeground: Forces color on text and icons below, including UText* widgets, which read their colour from the theme's text styles rather than DefaultTextStyle.
UArFrame: Per-frame camera info (pose, intrinsics, timestamp).
UArGate: Handles availability, installation and permissions before an AR view runs, and shows a friendly screen for each failure.
UArGeo: Geographic helpers used by the GPS fallback and by location-based content.
UArGeoPose: Latitude/longitude/altitude and heading of the camera (geo AR).
UArGeoView: Camera view with floating labels over nearby places (distance, compass). Needs permission add camera location. UArGeoView(places: places)
UArGeoViewState: State of UArGeoView.
UArHitResult: Where a screen tap hits the real world.
UArHotspot: A point of interest on a model, placed in fractions of its bounding box: (0, 0.5, 0) is the top centre, (-0.5, 0, 0.5) the middle of the front-left edge.
UArImageTarget: An image to recognise (poster, package) and what to show on it.
UArImageTrigger: Shows content when the camera sees one of the target images. UArImageTrigger(targets: targets)
UArImageTriggerState: State of UArImageTrigger.
UArLabels: Optional label overrides; anything left null falls back to l10n.
UArLightEstimate: Estimated scene lighting.
UArMaterial: Surface look of a 3D node: color, metal, roughness, texture, opacity.
UArMeasure: Tape measure: tap points to measure lengths and areas (Android ARCore, iOS ARKit). UArMeasure(unit: UArMeasureUnit.metric)
UArMeasureState: State of UArMeasure; add/undo/clear points from code.
UArNativeFallback: Shown by UArExperiences.place when live AR is unavailable: opens the OS 3D/AR viewer instead.
UArNativeViewerOptions: Options for the OS 3D viewer (Quick Look / Scene Viewer): file, title, AR mode.
UArNode: Anything drawn in the scene. Positions are metres, relative to parentId when set, else to anchorId when set, else to the world origin.
UArNodeHit: A 3D node that was tapped.
UArNodeInfo: Loaded model info: size and bounds.
UArObjectCaptureOptions: Object capture options.
UArObjectCaptureResult: Result of UArExperiences.captureObject: the 3D model file.
UArOrbit: Camera placement for UArMode.viewer, orbiting target.
UArOverlay: A Flutter widget pinned to a node, an anchor or a world point.
UArOverlayLayer: Lays overlays over an AR / 3D view and keeps them glued to the world.
UArPage: Full-screen host for any AR widget.
UArPermissionState: Camera/location/microphone permission for AR.
UArPill: A rounded, translucent pill used for hints and chips.
UArPlace: A real-world place for UArGeoView: coordinates, title, optional 3D model.
UArPlaceable: Something the user can put into the world.
UArPlacedItem: An item the user placed: its node, anchor, hit point and size.
UArPlane: A detected surface: id, type, center, size, polygon.
UArPose: A rigid transform: where something is and which way it faces, in metres.
UArProjection: Where a tracked world point lands on the view, normalised 0..1.
UArQuaternion: Rotation as a quaternion.
UArRecording: A recorded AR video file.
UArReferenceImage: A picture the session should recognise in the real world (posters, logos, packaging, shop signs). physicalWidth is its printed width in metres.
UArReferenceObject: A scanned real object (.arobject, iOS only).
UArRoomItem: An object/wall/door found by a room scan.
UArRoomScanOptions: Room scan options.
UArRoomScanResult: Result of UArExperiences.scanRoom: walls, doors, furniture and a USDZ file.
UArRoundButton: Round translucent AR toolbar button.
UArScene: Full interactive AR: find surfaces, place items, move / rotate / scale them, take photos and videos. Everything is configurable and every piece of chrome can be replaced through the builders.
UArSceneOptions: Behaviour of UArScene: placement by tap or reticle, gestures, toolbar, picker, snapshot, recording.
UArSceneState: State of UArScene; reach it with a GlobalKey to place/remove/snapshot from code.
UArSource: Where a model, image, video or reference image comes from.
UArStyle: Colours and shapes of the built-in chrome. Null values follow the app theme.
UArTextResult: Text recognised in the camera view.
UArTrackedImage: A recognised image and its pose.
UArTryOnItem: A face accessory (glasses, hat, mask) for UArFaceTryOn.
UArtwork: Album art from a track's artwork reference, with placeholder. UArtwork(artwork: track.artwork, size: 56)
UArtworkCache: Memory cache of album art so lists do not decode the same picture twice.
UArtworkRef: Where artwork comes from (URL, file tag, bytes).
UArValue: Internal: a typed value exchanged with the native AR engine.
UArVector3: 3D vector (x, y, z) in metres.
UArVideoOptions: Options for recording the AR view.
UArView: The native AR / 3D surface of a UArController. Draws a GPU texture on Android, a RealityKit view on iOS and a canvas on the web; child is laid over it. Gestures are left to child so every platform behaves the same.
UArWebStartButton: On the web the immersive session must start from a tap; this shows the button.
UArWidgetRenderer: Renders a widget off-screen into PNG bytes, for textures in the scene.
UAspectRatio: Keeps a width/height ratio. UAspectRatio(aspectRatio: 16 / 9, child: video)
UAssetSource: Media from an asset.
UAsyncBuilder<T>: Loads data once and shows loading / error+retry / empty / data by itself. UAsyncBuilder<List<User>>(load: api.users, builder: (context, users) => UserList(users))
UAsyncBuilderState<T>: State of UAsyncBuilder; reach it with a GlobalKey to call reload(). key.currentState?.reload()
UAudio: One app-wide music player with a queue and a lock-screen/notification control; all 6 platforms. Background play: dart run u:app permission add background-audio. UAudio.play("https://x.com/song.mp3")
UAuth: Login session on top of ULocalStorage: JWT expiry, one-at-a-time token refresh, sign-out. UHttpClient uses it automatically. if (UAuth.isSignedIn) …
UAuthCompleteProfileParams
UAuthService
UAvatar: Round profile picture with an initials fallback while loading or without a picture. UAvatar(url: user.avatar, name: user.fullName)
UAztecDecoder: Internal: Aztec decoder.
UAztecDetector: Internal: finds Aztec codes.
UAztecDetectorResult: Internal: located Aztec code.
UAztecScanner: Internal: Aztec scanner.
UBadgePosition: Where the badge sits on the child.
UBadgePositioned: Positions a badge inside UBadgeWidget.
UBadgeState: State of UBadgeWidget.
UBadgeWidget: Puts a badge (count, dot) on a corner of any widget. UBadgeWidget(badgeContent: const Text("3"), child: const Icon(Icons.shopping_cart))
UBankAccountCreateParams
UBankAccountReadParams
UBankAccountResponse
UBankAccountSelectorArgs
UBankAccountService
UBankAccountUpdateParams
UBankInfo: An Iranian bank: nickname, English and Persian name, account number from a Sheba.
UBarChart: Vertical bar chart; several series are drawn side by side. UBarChart(series: [UChartSeries(values: [4, 7, 3])], categories: ["A", "B", "C"])
UBarcode: Draws any barcode or QR code in pure Dart (all platforms), with colors, gradient, round dots and a center logo. UBarcode(value: "https://x.com", type: UBarcodeType.qrCode, width: 200, height: 200)
UBase64Image: A decoded base64 image source: either a data:<mime>;base64,<payload> URI or a bare base64 payload whose bytes carry a known image signature.
UBase64ImagePicker: Picks one image and reports it as a base64 string (onChanged gets null when it's cleared). Shows the current image, or an "add photo" box when there is none.
UBaseController
UBaseJson
UBaseParams
UBatteryGauge: Battery/tank fill that turns lowColor below lowThreshold. UBatteryGauge(value: 18)
UBetterImageViewer: Zoomable image viewer with swipe-down to close and smooth double-tap zoom. UBetterImageViewer(fileData: file)
UBidi: Right-to-left detection helpers.
UBillInfoParams
UBillInfoResponse
UBinarizer: Converts grayscale to 1-bit. Hybrid uses local thresholds so it survives uneven lighting; the global histogram path is used per-row for 1D symbols.
UBitArray: Internal: row of bits for 1D decoding.
UBitMatrix: A 1-bit image. true means a dark module.
UBitSource: Internal: bit reader.
UBlogCreateParams
UBlogJson
UBlogReadParams
UBlogResponse
UBlogSelectorArgs
UBlogService
UBlogUpdateParams
UBubbleChart: Bubble chart: scatter where each point's size sets the bubble. UBubbleChart(data: series)
UBufferedRange: A buffered part of the media.
UBulletGauge: Compact KPI bar with zones, a measure bar and a target mark. UBulletGauge(value: 70, target: 85)
UBusinessCategories: Every Iranian business category. UBusinessCategories.categories
UBusinessCategory: One Iranian business category (MCC-like code and fa/en title).
UButton: Button with loading state, icon, sizes, full width, and a built-in "resend in 59s" countdown. UButton(title: "Save", onTap: save, isLoading: saving)
UButtonSubmitCancel: Submit + cancel buttons side by side (for forms and dialogs). UButtonSubmitCancel(onSubmit: save)
UByteReader: Internal: byte reader.
UBytesSource: Media from bytes.
UCachedByteSource: Internal: cached byte source.
UCacheStatusItem
UCamera: Camera on all 6 platforms: photos, videos, QR/barcode scanning (live and from images). Needs dart run u:app permission add camera (+ microphone for video). final code = await UCamera.scan();
UCameraCapabilities: What the currently open session can actually do. Drive UI from this rather than from the platform name.
UCameraChannel: Internal: the native camera channel.
UCameraConfig: Everything a session configures up front. Values the device cannot honour are ignored rather than failing the session.
UCameraController: Drives one native camera session. Create it, initialize it, hand UCameraValue.textureId to a Texture widget, and dispose it when done.
UCameraDevice: One camera: facing, lens, and supported sizes/features.
UCameraFormat: One selectable output configuration reported by the device.
UCameraFrame: A single analysis frame handed to Dart. planes holds one entry for packed formats and three for planar YUV.
UCameraGrid: Rule-of-thirds grid drawn over the preview.
UCameraLabels: Optional label overrides; anything left null falls back to l10n.
UCameraOptions: Full configuration of UCameraPage. Every control can be switched off, and controls the device cannot support hide themselves.
UCameraPage: The full-screen camera page used by UCamera.open (photo, video, multi-shot).
UCameraPermissionState: Camera and microphone permission state in one object.
UCameraPreview: Renders the live preview of controller. Uses a GPU texture everywhere except the web, where the browser's own video element is embedded.
UCameraRange: A numeric capability range. supported is false when the platform cannot change the value at all.
UCameraSize: Width × height of a preview/photo/video.
UCameraUtils: Helpers shared by the camera page, the scanner and any app-level UI built on UCameraController. All of it is pure Dart, so it behaves the same on every platform.
UCameraValue: Immutable snapshot of a session, exposed through UCameraController.value.
UCandle: One open/high/low/close candle. UCandle(open: 10, high: 12, low: 9, close: 11, label: "Mon")
UCandlestickChart: Candlestick chart for prices. UCandlestickChart(candles: candles)
UCapturedPhoto: A taken photo: bytes/path, size, EXIF.
UCapturedVideo: A recorded video: path, size, duration.
UCard: Material card with u's box, tap and flex options. UCard(onTap: open, child: content)
UCardBrandDetector: Detects card brand/bank from the first digits and gives its colors.
UCarousel<T>: Carousel of any items with peeking neighbours, loop, auto play and dots. UCarousel<Product>(items: products, itemBuilder: (c, p, i) => ProductCard(p))
UCarouselController: Moves a UCarousel from code and controls auto play.
UCategoryCreateParams
UCategoryJson
UCategoryReadParams
UCategoryResponse
UCategorySelector: Two drop-downs: a category and its sub-category (from U.categories). UCategorySelector(onCategorySelected: (c) {}, onSubCategorySelected: (s) {})
UCategorySelectorArgs
UCategoryService
UCategoryUpdateParams
UCenter: Center with size factors. UCenter(child: logo)
UChaCha20Poly1305: RFC 8439 ChaCha20-Poly1305 over raw bytes. Output of seal is ciphertext ‖ tag(16). Native only — see the file header.
UChargeInternet
UChargeInternetPreDefinedAmounts
UChargeInternetReserveResponse
UChargeInternetService
UCharsetDecoder: Decodes byte segments using the declared ECI charset, with a UTF-8 then Latin-1 fallback when no ECI is present.
UChartAnimator: Rebuilds builder with an animated progress value from 0 to 1 on mount.
UChartPoint: One (x, y) point; size sets the bubble size in bubble charts. UChartPoint(x: 1, y: 3)
UChartSeries: One named line/bar series of Y values over the shared categories. UChartSeries(name: "Sales", values: [3, 5, 2, 8])
UChartStyle: Shared look of every chart; null fields follow the theme. UChartStyle(showLegend: true, valueFormatter: (v) => v.toInt().toString())
UChecksum: Expected hash to verify a finished download.
UChipChoice<T>: Single or multi select chips. UChipChoice<String>(options: const ["A", "B"], selected: "A", onChanged: (i, on, item) {})
UCircularPercentIndicator: Animated circular progress with a center widget. UCircularPercentIndicator(radius: 40, percent: 0.7, center: const Text("70%"))
UCity: A city.
UClipboard: Copy and paste text on all 6 platforms (web: needs a user gesture and, for reading, browser permission). UClipboard.set(code, snackBar: true)
UCodabarReader: Internal: Codabar reader.
UCode: One decoded symbol.
UCode128Patterns: Internal: Code 128 patterns.
UCode128Reader: Internal: Code 128 reader.
UCode39Patterns: Internal: Code 39 patterns.
UCode39Reader: Internal: Code 39 reader.
UCode93Patterns: Internal: Code 93 patterns.
UCode93Reader: Internal: Code 93 reader.
UCodeReader: Pure-Dart QR/barcode reader for pixels or images (used by UCamera.scanImage/decodePixels).
UCodeScanOptions: Options for scanning images: formats, multiple codes, invert, rotations, speed. UCodeScanOptions(multiple: true)
UCodeScanWorker: Decodes frames off the UI isolate. One worker is shared by every controller.
UCodeStructuredAppend: Part info when a QR is split over several codes.
UCodeValue: Classifies and splits common QR payload conventions.
UColumn: Column with gap spacing, box decoration, tap and flex options. UColumn(spacing: 8, children: [a, b, c])
UCommentCreateParams
UCommentJson
UCommentReacts
UCommentReadParams
UCommentResponse
UCommentSelectorArgs
UCommentService
UCommentUpdateParams
UCompassGauge: Compass dial; value is the heading in degrees (0 = north). UCompassGauge(value: heading)
UConnectivity: Engine behind UNetwork; use UNetwork instead.
UConstants: Storage key names used by ULocalStorage and UAuth; change them before initU() if your app needs other names.
UConstrained: Applies min/max width and height. UConstrained(maxWidth: 600, child: form)
UContainer: Container with everything built in: radius, border, gradient, shadow, tap/press/hover, tooltip, hero, fit, flex, position. UContainer(radius: 12, color: Colors.white, padding: const EdgeInsets.all(16), onTap: open, child: Text("Card"))
UContentBentoPage: Bento-grid page for a UContentResponse (about us, landing).
UContentCreateParams
UContentItem
UContentJson
UContentLink
UContentReadParams
UContentResponse
UContentSelectorArgs
UContentService
UContentSource: Media from an Android content URI.
UContentUpdateParams
UConvert: Data format conversions in pure Dart: JSON pretty/minify, JSON⇄XML, JSON⇄CSV, Map⇄query string. UConvert.prettyJson(body)
UCopyText: Text that copies itself (or copyValue) on tap and says "Copied". UCopyText("IR12 3456 …", copyValue: iban)
UCountries: Every country with provinces and cities (Iran in full). UCountries.iran(), UCountries.byIsoCode("DE")
UCountry: A country: names, ISO codes, dial code, flag, currency, provinces.
UCountryCityInfo: Country + province + city picked together.
UCountryFlag: Flag image of a country (bundled with u). UCountryFlag(country: UCountries.iran())
UCountryProvincePicker: Country → province → city drop-downs (Iran data built in). UCountryProvincePicker(onCityChanged: (c) => city = c)
UCrashlytics: Catches every uncaught Dart/Flutter error with app, device and screen info, so you can send it to your server. UCrashlytics.initialize(onCrash: (report) => api.logCrash(report))
UCreditCardForm: Card number / expiry / holder / CVV fields that fill a UCreditCardModel. UCreditCardForm(model: model, onChanged: (m) => setState(() {}))
UCreditCardModel: Card details typed in UCreditCardForm (number, expiry, holder, CVV).
UCreditCardWidget: Animated bank card that flips to the back for CVV, with brand colors. UCreditCardWidget(cardNumber: n, expiryDate: e, cardHolderName: h, cvvCode: c, showBackView: false)
UCropAspectRatio: Aspect ratio option shown in the cropper toolbar. A null ratio means the crop box can be resized freely.
UCropOptions: How the cropper opens: shape, aspect ratio(s), max size, rotate/flip/adjust tools. UCropOptions(aspectRatio: 1, shape: UCropShape.circle)
UCurrencyInputFormatter: Groups thousands as you type (1,250,000). UTextField(formatters: [UCurrencyInputFormatter()])
UDashAdaptationSet: DASH track group.
UDashboardRangeParams
UDashboardResponse
UDashboardService
UDashContentProtection: DASH DRM info.
UDashManifest: Parsed DASH manifest.
UDashParser: Parses DASH manifests.
UDashPeriod: DASH period.
UDashRepresentation: DASH quality.
UDashSegmentRef: DASH segment reference.
UDashSegmentTemplate: DASH segment template.
UDataMatrixBitMatrixParser: Strips the alignment patterns and reads the codewords of a sampled symbol.
UDataMatrixDecodedBitStream: Internal: DataMatrix decoder.
UDataMatrixScanner: Internal: DataMatrix scanner.
UDataMatrixVersion: Internal: DataMatrix version table.
UDate: Base of UJalali and UGregorian: y/m/d/time, Julian day, comparison and math.
UDateFormatter: Pieces of a date as text (y, yyyy, mm, mN month name, wN weekday…); get one from date.formatter.
UDbAdminColumnResponse
UDbAdminDeleteRowParams
UDbAdminForeignKeyResponse
UDbAdminIndexResponse
UDbAdminInsertRowParams
UDbAdminQueryParams
UDbAdminQueryResultResponse
UDbAdminRowsParams
UDbAdminService
UDbAdminTableResponse
UDbAdminTableSchemaParams
UDbAdminTableSchemaResponse
UDbAdminTablesParams
UDbAdminUpdateRowParams
UDebouncer: Runs only the last call after a quiet delay, e.g. search-as-you-type. final UDebouncer d = UDebouncer(delay: 400.ms); d.run(search);
UDecodedText: Text decoded from bytes and the detected encoding.
UDefaultTabBar: Tab bar + swipeable pages in one widget. UDefaultTabBar(tabBar: const TabBar(tabs: [Tab(text: "A"), Tab(text: "B")]), children: [PageA(), PageB()])
UDemoMap: A ready demo map to try UMap quickly.
UDependencyRule
UDevice: Engine behind the device part of UApp; use UApp instead.
UDeviceInfo: Device facts (model, OS, id, locales, time zone…) — see UApp.deviceInfo.
UDeviceIntegrity: Signals that the app may be running somewhere it cannot trust. Heuristics, not proof: use them to add friction (re-auth, block payments), not to crash.
UDeviceStatus: Values that change while the app runs; read with UDevice.status.
UDivider: Horizontal or vertical line. const UDivider(), const UDivider(axis: Axis.vertical)
UDocAnnotationController: Owns every markup and bookmark of one document.
UDocAnnotationsPanel: Searchable list of every markup and note, grouped per selection.
UDocBidi: Recovers logical (reading) order from visually ordered text pieces.
UDocBookmark: A bookmarked page (PDF) or reading position (EPUB).
UDocBookmarksPanel: List of bookmarked pages / positions.
UDocByteSource: Internal: random-access bytes of a document.
UDocColorBar: A row of colour swatches.
UDocColorFilters: Color matrices for night/sepia/grayscale modes.
UDocController: Base controller shared by the PDF and EPUB viewers.
UDocCursor: Internal: reader over bytes.
UDocDestination: A place inside a document (page + position).
UDocDrawController: Tool and style state shared by the toolbar and every UDocShapeLayer.
UDocDrawToolbar: Tool palette + style controls for UDocShapeLayers.
UDocGlyph: Internal: one positioned character.
UDocImageCache: Internal: decoded image cache.
UDocLibrary: Recently opened documents.
UDocLink: A link on a page (URL or internal destination).
UDocMarkup: One highlight / underline / note… anchored to a PDF page or an EPUB block.
UDocMarkupMenu: Actions for an existing markup (recolour, change style, note, copy, delete).
UDocMarkupPainter: Paints markup geometry. Shared by the PDF page overlay and the EPUB text overlay.
UDocMetadata: Document info: title, author, subject, keywords, pages, dates, producer.
UDocNormalizedText: Internal: text normalised for search (Persian/Arabic letters, digits).
UDocNoteEditor: Opens the note editor dialog.
UDocOutlineNode: One table-of-contents entry.
UDocPageInfo: Page size and rotation.
UDocPalette: Colors offered for highlights and notes.
UDocPermissions: What the document allows (print, copy, edit…).
UDocPictureCache: Internal: rendered page cache.
UDocProgress: Reading progress of a document.
UDocProgressStore: Saves reading progress per document.
UDocRecord: A document in the recent list.
UDocSearchHit: One search match.
UDocSearchOptions: Search options: case, whole word, regex.
UDocSelection: A text selection.
UDocSelectionMenu: Floating actions shown for a fresh text selection.
UDocShape: One drawn shape. Geometry is normalised (see UDocShapeSpace) so it survives zoom, window resizes and EPUB re-flow.
UDocShapeGeometry: Converts normalised shape geometry to pixels on a surface of size.
UDocShapeLayer: Paints shapes and, when a tool is active, lets the user draw, type, select, move, resize and erase them. Sized by its parent.
UDocShapePainter: Paints drawing shapes (pen, arrow, box…).
UDocSources: Makes a byte source from a file/bytes/url/asset.
UDocText: Internal: text helpers.
UDocTextIndex: Internal: full-text search index.
UDocTextPage: All text of a page with positions (for search and selection).
UDocTextRun: Internal: a run of text on a page.
UDocValue: Internal: a PDF/EPUB value.
UDocViewSettings: Viewer settings (scroll mode, spread, fit, color mode).
UDocWatermark: Repeated user identification drawn over document pages (e.g. for course material).
UDocWatermarkLayer: Places watermark copies at deterministic pseudo-random spots for pageIndex.
UDonutChart: Donut chart with an optional center text (e.g. the total). UDonutChart(slices: slices, centerText: "100")
UDormBedContractCreateParams
UDormBedContractReadParams
UDormBedContractResponse
UDormBedContractSelectorArgs
UDormBedContractUpdateParams
UDormBedCreateParams
UDormBedInvoiceChartResponse
UDormBedInvoiceCreateParams
UDormBedInvoiceJson
UDormBedInvoiceReadParams
UDormBedInvoiceResponse
UDormBedInvoiceSelectorArgs
UDormBedInvoiceUpdateParams
UDormBedJson
UDormBedReadParams
UDormBedResponse
UDormBedSelectorArgs
UDormBedUpdateParams
UDormCreateParams
UDormJson
UDormReadParams
UDormResponse
UDormRoomCreateParams
UDormRoomJson
UDormRoomReadParams
UDormRoomResponse
UDormRoomSelectorArgs
UDormRoomUpdateParams
UDormSelectorArgs
UDormUpdateParams
UDownloadButton: A one-tap download control: idle → progress ring (tap to pause/resume) → done (tap to open).
UDownloadConfig: Download manager settings: connections, concurrency, speed limit, retries, Wi-Fi only, notifications.
UDownloadDestination: Where a download ends up.
UDownloadFileNames: File-name helpers: Content-Disposition parsing, sanitising, extensions and categories.
UDownloadManager: The download engine behind UDownloads; use UDownloads instead.
UDownloadManagerPage: Full-screen download manager: filters, categories, live speed, bulk actions and settings.
UDownloadPlatform: Where a finished download is handed to the user.
UDownloadRequest: What to download: url, target, headers, checksum, priority, connections. UDownloadRequest(url: url, fileName: "a.zip")
UDownloads: Resumable, multi-connection downloads with a queue, notifications and restart recovery, on all 6 platforms (web: browser download). final task = await UDownloads.download(url);
UDownloadSegment: A byte range fetched by one connection. end is exclusive; -1 when the size is unknown.
UDownloadSettingsSheet: Global download settings: concurrency, connections per download and a speed cap.
UDownloadTask: A download: status, progress, speed, ETA, bytes, file path.
UDownloadTile: One task: icon, name, status, a segment-aware progress bar, speed/ETA and actions.
UDrivingLicenceDetailParams
UDrivingLicenceDetailResponse
UDrivingLicenceNegativePointParams
UDrivingLicenceNegativePointResponse
UDrmConfig: DRM license settings.
UDropDownConfig
UDropDownField<T>: Drop-down in text-field style, with validator. UDropDownField<int>(initialValue: 1, items: const [DropdownMenuItem(value: 1, child: Text("One"))], onChanged: (v) {})
UDynamicOptionsConfig
UEan8Reader: EAN-8 uses the same guards but eight digits with no parity encoding.
UEchoResponse
UEditorBlock: One block in the editor document.
UEditorDialogs: Dialogs used by both editors.
UEditorDropdown<T>: A compact bordered dropdown used for the block-type and font pickers.
UEditorMenuEntry<T>: One entry of a UEditorDropdown.
UEditorStyles: Shared visual styling for editor blocks (used by the editors and UHtmlView).
UEditorToolButton: Toolbar widgets and dialogs shared by URichTextEditor and Toolbar widgets and dialogs used by URichTextEditor. Nothing here holds editor state — every helper takes what it needs and returns a plain result. A single square toolbar button with an active/selected state.
UEditorToolSeparator: A thin vertical rule between toolbar groups.
UEmptyResponse
UEmptyState: "No data" message with optional icon, second line and action button. UEmptyState(icon: Icons.inbox, title: "No orders yet", action: UButton(title: "Shop", onTap: shop))
UEncryption: Hashes, encryption, key derivation and encoders, pure Dart on all 6 platforms. UEncryption.sha256Hash("hi")
UEpub: EPUB shortcuts: metadata, cover image and full text; pure Dart, all platforms. await UEpub.cover(url: url)
UEpubArchive: Internal: reads the EPUB zip.
UEpubBlock: A paragraph/heading/image of a chapter.
UEpubBlockBuilder: Internal: turns XHTML into blocks.
UEpubBlockView: One EPUB block (or the part of it on the current page) with markups painted in.
UEpubBook: An opened EPUB: metadata, chapters, resources, table of contents.
UEpubChapter: One chapter as blocks.
UEpubController: Controls an EPUB reader: chapters, pages, typography, search.
UEpubDigest: Internal: hashes for EPUB ids.
UEpubHighlight: A highlight in the book.
UEpubImageView: An image inside an EPUB.
UEpubNode: Internal: an XHTML node.
UEpubPage: One laid-out page.
UEpubPaginator: Internal: splits chapters into pages.
UEpubPosition: A reading position (chapter + block + offset).
UEpubReader: Full EPUB reader in pure Dart (all platforms): chapters, fonts, themes, search, highlights, notes, drawing, resume position. UEpubReader(url: "https://x.com/book.epub")
UEpubReaderState: State of UEpubReader; use a GlobalKey to control it.
UEpubResource: A file inside the book (image, css, font).
UEpubRule: Internal: a CSS rule.
UEpubSearchHit: A search match inside one EPUB block.
UEpubSelectorPart: Internal: a CSS selector part.
UEpubSettingsPanel: Reading settings (font, size, spacing, theme, margins).
UEpubSlice: A contiguous piece of one block: the whole block, or the part that fits on a page.
UEpubSpan: Styled text inside a block.
UEpubSpineItem: A chapter in reading order.
UEpubStyleSheet: Internal: parsed CSS.
UEpubTextStyler: Builds the exact TextSpan a block is rendered with, so pagination, highlight painting and hit-testing all agree on the same layout.
UEpubTypography: Reading font, size, line height, margins and alignment.
UEpubXml: Internal: XML parser.
UEpubZipEntry: Internal: a file inside the EPUB zip.
UEqualizer: Audio equalizer for a player (Android only; available is false elsewhere). final eq = UEqualizer(UAudio.controller); await eq.setBand(0, 3)
UEqualizerBand: One equalizer band: center frequency and gain in dB.
UEqualizerSheet: Bottom sheet with equalizer sliders and presets (Android).
UEqualizerState: Equalizer state: bands, presets, bass boost, virtualizer, loudness.
UErrorRetry: "Error loading data" text with a Try again button. UErrorRetry(onTap: reload)
UExpiringContractItem
UExternalSubtitle: A subtitle file added to a video (URL or path). UExternalSubtitle(uri: "https://x.com/fa.srt", language: "fa")
UFieldGroup
UFieldPair: Two form fields side by side, stacked on narrow (phone-width) screens.
UFile: Pick, capture, crop, store, open and share files on all 6 platforms. final UFileData? img = await UFile.pickSingleImage();
UFileByteSource: Internal: bytes from a file.
UFileConfig
UFileData: A picked or captured file: bytes, name, extension, url or id. file.bytes, file.name, file.isImage
UFileManagerBrowseParams
UFileManagerCreateFolderParams
UFileManagerDeleteParams
UFileManagerEntryResponse
UFileManagerListResponse
UFileManagerMoveParams
UFileManagerRenameParams
UFileManagerService
UFileManagerUploadParams
UFilePicker: The one widget for selecting multiple files: new picks, already-uploaded files, categories and a cover.
UFilePickerCategory: A tag/category (e.g. TagMedia) users can assign to picked files.
UFilePickerController: State of a UFilePicker: already-uploaded files, newly picked files, removals and the cover.
UFilesChannel: Engine behind UFile's native calls; use UFile instead.
UFileSource: Media from a file.
UFileStorage: Engine behind the storage part of UFile; use UFile instead.
UFilterDialog: A filter dialog: "Filter" closes it and runs onApply, "Clear filters" closes it and runs onClear.
UFinancialOpsDashboardResponse
UFindReplaceRequest: The result of the find & replace dialog.
UFlipCard: Card that flips to show its back on tap or from code. UFlipCard(front: const Text("Q"), back: const Text("A"))
UFlipCardController: Flips a UFlipCard from code.
UFlipCardState: State of UFlipCard.
UFloatingMiniPlayer: Small draggable floating player (keeps playing while browsing).
UFlowMetadata
UFollowerFollowingCountResponse
UFollowParams
UFollowService
UFormDialog: A dialog around a Form: Submit validates it, runs onSubmit with a loading button, and closes the dialog when onSubmit returns true. Without onSubmit it is view-only and shows a Close button.
UFreewayTollsItem
UFreewayTollsParams
UFreewayTollsResponse
UFunnelChart: Funnel chart for conversion steps (largest first). UFunnelChart(slices: steps)
UGaloisField: Internal: Reed-Solomon math.
UGaugeBand: A colored zone on a gauge, e.g. green 0-60, red 80-100. UGaugeBand(start: 80, end: 100, color: Colors.red)
UGaugeStyle: Shared look of every gauge; null fields follow the theme.
UGeofence: A circle to watch for enter/exit. UGeofence(id: "home", latitude: 35.7, longitude: 51.4, radius: 200)
UGeofenceEvent: An enter/exit event of a geofence.
UGetBalanceResponse
UGetMobileVerificationCodeForLoginParams
UGetStatusParams
UGetStatusResponse
UGfPoly: Reed-Solomon over a power-of-two field (QR, Data Matrix, Aztec).
UGlassCard: Frosted-glass card (blurs what is behind it). UGlassCard(child: content)
UGoldAccountResponse
UGoldApiTokenResponse
UGoldAssetBalanceResponse
UGoldBalanceResponse
UGoldBuyParams
UGoldCreateApiTokenParams
UGoldCreateOrderParams
UGoldCreditFacilitiesResponse
UGoldCreditFacilityResponse
UGoldCreditLimitResponse
UGoldDeleteApiTokenParams
UGoldOrderFeeResponse
UGoldOrderListResponse
UGoldOrderResponse
UGoldOrderTransactionResponse
UGoldQuoteParams
UGoldQuoteResponse
UGoldReadBalanceParams
UGoldReadOrderParams
UGoldReadOrdersParams
UGoldReadTransactionsParams
UGoldReadUserBalanceParams
UGoldReadUserTxnsParams
UGoldSellParams
UGoldService
UGoldTradeLimitResponse
UGoldTradeLimitsResponse
UGoldTransactionListResponse
UGoldTransactionResponse
UGoldTxnJson
UGoldTxnResponse
UGoldTxnSelectorArgs
UGoldUserBalanceResponse
UGoldWalletEntryResponse
UGrayImage: An 8-bit grayscale view over a frame or image, with cheap crop/rotate/scale.
UGregorian: Gregorian date that converts exactly to/from Jalali. UGregorian(2024, 3, 20).toJalali()
UGregorianFormatter: English month/weekday names for UGregorian.
UGridSampler: Internal: samples code modules from pixels.
UGridView: GridView by column count or max tile width. UGridView(crossAxisCount: 2, itemCount: items.length, itemBuilder: (c, i) => Tile(items[i]))
UGroupedBarChart: Bars grouped per category (same as UBarChart with several series).
UHasher: Incremental message digest. Call add any number of times, then close once.
UHeaderCard: Card with an icon, title and subtitle (page intro). UHeaderCard(icon: Icons.info, title: "Hi", subtitle: "Welcome")
UHeading: Compass reading: degrees from north, accuracy.
UHeatmapChart: Heatmap of a matrix with row/column labels. UHeatmapChart(matrix: [[1, 2], [3, 4]])
UHistogramChart: Histogram: counts how many values fall into each of bins ranges. UHistogramChart(data: ages, bins: 8)
UHlsKey: HLS encryption key.
UHlsMasterPlaylist: HLS master playlist.
UHlsMediaPlaylist: HLS media playlist.
UHlsParser: Parses HLS playlists.
UHlsPlaylist: Parsed HLS playlist (master or media).
UHlsRendition: HLS alternative audio/subtitle track.
UHlsSegment: HLS media segment.
UHlsVariant: HLS quality variant.
UHorizontalBarChart: Horizontal bar chart, good for long labels. UHorizontalBarChart(series: series, categories: names)
UHotelCreateParams
UHotelInvoiceCreateParams
UHotelInvoiceJson
UHotelInvoiceReadParams
UHotelInvoiceResponse
UHotelInvoiceSelectorArgs
UHotelInvoiceUpdateParams
UHotelJson
UHotelReadParams
UHotelReservationBookParams
UHotelReservationCancelParams
UHotelReservationCreateParams
UHotelReservationJson
UHotelReservationReadParams
UHotelReservationResponse
UHotelReservationSelectorArgs
UHotelReservationUpdateParams
UHotelResponse
UHotelRoomAvailabilityParams
UHotelRoomAvailabilityResponse
UHotelRoomCreateParams
UHotelRoomJson
UHotelRoomReadParams
UHotelRoomResponse
UHotelRoomSelectorArgs
UHotelRoomUpdateParams
UHotelSelectorArgs
UHotelService
UHotelUpdateParams
UHtmlDocument: Serializes editor blocks to clean semantic HTML and parses HTML back into blocks. Pure Dart, no external dependencies.
UHtmlView: Read-only renderer that draws stored HTML with native Flutter widgets, so it works on every platform without a WebView. It shares the parser and styling used by URichTextEditor, so what you edit is exactly what you see.
UHttpClient: HTTP with retries, offline/cache, upload/download progress, and automatic token refresh on expired tokens. UHttpClient.send(method: "GET", endpoint: "$base/users", onSuccess: …, onError: …, onException: …)
UHttpClientResponse: Result of UHttpClient.send: exactly one of response (body), error (body) or exception (message) is set.
UHttpRangeByteSource: Internal: bytes from a URL with range requests (opens big PDFs without downloading all).
UIBanToBankAccountDetailParams
UIBanToBankAccountDetailResponse
UIconBackground: Icon in a tinted rounded square. UIconBackground(Icons.wallet, color: Colors.teal)
UIconPrimary: Icon-sized UImage tinted with the theme's primary color (SVG/PNG icons). UIconPrimary("assets/icons/home.svg", width: 24)
UIcons: Brand icons bundled with u (SVG asset paths). SvgPicture.asset(UIcons.telegram, package: "u")
UIconTextHorizontal: Icon/leading widget next to text/trailing widget, with spacing and box options. UIconTextHorizontal(leading: const Icon(Icons.phone), trailing: const Text("0912…"))
UIconTextVertical: Leading widget above trailing widget, with spacing and box options.
UIdListParams
UIdParams
UIdStringParams
UiKitView: Embeds an iOS view in the Widget hierarchy.
UiKitViewController: Controller for an iOS platform view.
UImage: One widget for any image: asset, URL (cached), SVG, Lottie (.json), base64 (raster/SVG/Lottie) or UFileData, with u's box and tap options. UImage("https://x.com/a.jpg", width: 80, height: 80, borderRadius: 12)
UImageAsset: Asset image (PNG/JPG/WebP/SVG by extension). UImageAsset("assets/logo.png", width: 120)
UImageBackground: Image/icon asset in a tinted rounded square.
UImageCropper: Image cropper page (ratios, rotate, flip, brightness/contrast/saturation; pure Dart, all platforms) that pops the cropped bytes; UFile.cropImage wraps it. final Uint8List? out = await UNavigator.push<Uint8List>(UImageCropper(bytes: imageBytes))
UImageFile: Image from a File on disk (not on web). UImageFile(File(path))
UImageGalleryViewer: Swipeable full-screen gallery of zoomable images. UImageGalleryViewer(files: photos, initialIndex: 2)
UImageMemory: Image from bytes in memory. UImageMemory(bytes, width: 100)
UImageNetwork: Network image with disk cache and placeholder (SVG by extension). UImageNetwork(url, width: 64, height: 64)
UImageViewer: Full-screen zoomable image (pinch, double-tap, hero). UNavigator.push(UImageViewer(fileData: UFileData(url: url)))
UInfoRow: Label on one side, value on the other. The building block of receipts, bills and detail sheets.
UInquiryCacheStatusParams
UInquiryCacheStatusResponse
UInquiryService
Uint8List: A fixed-length list of 8-bit unsigned integers.
UInternetListParams
UInternetPackageItem
UInternetPackageResponse
UInternetReserveParams
UIpgAdditionalData
UIpgBrowserController
UIpgBrowserPage
UIpgFlow
UIpgMultiplexedAccountParams
UIpgPayParams
UIpgPayResponse
UIpgService
UIpgWebViewController
UIpgWebViewPage
UIso: ISO8583 (POS/switch) setup, like U.baseUrl for REST: host config, terminal context, security module, trace counter. UIso.init(config: c, context: ctx, securityModule: hsm, nextTraceNumber: nextStan)
UIsoClient: Sends one ISO8583 message and waits for the answer, filling trace number, date/time, terminal id, TLVs and MAC. UIsoClient.send(mti: "0200", processingCode: "000000", onSuccess: ok, onError: err, onException: fail)
UIsoResult: The host's answer to UIsoClient.send (like an HTTP Response): response code, fields, TLV tags.
UItfReader: Internal: ITF reader.
UJalali: Jalali (Shamsi/Persian) date with exact conversion to/from Gregorian. UJalali.now().formatFullDate(), UJalali(1403, 1, 1).toDateTime()
UJalaliDatePicker: Jalali (Persian) date picker dialogs and helpers. final UJalali? d = await UJalaliDatePicker.show();
UJalaliDatePickerDialog: Classic Jalali date picker dialog.
UJalaliDatePickerMaterial: Material-style Jalali calendar picker.
UJalaliDatePickerSpinner: Jalali picker with year/month/day wheels.
UJalaliFormatter: Jalali names: Persian, Afghan (حمل، ثور…) and Latin month/weekday names.
UJbig2: Internal: decodes JBIG2 images in scanned PDFs.
UJbig2ArithmeticDecoder: Internal: JBIG2 arithmetic decoder.
UJbig2ArithmeticDecoderTables: Internal: JBIG2 tables.
UJbig2Bitmap: Internal: JBIG2 image.
UJbig2GenericRegion: Internal: JBIG2 region decoder.
UJbig2Segment: Internal: JBIG2 segment.
UJsonViewer: Collapsible, colored JSON tree (debug screens, API logs). UJsonViewer(jsonString: body)
UKeyValue: Key on one side, value on the other (spaceBetween), with box options. UKeyValue(leading: const Text("Price"), trailing: Text(price.toman()))
UKeyValueData
ULaunch: Opens URLs, apps, settings, stores, maps, messengers, email/SMS/call screens; OAuth sign-in; deep links. All 6 platforms, returns false instead of crashing. ULaunch.url("https://x.com")
ULaunchChannel: Engine behind ULaunch; use ULaunch instead.
ULetterBadge: Small rounded square with the first letter of label (avatars, steps). ULetterBadge("Sina", background: Colors.teal, foreground: Colors.white)
ULicencePlateDetailParams
ULicencePlateDetailResponse
ULicencePlateHistoryItem
ULinearGauge: Horizontal gauge with a pointer and zones. ULinearGauge(value: 30)
ULinearPercentIndicator: Animated progress bar with leading/trailing/center widgets. ULinearPercentIndicator(percent: 0.4, lineHeight: 8)
ULinearScanner: Scans a bit matrix row by row for every enabled linear symbology.
ULineChart: Line chart for one or more series; smooth curves, filled shades under lines. ULineChart(series: [UChartSeries(values: [1, 3, 2])], categories: ["Jan", "Feb", "Mar"])
UListEditor<T>: Edits a list of items: one card per item with a text field per fields entry, a delete button and an add button. toItem builds an item from a row's trimmed texts (in fields order); returning null leaves the row out.
UListEditorField<T>: One text field of a UListEditor row.
UListTile: Card list row with a tinted icon, title, subtitle and arrow. UListTile(icon: Icons.person, title: "Profile", onTap: open)
UListView: ListView with separators, box options and shrinkWrap. UListView(itemCount: items.length, itemBuilder: (c, i) => Text(items[i]))
ULoading: Full-screen blocking loader over the whole app, from anywhere; UHttpClient-based services show it for you. ULoading.show(); await save(); ULoading.dismiss();
ULoadingSettings: Look of the ULoading overlay: spinner or image/Lottie, text, blur, colors, percent. initU(loadingSettings: const ULoadingSettings(text: "Please wait"))
ULocalStorage: Fast key/value storage on all 6 platforms; tokens are encrypted automatically (Keychain/Keystore-backed key; web: sealed in IndexedDB). ULocalStorage.set("name", "Sina"); ULocalStorage.getString("name")
ULocation: GPS position, live tracking, permissions, geofences, compass and addresses on all 6 platforms, no Google Play Services. Needs dart run u:app permission add location. final UPosition? p = await ULocation.position();
ULocationChannel: Engine behind ULocation; use ULocation instead.
ULocationMath: Geodesic helpers (WGS-84 sphere).
ULocationPermission: Location permission, precise/approximate and whether GPS is on.
ULocationResult: Outcome of a one-shot location request: a position or the reason there is none.
ULocationSettings: Live tracking options: accuracy, distance filter, interval, background, activity. const ULocationSettings(distanceFilter: 10)
ULoginParams
ULoginResponse
ULruCache<K, V>: Internal: least-recently-used cache.
ULyrics: Song lyrics, synced (LRC) or plain. ULyrics.fromText(lrcText)
ULyricsView: Scrolling lyrics that highlight the current line; tap a line to seek. ULyricsView(controller: UAudio.controller, lyrics: lyrics)
UMap: Map with markers, my-location button and tile providers (flutter_map, all platforms). UMap(controller: MapController(), center: const LatLng(35.7, 51.4))
UMaterialApp: MaterialApp wired for u: navigatorKey, fa/en localizations, saved theme and language that switch live. UMaterialApp(locale: const Locale("fa"), home: const HomePage(), lightThemeData: light, darkThemeData: dark)
UMCITopOfferParams
UMedia: Native audio/video players on all 6 platforms (ExoPlayer, AVPlayer, Media Foundation, GStreamer, HTML5), plus subtitles, tags, HLS/DASH parsing, music library and playlists. final c = await UMedia.playUrl(url);
UMediaChannel: Internal: the native media channel.
UMediaConfig: Player settings: buffering, hardware decoding, audio focus, wake lock, notification. UMediaConfig.music
UMediaController: One native player: open, play, pause, seek, queue, speed, tracks, PiP, notification. final c = UMedia.video(); await c.open(UMedia.network(url)); c.play();
UMediaCreateParams
UMediaLibrary: The on-device music library index (see UMedia).
UMediaMetadata: Title, artist, album, artwork and duration (shown on the lock screen). const UMediaMetadata(title: "Song", artist: "Me")
UMediaNote: A note pinned to a moment (or a range) of a video / audio track.
UMediaNotes: Shortcuts for media notes.
UMediaNotesController: Owns the time-stamped notes of one media item, with persistence, undo/redo and a transport-safe export/import for server sync.
UMediaNotesPanel: Searchable list of time-stamped notes; tapping a note seeks the player.
UMediaPipSwitcher: Shows pip instead of child while the controller is in picture-in-picture (on Android the whole activity shrinks into the PiP window).
UMediaQueueSheet: Bottom sheet listing the play queue (tap to jump, drag to reorder, swipe to remove).
UMediaReadParams
UMediaResponse
UMediaResume: Remembers where playback stopped for each media item.
UMediaSelectorArgs
UMediaService
UMediaSession: Lock-screen / notification media controls session.
UMediaSource: What to play: network, file, asset, bytes or content URI (see UMedia.network…).
UMediaTrack: An audio/video/subtitle track.
UMediaTrackSheet: Bottom sheet to pick a video quality, audio track or subtitle.
UMediaUpdateParams
UMediaValue: Player state snapshot: state, position, duration, buffered, volume, speed, tracks.
UMemoryByteSource: Internal: bytes in memory.
UMenuEntry: Base of side-menu rows: UMenuItem, UMenuGroup, UMenuHeader.
UMenuGroup: Collapsible group of items. UMenuGroup(id: "settings", title: "Settings", icon: Icons.settings, children: [UMenuItem(id: "profile", title: "Profile", icon: Icons.person)])
UMenuHeader: Section title in the side menu. const UMenuHeader("Reports")
UMenuItem: One side-menu row. UMenuItem(id: "users", title: "Users", icon: Icons.people)
UMerchantBindParams
UMerchantCreateParams
UMerchantJson
UMerchantReadParams
UMerchantResponse
UMerchantSelectorArgs
UMerchantService
UMessageBox
UMiniPlayerBar: Slim "now playing" bar with artwork, title and play/pause (put it above your bottom navigation). UMiniPlayerBar(controller: UAudio.controller, onTap: openPlayer)
UMoadiCreateParams
UMoadiJson
UMoadiReadParams
UMoadiRejectParams
UMoadiResponse
UMoadiSelectorArgs
UMoadiService
UMoadiUpdateParams
UModulusPoly: Modulo-929 Reed-Solomon used by PDF417, which is not a binary field.
UMovingWatermark: A watermark that drifts to a new random spot every interval.
UMusicPlayer: Complete music player UI (artwork, seek bar, controls, queue, lyrics, equalizer, sleep timer); uses UAudio when no controller is given. UMusicPlayer(layout: UMusicPlayerLayout.card)
UMusicPlayerTheme: Which parts UMusicPlayer shows and how big they are.
UNavAction: One row of UNavigator.actionSheet: label, icon, destructive style, enabled.
UNavigator: Navigation, dialogs, sheets, pickers and overlays from anywhere, no BuildContext needed (uses navigatorKey). UNavigator.push(ProfilePage())
UnconstrainedBox: A widget that imposes no constraints on its child, allowing it to render at its "natural" size.
UnconstrainedCamera: Does not apply any constraint to a MapCamera
UnderlineInputBorder: Draws a horizontal line at the bottom of an InputDecorator's container and defines the container's shape.
UnderlineTabIndicator: Used with TabBar.indicator to draw a horizontal line below the selected tab.
UndoHistory<T>: Provides undo/redo capabilities for a ValueNotifier.
UndoHistoryController: A controller for the undo history, for example for an editable text field.
UndoHistoryState<T>: State for a UndoHistory.
UndoHistoryValue: Represents whether the current undo stack can undo or redo.
UndoManager: A low-level interface to the system's undo manager.
UndoTextIntent: An Intent that represents a user interaction that attempts to go back to the previous editing state.
UNetwork: Connection state on all 6 platforms: online, wifi/cellular/vpn, metered, speed, real internet checks, change streams. if (UNetwork.isOffline) …
UNetworkAddress: A local IP address of this device.
UNetworkBuilder: Rebuilds whenever the network state changes.
UNetworkSource: Media from a URL.
UNetworkStatus: Network snapshot: types, metered, roaming, speed, captive portal… (see UNetwork).
Unicode: Constants for useful Unicode characters.
UniqueKey: A key that is only equal to itself.
UniqueWidget<T extends State<StatefulWidget>>: Base class for stateful widgets that have exactly one inflated instance in the tree.
UnmanagedRestorationScope: Inserts a provided RestorationBucket into the widget tree and makes it available to descendants via RestorationScope.of.
UNotification: Local notifications on all 6 platforms: show, schedule (Gregorian or Jalali repeats), buttons, replies, progress, badges, channels. Needs dart run u:app permission add notifications. UNotification.show(1, title: "Done")
UNotificationAction: A button on a notification.
UNotificationChannel: An Android notification channel (sound, vibration and importance are fixed per channel).
UNotificationCreateParams
UNotificationEvent: A tap, button press, reply or dismissal.
UNotificationInfo: A scheduled notification that has not fired yet, or one currently shown.
UNotificationPermission: Notification permission and what is allowed (alert, sound, badge…).
UNotificationProgress: Progress bar of a notification. UNotificationProgress(value: 40)
UNotificationReadParams
UNotificationRequest: Everything a notification can carry. Platforms ignore what they cannot show.
UNotificationResponse
UNotificationSelectorArgs
UNotificationService
UNotificationUpdateParams
UNotifyChannel: Engine behind UNotification; use UNotification instead.
UNumberInputFormatter: Keeps only digits (Persian digits converted), up to maxDigits. UTextField(formatters: [UNumberInputFormatter(maxDigits: 10)])
UNumberPagination: Page number buttons (1 2 3 … 10) with prev/next, for tables. UNumberPagination(currentPage: page, totalPages: 12, onPageChanged: (p) => load(p))
UNumericKeyboard: On-screen number pad for PIN, amount and POS screens (no system keyboard). UNumericKeyboard(onKeyTap: controller.appendCharacter, onBackspace: controller.dropLastCharacter, onBackspaceLongPress: controller.clear)
UNumericKeyboardAction: An extra button on the numeric keyboard (e.g. "Pay").
UObx: Rebuilds automatically when any URx read inside builder changes. UObx(() => Text(name.value))
UOfflineBanner: Shows a slim "No internet" bar above child while offline. UOfflineBanner(child: HomePage())
UOhlcChart: OHLC bar chart for prices. UOhlcChart(candles: candles)
UOnlineBuilder: Rebuilds with the online/offline state. UOnlineBuilder(builder: (context, online) => online ? Feed() : OfflinePage())
UOperator: Iranian mobile operator (همراه اول، ایرانسل، رایتل…).
UOperatorDetail: What a mobile prefix says: operator, SIM type, province, model.
UOption
UOs: Update info of one platform: builds below min must update, below current may update.
UOsMetricsResponse
UOtp: Offline one-time codes tied to a POS serial and today's date (Verhoeff checksums), for terminals without internet. final code = UOtp.generateOtp(serial, 8);
UOtpField: One-time-code boxes with paste, SMS autofill, obscuring and error state. UOtpField(length: 6, onCompleted: verify)
UOverdueInvoiceItem
UPackage: Engine behind the app part of UApp; use UApp instead.
UPackageInfo: App facts (name, id, version, build, install time…) — see UApp.packageInfo.
UPaginatedList<T>: Infinite-scroll list: loads page 1, then the next page near the end, with pull-to-refresh. UPaginatedList<Post>(fetch: (page) => api.posts(page), itemBuilder: (c, p, i) => PostTile(p))
UPaginatedListState<T>: State of UPaginatedList; reach it with a GlobalKey to call refresh(). key.currentState?.refresh()
UParkingBillLineResponse
UParkingBillResponse
UParkingCreateParams
UParkingDashboardParams
UParkingDashboardResponse
UParkingEntryParams
UParkingExitCalculateParams
UParkingExitParams
UParkingInsideVehicleResponse
UParkingInsideVehiclesParams
UParkingPlateFlagCreateParams
UParkingPlateFlagReadParams
UParkingPlateFlagResponse
UParkingPlateFlagSelectorArgs
UParkingPlateFlagUpdateParams
UParkingPlateStatusParams
UParkingPlateStatusResponse
UParkingReadParams
UParkingReportCreateParams
UParkingReportReadParams
UParkingReportResponse
UParkingReportSelectorArgs
UParkingReportUpdateParams
UParkingResponse
UParkingSelectorArgs
UParkingService
UParkingShiftCloseParams
UParkingShiftOpenParams
UParkingShiftReadParams
UParkingShiftResponse
UParkingShiftSelectorArgs
UParkingStaffCreateParams
UParkingStaffReadParams
UParkingStaffResponse
UParkingStaffSelectorArgs
UParkingStaffUpdateParams
UParkingSubscriptionCreateParams
UParkingSubscriptionReadParams
UParkingSubscriptionResponse
UParkingSubscriptionSelectorArgs
UParkingSubscriptionUpdateParams
UParkingTariffCreateParams
UParkingTariffReadParams
UParkingTariffResponse
UParkingTariffSelectorArgs
UParkingTariffUpdateParams
UParkingUpdateParams
UParkingUserCreateParams
UParkingUserDeleteParams
UParkingUserReadParams
UPatternPoint: Internal: finder pattern point.
UPaymentRequest
UpdateSelectionIntent: An Intent that represents a user interaction that attempts to change the selection in an input field.
UPdf: PDF shortcuts: open a viewer, read text, read metadata; pure Dart, all platforms. UPdf.show(url: url)
UPdf417DecodedBitStream: Internal: PDF417 decoder.
UPdf417Row: Internal: PDF417 row.
UPdf417Scanner: Internal: PDF417 scanner.
UPdf417Symbols: Internal: PDF417 symbol table.
UPdfAes: Internal: AES for encrypted PDFs.
UPdfAnnotationInfo: An existing annotation: kind, page, rect, text, color.
UPdfAnnotationsPanel: List of every annotation; tap to jump to its page.
UPdfAnnotationSpec: A new annotation to add.
UPdfCcittDecoder: Internal: CCITT fax decoder (scanned PDFs).
UPdfCff: Internal: CFF font.
UPdfCidRange: Internal: CMap range.
UPdfCMap: Internal: character map.
UPdfCodecs: Internal: PDF stream filters.
UPdfCodePoint: Internal: decoded character code.
UPdfCodespace: Internal: CMap codespace.
UPdfColorSpace: Internal: color space.
UPdfComposer: Builds new PDF pages (text, images, shapes).
UPdfController: Controls a PDF viewer: open, pages, zoom, search, selection, outline.
UPdfDecodedStream: Internal: decoded stream bytes.
UPdfDict: Internal: PDF dictionary.
UPdfDigest: Internal: MD5/SHA for PDF encryption.
UPdfDocument: An opened PDF: pages, outline, metadata.
UPdfDocumentToolsPanel: Whole-document tools: watermark, page numbers, metadata, merge, export, optimize.
UPdfEdit: An editable PDF (annotations, pages, forms, save).
UPdfEditController: Edits a PDF: markups, ink, notes, text boxes, page rotate/delete/move/insert, redaction, watermark, merge, save.
UPdfEditorPage: Full PDF editor screen (tools, pages, forms, save). UPdfEditorPage(filePath: path, onSaved: (p) => print(p))
UPdfEncryption: Internal: PDF decryption.
UPdfExponentialFunction: Internal: exponential function.
UPdfExport: Exports pages to a new PDF or images.
UPdfFallbackText: Internal: text for pages without a text layer.
UPdfFont: Internal: a PDF font.
UPdfFormField: A form field: name, kind, value, options.
UPdfFormPanel: Fills PDF form fields.
UPdfFunction: Internal: PDF function.
UPdfFunctionArray: Internal: function array.
UPdfGlyphSource: Internal: font glyph provider.
UPdfImages: Internal: image decoders.
UPdfIndex: Internal: CFF index.
UPdfInflater: Internal: zlib decoder.
UPdfName: Internal: PDF name object.
UPdfOps: Internal: page content operators.
UPdfOutlinePanel: Table of contents panel of a PDF.
UPdfPage: A PDF page (size, rotation, resources).
UPdfPageManager: Page organizer (rotate, delete, reorder, insert).
UPdfPageManagerPanel: Page thumbnails with rotate/delete/move actions.
UPdfPageRenderer: Renders PDF pages to images (pure Dart). await UPdfPageRenderer(doc).render(0)
UPdfPageView: One rendered PDF page with highlights and selection (a building block of UPdfViewer).
UPdfPositionedGlyph: A glyph as positioned on the page, before being grouped into text runs.
UPdfPostScriptFunction: Internal: PostScript calculator function.
UPdfRaster: Internal: rasterises pages for redaction.
UPdfRc4: Internal: RC4 for old encrypted PDFs.
UPdfRedactor: Internal: removes redacted content.
UPdfRef: Internal: PDF object reference.
UPdfRenderOptions: Render options: scale, color mode, annotations, background.
UPdfRenderResult: A rendered page image.
UPdfSampledFunction: Internal: sampled function.
UPdfSerializer: Internal: writes PDF objects.
UPdfSettingsPanel: View settings (scroll mode, spread, color mode, fit).
UPdfShadingPaint: Internal: gradient shading.
UPdfStandardNames: Internal: standard glyph names.
UPdfStitchingFunction: Internal: stitching function.
UPdfStream: Internal: PDF stream.
UPdfString: Internal: PDF string.
UPdfSyntax: Internal: PDF lexer/parser.
UPdfTextLayout: Turns positioned glyphs into logically ordered text runs with one rectangle per character, so selections and highlights on RTL (Persian/Arabic) pages land exactly on the glyphs that were selected.
UPdfThumbnail: Thumbnail image of one page.
UPdfThumbnailPanel: Grid of page thumbnails.
UPdfTrueType: Internal: TrueType font.
UPdfType1: Internal: Type 1 font.
UPdfViewer: Full PDF reader in pure Dart (all platforms): search, select/copy, outline, thumbnails, night mode, highlights, notes, drawing, save. UPdfViewer(url: "https://x.com/a.pdf")
UPdfViewerState: State of UPdfViewer; use a GlobalKey to control it (pages, zoom, annotations).
UPdfXref: Internal: cross-reference table.
UPdfXrefEntry: Internal: cross-reference entry.
UPersianTools: Iranian helpers: national code, card/Sheba checks and bank names, number ⇄ Persian words, mobile operator lookup. UPersianTools.validateNationalCode("0012345678")
UPerspectiveTransform: Internal: maps a tilted code onto a flat grid.
UPhoneInputFormatter: Formats a phone number as you type for countryCode. UTextField(formatters: [UPhoneInputFormatter(countryCode: "IR")])
UPhoneNumberData: What UTextFieldPhoneNumber reports: full number, number without code and the country's details.
UPhoneNumberUtils: International phone numbers: clean input, validate per country, format, convert to E.164 (+989121234567). UPhoneNumberUtils.toE164("0912 123 4567", countryCode: "IR")
UPieChart: Pie chart. UPieChart(slices: [USlice(label: "A", value: 3), USlice(label: "B", value: 1)])
UPill: Small tinted label with optional icon (statuses, tags). UPill("Paid", color: Colors.green, icon: Icons.check)
UPlaceFaq
UPlacemark: An address: street, city, postal code, country… with coordinates.
UPlaceNearby
UPlateField: Iranian car plate input (2 digits, letter, 3 digits, Iran code). UPlateField(onPlateChange: (p) => plate = p)
UPlaylist: A saved playlist.
UPlaylistEntry: One M3U/PLS/XSPF entry.
UPlaylistParser: Parses and writes playlists.
UPlaylistStore: Saved playlists (see UMedia).
UPnService
UPointSeries: A named group of points for scatter/bubble charts. UPointSeries(name: "A", points: [UChartPoint(x: 1, y: 2)])
UPopupMenu: ⋮ button that opens a menu of UPopupMenuItem. UPopupMenu(items: [UPopupMenuItem(label: "Delete", icon: Icons.delete, onTap: delete, destructive: true)])
UPopupMenuItem: One item of UPopupMenu: label, icon, action, destructive style.
UPosition: A GPS fix: latitude, longitude, accuracy, altitude, speed, heading, time. p.latitude
UPredefinedValidationPatterns
UPressable: Makes any widget shrink a bit while pressed, then calls onTap. UPressable(onTap: open, child: card)
UProcess
UProcessController: Loads, fills and sends the steps of a server-driven process (KYC, onboarding).
UProcessESignField: Signature field of a process step.
UProcessField
UProcessFields: Renders the body of a single process step: an optional message / message-box followed by the step's fields, each mapped to its matching input widget.
UProcessGetParams
UProcessImagePickerField: Camera image field for a process step. Captures a photo, stores it as base64 on the matching processStepSend field, and shows any admin rejection note.
UProcessItem
UProcessService
UProcessStepGet
UProcessStepSend
UProcessStepsIndicator: Horizontal stepper showing each step's verification status.
UProcessStepStatus
UProcessStyle: Colors of the process screens (verified, awaiting, current); null values follow the theme. UProcessStyle(verifiedColor: Colors.green)
UProcessTextField: Text/number/date field of a process step.
UProcessView: Full-screen, self-contained multi-step process flow. Fully generic: give it a processId and it works with no wrapper. onCompleted is optional — when omitted the screen simply closes on completion; pass it only when a specific process needs custom post-completion routing. Optionally pass a style to match the host app's brand.
UProcessVisualAuthField: Video selfie (visual authentication) field of a process step. Needs permission add camera microphone.
UProductCreateParams
UProductJson
UProductReadParams
UProductResponse
UProductSelectorArgs
UProductService
UProductUpdateParams
UProgressCircular: A fully customizable circular progress ring.
UProgressLinear: Progress bar (determinate 0-100 or indeterminate) with label, rounded ends, vertical option. UProgressLinear(value: 40)
UProgressRingGauge: Circular progress ring with a centered value (KPIs). UProgressRingGauge(value: 80, label: "Done")
UPropertyBreakdownItem
UPropertyDashboardResponse
UProvince: A province/state with its cities.
UPwa: Web only: install state and the iOS "Add to Home Screen" guide; every getter is false off the web. if (UPwa.canPromptIosInstall) UPwa.promptIosInstall()
UQrAlignmentPatternFinder: Finds the alignment pattern near the bottom-right of larger QR symbols.
UQrBitMatrixParser: Internal: reads QR codewords.
UQrDataBlock: Internal: QR data block.
UQrDataMask: Internal: QR data masks.
UQrDecodedBitStream: Internal: QR bit-stream decoder.
UQrDecodeResult: Internal: decoded QR content.
UQrDetector: Internal: finds QR codes in an image.
UQrDetectorResult: Internal: located QR.
UQrEcb: Internal: QR error-correction block.
UQrEcBlocks: Internal: QR error-correction blocks.
UQrFinderInfo: Internal: QR finder patterns.
UQrFinderPatternFinder: Locates the three 1:1:3:1:1 finder patterns of a QR symbol.
UQrFormatInformation: Internal: QR format bits.
UQrMatrixDecoder: Decodes an already-sampled QR bit matrix, retrying mirrored.
UQrVersion: Internal: QR version table.
URadarChart: Radar/spider chart comparing series across axes. URadarChart(axes: ["Speed", "Power", "Range"], series: [UChartSeries(values: [3, 4, 2])])
URadialGauge: Classic 270° gauge with needle, ticks and zones. URadialGauge(value: 72, bands: [UGaugeBand(start: 80, end: 100, color: Colors.red)])
URatingBar: Tappable/draggable star (or any icon) rating with half steps. URatingBar.builder(itemBuilder: (c, i) => const Icon(Icons.star, color: Colors.amber), onRatingUpdate: (r) => rating = r)
URatingBarIndicator: Read-only rating display with exact fractions (e.g. 4.3). URatingBarIndicator(rating: 4.3, itemBuilder: (c, i) => const Icon(Icons.star, color: Colors.amber))
URatingWidget: Full / half / empty widgets used by URatingBar.
UReadMoreText: Long text that shows "Read more / Show less" and supports links. UReadMoreText(longText, trimLines: 3)
UReadMoreTextState: State of UReadMoreText.
UReceipt
UReceiptKeyValues
UReceiptRow
UReceiptSheet
UReceivedShare: What another app shared into this one.
URecentContractItem
URecentMerchantItem
URecentTxnItem
URecentUserItem
UReedSolomon: Berlekamp-Massey / Chien search decoder shared by QR, Data Matrix and Aztec.
URefreshTokenParams
URegisterParams
UReservationGuestJson
UReservationGuestParams
UReserveChargeParams
UResponse<T>
UResponsive: Shows a different widget on phone (<850), tablet (850-1100) and desktop (1100+) widths. UResponsive(mobile: const ListLayout(), desktop: const GridLayout())
URetry: Retries a failing async job with growing waits (1s, 2s, 4s…). await URetry.run(() => api.load(), attempts: 3)
URichTextController: A TextEditingController that keeps a list of UStyleSpans in sync with text edits and renders them via buildTextSpan. It survives insertions/deletions by shifting spans and exposes helpers to toggle/apply formatting on the current selection.
URichTextEditor: Embeddable block-based rich text editor.
URichTextEditorField: Tap-to-edit field that opens the full rich text editor and returns HTML. URichTextEditorField(content: html, onSubmit: (h) => html = h)
UrlChange: Details of the change to a web view's url.
URow: Row with gap spacing, box decoration, tap and flex options. URow(spacing: 8, children: [icon, text])
URx<T>: A value that rebuilds UObx widgets when it changes (tiny GetX-style state). final URxInt count = 0.obs; UObx(() => Text("${count.value}"))
URxBool: Observable bool with toggle(). final URxBool loading = false.obs;
URxDouble: Observable double.
URxInt: Observable int. final URxInt n = 0.obs;
URxList<E>: Observable List; add/remove/sort rebuild UObx. final URxList<String> items = <String>[].obs; items.add("x");
URxMap<K, V>: Observable Map; changes rebuild UObx. final URxMap<String, int> cart = <String, int>{}.obs;
URxn<T>: Observable nullable value. final URxn<User> user = URxn<User>();
URxnBool: Observable bool?.
URxnDouble: Observable double?.
URxnInt: Observable int?.
URxnNum: Observable num?.
URxnString: Observable String?.
URxNum: Observable num.
URxSet<E>: Observable Set; changes rebuild UObx.
URxState: Observable UPageState for a page's loading/error/empty UI. final URxState state = URxState(); state.loading(); await load(); state.loaded();
URxString: Observable String. final URxString name = "".obs;
UScaffold: Scaffold that also closes the keyboard on outside taps, adds SafeArea and pads/decorates the body. UScaffold(appBar: AppBar(title: const Text("Home")), body: content)
UScanner: Live QR/barcode scanner widget with scan window, torch, zoom, gallery and hint; all 6 platforms. Needs dart run u:app permission add camera. UScanner(onScan: (text) => print(text))
UScannerPage: A ready-to-use full-screen scanner page wrapping UScanner.
UScatterChart: Scatter chart of free (x, y) points. UScatterChart(data: [UPointSeries(points: pts)])
UScreenGuard: Hides the app from screenshots and screen recordings (banking, OTP, paid videos). Android, iOS, macOS, Windows; Linux/web do nothing. UScreenGuard.enable()
UScreenGuardChannel: Native side of UScreenGuard ("u/screen_guard"): blocks screenshots / recording and reports them.
UScrollingText: Marquee: text scrolls sideways (or up) when it is too long. UScrollingText(text: "Breaking news: …")
UScrollingTextState: State of UScrollingText.
USearchField: Search box that waits until typing stops before calling onSearch, with a clear button. USearchField(onSearch: (q) => controller.search(q))
USecureArea: Blocks screenshots / screen recording while mounted (reference counted, so nested readers and players don't switch protection off for each other).
USegmentedControl<T extends Object>: iOS-style segmented switch between a few options. USegmentedControl<int>(items: const {0: "Day", 1: "Week"}, selectedValue: tab, onValueChanged: (v) => tab = v)
USegmentedGauge: Arc of blocks that light up to the value. USegmentedGauge(value: 70, segments: 12)
USegmentProgressBar: IDM's signature bar: one lane per connection, drawn at its byte offset.
USelectionCard: Selectable card (plans, options) with pills and a check mark. USelectionCard(title: "Gold", subtitle: "12 months", isSelected: plan == 1, onTap: () => plan = 1)
USelectOption
USemiCircleGauge: 180° half-circle gauge. USemiCircleGauge(value: 40)
USendAgainCountDown: "Resend code in 01:59" countdown that turns into a button. USendAgainCountDown(counter: 120, onSendAgainTap: resend, buttonTitle: "Resend", counterDescription: "until resend")
UserAccountsDrawerHeader: A Material Design Drawer header that identifies the app's user.
UserFlowField
UserFlowFileRequirement
UserFlowStatus
UserFlowStep
UserScrollNotification: A notification that the user has changed the ScrollDirection in which they are scrolling, or have stopped scrolling.
UServices
USettingsAvreen
USettingsBasic
USettingsChargeAmount
USettingsChargeInternet
USettingsCors
USettingsCosts
USettingsGold
USettingsInquiryCacheDurations
USettingsIpg
USettingsItHub
USettingsJwt
USettingsMiddleware
USettingsMobtakeran
USettingsNamat
USettingsSms
UShare: Shares text, links and files through the system sheet or straight to one app, and receives shares into the app. All 6 platforms. UShare.text("Hello")
UShareChannel: Engine behind UShare; use UShare instead.
UShareFile: A file to share: a path on disk, or bytes with a name.
UShareResult: Result of a share: status and the chosen app (Android/iOS/macOS).
USideMenu: Admin-style side menu: expands, collapses to a rail, becomes a drawer on phones; groups, badges, search, pinning, profile. USideMenu(controller: menu, items: [UMenuItem(id: "home", title: "Home", icon: Icons.home)])
USideMenuController: Controls a USideMenu: selection, expanded/rail/drawer mode, search, pinned items, open/close. final USideMenuController menu = USideMenuController(selectedId: "home");
USideMenuTheme: Colors, sizes and animation of USideMenu; USideMenuTheme.from(context) follows the app theme.
USignatureController: Controls and holds the state of a USignaturePadRaw. Strokes get a velocity-variable width for a natural pen feel, and can be undone, redone, cleared and exported to a PNG.
USignaturePad: A fully featured, pure-Dart signature pad: velocity-variable strokes, undo / redo / clear, an optional colour picker and width slider, and PNG export. Fires onSave with the captured PNG whenever a stroke completes.
USignaturePadRaw: The bare drawing surface: captures pointer input and paints the strokes.
USignaturePoint: One point of a signature stroke with its pen width.
USignatureStroke: One continuous stroke of a signature.
USimCardCreateParams
USimCardReadParams
USimCardResponse
USimCardSelectorArgs
USimCardUpdateParams
USimService
USkeleton: Shimmering grey placeholder shown while content loads. USkeleton(width: 120, height: 16), USkeleton.circle(48)
USlice: One slice of a pie, donut, funnel or treemap. USlice(label: "Food", value: 40)
USlider: Auto-playing image slider (banners) with dots. USlider(images: banners.map((b) => UImage(b)).toList())
USliverGrid: Sliver grid for CustomScrollView.
USliverList: Sliver list for CustomScrollView.
USound: Fire-and-forget sound effects (clicks, dings) that mix with the user's music instead of pausing it. USound.play("assets/sounds/tap.mp3")
USparkline: Tiny inline trend line (no axes), e.g. in a table cell. USparkline(values: [3, 5, 4, 8])
USpeedometerGauge: 240° speedometer with zones and needle. USpeedometerGauge(value: speed, max: 200)
USplineChart: Smooth-curve line chart. USplineChart(series: series, categories: months)
UStack: Stack with box decoration, tap and flex options. UStack(children: [image, badge.position(top: 4, right: 4)])
UStacked100BarChart: 100% stacked bars showing each series' share per category.
UStackedAreaChart: Areas stacked on top of each other.
UStackedBarChart: Bars stacked on top of each other per category.
UState<T extends StatefulWidget>: Base State with theme and screen shortcuts; extend it instead of State. class _PageState extends UState<Page> { … scheme.primary … }
UStatTile: Compact metric tile — a caption over a large number, optionally with a unit or a secondary total.
UStepLineChart: Step line chart for values that jump (states, prices). UStepLineChart(series: series)
UStepNavigation
UStorage: Static entry point. Everything not store-specific delegates to the default store.
UStorageBackend: Internal: file system per platform (disk, or IndexedDB on web).
UStorageChange: A change in a store. value is null when the key was removed, expired or cleared.
UStorageEntry: A stored file: key, bucket, size, dates, tags.
UStorageEvent: A storage change.
UStorageManagerPage: "Storage" screen: usage per bucket and clear buttons (UFile.openStoragePage opens it).
UStorageSink: A handle that accepts writes at arbitrary offsets. Writes are serialised internally, so concurrent callers (download segments) never interleave inside one write.
UStore: One key/value store. Obtain with UStorage.instance, UStorage.secure or UStorage.open.
UStreamView<T>: Listens to a stream and shows loading / error / data. UStreamView<int>(stream: counter, builder: (context, v) => Text("$v"))
UStyleSpan: A single inline style span over the range [start, end) of a text block. value carries the payload for value-attributes: int (ARGB) for UInlineAttr.color and UInlineAttr.highlight, double for UInlineAttr.fontSize, and String for UInlineAttr.fontFamily (family name) and UInlineAttr.link (href). It is null for boolean attributes.
USubtitleCue: One subtitle line with start/end times.
USubtitleData: Parsed subtitles: cues and styles.
USubtitleParser: Parses SRT, VTT, ASS/SSA, LRC, MicroDVD.
USubtitleSpan: Styled text inside a cue.
USubtitleStyle: ASS/SSA style.
USubtitleStyleConfig: Subtitle look: size, color, outline, background, fonts (separate RTL font), padding, max lines.
USubtitleView: Draws the current subtitle cue of a controller.
USystemDownloadStatus: Status of a download handed to the OS (Android DownloadManager, Apple background URLSession, Windows BITS).
USystemMetricsResponse
UTab: One tab of UTabBar: id, title, icon, badge. UTab(id: "users", title: "Users", icon: Icons.people)
UTabBar: Browser-style closable, reorderable tabs for desktop/admin apps. UTabBar(tabs: tabs, selectedIndex: i, onSelect: (i) => setState(() => current = i), onClose: close)
UTabBarTheme: Colors and sizes of UTabBar; UTabBarTheme.from(context) follows the app theme.
UTabData: One tab of U.tabs: a title and its page.
UTableData: The cells of a UBlockType.table block. Cells hold plain text.
UTagChips<T extends UNumericIdentifiable>: On/off chips for one group of numeric tags (amenities, policies, type...). tags is the item's whole tag list and is edited in place; single keeps at most one of options selected.
UTagParser: Reads audio tags (ID3, Vorbis, MP4) in pure Dart.
UTerminalAssignParams
UTerminalAvailabilityResponse
UTerminalBrandCreateParams
UTerminalBrandReadParams
UTerminalBrandResponse
UTerminalBrandSelectorArgs
UTerminalBrandUpdateParams
UTerminalBrokerCreateParams
UTerminalBrokerJson
UTerminalBrokerReadParams
UTerminalBrokerResponse
UTerminalBrokerSelectorArgs
UTerminalBrokerUpdateParams
UTerminalBulkCreateParams
UTerminalCreateParams
UTerminalImportParams
UTerminalImportResponse
UTerminalReadParams
UTerminalRejectParams
UTerminalResponse
UTerminalSelectorArgs
UTerminalService
UTerminalSupportPasswordResponse
UTerminalUpdateParams
UTextBodyLarge: Text in bodyLarge style.
UTextBodyMedium: Text in bodyMedium style (normal text). UTextBodyMedium(description, maxLines: 2)
UTextBodySmall: Text in bodySmall style (secondary text).
UTextDecoder: Detects and decodes text encodings (UTF-8/16, Windows-1256…).
UTextDisplayLarge: Text in the theme's displayLarge style with color/weight/lines options. UTextDisplayLarge("Welcome")
UTextDisplayMedium: Text in displayMedium style. UTextDisplayMedium("1,250")
UTextDisplaySmall: Text in displaySmall style.
UTextField: Text field with label, validator, clear button, password eye, formatters and u's layout options. UTextField(labelText: "Email", validator: UValidators.email(), keyboardType: TextInputType.emailAddress)
UTextFieldAutoComplete<T>: Field that suggests from a local list as you type. UTextFieldAutoComplete<City>(items: cities, labelBuilder: (c) => c.name, selectedItem: city, onChanged: (c) => city = c)
UTextFieldAutoCompleteAsync<T>: Field that searches your API as you type (debounced). UTextFieldAutoCompleteAsync<User>(fetchData: api.searchUsers, labelBuilder: (u) => u.name, selectedItem: null, onChanged: (u) {})
UTextFieldAutoCompleteAsyncMulti<T>: Async search field that collects several picks as removable chips. UTextFieldAutoCompleteAsyncMulti<Tag>(selected: tags, fetchData: api.searchTags, labelBuilder: (t) => t.title)
UTextFieldConfig
UTextFieldDatePicker: Read-only field that opens a Gregorian or Jalali date (and time) picker on tap. UTextFieldDatePicker(jalali: true, labelText: "Birth date", onChange: (d) => birth = d)
UTextFieldPhoneNumber: Phone field with country picker, flag, per-country validation and formatting. UTextFieldPhoneNumber(onChanged: (p) => phone = p.phoneNumber)
UTextHeadlineLarge: Text in headlineLarge style.
UTextHeadlineMedium: Text in headlineMedium style.
UTextHeadlineSmall: Text in headlineSmall style.
UTextLabelLarge: Text in labelLarge style (buttons).
UTextLabelMedium: Text in labelMedium style.
UTextLabelSmall: Text in labelSmall style (captions).
UTextTitleLarge: Text in titleLarge style (page/card titles). UTextTitleLarge("Orders")
UTextTitleMedium: Text in titleMedium style.
UTextTitleSmall: Text in titleSmall style.
Utf8Codec: A Utf8Codec encodes strings to utf-8 code units (bytes) and decodes UTF-8 code units to strings.
Utf8Decoder: This class converts UTF-8 code units (lists of unsigned 8-bit integers) to a string.
Utf8Encoder: This class converts strings to their UTF-8 code units (a list of unsigned 8-bit integers).
UThermometerGauge: Thermometer with bulb, column and scale. UThermometerGauge(value: 37, min: 30, max: 45)
UThrottler: Runs at most once per interval, e.g. a button that must not fire twice. final UThrottler t = UThrottler(interval: 1.seconds); t.run(pay);
UTicketCreateParams
UTicketJson
UTicketReadParams
UTicketResponse
UTicketSelectorArgs
UTicketService
UTicketUpdateParams
UTimezone: Device time zone as an IANA id and UTC offset; UHttpClient sends it in the "Timezone" header. UTimezone.getLocalTimezone() → "Asia/Tehran"
UToast: Snackbars, toasts and banners from anywhere, no BuildContext needed (uses navigatorKey). UToast.success(message: "Saved")
UTopMerchantItem
UTopupChargeParams
UTrackRecord: An indexed audio file with its tags and play stats.
UTransportOptions: Internal: HTTP transport options.
UTreemapChart: Treemap: nested rectangles sized by value. UTreemapChart(slices: categories)
UTxnCreateParams
UTxnJson
UTxnReadParams
UTxnResponse
UTxnSelectorArgs
UTxnService
UTxnUpdateParams
UUpcEanPatterns: Internal: EAN/UPC patterns.
UUpcEanReader: Internal: EAN/UPC reader.
UUpcEReader: UPC-E: six digits between a start guard and a six-element end pattern.
UUpdateDialog: Shows "Update available / required" from your server data, comparing build numbers (Android, iOS, Windows, macOS). UUpdateDialog.checkAndShow(data, () => UNavigator.offAll(HomePage()))
UUpdateResponse: Your server's update info per platform (min and current build numbers, download links). UUpdateResponse.fromMap(json)
UUserBulkCreateParams
UUserCreateParams
UUserDataDownloadResponse
UUserJson
UUserReadParams
UUserResponse
UUserSelectorArgs
UUserService
UUserUpdateParams
UUUID: Makes UUIDs (RFC 9562) with no package; v4 random and v7 time-sorted are the usual picks. UUUID.uuidV4()
UValidationRules
UValidators: Ready-made form validators; each returns a FormFieldValidator for validator:. UTextField(validator: UValidators.email())
UVasSelectorArgs
UVaultHeader: Internal: header of an encrypted vault file.
UVaultKeys: Holds the unwrapped master key and hands out per-file ciphers.
UVaultWriter: Encrypting sink. Plaintext offsets in, sealed chunks out.
UVehicleCreateParams
UVehicleReadParams
UVehicleResponse
UVehicleSelectorArgs
UVehicleService
UVehicleUpdateParams
UVehicleViolationDetailItem
UVehicleViolationDetailParams
UVehicleViolationDetailResponse
UVerifyMobileForLoginParams
UVerticalLinearGauge: Vertical gauge (column style). UVerticalLinearGauge(value: 55)
UVideo: Complete video player for a UMediaController: gestures, controls, subtitles, markers, notes. UVideo(controller: UMedia.video()..open(UMedia.network(url)))
UVideoColorMatrix: Color matrices for video brightness/contrast/saturation/hue filters.
UVideoControls: Full control layer: play/pause, seek bar, speed, quality, subtitles, PiP, lock, fullscreen, queue, notes.
UVideoFilterLayer: Applies UVideoSettings color filters to a child.
UVideoFullscreen: Opens a controller full screen (landscape, hides system bars).
UVideoGestureConfig: Which player gestures are on: tap, double-tap seek, horizontal scrub, vertical volume/brightness, long-press 2×, pinch zoom, swipe-down close.
UVideoGestures: Gesture layer over a video (see UVideoGestureConfig).
UVideoMarker: A labelled range on the seek bar (chapter, intro to skip).
UVideoPlayer: Drop-in player from a URL/file/asset/base64 with every feature; all 6 platforms (Linux needs GStreamer). UVideoPlayer(url: "https://x.com/v.m3u8", resumeKey: "movie-1")
UVideoSeekBar: Seek bar with buffer, markers and scrub preview.
UVideoSettings: Per-player view settings: fit, zoom, rotation, mirror, color filters, subtitle style/delay, A-B repeat, sleep timer.
UVideoSettingsSheet: The player settings sheet (fit, filters, subtitles, A-B repeat, sleep timer).
UVideoSheet: Opens a player full-width inside a bottom sheet. Accepts the same sources as UVideoPlayer.
UVideoStatsOverlay: Technical stats over the video (resolution, bitrate, buffer, dropped frames).
UVideoView: The video surface of a UMediaController (fit, zoom, pan, rotation). UVideoView(controller: c)
UVideoWithNotes: Video with a side panel of time-stamped notes and drawing.
UVisibilityRule
UVisit: A visit (arrival / departure at a place), iOS only.
UVisualizer: Live audio visualizer of a player (real FFT on Android, animated estimate elsewhere). UVisualizer(controller: UAudio.controller)
UWalletChargeParams
UWalletJson
UWalletPurchaseParams
UWalletReadParams
UWalletResponse
UWalletSelectorArgs
UWalletService
UWalletTransferParams
UWalletTxnJson
UWalletTxnReadParams
UWalletTxnResponse
UWalletTxnSelectorArgs
UWaterfallChart: Waterfall chart of gains/losses with totals. UWaterfallChart(items: steps)
UWaterfallItem: One step of a waterfall chart; isTotal draws a running-total bar. UWaterfallItem(label: "Tax", value: -120)
UWebBuild: Fingerprint of a Flutter web build (the one a tab runs or the one the server has).
UWebMessage: Web only: listens to window.postMessage (IPG checkout pages, OAuth popups, parent iframes). Does nothing elsewhere.
UWebUpdate: Web only: keeps every open tab on the latest deployed build (clears stale caches/service workers); initU() already starts it. Build with --dart-define=U_BUILD_ID=<version> for exact checks. UWebUpdate.checkAndRefresh()
UWebView: In-app browser widget with top bar, progress, desktop mode, zoom, share and JavaScript channels; all 6 platforms (web: iframe, some sites refuse it). UWebView(initialUrl: "https://sinamn75.com")
UWebViewState: State of UWebView; use a GlobalKey to navigate from code.
UWhiteRectangleDetector: Finds a white-bordered rectangle containing a symbol, used as the starting point for the Data Matrix and PDF417 detectors.
UWidgetToImage: Wraps a widget so it can be saved/shared as an image (receipts, cards). UWidgetToImage(controller: c, child: receipt)
UWidgetToImageController: Captures a UWidgetToImage as PNG bytes.
UWrap: Wrap (flows children onto new lines) with decoration and tap options. UWrap(spacing: 8, runSpacing: 8, children: chips)
UXml: Internal: tiny XML parser.
UXmlNode: Internal: XML node.
UZipCodeToAddressDetailParams
UZipCodeToAddressDetailResponse
ValueDelegate<T>
ValueKey<T>: A key that uses a value of a particular type to identify itself.
ValueListenable<T>: An interface for subclasses of Listenable that expose a value.
ValueListenableBuilder<T>: A widget whose content stays synced with a ValueListenable.
ValueNotifier<T>: A ChangeNotifier that holds a single value.
ValuePackager: Encodes and decodes the value half of a TLV, once the tag has decided which representation it uses.
ValueResult<T>: A result representing a returned value.
VasKeyTags: E2 — value added services, with E2.E0 items.
VectorGraphicUtilities: Utility functionality for interaction with vector graphic assets.
Velocity: A velocity in two dimensions.
VelocityEstimate: A two dimensional velocity estimate.
VelocityTracker: Computes a pointer's velocity based on data from PointerMoveEvents.
VerticalCaretMovementRun: The consecutive sequence of TextPositions that the caret should move to when the user navigates the paragraph using the upward arrow key or the downward arrow key.
VerticalDivider: A thin vertical line, with padding on either side.
VerticalDragGestureRecognizer: Recognizes movement in the vertical direction.
VerticalMultiDragGestureRecognizer: Recognizes movement in the vertical direction on a per-pointer basis.
View: Bootstraps a render tree that is rendered into the provided FlutterView.
ViewAnchor: Decorates a child widget with a side View.
ViewCollection: A collection of sibling Views.
ViewConfiguration: The layout constraints for the root render object.
Viewport: A widget through which a portion of larger content can be viewed, typically in combination with a Scrollable.
ViewportOffset: Which part of the content inside the viewport should be visible.
Vincenty
Visibility: Whether to show or hide a child.
VisualDensity: Defines the visual density of user interface components.
VoidCallbackAction: An Action that invokes the VoidCallback given to it in the VoidCallbackIntent passed to it when invoked.
VoidCallbackIntent: An Intent that keeps a VoidCallback to be invoked by a VoidCallbackAction when it receives this intent.
WeakMap<K, V>: Does not hold keys from garbage collection.
WebOptions: The options for the web file picker.
WebResourceError: Error returned in WebView.onWebResourceError when a web resource loading error has occurred.
WebResourceRequest: Defines the parameters of the web resource request from the associated request.
WebResourceResponse: Contains information about the response for a request.
WebSocket: A two-way HTTP communication object for client or server applications.
WebSocketStatus: WebSocket status codes used when closing a WebSocket connection.
WebSocketTransformer: The WebSocketTransformer provides the ability to upgrade a HttpRequest to a WebSocket connection. It supports both upgrading a single HttpRequest and upgrading a stream of HttpRequests.
WebViewController: Controls a WebView provided by the host platform.
WebViewCookie: A cookie that can be set globally for all web views using WebViewCookieManagerPlatform.
WebViewCookieManager: Manages cookies pertaining to all WebViews.
WebViewCredential: Defines the response parameters of a pending HttpAuthRequest received by the webview.
WebViewDataClearingResult: The result of clearing website data from a WebView data store.
WebViewDataManager: Manages website data shared by WebViews in the current platform data store.
WebViewPermissionRequest: Permissions request when web content requests access to protected resources.
WebViewPermissionResourceType: Types of resources that can require permissions.
WebViewPlatform: Interface for a platform implementation of a WebView.
WebViewUserScript: A script registered for injection into future documents.
WebViewWidget: Displays a native WebView as a Widget.
Widget: Describes the configuration for an Element.
WidgetInspector: A widget that enables inspecting the child widget's structure.
WidgetOrderTraversalPolicy: A FocusTraversalPolicy that traverses the focus order in widget hierarchy order.
WidgetsApp: A convenience widget that wraps a number of widgets that are commonly required for an application.
WidgetsBindingObserver: Interface for classes that register with the Widgets layer binding.
WidgetsFlutterBinding: A concrete binding for applications based on the Widgets framework.
WidgetsLocalizationAf: The translations for Afrikaans (af).
WidgetsLocalizationAm: The translations for Amharic (am).
WidgetsLocalizationAr: The translations for Arabic (ar).
WidgetsLocalizationAs: The translations for Assamese (as).
WidgetsLocalizationAz: The translations for Azerbaijani (az).
WidgetsLocalizationBe: The translations for Belarusian (be).
WidgetsLocalizationBg: The translations for Bulgarian (bg).
WidgetsLocalizationBn: The translations for Bengali Bangla (bn).
WidgetsLocalizationBo: The translations for Tibetan (bo).
WidgetsLocalizationBs: The translations for Bosnian (bs).
WidgetsLocalizationCa: The translations for Catalan Valencian (ca).
WidgetsLocalizationCs: The translations for Czech (cs).
WidgetsLocalizationCy: The translations for Welsh (cy).
WidgetsLocalizationDa: The translations for Danish (da).
WidgetsLocalizationDe: The translations for German (de).
WidgetsLocalizationDeCh: The translations for German, as used in Switzerland (de_CH).
WidgetsLocalizationEl: The translations for Modern Greek (el).
WidgetsLocalizationEn: The translations for English (en).
WidgetsLocalizationEnAu: The translations for English, as used in Australia (en_AU).
WidgetsLocalizationEnCa: The translations for English, as used in Canada (en_CA).
WidgetsLocalizationEnGb: The translations for English, as used in the United Kingdom (en_GB).
WidgetsLocalizationEnIe: The translations for English, as used in Ireland (en_IE).
WidgetsLocalizationEnIn: The translations for English, as used in India (en_IN).
WidgetsLocalizationEnNz: The translations for English, as used in New Zealand (en_NZ).
WidgetsLocalizationEnSg: The translations for English, as used in Singapore (en_SG).
WidgetsLocalizationEnZa: The translations for English, as used in South Africa (en_ZA).
WidgetsLocalizationEs: The translations for Spanish Castilian (es).
WidgetsLocalizationEs419: The translations for Spanish Castilian, as used in Latin America and the Caribbean (es_419).
WidgetsLocalizationEsAr: The translations for Spanish Castilian, as used in Argentina (es_AR).
WidgetsLocalizationEsBo: The translations for Spanish Castilian, as used in Bolivia (es_BO).
WidgetsLocalizationEsCl: The translations for Spanish Castilian, as used in Chile (es_CL).
WidgetsLocalizationEsCo: The translations for Spanish Castilian, as used in Colombia (es_CO).
WidgetsLocalizationEsCr: The translations for Spanish Castilian, as used in Costa Rica (es_CR).
WidgetsLocalizationEsDo: The translations for Spanish Castilian, as used in the Dominican Republic (es_DO).
WidgetsLocalizationEsEc: The translations for Spanish Castilian, as used in Ecuador (es_EC).
WidgetsLocalizationEsGt: The translations for Spanish Castilian, as used in Guatemala (es_GT).
WidgetsLocalizationEsHn: The translations for Spanish Castilian, as used in Honduras (es_HN).
WidgetsLocalizationEsMx: The translations for Spanish Castilian, as used in Mexico (es_MX).
WidgetsLocalizationEsNi: The translations for Spanish Castilian, as used in Nicaragua (es_NI).
WidgetsLocalizationEsPa: The translations for Spanish Castilian, as used in Panama (es_PA).
WidgetsLocalizationEsPe: The translations for Spanish Castilian, as used in Peru (es_PE).
WidgetsLocalizationEsPr: The translations for Spanish Castilian, as used in Puerto Rico (es_PR).
WidgetsLocalizationEsPy: The translations for Spanish Castilian, as used in Paraguay (es_PY).
WidgetsLocalizationEsSv: The translations for Spanish Castilian, as used in El Salvador (es_SV).
WidgetsLocalizationEsUs: The translations for Spanish Castilian, as used in the United States (es_US).
WidgetsLocalizationEsUy: The translations for Spanish Castilian, as used in Uruguay (es_UY).
WidgetsLocalizationEsVe: The translations for Spanish Castilian, as used in Venezuela (es_VE).
WidgetsLocalizationEt: The translations for Estonian (et).
WidgetsLocalizationEu: The translations for Basque (eu).
WidgetsLocalizationFa: The translations for Persian (fa).
WidgetsLocalizationFi: The translations for Finnish (fi).
WidgetsLocalizationFil: The translations for Filipino Pilipino (fil).
WidgetsLocalizationFr: The translations for French (fr).
WidgetsLocalizationFrCa: The translations for French, as used in Canada (fr_CA).
WidgetsLocalizationGa: The translations for Irish (ga).
WidgetsLocalizationGl: The translations for Galician (gl).
WidgetsLocalizationGsw: The translations for Swiss German Alemannic Alsatian (gsw).
WidgetsLocalizationGu: The translations for Gujarati (gu).
WidgetsLocalizationHe: The translations for Hebrew (he).
WidgetsLocalizationHi: The translations for Hindi (hi).
WidgetsLocalizationHr: The translations for Croatian (hr).
WidgetsLocalizationHu: The translations for Hungarian (hu).
WidgetsLocalizationHy: The translations for Armenian (hy).
WidgetsLocalizationId: The translations for Indonesian (id).
WidgetsLocalizationIs: The translations for Icelandic (is).
WidgetsLocalizationIt: The translations for Italian (it).
WidgetsLocalizationJa: The translations for Japanese (ja).
WidgetsLocalizationKa: The translations for Georgian (ka).
WidgetsLocalizationKk: The translations for Kazakh (kk).
WidgetsLocalizationKm: The translations for Khmer Central Khmer (km).
WidgetsLocalizationKn: The translations for Kannada (kn).
WidgetsLocalizationKo: The translations for Korean (ko).
WidgetsLocalizationKy: The translations for Kirghiz Kyrgyz (ky).
WidgetsLocalizationLo: The translations for Lao (lo).
WidgetsLocalizationLt: The translations for Lithuanian (lt).
WidgetsLocalizationLv: The translations for Latvian (lv).
WidgetsLocalizationMk: The translations for Macedonian (mk).
WidgetsLocalizationMl: The translations for Malayalam (ml).
WidgetsLocalizationMn: The translations for Mongolian (mn).
WidgetsLocalizationMr: The translations for Marathi (mr).
WidgetsLocalizationMs: The translations for Malay (ms).
WidgetsLocalizationMy: The translations for Burmese (my).
WidgetsLocalizationNb: The translations for Norwegian Bokmål (nb).
WidgetsLocalizationNe: The translations for Nepali (ne).
WidgetsLocalizationNl: The translations for Dutch Flemish (nl).
WidgetsLocalizationNo: The translations for Norwegian (no).
WidgetsLocalizationOr: The translations for Oriya (or).
WidgetsLocalizationPa: The translations for Panjabi Punjabi (pa).
WidgetsLocalizationPl: The translations for Polish (pl).
WidgetsLocalizationPs: The translations for Pushto Pashto (ps).
WidgetsLocalizationPt: The translations for Portuguese (pt).
WidgetsLocalizationPtPt: The translations for Portuguese, as used in Portugal (pt_PT).
WidgetsLocalizationRo: The translations for Romanian Moldavian Moldovan (ro).
WidgetsLocalizationRu: The translations for Russian (ru).
WidgetsLocalizations: Interface for localized resource values for the lowest levels of the Flutter framework.
WidgetsLocalizationSi: The translations for Sinhala Sinhalese (si).
WidgetsLocalizationSk: The translations for Slovak (sk).
WidgetsLocalizationSl: The translations for Slovenian (sl).
WidgetsLocalizationSq: The translations for Albanian (sq).
WidgetsLocalizationSr: The translations for Serbian (sr).
WidgetsLocalizationSrCyrl: The translations for Serbian, using the Cyrillic script (sr_Cyrl).
WidgetsLocalizationSrLatn: The translations for Serbian, using the Latin script (sr_Latn).
WidgetsLocalizationSv: The translations for Swedish (sv).
WidgetsLocalizationSw: The translations for Swahili (sw).
WidgetsLocalizationTa: The translations for Tamil (ta).
WidgetsLocalizationTe: The translations for Telugu (te).
WidgetsLocalizationTh: The translations for Thai (th).
WidgetsLocalizationTl: The translations for Tagalog (tl).
WidgetsLocalizationTr: The translations for Turkish (tr).
WidgetsLocalizationUg: The translations for Uighur Uyghur (ug).
WidgetsLocalizationUk: The translations for Ukrainian (uk).
WidgetsLocalizationUr: The translations for Urdu (ur).
WidgetsLocalizationUz: The translations for Uzbek (uz).
WidgetsLocalizationVi: The translations for Vietnamese (vi).
WidgetsLocalizationZh: The translations for Chinese (zh).
WidgetsLocalizationZhHans: The translations for Chinese, using the Han script (zh_Hans).
WidgetsLocalizationZhHant: The translations for Chinese, using the Han script (zh_Hant).
WidgetsLocalizationZhHantHk: The translations for Chinese, as used in Hong Kong, using the Han script (zh_Hant_HK).
WidgetsLocalizationZhHantTw: The translations for Chinese, as used in Taiwan, using the Han script (zh_Hant_TW).
WidgetsLocalizationZu: The translations for Zulu (zu).
WidgetSpan: An immutable widget that is embedded inline within text.
WidgetStateBorderSide: Defines a BorderSide whose value depends on a set of WidgetStates which represent the interactive state of a component.
WidgetStateColor: Defines a Color that is also a WidgetStateProperty.
WidgetStateInputBorder: Defines an InputBorder that is also a WidgetStateProperty.
WidgetStateMapper<T>: Uses a WidgetStateMap to resolve to a single value of type T based on the current set of Widget states.
WidgetStateMouseCursor: Defines a MouseCursor whose value depends on a set of WidgetStates which represent the interactive state of a component.
WidgetStateOutlinedBorder: Defines an OutlinedBorder whose value depends on a set of WidgetStates which represent the interactive state of a component.
WidgetStateProperty<T>: Interface for classes that resolve to a value of type T based on a widget's interactive "state", which is defined as a set of WidgetStates.
WidgetStatePropertyAll<T>: Convenience class for creating a WidgetStateProperty that resolves to the given value for all states.
WidgetStatesController: Manages a set of WidgetStates and notifies listeners of changes.
WidgetStateTextStyle: Defines a TextStyle that is also a WidgetStateProperty.
WidgetToRenderBoxAdapter: An adapter for placing a specific RenderBox in the widget tree.
WillPopScope: Registers a callback to veto attempts by the user to dismiss the enclosing ModalRoute.
WindowsOptions: The options for the Windows file picker.
WMSTileLayerOptions: Options for the []
WordBoundary: A TextBoundary subclass for locating word breaks.
Wrap: A widget that displays its children in multiple horizontal or vertical runs.
WrapParentData: Parent data for use with RenderWrap.
WriteBuffer: Write-only buffer for incrementally building a ByteData instance.
WritePipe: The "write" end of an Pipe created by Pipe.create.
X509Certificate: X509Certificate represents an SSL certificate, with accessors to get the fields of the certificate.
YearPicker: A scrollable grid of years to allow picking a year.
ZLibCodec: The ZLibCodec encodes raw bytes to ZLib compressed bytes and decodes ZLib compressed bytes to raw bytes.
ZLibDecoder: The ZLibDecoder is used by ZLibCodec and GZipCodec to decompress data.
ZLibEncoder: The ZLibEncoder encoder is used by ZLibCodec and GZipCodec to compress data.
ZLibOption: Exposes ZLib options for input parameters.
Zone: A zone represents an environment that remains stable across asynchronous calls.
ZoneDelegate: An adapted view of the parent zone.
ZoneSpecification: A parameter object with custom zone function handlers for Zone.fork.
ZoomPageTransitionsBuilder: Used by PageTransitionsTheme to define a zooming MaterialPageRoute page transition animation that looks like the default page transition used on Android Q.

Enums

AccessibilityFocusBlockType: Controls how accessibility focus is blocked.
AndroidOverscrollIndicator: Types of overscroll indicators supported by TargetPlatform.android.
AnimationBehavior: Configures how an AnimationController behaves when animations are disabled.
AnimationStatus: The status of an animation.
AppLifecycleState: States that an application can be in once it is running.
Assertiveness: Determines the assertiveness level of the accessibility announcement.
AttributionAlignment: Position to anchor RichAttributionWidget to relative to the FlutterMap
AutofillContextAction: Predefined autofill context clean up actions.
AutovalidateMode: Used to configure the auto validation of FormField and Form widgets.
Axis: The two cardinal directions in two dimensions.
AxisDirection: A direction along either the horizontal or vertical Axis in which the origin, or zero position, is determined.
BannerLocation: Where to show a Banner.
BlendMode: Algorithms to use when painting on the canvas.
BlurStyle: Styles to use for blurs in MaskFilter objects.
BorderStyle: The style of line to draw for a BorderSide in a Border.
BottomNavigationBarLandscapeLayout: Refines the layout of a BottomNavigationBar when the enclosing MediaQueryData.orientation is Orientation.landscape.
BottomNavigationBarType: Defines the layout and behavior of a BottomNavigationBar.
BoxFit: How a box should be inscribed into another box.
BoxShape: The shape to use when rendering a Border or BoxDecoration.
Brightness: Describes the contrast of a theme or color palette.
ButtonBarLayoutBehavior: Used with ButtonTheme and ButtonThemeData to define how the button bar should size itself with either constraints or internal padding.
ButtonTextTheme: Used with ButtonTheme and ButtonThemeData to define a button's base colors, and the defaults for the button's minimum size, internal padding, and shape.
CacheExtentStyle: The unit of measurement for a Viewport.cacheExtent.
ChangeReportingBehavior: The behavior of reporting the selected item index in a ListWheelScrollView.
Clip: Different ways to clip content.
ClipboardStatus: An enumeration of the status of the content on the user's clipboard.
CollapseMode: The collapsing effect while the space bar collapses from its full size.
ConnectionState: The state of connection to an asynchronous computation.
ContentSensitivity: The possible values for a widget tree's content sensitivity.
ContextMenuButtonType: The buttons that can appear in a context menu by default.
CrossAxisAlignment: How the children should be placed along the cross axis in a flex layout.
CrossFadeState: Specifies which of two children to show. See AnimatedCrossFade.
CursorRotationBehaviour: The behaviour of the cursor/keyboard rotation function in terms of the angle that the map is rotated to
DarwinAssetRepresentationMode: The representation that iOS should provide for assets selected with PHPickerViewController.
DatePickerEntryMode: Mode of date entry method for the date picker dialog.
DatePickerMode: Initial display of a calendar date picker.
DayPeriod: Whether the TimeOfDay is before or after noon.
DebugSemanticsDumpOrder: Used by debugDumpSemanticsTree to specify the order in which child nodes are printed.
DecorationPosition: Where to paint a box decoration.
DeviceOrientation: Specifies a particular device orientation.
DiagnosticLevel: The various priority levels used to filter which diagnostics are shown and omitted.
DiagnosticsTreeStyle: Styles for displaying a node in a DiagnosticsNode tree.
DiagonalDragBehavior: Specifies how to configure the DragGestureRecognizers of a TwoDimensionalScrollable.
DismissDirection: The direction in which a Dismissible can be dismissed.
DragStartBehavior: Configuration of offset passed to DragStartDetails.
DrawerAlignment: The possible alignments of a Drawer.
DropdownMenuCloseBehavior: Defines the behavior for closing the dropdown menu when an item is selected.
DynamicSchemeVariant: The algorithm used to construct a ColorScheme in ColorScheme.fromSeed.
EnPanEntryMode: How the card was read. The value goes into ISO field 22 as-is.
EvictErrorTileStrategy: Strategies on how to handle tile errors
FilePickerStatus: The status of the file picker.
FileType: The type of file that a file picker can select.
FilterQuality: Quality levels for image sampling in ImageFilter and Shader objects that sample images and for Canvas operations that render images.
FlexFit: How the child is inscribed into the available space.
FloatingCursorDragState: The state of a "floating cursor" drag on an iOS soft keyboard.
FloatingHeaderSnapMode: Specifies how a partially visible SliverFloatingHeader animates into a view when a user scroll gesture ends.
FloatingLabelBehavior: Defines how the floating label should behave.
FlutterLogoStyle: Possible ways to draw Flutter's logo.
FocusHighlightMode: An enum to describe which kind of focus highlight behavior to use when displaying focus information.
FocusHighlightStrategy: An enum to describe how the current value of FocusManager.highlightMode is determined. The strategy is set on FocusManager.highlightStrategy.
FontStyle: Whether to use the italic type variation of glyphs in the font.
FoundationServiceExtensions: Service extension constants for the foundation library.
GestureDisposition: Whether the gesture was accepted or rejected.
GestureRecognizerState: The possible states of a PrimaryPointerGestureRecognizer.
GrowthDirection: The direction in which a sliver's contents are ordered, relative to the scroll offset axis.
HeroFlightDirection: Direction of the hero's flight based on the navigation operation.
HitTestBehavior: How to behave during hit tests.
HourFormat: Describes how hours are formatted.
HttpClientResponseCompressionState: Enum that specifies the compression state of the byte stream of an HttpClientResponse.
IconAlignment: Determines the alignment of the icon within the widgets such as:
ImageRepeat: How to paint any portions of a box not covered by an image.
InspectorButtonVariant: Defines the visual and behavioral variants for an InspectorButton.
IsoCipherMode: Cipher mode of the security module.
IsoEncryptionStandard: DES/3DES/AES of the security module.
IsoKeyLength: Key length in bits, as the PED SDKs expect it.
IsoKeyType: Key roles the host assigns during logon.
IsoMacAlgorithm: MAC algorithm of the security module.
IsoSecurityOperation: Which security-module call failed, so the caller can tell a cancelled PIN entry apart from a real fault.
IsoTraceKind: Log entry kind: sent, received, error.
JavaScriptLogLevel: Represents the severity of a JavaScript log message.
JavaScriptMode: Describes the state of JavaScript support in a given web view.
KeyboardLockMode: Represents a lock mode of a keyboard, such as KeyboardLockMode.capsLock.
KeyboardSide: An enum describing the side of the keyboard that a key is on, to allow discrimination between which key is pressed (e.g. the left or right SHIFT key).
KeyDataTransitMode: The mode in which information of key messages is delivered.
KeyEventResult: An enum that describes how to handle a key event handled by a FocusOnKeyCallback or FocusOnKeyEventCallback.
ListTileControlAffinity: Where to place the control in widgets that use ListTile to position a control next to a label.
ListTileStyle: Defines the title font used for ListTile descendants of a ListTileTheme.
ListTileTitleAlignment: Defines how ListTile.leading and ListTile.trailing are vertically aligned relative to the ListTile's titles (ListTile.title and ListTile.subtitle).
LiveTextInputStatus: An enumeration that indicates whether the current device is available for Live Text input.
LoadRequestMethod: Defines the supported HTTP methods for loading a page in PlatformWebViewController.
LockState: Determines how the state of a lock key is used to accept a shortcut.
MainAxisAlignment: How the children should be placed along the main axis in a flex layout.
MainAxisSize: How much space should be occupied in the main axis.
MapEventSource: Event sources which are used to identify different types of MapEvent events
MaterialBannerClosedReason: Specify how a MaterialBanner was closed.
MaterialTapTargetSize: Configures the tap target and layout size of certain Material widgets.
MaterialType: The various kinds of material in Material Design. Used to configure the default behavior of Material widgets.
MaxLengthEnforcement: Mechanisms for enforcing maximum length limits.
ModifierKey: An enum describing the type of modifier key that is being pressed.
MultitouchDragStrategy: Configuration of multi-finger drag strategy on multi-touch devices.
NavigationDecision: A decision on how to handle a navigation request.
NavigationDestinationLabelBehavior: Specifies when each NavigationDestination's label should appear.
NavigationMode: Describes the navigation mode to be set by a MediaQuery widget.
NavigationRailLabelType: Defines the behavior of the labels of a NavigationRail.
OptionsViewOpenDirection: A direction in which to open the options-view overlay.
Orientation: Whether in portrait or landscape.
OverflowBarAlignment: Defines the horizontal alignment of OverflowBar children when they're laid out in an overflow column.
OverflowBoxFit: How much space should be occupied by the OverflowBox if there is no overflow.
OverlayChildLocation: The location of the Overlay that an OverlayPortal renders its overlay child on.
PaintingStyle: Strategies for painting shapes and paths on a canvas.
PanAxis: This enum is used to specify the behavior of the InteractiveViewer when the user drags the viewport.
PathFillType: Determines the winding rule that decides how the interior of a Path is calculated.
PathOperation: Strategies for combining paths.
PatternFit: Determines how a non-solid StrokePattern should be fit to a line when their lengths are not equal or multiples
PerformanceOverlayOption: The options that control whether the performance overlay displays certain aspects of the compositor.
PlaceholderAlignment: Where to vertically align the placeholder relative to the surrounding text.
PlatformProvidedMenuItemType: The list of possible platform provided, prebuilt menus for use in a PlatformMenuBar.
PlatformViewHitTestBehavior: How an embedded platform view behave during hit tests.
PointerDeviceKind: The kind of pointer device.
PolygonLabelPlacement: Defines the algorithm used to calculate the position of the Polygon label.
PolygonPainterFillMethod: The method used by the painter to fill polygons and resolve overlaps & intersections
PopupMenuPosition: Used to configure how the PopupMenuButton positions its popup menu.
RefreshIndicatorStatus: Indicates current status of Material RefreshIndicator.
RefreshIndicatorTriggerMode: Used to configure how RefreshIndicator can be triggered.
RenderAnimatedSizeState: A RenderAnimatedSize can be in exactly one of these states.
RenderComparison: The description of the difference between two objects, in the context of how it will affect the rendering.
RenderingServiceExtensions: Service extension constants for the rendering library.
RepeatMode: Configures how RepeatingAnimationBuilder loops its animation.
ResizeImagePolicy: Configures the behavior for ResizeImage.
RetinaMode: Retina mode improves the resolution of map tiles, particularly on high density displays
RouteInformationReportingType: The Router's intention when it reports a new RouteInformation to the RouteInformationProvider.
RoutePopDisposition: Indicates whether the current route should be popped.
ScalebarLength: The relative length of the scalebar.
ScriptCategory: A characterization of the of a TextTheme's glyphs that is used to define its localized TextStyle geometry for ThemeData.textTheme.
ScrollbarOrientation: An orientation along either the horizontal or vertical Axis.
ScrollDecelerationRate: The rate at which scroll momentum will be decelerated.
ScrollDirection: The direction of a scroll, relative to the positive scroll offset axis given by an AxisDirection and a GrowthDirection.
ScrollIncrementType: Describes the type of scroll increment that will be performed by a ScrollAction on a Scrollable.
ScrollPositionAlignmentPolicy: The policy to use when applying the alignment parameter of ScrollPosition.ensureVisible.
ScrollViewKeyboardDismissBehavior: A representation of how a ScrollView should dismiss the on-screen keyboard.
SelectableRegionSelectionStatus: The status of the selection under a SelectableRegion.
SelectionChangedCause: Indicates what triggered the change in selected text (including changes to the cursor location).
SelectionEventType: The type of a SelectionEvent.
SelectionExtendDirection: The direction to extend a selection.
SelectionResult: The result after handling a SelectionEvent.
SelectionStatus: The status that indicates whether there is a selection and whether the selection is collapsed.
SemanticsRole: An enum to describe the role for a semantics node.
SemanticsValidationResult: The validation result of a form field.
ServicesServiceExtensions: Service extension constants for the services library.
ShowValueIndicator: Describes the conditions under which the value indicator on a Slider will be shown. Used in Slider.showValueIndicator and SliderThemeData.showValueIndicator.
SliderInteraction: Possible ways for a user to interact with a Slider.
SliverPaintOrder: Specifies an order in which to paint the slivers of a Viewport.
SmartDashesType: Indicates how to handle the intelligent replacement of dashes in text input.
SmartQuotesType: Indicates how to handle the intelligent replacement of quotes in text input.
SnackBarBehavior: Defines where a SnackBar should appear within a Scaffold and how its location should be adjusted when the scaffold also includes a FloatingActionButton or a BottomNavigationBar.
SnackBarClosedReason: Specify how a SnackBar was closed.
SnapshotMode: Controls how the SnapshotWidget paints its child.
StackFit: How to size the non-positioned children of a Stack.
StandardComponentType: An enum identifying standard UI components.
StepperType: Defines the Stepper's main axis.
StepState: The state of a Step which is used to control the style of the circle and text.
StorageDirectory: Corresponds to constants defined in Androids android.os.Environment class.
StretchMode: The stretching effect while the space bar stretches beyond its full size.
StrokeCap: Styles to use for line endings.
StrokeJoin: Styles to use for line segment joins.
SwipeEdge: Enum representing the edge from which a swipe starts in a back gesture.
SystemSoundType: A sound provided by the system.
SystemUiMode: Describes different display configurations for both Android and iOS.
SystemUiOverlay: Specifies a system overlay at a particular location.
TabAlignment: Defines how tabs are aligned horizontally in a TabBar.
TabBarIndicatorSize: Defines how the bounds of the selected tab indicator are computed.
TabIndicatorAnimation: Defines how the tab indicator animates when the selected tab changes.
TableCellVerticalAlignment: Vertical alignment options for cells in RenderTable objects.
TagAddress
TagApiLog
TagBankAccount
TagBed
TagBlog
TagCategory
TagComment
TagContent
TagDorm
TagDormBed
TagDormBedContract
TagDormBedInvoice
TagDormRoom
TagFieldType
TagFileFieldType
TagFollow
TagGoldAsset
TagGoldOrderSide
TagGoldOrderStatus
TagGoldTxn
TagHotel
TagHotelInvoice
TagHotelReservation
TagInquiryHistory
TagIpg
TagIpgPayment
TagMedia
TagMerchant
TagMoadi
TagNotification
TagOrderBy
TagParking
TagParkingPayment
TagParkingPlateFlag
TagParkingReport
TagParkingShift
TagParkingStaff
TagParkingSubscription
TagParkingTariff
TagProcessStatus
TagProcessStepStatus
TagProduct
TagReaction
TagRoom
TagSimOperator
TagSmsPanel
TagTerminal
TagTerminalBrand
TagTerminalBroker
TagTextFieldType
TagTicket
TagTxn
TagTxnErrorCodes
TagUser
TagVas
TagVehicle
TagWallet
TagWalletTxn
TargetPlatform: The platform that user interaction should adapt to target.
TextAffinity: A way to disambiguate a TextPosition when its offset could match two different locations in the rendered string.
TextAlign: Whether and how to align text horizontally.
TextBaseline: A horizontal line used for aligning text.
TextCapitalization: Configures how the platform keyboard will select an uppercase or lowercase keyboard.
TextDecorationStyle: The style in which to draw a text decoration
TextDirection: A direction in which text flows.
TextGranularity: The unit of how selection handles move in text.
TextInputAction: An action the user has requested the text input control to perform.
TextLeadingDistribution: How the "leading" is distributed over and under the text.
TextOverflow: How overflowing text should be handled.
TextSelectionHandleType: The type of selection handle to be displayed.
TextWidthBasis: The different ways of measuring the width of one or more lines of text.
ThemeMode: Describes which theme will be used by MaterialApp.
Thumb: Identifier for a thumb.
TileMode: Defines how to handle areas outside the defined bounds of a gradient or image filter.
TimeOfDayFormat: Determines how the time picker invoked using showTimePicker formats and lays out the time controls.
TimePickerEntryMode: Interactive input mode of the time picker dialog.
TooltipTriggerMode: How touch events should trigger a tooltip.
TraversalDirection: A direction along either the horizontal or vertical axes.
TraversalEdgeBehavior: Controls the focus transfer at the edges of a FocusScopeNode. For movement transfers (previous or next), the edge represents the first or last items. For directional transfers, the edge represents the outermost items of the FocusScopeNode, For example: for moving downwards, the edge node is the one with the largest bottom coordinate; for moving leftwards, the edge node is the one with the smallest x coordinate.
UActionType
UAdminHotelContractLifecycle
UAdminHotelContractStatusFilter
UAdminHotelInvoiceStatusFilter
UAdminHotelReservationStatusFilter
UAesMode: AES mode for aesEncrypt/aesDecrypt; cbc is the default, gcm also authenticates, ecb is insecure.
UAlertTone: Color of UAlertBanner: info, success, warning or danger.
UAppStore: Store for ULaunch.store: auto, googlePlay, appStore, bazaar, myket, microsoft, flathub…
UArAltitudeMode: Geo anchor height: absolute, terrain or rooftop.
UArAnchorType: Anchor kind: world, plane, image, face, geo.
UArAvailabilityStatus: AR support: supported, needs install/update, unsupported, unknown.
UArBillboard: Whether a node turns to face the camera.
UArCameraFacing: Back or front camera for AR.
UArCoachingGoal: What the AR coaching overlay asks for: tracking, horizontal plane, any plane, geo.
UArcType: Arc style of UCircularPercentIndicator: half (180°) or full.
UArErrorCode: Why an AR call failed.
UArFocusMode: Camera focus: auto or fixed.
UArGeoMode: Geo AR accuracy: off, compass-only, or VPS (street-level).
UArHitType: What a hit test found: plane, point, estimated plane, depth.
UArImageFormat: Snapshot image format: png or jpeg.
UArLightEstimation: Lighting estimate: off, ambient intensity, or full environment.
UArMeasureUnit: Units of UArMeasure: metric (cm/m) or imperial (in/ft).
UArMode: AR session kind: world (surfaces), face (front camera), image tracking, body, geo.
UArNodeType: 3D node kind: model, box, sphere, plane, text, image, video, widget.
UArObjectCaptureDetail: Object capture model detail: preview, reduced, medium, full, raw.
UArPermission: Permission state: granted, denied, permanentlyDenied, restricted.
UArPivot: Where a model's origin sits: center, bottom, native.
UArPlacementMode: HOST PROJECT SETUP
UArPlaneClassification: What a surface is: floor, wall, ceiling, table, seat, door, window.
UArPlaneDetection: Which surfaces to detect: none, horizontal, vertical, both.
UArPlaneStyle: How detected surfaces are drawn: grid, dots, solid or hidden.
UArPlaneType: Detected surface orientation.
UArSceneReconstruction: LiDAR mesh of the room: off, mesh, mesh with classification.
UArSessionState: AR session state: idle, starting, running, paused, error.
UArSurface: Which surfaces an item may be placed on: any, horizontal, vertical, floor, wall, table, ceiling.
UArTrackingReason: Why tracking is limited: initializing, excessive motion, low light…
UArTrackingState: Tracking quality: notAvailable, limited, normal.
UArVpsAvailability: Whether street-level VPS is available here.
UArWorldAlignment: World axes: gravity, gravity+heading (north), or camera.
UAudioCodec: Audio codec: aac, opus.
UAudioFocusPolicy: What to do when another app plays audio.
UBadgeAnimationType: Badge appear animation: slide, fade, scale or none.
UBadgeShape: Badge shape: circle, square or pill.
UBarcodeModuleShape: Shape of QR dots: square, rounded or circle.
UBarcodeType: Every supported code: qrCode, dataMatrix, aztec, pdf417, code128, EAN/UPC, code39/93, ITF, Codabar, postal codes…
UBase64ImageKind: What a base64 image holds: raster (PNG/JPG…), SVG or Lottie JSON.
UBatteryState: Battery: charging, discharging, full, notCharging, unknown.
UBlockType: Block level types the editor supports. All values except UBlockType.image, UBlockType.divider and UBlockType.table are text blocks that own a URichTextController.
UButtonIconPosition: Icon before (leading) or after (trailing) the title.
UButtonLoadingPosition: Where the spinner shows while loading: replace the content, leading or trailing.
UButtonSize: Preset height/padding: small, medium, large.
UButtonType: Button look: elevated, filled, filledTonal, text, outlined, icon, fab, cupertino, or custom.
UByteEncoding: How a key/IV string is turned into bytes: utf8 (plain text), base64 or hex.
UCameraErrorCode: Why a camera call failed.
UCameraFacing: Camera direction: back, front, external.
UCameraLens: Lens kind: wide, ultraWide, telephoto, dual, triple.
UCameraMode: HOST PROJECT SETUP
UCameraOrientation: Device orientation relative to the sensor.
UCameraPermission: Camera permission: granted, denied, permanentlyDenied, restricted, notDetermined.
UCameraResolution: Preview / capture resolution presets, resolved to the closest supported size.
UCameraState: Camera state: idle, opening, ready, recording, error, closed.
UCardBrand: Card network or Iranian bank detected from the number.
UCardSide: Which side shows first: front or back.
UCircularStrokeCap: End shape of the progress line: round, square or butt.
UCodeFormat: Every readable code: QR, Micro QR, DataMatrix, Aztec, PDF417, EAN/UPC, Code 128/39/93, Codabar, ITF.
UCodeSource: Where a decode came from, so callers can tell the Dart engine apart from a zero-cost platform decoder (Apple Vision, the browser BarcodeDetector).
UCodeType: Which code to look a country up by: ISO2, ISO3 or dial code.
UCodeValueType: Type of payload a QR code carries, derived from the decoded text.
UComparisonOperator
UComposeResult: Result of an email/SMS draft: sent, saved, cancelled, failed, opened, unavailable.
UCountryPickerMode: How UTextFieldPhoneNumber opens its country list.
UCropShape: Crop frame shape: rectangle or circle.
UDeviceType: Device kind: phone, tablet, desktop, tv, watch, car, web.
UDigitLocale: Digit style for UPersianTools.convertDigits: en (0-9), fa (۰-۹), ar (٠-٩).
UDocAnnotationKind: PDF annotation types (highlight, ink, note, link, widget…).
UDocColorMode: Page colors: normal, night, sepia, grayscale, highContrast.
UDocDirection: Reading direction: ltr or rtl.
UDocDrawTool: Active tool of a UDocShapeLayer. none leaves the surface to the reader.
UDocErrorCode: Why a document failed: notFound, badPassword, corrupt, unsupported, network…
UDocFieldKind: PDF form field types (text, checkbox, radio, choice, signature).
UDocFit: Zoom fit: width, height, page.
UDocKind: Document type: pdf or epub.
UDocMarkupKind: Kinds of user markup layered on top of PDF pages and EPUB text.
UDocNoteDisplay: How notes attached to markups are shown on the page.
UDocOcrEngine: OCR engine for scanned pages.
UDocPermission: PDF owner permissions (print, copy, modify…).
UDocSaveMode: Save incrementally (fast) or fully rewrite.
UDocScrollMode: Page flow: vertical, horizontal, single page.
UDocShapeKind: Free drawing and shapes layered over a page, an EPUB paragraph or a video frame.
UDocShapeSpace: How shape coordinates are normalised. box divides x by width and y by height (fixed-aspect surfaces: PDF pages, video frames); width divides both by width (reflowable EPUB paragraphs whose height changes).
UDocSourceKind: Where a document comes from: file, bytes, url, asset.
UDocSpread: One page or two side by side.
UDocState: Document state: loading, ready, error.
UDocTextGeometry: How text ranges are turned into rectangles.
UDownloadCategory: video, audio, image, document, archive, apk, other.
UDownloadConflict: What to do when the destination file already exists.
UDownloadErrorCode: Why a download failed: network, http, disk, checksum, canceled…
UDownloadPriority: low, normal, high.
UDownloadStatus: queued, running, paused, completed, failed, canceled.
UDownloadTarget: Where it is saved: downloads, file, storage, vault, memory.
UDrmScheme: DRM: widevine, playready, clearkey, fairplay.
UEpubBlockKind: Block type: paragraph, heading, image, list, quote, code, table…
UEqualizerPreset: Built-in equalizer presets.
UErrorCorrectionLevel: QR error correction: low, medium, quartile, high (higher survives damage/logos).
UExposureMode: Exposure: auto, locked, custom.
UFieldType
UFieldWidth
UFileType
UFill: Which side sets the size: none, fillFront, fillBack.
UFlashMode: Flash: off, auto, on, torch.
UFlipDirection: Flip axis: horizontal or vertical.
UFocusMode: Focus: auto, continuous, locked, manual.
UFrameFormat: Live frame pixel format for image analysis.
UGeofenceTransition: Geofence event: enter, exit or dwell.
UHapticType: Kind of vibration for UApp.haptic: light, medium, heavy, selection, success, warning, error.
UHashAlgorithm: Checksum algorithm for downloads: md5, sha1, sha256, sha512, crc32.
UHdrMode: HDR: off, auto, on.
UHwAccel: Hardware decoding preference.
UiKitViewGestureBlockingPolicy: How touch event callbacks and gesture recognizers of a platform view are blocked.
UImageSource: Where pickImage/pickVideo take media from: the gallery or the camera.
UInlineAttr: A self-contained, cross-platform rich text editor that produces and consumes HTML. No third-party editor packages are used.
UInstaller: Where the app was installed from: googlePlay, appStore, testFlight, bazaar, myket, microsoftStore, sideload…
UIsoErrorCode: Why an ISO8583 call failed before a host answer: cannotConnect, noResponse, badResponseMac, notLoggedOn, securityModuleFailed, badRequest.
UJalaliDatePickerType: Jalali picker look: classic dialog, material calendar or spinner wheels.
ULaunchMode: How a URL opens: platformDefault, inApp, external, nonBrowser.
ULibrarySort: Library sort: title, artist, album, date, plays.
ULocationAccuracy: Accuracy wanted: lowest (~3 km), low (~1 km), medium (~100 m), high (~10 m), best, navigation.
ULocationActivity: iOS activity hint: lets the OS pause updates smartly and save battery.
ULocationError: Why a position could not be read: permissionDenied, serviceDisabled, timeout, notDeclared, unsupported…
ULocationPermissionStatus: Location permission: granted, grantedWhenInUse, denied, permanentlyDenied, restricted, notDetermined, notDeclared (missing from Info.plist/manifest), unsupported.
ULogicalOperator
UMapApp: Map app for ULaunch.map/directions: system, neshan, balad, google, waze, apple.
UMapTileProvider: Map tiles: openStreetMap, mapBox, openTopoMap… (online).
UMediaErrorCode: Why playback failed.
UMediaFit: Video fit: contain, cover, fill, 16:9, 4:3…
UMediaKind: Player kind: video or audio.
UMediaLogLevel: Player log verbosity.
UMediaSourceKind: Source type: network, file, asset, bytes, content.
UMediaState: Player state: idle, loading, ready, playing, paused, buffering, completed, error.
UMediaTrackType: Track type: video, audio, subtitle.
UMessenger: Messenger for ULaunch.chat: whatsapp, telegram, eitaa, rubika, bale, soroush, instagram, x.
UMusicPlayerLayout: UMusicPlayer layout: full page, card or compact row.
UndoDirection: The direction in which an undo action should be performed, whether undo or redo.
UNetworkType: Connection kind: wifi, cellular, ethernet, vpn, bluetooth, satellite, other.
UnfocusDisposition: Describe what should happen after FocusNode.unfocus is called.
UNightMode: Night mode: off, auto, on.
UNotificationEventType: Event kind: tap, action (button), reply, dismissed.
UNotificationImportance: How loud a notification is: min, low, normal, high (heads-up), max.
UNotificationInterruption: iOS 15+ interruption level: timeSensitive breaks through Focus; critical needs an Apple entitlement.
UNotificationPermissionStatus: granted, provisional, denied, notDetermined, unsupported.
UNotificationVisibility: Lock-screen visibility (Android).
UNumericKeyboardActionsPosition: Where extra action buttons go: top, bottom, start or end.
UOtpCellState: State of one OTP cell: empty, focused, filled, error.
UOtpKeyboardMode: Keyboard for UOtpField: system keyboard or the built-in numeric pad.
UPageState: Page loading states: initial, loading, loaded, error, empty, paging (loading more).
UpdateType: Result of the version check: none, optional (can skip) or force (must update).
UPdfAnnotationStyle: Annotation look (color, width, opacity).
UPdfCryptMethod: Internal: PDF encryption method.
UPdfTool: PDF editor tool: select, highlight, underline, strikeOut, ink, eraser, note, textBox, rectangle, ellipse, arrow, redact.
UPhotoFormat: Photo file type: jpeg, png, heic, raw.
UPipState: Picture-in-picture state.
UQrEcLevel: QR error correction level L/M/Q/H.
URepeat: Repeat: none, minutely, hourly, daily, weekly, monthly, yearly.
URepeatCalendar: Calendar for monthly / yearly repeats: "every 1st of the month" in Jalali or Gregorian.
URepeatMode: Repeat: off, one, all.
URequestBodyType: How UHttpClient encodes a Map body: json or formData (x-www-form-urlencoded).
URouteTransitions: Page transition for push/off/dialogs: none, fade, fadeScale, slideFade, rightToLeft, leftToRight, upToDown, downToUp, scale, rotate, size.
Usc
UScanEngine: How barcode decoding is performed for a session.
UScannerHintPosition: Hint above (top) or below (bottom) the scan window.
UScanSpeed: How aggressively frames are decoded. Slower settings cost less battery.
USettingsPage: System settings pages for ULaunch.settings (app, notifications, location, wifi, bluetooth, battery…).
UShareStatus: Share result: success, dismissed, shown (no result on this platform), copied (Linux clipboard), unavailable.
UShareTarget: App for UShare.to: whatsapp, telegram, eitaa, rubika, bale, soroush, instagram, x, email, sms…
USideMenuIndicatorStyle: How the selected item is highlighted: bar, pill, filled, gradient or none.
USideMenuMode: Side menu state: expanded, rail (icons only) or hidden (drawer).
USimCardType: Iranian SIM type: credit (اعتباری), permanent (دائمی) or both.
UStabilizationMode: Video stabilization: off, standard, cinematic.
UStorageBucket: Storage area: support (kept), documents, cache (may be evicted), temp, vault (encrypted), downloads.
UStorageEventType: added, changed, removed.
UStreamProtocol: Stream type: progressive, hls, dash, rtsp, rtmp.
USubtitleFormat: Subtitle format: srt, vtt, ass, lrc, microdvd.
UTabMenuAction: Tab context menu actions: close, closeOthers, closeAll, closeToRight.
UThermalState: Device heat: nominal, fair, serious, critical.
UToastPosition: Where a toast appears: top, center or bottom.
UToastType: Color and icon style of a message: neutral, info, success, warning, error.
UTravelMode: Directions mode: driving, walking, transit, bicycling.
UTrimMode: Cut by characters (length) or by lines.
UVideoCodec: Video codec: h264, hevc, vp9, av1.
UVideoContainer: Video file type: mp4, mov, webm.
UVisualizerStyle: Visualizer look: bars, mirroredBars, wave or circle.
UWhiteBalanceMode: White balance: auto, locked, presets.
VertexMode: Defines how a list of points is interpreted when drawing a set of triangles.
VerticalDirection: A direction in which boxes flow vertically.
WebHtmlElementStrategy: The strategy for Image.network and NetworkImage to decide whether to display images in HTML elements contained in a platform view instead of fetching bytes.
WebResourceErrorType: Possible error type categorizations used by WebResourceError.
WebViewDataType: A category of persistent or session website data used by WebViews.
WebViewOverScrollMode: Defines the over-scroll behavior of a WebView.
WebViewUserScriptInjectionTime: The lifecycle point at which a user script is injected.
WidgetInspectorServiceExtensions: Service extension constants for the Widget Inspector.
WidgetsServiceExtensions: Service extension constants for the widgets library.
WidgetState: Interactive states that some of the widgets can take on when receiving input from the user.
WrapAlignment: How Wrap should align objects.
WrapCrossAlignment: Who Wrap should align children within a run in the cross axis.

Mixins

AnimationEagerListenerMixin: A mixin that replaces the didRegisterListener/didUnregisterListener contract with a dispose contract.
AnimationLazyListenerMixin: A mixin that helps listen to another object only when this object has registered listeners.
AnimationLocalListenersMixin: A mixin that implements the addListener/removeListener protocol and notifies all the registered listeners when notifyListeners is called.
AnimationLocalStatusListenersMixin: A mixin that implements the addStatusListener/removeStatusListener protocol and notifies all the registered listeners when notifyStatusListeners is called.
AnimationWithParentMixin<T>: Implements most of the Animation interface by deferring its behavior to a given parent Animation.
AutofillScopeMixin: A partial implementation of AutofillScope.
AutomaticKeepAliveClientMixin<T extends StatefulWidget>: A mixin with convenience methods for clients of AutomaticKeepAlive. It is used with State subclasses to manage keep-alive behavior in lazily built lists.
BaseRangeSliderTrackShape: Base range slider track shape that provides an implementation of getPreferredRect for default sizing.
BaseSliderTrackShape: Base track shape that provides an implementation of getPreferredRect for default sizing.
ContainerParentDataMixin<ChildType extends RenderObject>: Parent data to support a doubly-linked list of children.
ContainerRenderObjectMixin<ChildType extends RenderObject, ParentDataType extends ContainerParentDataMixin<ChildType>>: Generic mixin for render objects with a list of children.
DebugOverflowIndicatorMixin: An mixin indicator that is drawn when a RenderObject overflows its container.
DeltaTextInputClient: An interface to receive granular information from TextInput.
Diagnosticable: A mixin class for providing string and DiagnosticsNode debug representations describing the properties of an object.
DiagnosticableTreeMixin: A mixin that helps dump string and DiagnosticsNode representations of trees.
DirectionalFocusTraversalPolicyMixin: A mixin class that provides an implementation for finding a node in a particular direction.
FabCenterOffsetX: Mixin for a "center" floating action button location, such as FloatingActionButtonLocation.centerFloat.
FabContainedOffsetY: Mixin for a "contained" floating action button location, such as FloatingActionButtonLocation.endContained.
FabDockedOffsetY: Mixin for a "docked" floating action button location, such as FloatingActionButtonLocation.endDocked.
FabEndOffsetX: Mixin for an "end" floating action button location, such as FloatingActionButtonLocation.endDocked.
FabFloatOffsetY: Mixin for a "float" floating action button location, such as FloatingActionButtonLocation.centerFloat.
FabMiniOffsetAdjustment: Mixin for a "mini" floating action button location, such as FloatingActionButtonLocation.miniStartTop.
FabStartOffsetX: Mixin for a "start" floating action button location, such as FloatingActionButtonLocation.startTop.
FabTopOffsetY: Mixin for a "top" floating action button location, such as FloatingActionButtonLocation.startTop.
GestureBinding: A binding for the gesture subsystem.
KeepAliveParentDataMixin: Parent data structure used by RenderSliverWithKeepAliveMixin.
LocalHistoryRoute<T>: A mixin used by routes to handle back navigations internally by popping a list.
MaterialRouteTransitionMixin<T>: A mixin that provides platform-adaptive transitions for a PageRoute.
MaterialStateMixin<T extends StatefulWidget>: Mixin for State classes that require knowledge of changing WidgetState values for their child widgets.
MenuSerializableShortcut: A mixin allowing a ShortcutActivator to provide data for serialization of the shortcut when sending to the platform.
NativeHitTestTarget: A mixin that represents a hit test target backed by a platform view.
NotifiableElementMixin: Mixin this class to allow receiving Notification objects dispatched by child elements.
PaintingBinding: Binding for the painting library.
PopNavigatorRouterDelegateMixin<T>: A mixin that wires RouterDelegate.popRoute to the Navigator it builds.
RadioClient<T>: A client for a RadioGroupRegistry.
RelayoutWhenSystemFontsChangeMixin: Mixin for RenderObject that will call systemFontsDidChange whenever the system fonts change.
RenderAbstractLayoutBuilderMixin<LayoutInfoType, ChildType extends RenderObject>: Generic mixin for RenderObjects created by an AbstractLayoutBuilder with the same LayoutInfoType.
RenderAnimatedOpacityMixin<T extends RenderObject>: Implementation of RenderAnimatedOpacity and RenderSliverAnimatedOpacity.
RenderBoxContainerDefaultsMixin<ChildType extends RenderBox, ParentDataType extends ContainerBoxParentData<ChildType>>: A mixin that provides useful default behaviors for boxes with children managed by the ContainerRenderObjectMixin mixin.
RendererBinding: The glue between the render trees and the Flutter engine.
RenderInlineChildrenContainerDefaults: A mixin that provides useful default behaviors for text RenderBoxes (RenderParagraph and RenderEditable for example) with inline content children managed by the ContainerRenderObjectMixin mixin.
RenderObjectWithChildMixin<ChildType extends RenderObject>: Generic mixin for render objects with one child.
RenderObjectWithLayoutCallbackMixin: A mixin for managing RenderObject with a layoutCallback, which will be invoked during this RenderObject's layout process if scheduled using scheduleLayoutCallback.
RenderProxyBoxMixin<T extends RenderBox>: Implementation of RenderProxyBox.
RenderSliverHelpers: Mixin for RenderSliver subclasses that provides some utility functions.
RenderSliverWithKeepAliveMixin: This class exists to dissociate KeepAlive from RenderSliverMultiBoxAdaptor.
RestorationMixin<S extends StatefulWidget>: Manages the restoration data for a State object of a StatefulWidget.
RootElementMixin: Mixin for the element at the root of the tree.
ScrollMetrics: A description of a Scrollable's contents, useful for modeling the state of its viewport.
Selectable: A mixin that can be selected by users when under a SelectionArea widget.
SelectionRegistrant: A mixin to auto-register the mixer to the registrar.
SemanticsAnnotationsMixin: A mixin for RenderObjects that want to annotate the SemanticsNode for their subtree.
SemanticsBinding: The glue between the semantics layer and the Flutter engine.
ServicesBinding: Listens for platform messages and directs them to the defaultBinaryMessenger.
SingleTickerProviderStateMixin<T extends StatefulWidget>: Provides a single Ticker that is configured to only tick while the current tree is enabled, as defined by TickerMode.
SlottedContainerRenderObjectMixin<SlotType, ChildType extends RenderObject>: Mixin for a RenderObject configured by a SlottedMultiChildRenderObjectWidget.
SlottedMultiChildRenderObjectWidgetMixin<SlotType, ChildType extends RenderObject>: A mixin version of SlottedMultiChildRenderObjectWidget.
SystemContextMenuClient: An interface to receive calls related to the system context menu from the engine.
TextInputClient: An interface to receive information from TextInput.
TextInputControl: An interface for implementing text input controls that receive text editing state changes and visual input control requests.
TextSelectionDelegate: A mixin for manipulating the selection, provided for toolbar or shortcut keys.
TextSelectionHandleControls: TextSelectionControls that specifically do not manage the toolbar in order to leave that to EditableText.contextMenuBuilder.
TickerProviderStateMixin<T extends StatefulWidget>: Provides Ticker objects that are configured to only tick while the current tree is enabled, as defined by TickerMode.
ToggleableStateMixin<S extends StatefulWidget>: A mixin for StatefulWidgets that implement toggleable controls with toggle animations (e.g. Switches, CupertinoSwitches, Checkboxes, CupertinoCheckboxes, Radios, and CupertinoRadios).
TreeSliverStateMixin<T>: A mixin for classes implementing a tree structure as expected by a TreeSliverController.
UArLifecycle<T extends StatefulWidget>: Pauses the session with the app and resumes it after.
UndoManagerClient: An interface to receive events from a native UndoManager.
UNumericIdentifiable
ViewportElementMixin: A mixin that allows Elements containing Viewport like widgets to correctly modify the notification depth of a ViewportNotificationMixin.
ViewportNotificationMixin: Mixin for Notifications that track how many RenderAbstractViewport they have bubbled through.
WidgetInspectorService: Service used by GUI tools to interact with the WidgetInspector.
WidgetsBinding: The glue between the widgets layer and the Flutter engine.
WidgetStatesConstraint: This mixin allows WidgetState enum values to be combined using the &, |, and ~ operators.

Extension Types

BaselineOffset: A wrapper that represents the baseline location of a RenderBox.
OverlayChildLayoutInfo: The additional layout information available to the OverlayPortal.overlayChildLayoutBuilder callback.

Extensions

Base64BytesExtensions on Uint8List: Base64 helpers on bytes. bytes.toBase64()
CategoryListExtension on Iterable<UCategoryResponse>
ChunkedStreamReaderByteStreamExt on ChunkedStreamReader<int>: Extensions for using ChunkedStreamReader with byte-streams.
CircularStrokeCapExtension on UCircularStrokeCap: Converts UCircularStrokeCap to a StrokeCap.
ContentListExtension on Iterable<UContentResponse>
DateTimeExtensions on DateTime: Formatting, Jalali conversion, "time ago" and day math on DateTime. DateTime.now().toJalaliDate()
DoubleExtionsion on double: Rounding and money formatting on doubles. 1234.5.separate3By3()
FutureExtensions on Future<T>: Convenience methods on futures.
FutureIterable on Iterable<Future<T>>
FutureRecord2 on (Future<T1>, Future<T2>): Parallel operations on a record of futures.
FutureRecord3 on (Future<T1>, Future<T2>, Future<T3>): Parallel operations on a record of futures.
FutureRecord4 on (Future<T1>, Future<T2>, Future<T3>, Future<T4>): Parallel operations on a record of futures.
FutureRecord5 on (Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>): Parallel operations on a record of futures.
FutureRecord6 on (Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>, Future<T6>): Parallel operations on a record of futures.
FutureRecord7 on (Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>, Future<T6>, Future<T7>): Parallel operations on a record of futures.
FutureRecord8 on (Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>, Future<T6>, Future<T7>, Future<T8>): Parallel operations on a record of futures.
FutureRecord9 on (Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>, Future<T6>, Future<T7>, Future<T8>, Future<T9>): Parallel operations on a record of futures.
GenericIterableExtensions on Iterable<T>: List helpers: indexes, safe lookups, grouping, sorting, chunks, sums. users.groupBy((u) => u.city)
HeadersWithSplitValues on BaseResponse
HTTP on Response?: Status helpers on an http Response. if (response.isSuccessful()) …
IntExtesion on int: Money, counts, time and month-name helpers on ints. 1500000.toman()
JalaliExt on UJalali: Formatting, comparisons and day math on UJalali. UJalali.now().formatCustom("wN dd mN yyyy")
MapAddExtension on Map<K, V>: Map helpers: add, typed reads, drop nulls, merge. json.getOr<int>("count", 0)
MediaListExtension on Iterable<UMediaResponse>
NullableCategoryListExtension on Iterable<UCategoryResponse>?
NullableIterableExtensions on Iterable<T>?: Null-safe checks on lists that may be null. response.items.isNullOrEmpty()
NullableWalletExtension on UWalletTxnResponse
NullableWalletListExtension on Iterable<UWalletResponse>?
NumericEnumExtension on Iterable<T>
NumExtension on num: Helpers on every number: durations, file sizes, percentages, Persian words. 5.seconds, 1536.toBKMG()
OptionalDoubleExtension on double?: Money formatting on double? (null counts as 0, decimals dropped). price.toman()
OptionalIntExtension on int?: Money formatting on int? (null counts as 0). user.balance.toman()
OptionalStringExtension on String?: Null-safe helpers on String? (null counts as empty). json["name"].isNullOrEmpty()
RxBoolExt on bool: .obs on bool → URxBool.
RxDoubleExt on double: .obs on double → URxDouble.
RxIntExt on int: .obs on int → URxInt.
RxListExt on List<E>: .obs on List → URxList.
RxMapExt on Map<K, V>: .obs on Map → URxMap.
RxnBoolExt on bool?: .obs on bool? → URxnBool.
RxnDoubleExt on double?: .obs on double? → URxnDouble.
RxnIntExt on int?: .obs on int? → URxnInt.
RxnListExt on List<E>?: .obs on List? → URxList (null becomes empty).
RxnMapExt on Map<K, V>?: .obs on Map? → URxMap (null becomes empty).
RxnNumExt on num?: .obs on num? → URxnNum.
RxnSetExt on Set<E>?: .obs on Set? → URxSet (null becomes empty).
RxnStringExt on String?: .obs on String? → URxnString.
RxNumExt on num: .obs on num → URxNum.
RxObjectExt on T: .obs on any value. final URx<User> user = User().obs;
RxSetExt on Set<E>: .obs on Set → URxSet.
RxStringExt on String: .obs on String → URxString.
StreamExtensions on Stream<T>: Utility extensions on Stream.
StreamSinkExtensions on StreamSink<T>: Extensions on StreamSink to make stream transformations more fluent.
StringCharacters on String
StringExtensions on String: Everyday String helpers: numbers, money, Persian digits, dates, file names, validation, encodings. "۱۲۳".toLatinNumber()
TagListExtension on UUserResponse
TextEditingControllerExtension on TextEditingController: Shortcuts on a TextEditingController for number fields and on-screen keyboards. controller.numInt()
UAdminResponsiveContext on BuildContext
UCameraOrientationX on UCameraOrientation: Rotation helpers for UCameraOrientation.
UCodeFormatX on UCodeFormat: Names and 1D/2D checks for UCodeFormat.
UContextExtension on BuildContext: Theme, screen size, keyboard and locale shortcuts on BuildContext. context.colorScheme.primary, context.width
UDurationExtension on Duration: Readable durations. 90.seconds.toClock() → "01:30"
UGoldTxnExtension on UGoldTxnResponse
UHotelInvoiceStatusX on UHotelInvoiceResponse
UHotelReservationStatusX on UHotelReservationResponse
UInvoiceStatusX on UDormBedInvoiceResponse
UPdfDocumentPages on UPdfDocument: Page helpers on UPdfDocument.
UPdfEditAnnotations on UPdfEdit: Annotation operations on UPdfEdit.
UPdfEditDocumentOps on UPdfEdit: Page operations on UPdfEdit.
UScanSpeedX on UScanSpeed: Timing of a UScanSpeed.
UTxnReceiptExtension on UTxnResponse
UWalletTxnReceiptExtension on UWalletTxnResponse
UWidgetListExtension on List<Widget>: Spacing helpers for widget lists. children: [a, b, c].withSpacing(8)
WidgetsExtension on Widget: Chainable wrappers for any widget: padding, taps, alignment, visibility, decoration. Text("Hi").pAll(8).onTap(open)

Constants

accelerateEasing → const Curve: The accelerate easing curve in the Material 2 specification.
appBuildName → const String?: The build name this application was built with.
appBuildNumber → const String?: The build number this application was built with.
appFlavor → const String?: The flavor this app was built with.
ascii → const AsciiCodec: An instance of the default implementation of the AsciiCodec.
awaitNotRequired → const Object: Annotation on asynchronous function whose Future can be ignored.
base64 → const Base64Codec: A base64 encoder and decoder.
base64Url → const Base64Codec: A base64url encoder and decoder.
decelerateEasing → const Curve: The decelerate easing curve in the Material 2 specification.
e → const double: Base of the natural logarithms.
earthRadius → const double: Earth radius in meter
equatorRadius → const double: Equator radius in meter (WGS84 ellipsoid)
factory → const Object: Annotation on a function that creates new objects.
flattening → const double: WGS84
gzip → const GZipCodec: An instance of the default implementation of the GZipCodec.
htmlEscape → const HtmlEscape: A String converter that converts characters to HTML entities.
immutable → const Immutable: Annotation on an immutable class.
internal → const Object: Annotation on declaration that should not be used outside of its package.
iOSHorizontalOffset → const int: An eyeballed value that moves the cursor slightly left of where it is rendered for text on Android so its positioning more accurately matches the native iOS text cursor positioning.
json → const JsonCodec: An instance of the default implementation of the JsonCodec.
kAlwaysCompleteAnimation → const Animation<double>: An animation that is always complete.
kAlwaysDismissedAnimation → const Animation<double>: An animation that is always dismissed.
kAndroidNumPadMap → const Map<int, LogicalKeyboardKey>: A map of Android key codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kAndroidToLogicalKey → const Map<int, LogicalKeyboardKey>: Maps Android-specific key codes to the matching LogicalKeyboardKey.
kAndroidToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps Android-specific scan codes to the matching PhysicalKeyboardKey.
kBackMouseButton → const int: The bit of PointerEvent.buttons that corresponds to the back mouse button.
kBottomNavigationBarHeight → const double: The height of the bottom navigation bar.
kDebugMode → const bool: A constant that is true if the application was compiled in debug mode.
kDefaultContentInsertionMimeTypes → const List<String>: The default mime types to be used when allowedMimeTypes is not provided.
kDefaultFontSize → const double: The default font size if none is specified.
kDefaultMouseScrollToScaleFactor → const double: The default conversion factor when treating mouse scrolling as scaling.
kDefaultRouteDirectionalTraversalEdgeBehavior → const TraversalEdgeBehavior: The default value of Navigator.routeDirectionalTraversalEdgeBehavior.
kDefaultRouteTraversalEdgeBehavior → const TraversalEdgeBehavior: The default value of Navigator.routeTraversalEdgeBehavior.
kDefaultTrackpadScrollToScaleFactor → const Offset: The default conversion factor when treating trackpad scrolling as scaling.
kDoubleTapMinTime → const Duration: The minimum time from the end of the first tap to the start of the second tap in a double-tap gesture.
kDoubleTapSlop → const double: Distance between the initial position of the first touch and the start position of a potential second touch for the second touch to be considered the second touch of a double-tap gesture.
kDoubleTapTimeout → const Duration: The maximum time from the start of the first tap to the start of the second tap in a double-tap gesture.
kDoubleTapTouchSlop → const double: The maximum distance that the first touch in a double-tap gesture can travel before deciding that it is not part of a double-tap gesture. DoubleTapGestureRecognizer also restricts the second touch to this distance.
kElevationToShadow → const Map<int, List<BoxShadow>>: Map of elevation offsets used by Material Design to BoxShadow definitions.
kFloatingActionButtonMargin → const double: The margin that a FloatingActionButton should leave between it and the edge of the screen.
kFloatingActionButtonSegue → const Duration: The amount of time the FloatingActionButton takes to transition in or out.
kFloatingActionButtonTurnInterval → const double: The fraction of a circle the FloatingActionButton should turn when it enters.
kFlutterMemoryAllocationsEnabled → const bool: If true, Flutter objects dispatch the memory allocation events.
kForwardMouseButton → const int: The bit of PointerEvent.buttons that corresponds to the forward mouse button.
kFuchsiaToLogicalKey → const Map<int, LogicalKeyboardKey>: Maps Fuchsia-specific IDs to the matching LogicalKeyboardKey.
kFuchsiaToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps Fuchsia-specific USB HID Usage IDs to the matching PhysicalKeyboardKey.
kGlfwNumpadMap → const Map<int, LogicalKeyboardKey>: A map of GLFW key codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kGlfwToLogicalKey → const Map<int, LogicalKeyboardKey>: Maps GLFW-specific key codes to the matching LogicalKeyboardKey.
kGtkNumpadMap → const Map<int, LogicalKeyboardKey>: A map of GTK key codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kGtkToLogicalKey → const Map<int, LogicalKeyboardKey>: Maps GTK-specific key codes to the matching LogicalKeyboardKey.
kHoverTapSlop → const double: Maximum distance between the down and up pointers for a tap. (Currently not honored by the TapGestureRecognizer; PrimaryPointerGestureRecognizer, which TapGestureRecognizer inherits from, uses kTouchSlop.)
kHoverTapTimeout → const Duration: Maximum length of time between a tap down and a tap up for the gesture to be considered a tap. (Currently not honored by the TapGestureRecognizer.)
kIosNumPadMap → const Map<int, LogicalKeyboardKey>: A map of iOS key codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kIosSpecialLogicalMap → const Map<String, LogicalKeyboardKey>: Maps iOS specific string values of nonvisible keys to logical keys
kIosToLogicalKey → const Map<int, LogicalKeyboardKey>: A map of iOS key codes presenting LogicalKeyboardKey.
kIosToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps iOS-specific key code values representing PhysicalKeyboardKey.
kIsWasm → const bool: A constant that is true if the application was compiled to WebAssembly.
kIsWeb → const bool: A constant that is true if the application was compiled to run on the web.
kJumpTapTimeout → const Duration: The maximum time from the start of the first tap to the start of the second tap in a jump-tap gesture.
kLinuxToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps XKB specific key code values representing PhysicalKeyboardKey.
kLongPressTimeout → const Duration: The time before a long press gesture attempts to win.
kMacOsFunctionKeyMap → const Map<int, LogicalKeyboardKey>: A map of macOS key codes which are numbered function keys, so that they can be excluded when asking "is the Fn modifier down?".
kMacOsNumPadMap → const Map<int, LogicalKeyboardKey>: A map of macOS key codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kMacOsToLogicalKey → const Map<int, LogicalKeyboardKey>: A map of macOS key codes presenting LogicalKeyboardKey.
kMacOsToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps macOS-specific key code values representing PhysicalKeyboardKey.
kMaterialEdges → const Map<MaterialType, BorderRadius?>: The border radii used by the various kinds of material in Material Design.
kMaterialListPadding → const EdgeInsets: The padding added around material list items.
kMaxFlingVelocity → const double: Drag gesture fling velocities are clipped to this value.
kMaxUnsignedSMI → const int: The largest SMI value.
kMiddleMouseButton → const int: The bit of PointerEvent.buttons that corresponds to the middle mouse button.
kMinFlingVelocity → const double: The minimum velocity for a touch to consider that touch to trigger a fling gesture.
kMiniButtonOffsetAdjustment → const double: If a FloatingActionButton is used on a Scaffold in certain positions, it is moved kMiniButtonOffsetAdjustment pixels closer to the edge of the screen.
kMinInteractiveDimension → const double: The minimum dimension of any interactive region according to Material guidelines.
kNoDefaultValue → const Object: Marker object indicating that a DiagnosticsNode has no default value.
kPagingTouchSlop → const double: The distance a touch has to travel for the framework to be confident that the gesture is a paging gesture. (Currently not used, because paging uses a regular drag gesture, which uses kTouchSlop.)
kPanSlop → const double: The distance a touch has to travel for the framework to be confident that the gesture is a panning gesture.
kPrecisePointerHitSlop → const double: Like kTouchSlop, but for more precise pointers like mice and trackpads.
kPrecisePointerPanSlop → const double: Like kPanSlop, but for more precise pointers like mice and trackpads.
kPrecisePointerScaleSlop → const double: Like kScaleSlop, but for more precise pointers like mice and trackpads.
kPressTimeout → const Duration: The time that must elapse before a tap gesture sends onTapDown, if there's any doubt that the gesture is a tap.
kPrimaryButton → const int: The bit of PointerEvent.buttons that corresponds to a cross-device behavior of "primary operation".
kPrimaryMouseButton → const int: The bit of PointerEvent.buttons that corresponds to the primary mouse button.
kPrimaryStylusButton → const int: The bit of PointerEvent.buttons that corresponds to the primary stylus button.
kProfileMode → const bool: A constant that is true if the application was compiled in profile mode.
kProfilePlatformChannels → const bool: Controls whether platform channel usage can be debugged in release mode.
kRadialReactionAlpha → const int: The value of the alpha channel to use when drawing a circular material ink response.
kRadialReactionDuration → const Duration: The amount of time a circular material ink response should take to expand to its full size.
kRadialReactionRadius → const double: The default radius of a circular material ink response in logical pixels.
kReleaseMode → const bool: A constant that is true if the application was compiled in release mode.
kScaleSlop → const double: The distance a touch has to travel for the framework to be confident that the gesture is a scale gesture.
kSecondaryButton → const int: The bit of PointerEvent.buttons that corresponds to a cross-device behavior of "secondary operation".
kSecondaryMouseButton → const int: The bit of PointerEvent.buttons that corresponds to the secondary mouse button.
kSecondaryStylusButton → const int: The bit of PointerEvent.buttons that corresponds to the secondary stylus button.
kStylusContact → const int: The bit of PointerEvent.buttons that corresponds to when a stylus contacting the screen.
kTabLabelPadding → const EdgeInsets: The horizontal padding included by Tabs.
kTabScrollDuration → const Duration: The duration of the horizontal scroll animation that occurs when a tab is tapped.
kTertiaryButton → const int: The bit of PointerEvent.buttons that corresponds to a cross-device behavior of "tertiary operation".
kTextHeightNone → const double: A TextStyle.height value that indicates the text span should take the height defined by the font, which may not be exactly the height of TextStyle.fontSize.
kTextTabBarHeight → const double: The height of a tab bar containing text.
kThemeAnimationDuration → const Duration: The duration over which theme changes animate by default.
kThemeChangeDuration → const Duration: The amount of time theme change animations should last.
kToolbarHeight → const double: The height of the toolbar component of the AppBar.
kTouchContact → const int: The bit of PointerEvent.buttons that corresponds to the pointer contacting a touch screen.
kTouchSlop → const double: The distance a touch has to travel for the framework to be confident that the gesture is a scroll gesture, or, inversely, the maximum distance that a touch can travel before the framework becomes confident that it is not a tap.
kWebLocationMap → const Map<String, List<LogicalKeyboardKey?>>: A map of Web KeyboardEvent keys which needs to be decided based on location, typically for numpad keys and modifier keys. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kWebNumPadMap → const Map<String, LogicalKeyboardKey>: A map of Web KeyboardEvent codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kWebToLogicalKey → const Map<String, LogicalKeyboardKey>: Maps Web KeyboardEvent codes to the matching LogicalKeyboardKey.
kWebToPhysicalKey → const Map<String, PhysicalKeyboardKey>: Maps Web KeyboardEvent codes to the matching PhysicalKeyboardKey.
kWindowsNumPadMap → const Map<int, LogicalKeyboardKey>: A map of Windows KeyboardEvent codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kWindowsToLogicalKey → const Map<int, LogicalKeyboardKey>: Maps Windows KeyboardEvent codes to the matching LogicalKeyboardKey.
kWindowsToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps Windows KeyboardEvent codes to the matching PhysicalKeyboardKey.
kWindowTouchSlop → const double: The margin around a dialog, popup menu, or other window-like widget inside which we do not consider a tap to dismiss the widget. (Not currently used.)
kZoomControlsTimeout → const Duration: The time for which zoom controls (e.g. in a map interface) are to be displayed on the screen, from the moment they were last requested.
latin1 → const Latin1Codec: An instance of the default implementation of the Latin1Codec.
ln10 → const double: Natural logarithm of 10.
ln2 → const double: Natural logarithm of 2.
log10e → const double: Base-10 logarithm of e.
log2e → const double: Base-2 logarithm of e.
mustBeConst → const Object: Annotation on a parameter whose arguments must be constants.
mustCallSuper → const Object: Annotation on instance member that overriding members must call.
nonVirtual → const Object: Annotation on instance member that must not be overridden.
optionalTypeArgs → const Object: Annotation on type arguments that can safely be omitted.
pi → const double: The PI constant.
polarRadius → const double: Polar radius in meter (WGS84 ellipsoid)
precisionErrorTolerance → const double: The epsilon of tolerable double precision error.
protected → const Object: Annotation on instance member that should only be used by subclasses.
required → const Required: Annotation on named parameter that should always have an argument supplied.
sqrt1_2 → const double: Square root of 1/2.
sqrt2 → const double: Square root of 2.
standardEasing → const Curve: The standard easing curve in the Material 2 specification.
staticIconProvider → const Object: Annotation for classes that only provide static const IconData instances.
systemEncoding → const SystemEncoding: The current system encoding.
uBooleanInlineAttrs → const List<UInlineAttr>: The attributes that behave as on/off toggles (no payload).
uDocBlockSize → const int: Internal: read block size.
uDocImageCacheBytes → const int: Internal: image cache size.
uDocMaxAllocation → const int: Internal: safety limit for one allocation.
uDocMaxArrayLength → const int: Internal: safety limit for arrays.
uDocMaxDepth → const int: Internal: safety limit for nesting.
uDocMaxStringLength → const int: Internal: safety limit for strings.
uDocNetworkTimeout → const Duration: Internal: network timeout for remote documents.
uDocObjectCacheBytes → const int: Internal: object cache size.
uDocPictureCacheBytes → const int: Internal: page picture cache size.
uDocSourceCacheBytes → const int: Internal: source cache size.
uDocTextIndexFlushPages → const int: Internal: text index batch size.
uDocThumbnailCacheBytes → const int: Internal: thumbnail cache size.
uMaxTagAllocation → const int: Internal: safety limit for tag parsing.
unicodeBomCharacterRune → const int: The Unicode Byte Order Marker (BOM) character U+FEFF.
unicodeReplacementCharacterRune → const int: The Unicode Replacement character U+FFFD (�).
uPlateLetters → const List<String>: Letters used on Iranian car plates.
uSpeedPresets → const List<double>: Playback speeds offered in the speed menu.
utf8 → const Utf8Codec: An instance of the default implementation of the Utf8Codec.
vg → const VectorGraphicUtilities: The VectorGraphicUtilities instance.
visibleForOverriding → const Object: Annotation on declaration that should not be used outside of its package.
visibleForTesting → const Object: Annotation on a public declaration that should only be used in tests.
widgetFactory → const _WidgetFactory: Annotation which marks a function as a widget factory for the purpose of widget creation tracking.
zlib → const ZLibCodec: An instance of the default implementation of the ZLibCodec.

Properties

activeDevToolsServerAddress ↔ String?: The address for the active DevTools server used for debugging this application.
getter/setter pair
connectedVmServiceUri ↔ String?: The uri for the connected vm service protocol.
getter/setter pair
dashedTextConfiguration → TextTreeConfiguration: Identical to sparseTextConfiguration except that the lines connecting parent to children are dashed.
final
debugBrightnessOverride ↔ Brightness?: A setting that can be used to override the platform Brightness exposed from BindingBase.platformDispatcher.
getter/setter pair
debugCaptureShaderWarmUpImage ↔ ShaderWarmUpImageCallback: Called by ShaderWarmUp.execute immediately after it creates an Image.
getter/setter pair
debugCaptureShaderWarmUpPicture ↔ ShaderWarmUpPictureCallback: Called by ShaderWarmUp.execute immediately after it creates a Picture.
getter/setter pair
debugCheckIntrinsicSizes ↔ bool: Check the intrinsic sizes of each RenderBox during layout.
getter/setter pair
debugCurrentRepaintColor ↔ HSVColor: The current color to overlay when repainting a layer.
getter/setter pair
debugDefaultTargetPlatformOverride ↔ TargetPlatform?: Override the defaultTargetPlatform in debug builds.
getter/setter pair
debugDisableClipLayers ↔ bool: Setting to true will cause all clipping effects from the layer tree to be ignored.
getter/setter pair
debugDisableOpacityLayers ↔ bool: Setting to true will cause all opacity effects from the layer tree to be ignored.
getter/setter pair
debugDisablePhysicalShapeLayers ↔ bool: Setting to true will cause all physical modeling effects from the layer tree, such as shadows from elevations, to be ignored.
getter/setter pair
debugDisableShadows ↔ bool: Whether to replace all shadows with solid color blocks.
getter/setter pair
debugDoublePrecision ↔ int?: Configure debugFormatDouble using num.toStringAsPrecision.
getter/setter pair
debugEnhanceBuildTimelineArguments ↔ bool: Adds debugging information to Timeline events related to Widget builds.
getter/setter pair
debugEnhanceLayoutTimelineArguments ↔ bool: Adds debugging information to Timeline events related to RenderObject layouts.
getter/setter pair
debugEnhancePaintTimelineArguments ↔ bool: Adds debugging information to Timeline events related to RenderObject paints.
getter/setter pair
debugFocusChanges ↔ bool: Setting to true will cause extensive logging to occur when focus changes occur.
getter/setter pair
debugHighlightDeprecatedWidgets ↔ bool: Show banners for deprecated widgets.
getter/setter pair
debugImageOverheadAllowance ↔ int: The number of bytes an image must use before it triggers inversion when debugInvertOversizedImages is true.
getter/setter pair
debugInstrumentationEnabled ↔ bool: Boolean value indicating whether debugInstrumentAction will instrument actions in debug builds.
getter/setter pair
debugInvertOversizedImages ↔ bool: If true, the framework will color invert and horizontally flip images that have been decoded to a size taking at least debugImageOverheadAllowance bytes more than necessary.
getter/setter pair
debugKeyEventSimulatorTransitModeOverride ↔ KeyDataTransitMode?: Override the transit mode with which key events are simulated.
getter/setter pair
debugNetworkImageHttpClientProvider ↔ HttpClientProvider?: Provider from which NetworkImage will get its HttpClient in debug builds.
getter/setter pair
debugOnPaintImage ↔ PaintImageCallback?: If not null, called when the framework is about to paint an Image to a Canvas with an ImageSizeInfo that contains the decoded size of the image as well as its output size.
getter/setter pair
debugOnProfilePaint ↔ ProfilePaintCallback?: Callback invoked for every RenderObject painted each frame.
getter/setter pair
debugOnRebuildDirtyWidget ↔ RebuildDirtyWidgetCallback?: Callback invoked for every dirty widget built each frame.
getter/setter pair
debugPaintBaselinesEnabled ↔ bool: Causes each RenderBox to paint a line at each of its baselines.
getter/setter pair
debugPaintFocusBoxes ↔ bool: Causes each Focus widget to paint a box around its bounds.
getter/setter pair
debugPaintLayerBordersEnabled ↔ bool: Causes each Layer to paint a box around its bounds.
getter/setter pair
debugPaintPointersEnabled ↔ bool: Causes objects like RenderPointerListener to flash while they are being tapped. This can be useful to see how large the hit box is, e.g. when debugging buttons that are harder to hit than expected.
getter/setter pair
debugPaintSizeEnabled ↔ bool: Causes each RenderBox to paint a box around its bounds, and some extra boxes, such as RenderPadding, to draw construction lines.
getter/setter pair
debugPaintTextLayoutBoxes ↔ bool: Causes each RenderParagraph to paint the layout boxes of its text.
getter/setter pair
debugPrint ↔ DebugPrintCallback: Prints a message to the console, which you can access using the "flutter" tool's "logs" command ("flutter logs").
getter/setter pair
debugPrintBuildScope ↔ bool: Log all calls to BuildOwner.buildScope.
getter/setter pair
debugPrintDone → Future<void>: A Future that resolves when there is no longer any buffered content being printed by debugPrintThrottled (which is the default implementation for debugPrint, which is used to report errors to the console).
no setter
debugPrintGestureArenaDiagnostics ↔ bool: Prints information about gesture recognizers and gesture arenas.
getter/setter pair
debugPrintGlobalKeyedWidgetLifecycle ↔ bool: Log when widgets with global keys are deactivated and log when they are reactivated (retaken).
getter/setter pair
debugPrintHitTestResults ↔ bool: Whether to print the results of each hit test to the console.
getter/setter pair
debugPrintKeyboardEvents ↔ bool: Setting to true will cause extensive logging to occur when key events are received.
getter/setter pair
debugPrintLayouts ↔ bool: Log the dirty render objects that are laid out each frame.
getter/setter pair
debugPrintMarkNeedsLayoutStacks ↔ bool: Log the call stacks that mark render objects as needing layout.
getter/setter pair
debugPrintMarkNeedsPaintStacks ↔ bool: Log the call stacks that mark render objects as needing paint.
getter/setter pair
debugPrintMouseHoverEvents ↔ bool: Whether to print the details of each mouse hover event to the console.
getter/setter pair
debugPrintRebuildDirtyWidgets ↔ bool: Log the dirty widgets that are built each frame.
getter/setter pair
debugPrintRecognizerCallbacksTrace ↔ bool: Logs a message every time a gesture recognizer callback is invoked.
getter/setter pair
debugPrintResamplingMargin ↔ bool: Whether to print the resampling margin to the console.
getter/setter pair
debugPrintScheduleBuildForStacks ↔ bool: Log the call stacks that mark widgets as needing to be rebuilt.
getter/setter pair
debugProfileBuildsEnabled ↔ bool: Adds Timeline events for every Widget built.
getter/setter pair
debugProfileBuildsEnabledUserWidgets ↔ bool: Adds Timeline events for every user-created Widget built.
getter/setter pair
debugProfileLayoutsEnabled ↔ bool: Adds Timeline events for every RenderObject layout.
getter/setter pair
debugProfilePaintsEnabled ↔ bool: Adds Timeline events for every RenderObject painted.
getter/setter pair
debugProfilePlatformChannels ↔ bool: Controls whether platform channel usage can be debugged in non-release mode.
getter/setter pair
debugRepaintRainbowEnabled ↔ bool: Overlay a rotating set of colors when repainting layers in debug mode.
getter/setter pair
debugRepaintTextRainbowEnabled ↔ bool: Overlay a rotating set of colors when repainting text in debug mode.
getter/setter pair
debugSemanticsDisableAnimations ↔ bool?: Overrides the setting of SemanticsBinding.disableAnimations for debugging and testing.
getter/setter pair
defaultTargetPlatform → TargetPlatform: The TargetPlatform that matches the platform on which the framework is currently executing.
no setter
denseTextConfiguration → TextTreeConfiguration: Dense text tree configuration that minimizes horizontal whitespace.
final
desktopTextSelectionControls → TextSelectionControls: Desktop text selection controls that loosely follow Material design conventions.
final
desktopTextSelectionHandleControls → TextSelectionControls: Desktop text selection handle controls that loosely follow Material design conventions.
final
disablePathProviderPlatformOverride ← bool: no getter
emptyTextSelectionControls → TextSelectionControls: Text selection controls that do not show any toolbars or handles.
final
errorPropertyTextConfiguration → TextTreeConfiguration: Render the name on a line followed by the body and properties on the next line omitting the children.
final
errorTextConfiguration → TextTreeConfiguration: Configuration that draws a box around a node ignoring the connection to the parents.
final
exitCode ↔ int: Get the global exit code for the Dart VM.
getter/setter pair
flatTextConfiguration → TextTreeConfiguration: Whitespace only configuration where children are not indented.
final
imageCache → ImageCache: The singleton that implements the Flutter framework's image cache.
no setter
isCanvasKit → bool: Returns true if the application is using CanvasKit.
no setter
isSkiaWeb → bool: Returns true if the application is using CanvasKit or Skwasm.
no setter
isSkwasm → bool: Returns true if the application is using Skwasm.
no setter
kCupertinoSupportedLanguages → Set<String>: The set of supported languages, as language code strings.
final
kDefaultIconDarkColor → Color: The default color for ThemeData.iconTheme when ThemeData.brightness is Brightness.light. This color is used in IconButton to detect whether IconTheme.of(context).color is the same as the default color of ThemeData.iconTheme.
final
kDefaultIconLightColor → Color: The default color for ThemeData.iconTheme when ThemeData.brightness is Brightness.dark. This color is used in IconButton to detect whether IconTheme.of(context).color is the same as the default color of ThemeData.iconTheme.
final
kMaterialSupportedLanguages → Set<String>: The set of supported languages, as language code strings.
final
kWidgetsSupportedLanguages → Set<String>: The set of supported languages, as language code strings.
final
materialTextSelectionControls → TextSelectionControls: Text selection controls that follow the Material Design specification.
final
materialTextSelectionHandleControls → TextSelectionControls: Text selection handle controls that follow the Material Design specification.
final
navigatorKey ↔ GlobalKey<NavigatorState>: The app's navigator key; UMaterialApp uses it so UNavigator/UToast/ULoading work without a context.
getter/setter pair
pid → int: Returns the PID of the current process.
no setter
platformViewsRegistry → PlatformViewsRegistry: The PlatformViewsRegistry responsible for generating unique identifiers for platform views.
final
primaryFocus → FocusNode?: Provides convenient access to the current FocusManager.primaryFocus from the WidgetsBinding instance.
no setter
rootBundle → AssetBundle: The AssetBundle from which this application was loaded.
final
shallowTextConfiguration → TextTreeConfiguration: Render a node on multiple lines omitting children.
final
shouldProfilePlatformChannels → bool: Profile and print statistics on Platform Channel usage.
no setter
singleLineTextConfiguration → TextTreeConfiguration: Render a node as a single line omitting children.
final
sparseTextConfiguration → TextTreeConfiguration: Default text tree configuration.
final
stderr → Stdout: The standard output stream of errors written by this program.
no setter
stdin → Stdin: The standard input stream of data read by this program.
no setter
stdout → Stdout: The standard output stream of data written by this program.
no setter
svg → Svg: Instance for Svg's utility methods, which can produce a DrawableRoot or PictureInfo from String or Uint8List.
final
transitionTextConfiguration → TextTreeConfiguration: Configuration that draws a box around a leaf node.
final
whitespaceTextConfiguration → TextTreeConfiguration: Whitespace only configuration where children are consistently indented two spaces.
final

Functions

acos(num x) → double: Converts x to a double and returns its arc cosine in radians.
applyBoxFit(BoxFit fit, Size inputSize, Size outputSize) → FittedSizes: Apply a BoxFit value.
applyGrowthDirectionToAxisDirection(AxisDirection axisDirection, GrowthDirection growthDirection) → AxisDirection: Flips the AxisDirection if the GrowthDirection is GrowthDirection.reverse.
applyGrowthDirectionToScrollDirection(ScrollDirection scrollDirection, GrowthDirection growthDirection) → ScrollDirection: Flips the ScrollDirection if the GrowthDirection is GrowthDirection.reverse.
asin(num x) → double: Converts x to a double and returns its arc sine in radians.
atan(num x) → double: Converts x to a double and returns its arc tangent in radians.
atan2(num a, num b) → double: A variant of atan.
axisDirectionIsReversed(AxisDirection axisDirection) → bool: Returns whether traveling along the given axis direction visits coordinates along that axis in numerically decreasing order.
axisDirectionToAxis(AxisDirection axisDirection) → Axis: Returns the Axis that contains the given AxisDirection.
base64Decode(String source) → Uint8List: Decodes base64 or base64url encoded bytes.
base64Encode(List<int> bytes) → String: Encodes bytes using base64 encoding.
base64UrlEncode(List<int> bytes) → String: Encodes bytes using base64url encoding.
basicLocaleListResolution(List<Locale>? preferredLocales, Iterable<Locale> supportedLocales) → Locale: The default locale resolution algorithm.
binarySearch<T extends Comparable<Object>>(List<T> sortedList, T value) → int: Returns the position of value in the sortedList, if it exists.
buildTextSpanWithSpellCheckSuggestions(TextEditingValue value, bool composingWithinCurrentTextRange, TextStyle? style, TextStyle misspelledTextStyle, SpellCheckResults spellCheckResults) → TextSpan: Builds the TextSpan tree given the current state of the text input and spell check results.
childDragAnchorStrategy(Draggable<Object> draggable, BuildContext context, Offset position) → Offset: Display the feedback anchored at the position of the original child.
clampDouble(double x, double min, double max) → double: Same as num.clamp but optimized for a non-null double.
collectBytes(Stream<List<int>> source) → Future<Uint8List>: Collects an asynchronous sequence of byte lists into a single list of bytes.
collectBytesCancelable(Stream<List<int>> source) → CancelableOperation<Uint8List>: Collects an asynchronous sequence of byte lists into a single list of bytes.
combineKeyEventResults(Iterable<KeyEventResult> results) → KeyEventResult: Combine the results returned by multiple FocusOnKeyCallbacks or FocusOnKeyEventCallbacks.
combineSemanticsInfo(List<InlineSpanSemanticsInformation> infoList) → List<InlineSpanSemanticsInformation>: Combines _semanticsInfo entries where permissible.
compute<M, R>(ComputeCallback<M, R> callback, M message, {String? debugLabel}) → Future<R>: Asynchronously runs the given callback - with the provided message - in the background and completes with the result.
computeHitSlop(PointerDeviceKind kind, DeviceGestureSettings? settings) → double: Determine the appropriate hit slop pixels based on the kind of pointer.
computePanSlop(PointerDeviceKind kind, DeviceGestureSettings? settings) → double: Determine the appropriate pan slop pixels based on the kind of pointer.
computeScaleSlop(PointerDeviceKind kind) → double: Determine the appropriate scale slop pixels based on the kind of pointer.
consolidateHttpClientResponseBytes(HttpClientResponse response, {bool autoUncompress = true, BytesReceivedCallback? onBytesReceived}) → Future<Uint8List>: Efficiently converts the response body of an HttpClientResponse into a Uint8List.
coordinateDebugTileBuilder(BuildContext context, Widget tileWidget, TileImage tile) → Widget: Shows coordinates over Tiles
cos(num radians) → double: Converts radians to a double and returns the cosine of the value.
createLocalImageConfiguration(BuildContext context, {Size? size}) → ImageConfiguration: Creates an ImageConfiguration based on the given BuildContext (and optionally size).
darkModeTileBuilder(BuildContext context, Widget tileWidget, TileImage tile) → Widget: Applies inversion color matrix on Tiles which may simulate Dark mode. darkModeTilesContainerBuilder is better at performance because it applies color matrix on the container instead of on every Tile
darkModeTilesContainerBuilder(BuildContext context, Widget tilesContainer) → Widget: Applies inversion color matrix on Tiles container which may simulate Dark mode.
debugAssertAllFoundationVarsUnset(String reason, {DebugPrintCallback debugPrintOverride = debugPrintThrottled}) → bool: Returns true if none of the foundation library debug variables have been changed.
debugAssertAllGesturesVarsUnset(String reason) → bool: Returns true if none of the gestures library debug variables have been changed.
debugAssertAllPaintingVarsUnset(String reason, {bool debugDisableShadowsOverride = false}) → bool: Returns true if none of the painting library debug variables have been changed.
debugAssertAllRenderVarsUnset(String reason, {bool debugCheckIntrinsicSizesOverride = false}) → bool: Returns true if none of the rendering library debug variables have been changed.
debugAssertAllServicesVarsUnset(String reason) → bool: Returns true if none of the widget library debug variables have been changed.
debugAssertAllWidgetVarsUnset(String reason) → bool: Returns true if none of the widget library debug variables have been changed.
debugCheckCanResolveTextDirection(TextDirection? direction, String target) → bool: Asserts that a given TextDirection is not null.
debugCheckHasBoundedAxis(Axis axis, BoxConstraints constraints) → bool: Returns true if the given Axis is bounded within the given BoxConstraints in both the main and cross axis, throwing an exception otherwise.
debugCheckHasDirectionality(BuildContext context, {String? why, String? hint, String? alternative}) → bool: Asserts that the given context has a Directionality ancestor.
debugCheckHasMaterial(BuildContext context) → bool: Asserts that the given context has a Material ancestor within the closest LookupBoundary.
debugCheckHasMaterialLocalizations(BuildContext context) → bool: Asserts that the given context has a Localizations ancestor that contains a MaterialLocalizations delegate.
debugCheckHasMediaQuery(BuildContext context) → bool: Asserts that the given context has a MediaQuery ancestor.
debugCheckHasOverlay(BuildContext context) → bool: Asserts that the given context has an Overlay ancestor.
debugCheckHasScaffold(BuildContext context) → bool: Asserts that the given context has a Scaffold ancestor.
debugCheckHasScaffoldMessenger(BuildContext context) → bool: Asserts that the given context has a ScaffoldMessenger ancestor.
debugCheckHasTable(BuildContext context) → bool: Asserts that the given context has a Table ancestor.
debugCheckHasWidgetsLocalizations(BuildContext context) → bool: Asserts that the given context has a Localizations ancestor that contains a WidgetsLocalizations delegate.
debugChildrenHaveDuplicateKeys(Widget parent, Iterable<Widget> children, {String? message}) → bool: Asserts if the given child list contains any duplicate non-null keys.
debugDescribeFocusTree() → String: Returns a text representation of the current focus tree, along with the current attributes on each node.
debugDescribeTransform(Matrix4? transform) → List<String>: Returns a list of strings representing the given transform in a format useful for TransformProperty.
debugDumpApp() → void: Print a string representation of the currently running app.
debugDumpFocusTree() → void: Prints a text representation of the current focus tree, along with the current attributes on each node.
debugDumpLayerTree() → void: Prints a textual representation of the layer trees.
debugDumpPipelineOwnerTree() → void: Prints a textual representation of the PipelineOwner tree rooted at RendererBinding.rootPipelineOwner.
debugDumpRenderObjectSemanticsTree() → void: Dumps the render object semantics tree.
debugDumpRenderTree() → void: Prints a textual representation of the render trees.
debugDumpSemanticsTree([DebugSemanticsDumpOrder childOrder = DebugSemanticsDumpOrder.traversalOrder]) → void: Prints a textual representation of the semantics trees.
debugFlushLastFrameImageSizeInfo() → void: Flushes inter-frame tracking of image size information from paintImage.
debugFormatDouble(double? value) → String: Formats a double to have standard formatting.
debugInstrumentAction<T>(String description, Future<T> action()) → Future<T>: Runs the specified action, timing how long the action takes in debug builds when debugInstrumentationEnabled is true.
debugIsLocalCreationLocation(Object object) → bool: Returns if an object is user created.
debugIsSerializableForRestoration(Object? object) → bool: Returns true when the provided object is serializable for state restoration.
debugIsWidgetLocalCreation(Widget widget) → bool: Returns true if a Widget is user created.
debugItemsHaveDuplicateKeys(Iterable<Widget> items) → bool: Asserts if the given list of items contains any duplicate non-null keys.
debugMaybeDispatchCreated(String flutterLibrary, String className, Object object) → bool: If memory allocation tracking is enabled, dispatch Flutter object creation.
debugMaybeDispatchDisposed(Object object) → bool: If memory allocations tracking is enabled, dispatch object disposal.
debugPaintPadding(Canvas canvas, Rect outerRect, Rect? innerRect, {double outlineWidth = 2.0}) → void: Paint a diagram showing the given area as padding.
debugPrintStack({StackTrace? stackTrace, String? label, int? maxFrames}) → void: Dump the stack to the console using debugPrint and FlutterError.defaultStackFilter.
debugPrintSynchronously(String? message, {int? wrapWidth}) → void: Alternative implementation of debugPrint that does not throttle.
debugPrintThrottled(String? message, {int? wrapWidth}) → void: Implementation of debugPrint that throttles messages.
debugResetSemanticsIdCounter() → void: In tests use this function to reset the counter used to generate SemanticsNode.id.
debugTransformDebugCreator(Iterable<DiagnosticsNode> properties) → Iterable<DiagnosticsNode>: Transformer to parse and gather information about DiagnosticsDebugCreator.
debugWidgetBuilderValue(Widget widget, Widget? built) → void: Asserts that the built widget is not null.
debugWordWrap(String message, int width, {String wrapIndent = ''}) → Iterable<String>: Wraps the given string at the given width.
decimal2sexagesimal(double dec) → String: Converts a decimal coordinate value to sexagesimal format
decodeImageFromList(Uint8List bytes) → Future<Image>: Creates an image from a list of bytes.
defaultScrollNotificationPredicate(ScrollNotification notification) → bool: A ScrollNotificationPredicate that checks whether notification.depth == 0, which means that the notification did not bubble through any intervening scrolling widgets.
degToRadian(double deg) → double: Converts degree to radian
delay(int milliseconds, VoidCallback action) → Future<void>: Runs action after milliseconds. delay(500, () => print("later"))
delete(Uri url, {Map<String, String>? headers, Object? body, Encoding? encoding}) → Future<Response>: Sends an HTTP DELETE request with the given headers to the given URL.
describeEnum(Object enumEntry) → String: Returns a short description of an enum value.
describeIdentity(Object? object) → String: Returns a summary of the runtime type and hash code of object.
exit(int code) → Never: Exit the Dart VM process immediately with the given exit code.
exp(num x) → double: Converts x to a double and returns the natural exponent, e, to the power x.
flipAxis(Axis direction) → Axis: Returns the opposite of the given Axis.
flipAxisDirection(AxisDirection axisDirection) → AxisDirection: Returns the opposite of the given AxisDirection.
flipScrollDirection(ScrollDirection direction) → ScrollDirection: Returns the opposite of the given ScrollDirection.
get(Uri url, {Map<String, String>? headers}) → Future<Response>: Sends an HTTP GET request with the given headers to the given URL.
getApplicationCacheDirectory() → Future<Directory>: Path to a directory where the application may place application-specific cache files.
getApplicationDocumentsDirectory() → Future<Directory>: Path to a directory where the application may place data that is user-generated, or that cannot otherwise be recreated by your application.
getApplicationSupportDirectory() → Future<Directory>: Path to a directory where the application may place application support files.
getAxisDirectionFromAxisReverseAndDirectionality(BuildContext context, Axis axis, bool reverse) → AxisDirection: Returns the AxisDirection in the given Axis in the current Directionality (or the reverse if reverse is true).
getCupertinoTranslation(Locale locale, DateFormat fullYearFormat, DateFormat dayFormat, DateFormat weekdayFormat, DateFormat mediumDateFormat, DateFormat singleDigitHourFormat, DateFormat singleDigitMinuteFormat, DateFormat doubleDigitMinuteFormat, DateFormat singleDigitSecondFormat, NumberFormat decimalFormat) → GlobalCupertinoLocalizations?: Creates a GlobalCupertinoLocalizations instance for the given locale.
getDownloadsDirectory() → Future<Directory?>: Path to the directory where downloaded files can be stored.
getExternalCacheDirectories() → Future<List<Directory>?>: Paths to directories where application specific cache data can be stored externally.
getExternalStorageDirectories({StorageDirectory? type}) → Future<List<Directory>?>: Paths to directories where application specific data can be stored externally.
getExternalStorageDirectory() → Future<Directory?>: Path to a directory where the application may access top level storage.
getLibraryDirectory() → Future<Directory>: Path to the directory where application can store files that are persistent, backed up, and not visible to the user, such as sqlite.db.
getMaterialTranslation(Locale locale, DateFormat fullYearFormat, DateFormat compactDateFormat, DateFormat shortDateFormat, DateFormat mediumDateFormat, DateFormat longDateFormat, DateFormat yearMonthFormat, DateFormat shortMonthDayFormat, NumberFormat decimalFormat, NumberFormat twoDigitZeroPaddedFormat) → GlobalMaterialLocalizations?: Creates a GlobalMaterialLocalizations instance for the given locale.
getTemporaryDirectory() → Future<Directory>: Path to the temporary directory on the device that is not backed up and is suitable for storing caches of downloaded files.
getWidgetsTranslation(Locale locale) → GlobalWidgetsLocalizations?: Creates a GlobalWidgetsLocalizations instance for the given locale.
head(Uri url, {Map<String, String>? headers}) → Future<Response>: Sends an HTTP HEAD request with the given headers to the given URL.
hourFormat({required TimeOfDayFormat of}) → HourFormat: The HourFormat used for the given TimeOfDayFormat.
initU({String? baseUrl, String? apiKey, String defaultPhoneCountryCode = "IR", int snackBarDuration = 4, ULoadingSettings loadingSettings = const ULoadingSettings(blurAmount: 1, overlayColor: Colors.black12), List<DeviceOrientation> deviceOrientations = const <DeviceOrientation>[DeviceOrientation.portraitUp, DeviceOrientation.portraitDown]}) → Future<void>: Starts u (storage, device/app/network info, notifications, loading overlay, web updates); locks portrait unless you pass deviceOrientations. Call once before runApp. await initU(baseUrl: "https://api.x.com");
intentForMacOSSelector(String selectorName) → Intent?: Maps the selector from NSStandardKeyBindingResponding to the Intent if the selector is recognized.
isSingleButton(int buttons) → bool: Returns whether buttons contains one and only one button.
jsonDecode(String source, {Object? reviver(Object? key, Object? value)?}) → dynamic: Parses the string and returns the resulting Json object.
jsonEncode(Object? object, {Object? toEncodable(Object? nonEncodable)?}) → String: Converts object to a JSON string.
lerpDuration(Duration a, Duration b, double t) → Duration: Linearly interpolate between two Durations.
lerpFontVariations(List<FontVariation>? a, List<FontVariation>? b, double t) → List<FontVariation>?: Interpolate between two lists of FontVariation objects.
listEquals<T>(List<T>? a, List<T>? b) → bool: Compares two lists for element-by-element equality.
loadingTimeDebugTileBuilder(BuildContext context, Widget tileWidget, TileImage tile) → Widget: Shows the Tile loading time in ms
log(num x) → double: Converts x to a double and returns the natural logarithm of the value.
lookupAppLocalizations(Locale locale) → AppLocalizations
mapEquals<T, U>(Map<T, U>? a, Map<T, U>? b) → bool: Compares two maps for element-by-element equality.
max<T extends num>(T a, T b) → T: Returns the larger of two numbers.
mergeSort<T>(List<T> list, {int start = 0, int? end, int compare(T, T)?}) → void: Sorts a list between start (inclusive) and end (exclusive) using the merge sort algorithm.
min<T extends num>(T a, T b) → T: Returns the lesser of two numbers.
normalizeBearing(double bearing) → double: Convert a bearing to be within the 0 to +360 degrees range. Compass bearing is in the rangen 0° ... 360°
nthMouseButton(int number) → int: The bit of PointerEvent.buttons that corresponds to the nth mouse button.
nthStylusButton(int number) → int: The bit of PointerEvent.buttons that corresponds to the nth stylus button.
objectRuntimeType(Object? object, String optimizedValue) → String: Framework code should use this method in favor of calling toString on Object.runtimeType.
paintBorder(Canvas canvas, Rect rect, {BorderSide top = BorderSide.none, BorderSide right = BorderSide.none, BorderSide bottom = BorderSide.none, BorderSide left = BorderSide.none}) → void: Paints a border around the given rectangle on the canvas.
paintImage({required Canvas canvas, required Rect rect, required Image image, String? debugImageLabel, double scale = 1.0, double opacity = 1.0, ColorFilter? colorFilter, BoxFit? fit, Alignment alignment = Alignment.center, Rect? centerSlice, ImageRepeat repeat = ImageRepeat.noRepeat, bool flipHorizontally = false, bool invertColors = false, FilterQuality filterQuality = FilterQuality.medium, bool isAntiAlias = false, BlendMode blendMode = BlendMode.srcOver}) → void: Paints an image into the given rectangle on the canvas.
paintZigZag(Canvas canvas, Paint paint, Offset start, Offset end, int zigs, double width) → void: Draw a line between two points, which cuts diagonally back and forth across the line that connects the two points.
patch(Uri url, {Map<String, String>? headers, Object? body, Encoding? encoding}) → Future<Response>: Sends an HTTP PATCH request with the given headers and body to the given URL.
pointerDragAnchorStrategy(Draggable<Object> draggable, BuildContext context, Offset position) → Offset: Display the feedback anchored at the position of the touch that started the drag.
positionDependentBox({required Size size, required Size childSize, required Offset target, required bool preferBelow, double verticalOffset = 0.0, double margin = 10.0}) → Offset: Position a child box within a container box, either above or below a target point.
post(Uri url, {Map<String, String>? headers, Object? body, Encoding? encoding}) → Future<Response>: Sends an HTTP POST request with the given headers and body to the given URL.
pow(num x, num exponent) → num: Returns x to the power of exponent.
precacheImage(ImageProvider<Object> provider, BuildContext context, {Size? size, ImageErrorListener? onError}) → Future<void>: Prefetches an image into the image cache.
put(Uri url, {Map<String, String>? headers, Object? body, Encoding? encoding}) → Future<Response>: Sends an HTTP PUT request with the given headers and body to the given URL.
radians(num deg) → num: Degrees → radians. radians(90)
radianToDeg(double rad) → double: Radian to degree
read(Uri url, {Map<String, String>? headers}) → Future<String>: Sends an HTTP GET request with the given headers to the given URL and returns a Future that completes to the body of the response as a String.
readBytes(Uri url, {Map<String, String>? headers}) → Future<Uint8List>: Sends an HTTP GET request with the given headers to the given URL and returns a Future that completes to the body of the response as a list of bytes.
round(double value, {int decimals = 6}) → double: Rounds value to given number of decimals
runApp(Widget app) → void: Inflate the given widget and attach it to the view.
runeToLowerCase(int rune) → int: Convert a UTF32 rune to its lower case.
runUAdminApp(UAdminConfig config) → Future<void>
runWidget(Widget app) → void: Inflate the given widget and bootstrap the widget tree.
runWithClient<R>(R body(), Client clientFactory(), {ZoneSpecification? zoneSpecification}) → R: Runs body in its own Zone with the Client returned by clientFactory set as the default Client.
runZoned<R>(R body(), {Map<Object?, Object?>? zoneValues, ZoneSpecification? zoneSpecification, Function? onError}) → R: Runs body in its own zone.
runZonedGuarded<R>(R body(), void onError(Object error, StackTrace stack), {Map<Object?, Object?>? zoneValues, ZoneSpecification? zoneSpecification}) → R?: Runs body in its own error zone.
scheduleMicrotask(void callback()) → void: Runs a function asynchronously.
setEquals<T>(Set<T>? a, Set<T>? b) → bool: Compares two sets for element-by-element equality.
sexagesimal2decimal(String str) → double: Converts a string coordinate value in sexagesimal format to decimal
shortHash(Object? object) → String: Returns a 5 character long hexadecimal string generated from Object.hashCode's 20 least-significant bits.
showAboutDialog({required BuildContext context, String? applicationName, String? applicationVersion, Widget? applicationIcon, String? applicationLegalese, List<Widget>? children, bool barrierDismissible = true, Color? barrierColor, String? barrierLabel, bool useRootNavigator = true, RouteSettings? routeSettings, Offset? anchorPoint}) → void: Displays an AboutDialog, which describes the application and provides a button to show licenses for software used by the application.
showAdaptiveAboutDialog({required BuildContext context, String? applicationName, String? applicationVersion, Widget? applicationIcon, String? applicationLegalese, List<Widget>? children, bool barrierDismissible = true, Color? barrierColor, String? barrierLabel, bool useRootNavigator = true, RouteSettings? routeSettings, Offset? anchorPoint}) → void: Displays either a Material or Cupertino AboutDialog depending on platform, which describes the application and provides a button to show licenses for software used by the application.
showAdaptiveDialog<T>({required BuildContext context, required WidgetBuilder builder, bool? barrierDismissible, Color? barrierColor, String? barrierLabel, bool useSafeArea = true, bool useRootNavigator = true, RouteSettings? routeSettings, Offset? anchorPoint, TraversalEdgeBehavior? traversalEdgeBehavior, bool? requestFocus, AnimationStyle? animationStyle}) → Future<T?>: Displays either a Material or Cupertino dialog depending on platform.
showBottomSheet({required BuildContext context, required WidgetBuilder builder, Color? backgroundColor, double? elevation, ShapeBorder? shape, Clip? clipBehavior, BoxConstraints? constraints, bool? enableDrag, bool? showDragHandle, AnimationController? transitionAnimationController, AnimationStyle? sheetAnimationStyle}) → PersistentBottomSheetController: Shows a Material Design bottom sheet in the nearest Scaffold ancestor. To show a persistent bottom sheet, use the Scaffold.bottomSheet.
showDatePicker({required BuildContext context, DateTime? initialDate, required DateTime firstDate, required DateTime lastDate, DateTime? currentDate, DatePickerEntryMode initialEntryMode = DatePickerEntryMode.calendar, SelectableDayPredicate? selectableDayPredicate, String? helpText, String? cancelText, String? confirmText, Locale? locale, bool barrierDismissible = true, Color? barrierColor, String? barrierLabel, bool useRootNavigator = true, RouteSettings? routeSettings, TextDirection? textDirection, TransitionBuilder? builder, DatePickerMode initialDatePickerMode = DatePickerMode.day, String? errorFormatText, String? errorInvalidText, String? fieldHintText, String? fieldLabelText, TextInputType? keyboardType, Offset? anchorPoint, ValueChanged<DatePickerEntryMode>? onDatePickerModeChange, Icon? switchToInputEntryModeIcon, Icon? switchToCalendarEntryModeIcon, CalendarDelegate<DateTime> calendarDelegate = const GregorianCalendarDelegate()}) → Future<DateTime?>: Shows a dialog containing a Material Design date picker.
showDateRangePicker({required BuildContext context, DateTimeRange<DateTime>? initialDateRange, required DateTime firstDate, required DateTime lastDate, DateTime? currentDate, DatePickerEntryMode initialEntryMode = DatePickerEntryMode.calendar, String? helpText, String? cancelText, String? confirmText, String? saveText, String? errorFormatText, String? errorInvalidText, String? errorInvalidRangeText, String? fieldStartHintText, String? fieldEndHintText, String? fieldStartLabelText, String? fieldEndLabelText, Locale? locale, bool barrierDismissible = true, Color? barrierColor, String? barrierLabel, bool useRootNavigator = true, RouteSettings? routeSettings, TextDirection? textDirection, TransitionBuilder? builder, Offset? anchorPoint, TextInputType keyboardType = TextInputType.datetime, Icon? switchToInputEntryModeIcon, Icon? switchToCalendarEntryModeIcon, SelectableDayForRangePredicate? selectableDayPredicate, CalendarDelegate<DateTime> calendarDelegate = const GregorianCalendarDelegate()}) → Future<DateTimeRange<DateTime>?>: Shows a full screen modal dialog containing a Material Design date range picker.
showDialog<T>({required BuildContext context, required WidgetBuilder builder, bool barrierDismissible = true, Color? barrierColor, String? barrierLabel, bool useSafeArea = true, bool useRootNavigator = true, RouteSettings? routeSettings, Offset? anchorPoint, TraversalEdgeBehavior? traversalEdgeBehavior, bool fullscreenDialog = false, bool? requestFocus, AnimationStyle? animationStyle}) → Future<T?>: Displays a Material dialog above the current contents of the app, with Material entrance and exit animations, modal barrier color, and modal barrier behavior (dialog is dismissible with a tap on the barrier).
showGeneralDialog<T extends Object?>({required BuildContext context, required RoutePageBuilder pageBuilder, bool barrierDismissible = false, String? barrierLabel, Color barrierColor = const Color(0x80000000), Duration transitionDuration = const Duration(milliseconds: 200), RouteTransitionsBuilder? transitionBuilder, bool useRootNavigator = true, bool fullscreenDialog = false, RouteSettings? routeSettings, Offset? anchorPoint, bool? requestFocus}) → Future<T?>: Displays a dialog above the current contents of the app.
showLicensePage({required BuildContext context, String? applicationName, String? applicationVersion, Widget? applicationIcon, String? applicationLegalese, bool useRootNavigator = false}) → void: Displays a LicensePage, which shows licenses for software used by the application.
showMenu<T>({required BuildContext context, RelativeRect? position, PopupMenuPositionBuilder? positionBuilder, required List<PopupMenuEntry<T>> items, T? initialValue, double? elevation, Color? shadowColor, Color? surfaceTintColor, String? semanticLabel, ShapeBorder? shape, EdgeInsetsGeometry? menuPadding, Color? color, bool useRootNavigator = false, BoxConstraints? constraints, Clip clipBehavior = Clip.none, RouteSettings? routeSettings, AnimationStyle? popUpAnimationStyle, bool? requestFocus}) → Future<T?>: Shows a popup menu that contains the items at position.
showModalBottomSheet<T>({required BuildContext context, required WidgetBuilder builder, Color? backgroundColor, String? barrierLabel, double? elevation, ShapeBorder? shape, Clip? clipBehavior, BoxConstraints? constraints, Color? barrierColor, bool isScrollControlled = false, double scrollControlDisabledMaxHeightRatio = _kDefaultScrollControlDisabledMaxHeightRatio, bool useRootNavigator = false, bool isDismissible = true, bool enableDrag = true, bool? showDragHandle, bool useSafeArea = false, RouteSettings? routeSettings, AnimationController? transitionAnimationController, Offset? anchorPoint, AnimationStyle? sheetAnimationStyle, bool? requestFocus}) → Future<T?>: Shows a modal Material Design bottom sheet.
showRawDialog<T>({required BuildContext context, required WidgetBuilder builder, RawDialogRouteBuilder<T>? routeBuilder, bool useRootNavigator = true, RouteSettings? routeSettings, bool fullscreenDialog = false}) → Future<T?>: Displays a dialog over the contents of the app.
showSearch<T>({required BuildContext context, required SearchDelegate<T> delegate, String? query = '', bool useRootNavigator = false, bool maintainState = false}) → Future<T?>: Shows a full screen search page and returns the search result selected by the user when the page is closed.
showTimePicker({required BuildContext context, required TimeOfDay initialTime, TransitionBuilder? builder, bool barrierDismissible = true, Color? barrierColor, String? barrierLabel, bool useRootNavigator = true, TimePickerEntryMode initialEntryMode = TimePickerEntryMode.dial, String? cancelText, String? confirmText, String? helpText, String? errorInvalidText, String? hourLabelText, String? minuteLabelText, RouteSettings? routeSettings, EntryModeChangeCallback? onEntryModeChanged, Offset? anchorPoint, Orientation? orientation, Icon? switchToInputEntryModeIcon, Icon? switchToTimerEntryModeIcon, bool emptyInitialInput = false}) → Future<TimeOfDay?>: Shows a dialog containing a Material Design time picker.
sin(num radians) → double: Converts radians to a double and returns the sine of the value.
sleep(Duration duration) → void: Sleep for the duration specified in duration.
smallestButton(int buttons) → int: Returns the button of buttons with the smallest integer.
sqrt(num x) → double: Converts x to a double and returns the positive square root of the value.
stdioType(dynamic object) → StdioType: Whether a stream is attached to a file, pipe, terminal, or something else.
subscriptionTransformer<T>({Future handleCancel(StreamSubscription<T>)?, void handlePause(StreamSubscription<T>)?, void handleResume(StreamSubscription<T>)?}) → StreamTransformer<T, T>: Creates a StreamTransformer that modifies the behavior of subscriptions to a stream.
tan(num radians) → double: Converts radians to a double and returns the tangent of the value.
textDirectionToAxisDirection(TextDirection textDirection) → AxisDirection: Returns the AxisDirection in which reading occurs in the given TextDirection.
typedStreamTransformer<S, T>(StreamTransformer transformer) → StreamTransformer<S, T>: Creates a wrapper that coerces the type of transformer.
uArFormatDistance(double metres, {UArMeasureUnit unit = UArMeasureUnit.metric}) → String: Metres → "85 m" / "1.2 km" (or feet/miles). uArFormatDistance(1250)
uArTrackingHint(UArValue value, UArLabels labels, {bool needsSurface = true}) → String?: Human wording for the current tracking state, or null when all is well.
uDocShapeKindOf(UDocDrawTool tool) → UDocShapeKind?: Shape kind from its saved name.
uDownloadCategoryIcon(UDownloadCategory category) → IconData: Icon for a download category (video, audio, document…).
uDownloadErrorLabel(UDownloadError? error) → String: Human text for a download error.
uDownloadStatusLabel(UDownloadTask task) → String: Human text for a download's status.
uFormatBytes(int bytes) → String: Bytes → "1.5 MB". uFormatBytes(1536000)
uFormatDuration(Duration value) → String: Duration → "1:02:03" / "02:03". uFormatDuration(95.seconds) → "01:35"
uJoinPath(String a, String b) → String: Joins path segments with "/" and collapses duplicate separators.
unawaited(Future<void>? future) → void: Explicitly ignores a future.
uPdfApply(List<double> m, double x, double y) → Offset: Internal: apply matrix to a point.
uPdfBaseMatrix(Rect box, int rotation, double scale) → List<double>: Internal: page base matrix.
uPdfInvert(List<double> m) → List<double>: Internal: matrix invert.
uPdfMatrix4(List<double> m) → Float64List: Internal: 2D matrix → Matrix4.
uPdfMul(List<double> m, List<double> n) → List<double>: Internal: matrix multiply.
uPdfRectFromArray(List<Object?>? values, {Rect fallback = const Rect.fromLTWH(0, 0, 612, 792)}) → Rect: Internal: PDF array → Rect.
uWrap(Widget child, {BorderRadius? borderRadius, double? radius, GestureTapCallback? onTap, VoidCallback? onPress, GestureTapCallback? onDoubleTap, GestureLongPressCallback? onLongPress, GestureTapDownCallback? onTapDown, GestureTapUpCallback? onTapUp, GestureTapCancelCallback? onTapCancel, GestureTapCallback? onSecondaryTap, HitTestBehavior? hitTestBehavior, bool splash = false, Color? splashColor, Color? highlightColor, Color? hoverColor, double? pressedScale, Duration pressDuration = const Duration(milliseconds: 120), bool enableFeedback = true, MouseCursor? cursor, ValueChanged<bool>? onHover, double? opacity, String? tooltip, String? heroTag, EdgeInsetsGeometry? margin, String? semanticsLabel, bool? semanticsButton, bool visible = true, BoxFit? fit, AlignmentGeometry fitAlignment = Alignment.center, double? scale, double? rotate, Offset? translate, bool center = false, bool safeArea = false, Axis? scrollable, ScrollController? scrollController, TextDirection? textDirection, int? expanded, int? flexible, bool positioned = false, double? left, double? top, double? right, double? bottom, double? positionedWidth, double? positionedHeight}) → Widget: Adds u's box, tap, hover, tooltip, hero, fit, transform and position options to any widget (what every U-widget uses). uWrap(Text("Hi"), onTap: open, tooltip: "Open")
zeroPad(num number) → String: Pads a number with a single zero, if it is less than 10

Typedefs

ActionListenerCallback = void Function(Action<Intent> action): The kind of callback that an Action uses to notify of changes to the action's state.
AllowedButtonsFilter = bool Function(int buttons): Signature for GestureRecognizer.allowedButtonsFilter.
AnimatableCallback<T> = T Function(double value): A typedef used by Animatable.fromCallback to create an Animatable from a callback.
AnimatedCrossFadeBuilder = Widget Function(Widget topChild, Key topChildKey, Widget bottomChild, Key bottomChildKey): Signature for the AnimatedCrossFade.layoutBuilder callback.
AnimatedItemBuilder = Widget Function(BuildContext context, int index, Animation<double> animation): Signature for the builder callback used by AnimatedList, AnimatedList.separated & AnimatedGrid to build their animated children.
AnimatedRemovedItemBuilder = Widget Function(BuildContext context, Animation<double> animation): Signature for the builder callback used in AnimatedListState.removeItem and AnimatedGridState.removeItem to animate their children after they have been removed.
AnimatedSwitcherLayoutBuilder = Widget Function(Widget? currentChild, List<Widget> previousChildren): Signature for builders used to generate custom layouts for AnimatedSwitcher.
AnimatedSwitcherTransitionBuilder = Widget Function(Widget child, Animation<double> animation): Signature for builders used to generate custom transitions for AnimatedSwitcher.
AnimatedTransitionBuilder = Widget Function(BuildContext context, Animation<double> animation, Widget? child): Builder callback used by DualTransitionBuilder.
AnimationStatusListener = void Function(AnimationStatus status): Signature for listeners attached using Animation.addStatusListener.
AppExitRequestCallback = Future<AppExitResponse> Function(): A callback type that is used by AppLifecycleListener.onExitRequested to ask the application if it wants to cancel application termination or not.
AppPrivateCommandCallback = void Function(String action, Map<String, dynamic> data): Signature for the callback that reports the app private command results.
AsyncCallback = Future<void> Function(): Signature of callbacks that have no arguments and return no data, but that return a Future to indicate when their work is complete.
AsyncValueGetter<T> = Future<T> Function(): Signature for callbacks that are to asynchronously report a value on demand.
AsyncValueSetter<T> = Future<void> Function(T value): Signature for callbacks that report that a value has been set and return a Future that completes when the value has been saved.
AsyncWidgetBuilder<T> = Widget Function(BuildContext context, AsyncSnapshot<T> snapshot): Signature for strategies that build widgets based on asynchronous interaction.
AutocompleteFieldViewBuilder = Widget Function(BuildContext context, TextEditingController textEditingController, FocusNode focusNode, VoidCallback onFieldSubmitted): The type of the Autocomplete callback which returns the widget that contains the input TextField or TextFormField.
AutocompleteOnSelected<T extends Object> = void Function(T option): The type of the callback used by the RawAutocomplete widget to indicate that the user has selected an option.
AutocompleteOptionsBuilder<T extends Object> = FutureOr<Iterable<T>> Function(TextEditingValue textEditingValue): The type of the RawAutocomplete callback which computes the list of optional completions for the widget's field, based on the text the user has entered so far.
AutocompleteOptionsViewBuilder<T extends Object> = Widget Function(BuildContext context, AutocompleteOnSelected<T> onSelected, Iterable<T> options): The type of the RawAutocomplete callback which returns a Widget that displays the specified options and calls onSelected if the user selects an option.
AutocompleteOptionToString<T extends Object> = String Function(T option): The type of the RawAutocomplete callback that converts an option value to a string which can be displayed in the widget's options menu.
BadCertificateCallback = bool Function(X509Certificate cr, String host, int port)
BottomSheetDragEndHandler = void Function(DragEndDetails details, {required bool isClosing}): A callback for when the user stops dragging the bottom sheet.
BottomSheetDragStartHandler = void Function(DragStartDetails details): A callback for when the user begins dragging the bottom sheet.
BoxConstraintsTransform = BoxConstraints Function(BoxConstraints constraints): Signature for a function that transforms a BoxConstraints to another BoxConstraints.
BoxHitTest = bool Function(BoxHitTestResult result, Offset position): Method signature for hit testing a RenderBox.
BoxHitTestWithOutOfBandPosition = bool Function(BoxHitTestResult result): Method signature for hit testing a RenderBox with a manually managed position (one that is passed out-of-band).
ButtonLayerBuilder = Widget Function(BuildContext context, Set<WidgetState> states, Widget? child): The type for ButtonStyle.backgroundBuilder and ButtonStyle.foregroundBuilder.
ByteConversionSinkBase = ByteConversionSink: This class provides a base-class for converters that need to accept byte inputs.
BytesReceivedCallback = void Function(int cumulative, int? total): Signature for getting notified when chunks of bytes are received while consolidating the bytes of an HttpClientResponse into a Uint8List.
CachedMapTile = ({Uint8List bytes, CachedMapTileMetadata metadata}): A tile's bytes and metadata returned from MapCachingProvider.getTile
ChildBaselineGetter = double? Function(RenderBox child, BoxConstraints constraints, TextBaseline baseline): Signature for a function that takes a RenderBox and returns the baseline offset this RenderBox would have if it were laid out with the given BoxConstraints.
ChildIndexGetter = int? Function(Key key): Called to find the new index of a child based on its key in case of reordering.
ChildLayouter = Size Function(RenderBox child, BoxConstraints constraints): Signature for a function that takes a RenderBox and returns the Size that the RenderBox would have if it were laid out with the given BoxConstraints.
ChildSemanticsConfigurationsDelegate = ChildSemanticsConfigurationsResult Function(List<SemanticsConfiguration>): Signature for the SemanticsConfiguration.childConfigurationsDelegate.
CompositionCallback = void Function(Layer layer): The signature of the callback added in Layer.addCompositionCallback.
ComputeCallback<M, R> = FutureOr<R> Function(M message): Signature for the callback passed to compute.
ComputeImpl = Future<R> Function<M, R>(ComputeCallback<M, R> callback, M message, {String? debugLabel}): The signature of compute, which spawns an isolate, runs callback on that isolate, passes it message, and (eventually) returns the value returned by callback.
ComputePropertyValueCallback<T> = T? Function(): Signature for computing the value of a property.
ConditionalElementVisitor = bool Function(Element element): Signature for the callback to BuildContext.visitAncestorElements.
ConfirmDismissCallback = Future<bool?> Function(DismissDirection direction): Signature used by Dismissible to give the application an opportunity to confirm or veto a dismiss gesture.
ControllerCallback = void Function(): Type of a stream controller's onListen, onPause and onResume callbacks.
ControllerCancelCallback = FutureOr<void> Function(): Type of stream controller onCancel callbacks.
ControlsWidgetBuilder = Widget Function(BuildContext context, ControlsDetails details): A builder that creates a widget given the two callbacks onStepContinue and onStepCancel.
CreatePeriodicTimerHandler = Timer Function(Zone self, ZoneDelegate parent, Zone zone, Duration period, void f(Timer timer)): The type of a custom Zone.createPeriodicTimer implementation function.
CreatePlatformViewCallback = PlatformViewController Function(PlatformViewCreationParams params): Constructs a PlatformViewController.
CreateRectTween = Tween<Rect?> Function(Rect? begin, Rect? end): Signature for a function that takes two Rect instances and returns a RectTween that transitions between them.
CreateTimerHandler = Timer Function(Zone self, ZoneDelegate parent, Zone zone, Duration duration, void f()): The type of a custom Zone.createTimer implementation function.
DataColumnSortCallback = void Function(int columnIndex, bool ascending): Signature for DataColumn.onSort callback.
DebugPaintCallback = void Function(PaintingContext context, Offset offset, RenderView renderView): A callback for painting a debug overlay on top of the provided RenderView.
DebugPrintCallback = void Function(String? message, {int? wrapWidth}): Signature for debugPrint implementations.
DecoderBufferCallback = Future<Codec> Function(ImmutableBuffer buffer, {bool allowUpscaling, int? cacheHeight, int? cacheWidth}): Performs the decode process for use in ImageProvider.loadBuffer.
DelegatedTransitionBuilder = Widget? Function(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation, bool allowSnapshotting, Widget? child): Signature for a builder used to control a page's exit transition.
DevicePixelRatioGetter = double? Function(int viewId): Signature for a callback that returns the device pixel ratio of a FlutterView identified by the provided viewId.
DiagnosticPropertiesTransformer = Iterable<DiagnosticsNode> Function(Iterable<DiagnosticsNode> properties): Signature for DiagnosticPropertiesBuilder transformer.
DidRemovePageCallback = void Function(Page<Object?> page): Signature for the Navigator.onDidRemovePage callback.
DismissDirectionCallback = void Function(DismissDirection direction): Signature used by Dismissible to indicate that it has been dismissed in the given direction.
DismissUpdateCallback = void Function(DismissUpdateDetails details): Signature used by Dismissible to indicate that the dismissible has been dragged.
DragAnchorStrategy = Offset Function(Draggable<Object> draggable, BuildContext context, Offset position): Signature for the strategy that determines the drag start point of a Draggable.
DragEndCallback = void Function(DraggableDetails details): Signature for when the draggable is dropped.
DraggableCanceledCallback = void Function(Velocity velocity, Offset offset): Signature for when a Draggable is dropped without being accepted by a DragTarget.
DragTargetAccept<T> = void Function(T data): Signature for causing a DragTarget to accept the given data.
DragTargetAcceptWithDetails<T> = void Function(DragTargetDetails<T> details): Signature for determining information about the acceptance by a DragTarget.
DragTargetBuilder<T> = Widget Function(BuildContext context, List<T?> candidateData, List rejectedData): Signature for building children of a DragTarget.
DragTargetLeave<T> = void Function(T? data): Signature for when a Draggable leaves a DragTarget.
DragTargetMove<T> = void Function(DragTargetDetails<T> details): Signature for when a Draggable moves within a DragTarget.
DragTargetWillAccept<T> = bool Function(T? data): Signature for determining whether the given data will be accepted by a DragTarget.
DragTargetWillAcceptWithDetails<T> = bool Function(DragTargetDetails<T> details): Signature for determining whether the given data will be accepted by a DragTarget, based on provided information.
DragUpdateCallback = void Function(DragUpdateDetails details): Signature for when a Draggable is dragged across the screen.
DrawerCallback = void Function(bool isOpened): Signature for the callback that's called when a DrawerController is opened or closed.
DropdownButtonBuilder = List<Widget> Function(BuildContext context): A builder to customize dropdown buttons.
DropdownMenuDecorationBuilder = InputDecoration Function(BuildContext context, MenuController controller): The type of builder function used by DropdownMenu.decorationBuilder to build the InputDecoration passed to the inner text field.
EditableTextContextMenuBuilder = Widget Function(BuildContext context, EditableTextState editableTextState): Signature for a widget builder that builds a context menu for the given EditableTextState.
ElementCreatedCallback = void Function(Object element): The signature of the function that gets called when the HtmlElementView DOM element is created.
ElementVisitor = void Function(Element element): Signature for the callback to BuildContext.visitChildElements.
EntryModeChangeCallback = void Function(TimePickerEntryMode mode): Signature for when the time picker entry mode is changed.
ErrorCallbackHandler = AsyncError? Function(Zone self, ZoneDelegate parent, Zone zone, Object error, StackTrace? stackTrace): The type of a custom Zone.errorCallback implementation function.
ErrorTileCallBack = void Function(TileImage tile, Object error, StackTrace? stackTrace): Callback definition for the TileLayer.errorTileCallback option.
ErrorWidgetBuilder = Widget Function(FlutterErrorDetails details): Signature for the constructor that is called when an error occurs while building a widget.
ExitWidgetSelectionButtonBuilder = Widget Function(BuildContext context, {required GlobalKey<State<StatefulWidget>> key, required VoidCallback onPressed, required String semanticsLabel}): Signature for the builder callback used by WidgetInspector.exitWidgetSelectionButtonBuilder.
ExpansibleBuilder = Widget Function(BuildContext context, Widget header, Widget body, Animation<double> animation): The type of the callback that uses the header and body of an Expansible widget to build the widget.
ExpansibleComponentBuilder = Widget Function(BuildContext context, Animation<double> animation): The type of the callback that returns the header or body of an Expansible.
ExpansionPanelCallback = void Function(int panelIndex, bool isExpanded): Signature for the callback that's called when an ExpansionPanel is expanded or collapsed.
ExpansionPanelHeaderBuilder = Widget Function(BuildContext context, bool isExpanded): Signature for the callback that's called when the header of the ExpansionPanel needs to rebuild.
ExpansionTileController = ExpansibleController: Enables control over a single ExpansionTile's expanded/collapsed state.
FilterCallback<T> = List<DropdownMenuEntry<T>> Function(List<DropdownMenuEntry<T>> entries, String filter): A callback function that returns the list of the items that matches the current applied filter.
FlutterExceptionHandler = void Function(FlutterErrorDetails details): Signature for FlutterError.onError handler.
FocusOnKeyCallback = KeyEventResult Function(FocusNode node, RawKeyEvent event): Signature of a callback used by Focus.onKey and FocusScope.onKey to receive key events.
FocusOnKeyEventCallback = KeyEventResult Function(FocusNode node, KeyEvent event): Signature of a callback used by Focus.onKeyEvent and FocusScope.onKeyEvent to receive key events.
ForkHandler = Zone Function(Zone self, ZoneDelegate parent, Zone zone, ZoneSpecification? specification, Map<Object?, Object?>? zoneValues): The type of a custom Zone.fork implementation function.
FormFieldBuilder<T> = Widget Function(FormFieldState<T> field): Signature for building the widget representing the form field.
FormFieldErrorBuilder = Widget Function(BuildContext context, String errorText): Signature for a callback that builds an error widget.
FormFieldSetter<T> = void Function(T? newValue): Signature for being notified when a form field changes value.
FormFieldValidator<T> = String? Function(T? value): Signature for validating a form field.
GenerateAppTitle = String Function(BuildContext context): The signature of WidgetsApp.onGenerateTitle.
GestureCancelCallback = void Function(): Signature for when the pointer that previously triggered a GestureTapDragDownCallback did not complete.
GestureDoubleTapCallback = void Function(): Signature for callback when the user has tapped the screen at the same location twice in quick succession.
GestureDragCancelCallback = void Function(): Signature for when the pointer that previously triggered a GestureDragDownCallback did not complete.
GestureDragDownCallback = void Function(DragDownDetails details): Signature for when a pointer has contacted the screen and might begin to move.
GestureDragEndCallback = void Function(DragEndDetails details): Signature for when a pointer that was previously in contact with the screen and moving is no longer in contact with the screen.
GestureDragStartCallback = void Function(DragStartDetails details): Signature for when a pointer has contacted the screen and has begun to move.
GestureDragUpdateCallback = void Function(DragUpdateDetails details): Signature for when a pointer that is in contact with the screen and moving has moved again.
GestureForceInterpolation = double Function(double pressureMin, double pressureMax, double pressure): Signature used by ForcePressGestureRecognizer for interpolating the raw device pressure to a value in the range [0, 1] given the device's pressure min and pressure max.
GestureForcePressEndCallback = void Function(ForcePressDetails details): Signature for when the pointer that previously triggered a ForcePressGestureRecognizer.onStart callback is no longer in contact with the screen.
GestureForcePressPeakCallback = void Function(ForcePressDetails details): Signature used by ForcePressGestureRecognizer for when a pointer that has pressed with at least ForcePressGestureRecognizer.peakPressure.
GestureForcePressStartCallback = void Function(ForcePressDetails details): Signature used by a ForcePressGestureRecognizer for when a pointer has pressed with at least ForcePressGestureRecognizer.startPressure.
GestureForcePressUpdateCallback = void Function(ForcePressDetails details): Signature used by ForcePressGestureRecognizer during the frames after the triggering of a ForcePressGestureRecognizer.onStart callback.
GestureLongPressCallback = void Function(): Callback signature for LongPressGestureRecognizer.onLongPress.
GestureLongPressCancelCallback = void Function(): Callback signature for LongPressGestureRecognizer.onLongPressCancel.
GestureLongPressDownCallback = void Function(LongPressDownDetails details): Callback signature for LongPressGestureRecognizer.onLongPressDown.
GestureLongPressEndCallback = void Function(LongPressEndDetails details): Callback signature for LongPressGestureRecognizer.onLongPressEnd.
GestureLongPressMoveUpdateCallback = void Function(LongPressMoveUpdateDetails details): Callback signature for LongPressGestureRecognizer.onLongPressMoveUpdate.
GestureLongPressStartCallback = void Function(LongPressStartDetails details): Callback signature for LongPressGestureRecognizer.onLongPressStart.
GestureLongPressUpCallback = void Function(): Callback signature for LongPressGestureRecognizer.onLongPressUp.
GestureMultiDragStartCallback = Drag? Function(Offset position): Signature for when MultiDragGestureRecognizer recognizes the start of a drag gesture.
GestureMultiTapCallback = void Function(int pointer): Signature used by MultiTapGestureRecognizer for when a tap has occurred.
GestureMultiTapCancelCallback = void Function(int pointer): Signature for when the pointer that previously triggered a GestureMultiTapDownCallback will not end up causing a tap.
GestureMultiTapDownCallback = void Function(int pointer, TapDownDetails details): Signature used by MultiTapGestureRecognizer for when a pointer that might cause a tap has contacted the screen at a particular location.
GestureMultiTapUpCallback = void Function(int pointer, TapUpDetails details): Signature used by MultiTapGestureRecognizer for when a pointer that will trigger a tap has stopped contacting the screen at a particular location.
GestureRecognizerFactoryConstructor<T extends GestureRecognizer> = T Function(): Signature for closures that implement GestureRecognizerFactory.constructor.
GestureRecognizerFactoryInitializer<T extends GestureRecognizer> = void Function(T instance): Signature for closures that implement GestureRecognizerFactory.initializer.
GestureScaleEndCallback = void Function(ScaleEndDetails details): Signature for when the pointers are no longer in contact with the screen.
GestureScaleStartCallback = void Function(ScaleStartDetails details): Signature for when the pointers in contact with the screen have established a focal point and initial scale of 1.0.
GestureScaleUpdateCallback = void Function(ScaleUpdateDetails details): Signature for when the pointers in contact with the screen have indicated a new focal point and/or scale.
GestureSerialTapCancelCallback = void Function(SerialTapCancelDetails details): Signature used by SerialTapGestureRecognizer.onSerialTapCancel for when a pointer that previously triggered a GestureSerialTapDownCallback will not end up completing the serial tap.
GestureSerialTapDownCallback = void Function(SerialTapDownDetails details): Signature used by SerialTapGestureRecognizer.onSerialTapDown for when a pointer that might cause a serial tap has contacted the screen at a particular location.
GestureSerialTapUpCallback = void Function(SerialTapUpDetails details): Signature used by SerialTapGestureRecognizer.onSerialTapUp for when a pointer that will trigger a serial tap has stopped contacting the screen.
GestureTapCallback = void Function(): Signature for when a tap has occurred.
GestureTapCancelCallback = void Function(): Signature for when the pointer that previously triggered a GestureTapDownCallback will not end up causing a tap.
GestureTapDownCallback = void Function(TapDownDetails details): Signature for when a pointer that might cause a tap has contacted the screen.
GestureTapDragDownCallback = void Function(TapDragDownDetails details): Signature for when a pointer that might cause a tap has contacted the screen.
GestureTapDragEndCallback = void Function(TapDragEndDetails endDetails): Signature for when a pointer that was previously in contact with the screen and moving is no longer in contact with the screen.
GestureTapDragStartCallback = void Function(TapDragStartDetails details): Signature for when a pointer has contacted the screen and has begun to move.
GestureTapDragUpCallback = void Function(TapDragUpDetails details): Signature for when a pointer that will trigger a tap has stopped contacting the screen.
GestureTapDragUpdateCallback = void Function(TapDragUpdateDetails details): Signature for when a pointer that is in contact with the screen and moving has moved again.
GestureTapMoveCallback = void Function(TapMoveDetails details): Signature for when a pointer that triggered a tap has moved.
GestureTapUpCallback = void Function(TapUpDetails details): Signature for when a pointer that will trigger a tap has stopped contacting the screen.
GestureVelocityTrackerBuilder = VelocityTracker Function(PointerEvent event): Signature for a function that builds a VelocityTracker.
HandleEventCallback = void Function(PointerEvent event): A callback used by PointerEventResampler.sample and PointerEventResampler.stop to process a resampled event.
HandleUncaughtErrorHandler = void Function(Zone self, ZoneDelegate parent, Zone zone, Object error, StackTrace stackTrace): The type of a custom Zone.handleUncaughtError implementation function.
HeroFlightShuttleBuilder = Widget Function(BuildContext flightContext, Animation<double> animation, HeroFlightDirection flightDirection, BuildContext fromHeroContext, BuildContext toHeroContext): A function that lets Heroes self supply a Widget that is shown during the hero's flight from one route to another instead of default (which is to show the destination route's instance of the Hero).
HeroPlaceholderBuilder = Widget Function(BuildContext context, Size heroSize, Widget child): Signature for a function that builds a Hero placeholder widget given a child and a Size.
HttpClientProvider = HttpClient Function(): Signature for a method that returns an HttpClient.
HttpResponseErrorCallback = void Function(HttpResponseError error): Signature for callbacks that report http errors during loading a page.
ImageChunkListener = void Function(ImageChunkEvent event): Signature for listening to ImageChunkEvent events.
ImageDecoderCallback = Future<Codec> Function(ImmutableBuffer buffer, {TargetImageSizeCallback? getTargetSize}): Performs the decode process for use in ImageProvider.loadImage.
ImageErrorListener = void Function(Object exception, StackTrace? stackTrace): Signature for reporting errors when resolving images.
ImageErrorWidgetBuilder = Widget Function(BuildContext context, Object error, StackTrace? stackTrace): Signature used by Image.errorBuilder to create a replacement widget to render instead of the image.
ImageFrameBuilder = Widget Function(BuildContext context, Widget child, int? frame, bool wasSynchronouslyLoaded): Signature used by Image.frameBuilder to control the widget that will be used when an Image is built.
ImageListener = void Function(ImageInfo image, bool synchronousCall): Signature for callbacks reporting that an image is available.
ImageLoadingBuilder = Widget Function(BuildContext context, Widget child, ImageChunkEvent? loadingProgress): Signature used by Image.loadingBuilder to build a representation of the image's loading progress.
IndexedWidgetBuilder = Widget Function(BuildContext context, int index): Signature for a function that creates a widget for a given index, e.g., in a list.
InformationCollector = Iterable<DiagnosticsNode> Function(): Signature for FlutterErrorDetails.informationCollector callback and other callbacks that collect information describing an error.
InitialRouteListFactory = List<Route> Function(String initialRoute): The signature of WidgetsApp.onGenerateInitialRoutes.
InlineSpanVisitor = bool Function(InlineSpan span): Called on each span as InlineSpan.visitChildren walks the InlineSpan tree.
InputCounterWidgetBuilder = Widget? Function(BuildContext context, {required int currentLength, required bool isFocused, required int? maxLength}): Signature for the TextField.buildCounter callback.
InspectorSelectionChangedCallback = void Function(): Signature for the selection change callback used by WidgetInspectorService.selectionChangedCallback.
InteractiveViewerWidgetBuilder = Widget Function(BuildContext context, Quad viewport): A signature for widget builders that take a Quad of the current viewport.
IsKeyCursorRotationTrigger = bool Function(LogicalKeyboardKey key): See CursorKeyboardRotationOptions.isKeyTrigger
ItemExtentBuilder = double? Function(int index, SliverLayoutDimensions dimensions): Called to get the item extent by the index of item.
IterableFilter<T> = Iterable<T> Function(Iterable<T> input): Signature for callbacks that filter an iterable.
KeyEventCallback = bool Function(KeyEvent event): The signature for HardwareKeyboard.addHandler, a callback to decide whether the entire framework handles a key event.
KeyMessageHandler = bool Function(KeyMessage message): The signature for KeyEventManager.keyMessageHandler.
LatLngFactory = LatLng Function(double latitude, double longitude): Necessary for creating new instances T extends LatLng (Path
LayerHitNotifier<R extends Object> = ValueNotifier<LayerHitResult<R>?>: A ValueNotifier that notifies:
LayoutCallback<T extends Constraints> = void Function(T constraints): Signature for a function that is called during layout.
LayoutWidgetBuilder = Widget Function(BuildContext context, BoxConstraints constraints): The signature of the LayoutBuilder builder function.
LicenseEntryCollector = Stream<LicenseEntry> Function(): Signature for callbacks passed to LicenseRegistry.addLicense.
LocaleListResolutionCallback = Locale? Function(List<Locale>? locales, Iterable<Locale> supportedLocales): The signature of WidgetsApp.localeListResolutionCallback.
LocaleResolutionCallback = Locale? Function(Locale? locale, Iterable<Locale> supportedLocales): The signature of WidgetsApp.localeResolutionCallback.
LongPressCallback = void Function(TapPosition tapPosition, LatLng point): Callback to notify when the map emits long-press gesture
LottieDecoder = Future<LottieComposition?> Function(List<int> bytes): A function that knows how to transform a list of bytes to a LottieComposition
LottieImageProviderFactory = ImageProvider<Object>? Function(LottieImageAsset)
MagnifierBuilder = Widget? Function(BuildContext context, MagnifierController controller, ValueNotifier<MagnifierInfo> magnifierInfo): Signature for a builder that builds a Widget with a MagnifierController.
MapEventCallback = void Function(MapEvent): Callback to notify when the map emits a MapEvent.
MaterialPropertyResolver<T> = WidgetPropertyResolver<T>: Signature for the function that returns a value of type T based on a given set of states.
MaterialState = WidgetState: Interactive states that some of the Material widgets can take on when receiving input from the user.
MaterialStateBorderSide = WidgetStateBorderSide: Defines a BorderSide whose value depends on a set of MaterialStates which represent the interactive state of a component.
MaterialStateColor = WidgetStateColor: Defines a Color that is also a MaterialStateProperty.
MaterialStateMouseCursor = WidgetStateMouseCursor: Defines a MouseCursor whose value depends on a set of MaterialStates which represent the interactive state of a component.
MaterialStateOutlinedBorder = WidgetStateOutlinedBorder: Defines an OutlinedBorder whose value depends on a set of MaterialStates which represent the interactive state of a component.
MaterialStateProperty<T> = WidgetStateProperty<T>: Interface for classes that resolve to a value of type T based on a widget's interactive "state", which is defined as a set of MaterialStates.
MaterialStatePropertyAll<T> = WidgetStatePropertyAll<T>: Convenience class for creating a MaterialStateProperty that resolves to the given value for all states.
MaterialStatesController = WidgetStatesController: Manages a set of MaterialStates and notifies listeners of changes.
MaterialStateTextStyle = WidgetStateTextStyle: Defines a TextStyle that is also a MaterialStateProperty.
MemoryAllocations = FlutterMemoryAllocations: An interface for listening to object lifecycle events.
MenuAcceleratorChildBuilder = Widget Function(BuildContext context, String label, int index): The type of builder function used for building a MenuAcceleratorLabel's MenuAcceleratorLabel.builder function.
MenuAnchorChildBuilder = Widget Function(BuildContext context, MenuController controller, Widget? child): The type of builder function used by MenuAnchor.builder to build the widget that the MenuAnchor surrounds.
MenuItemSerializableIdGenerator = int Function(PlatformMenuItem item): The signature for a function that generates unique menu item IDs for serialization of a PlatformMenuItem.
MessageHandler = Future<ByteData?>? Function(ByteData? message): A function which takes a platform message and asynchronously returns an encoded response.
MouseTrackerHitTest = HitTestResult Function(Offset offset, int viewId): Signature for hit testing at the given offset for the specified view.
MoveCursorHandler = void Function(bool extendSelection): Signature for SemanticsActions that move the cursor.
MoveExitWidgetSelectionButtonBuilder = Widget Function(BuildContext context, {required VoidCallback onPressed, required String semanticsLabel, bool usesDefaultAlignment}): Signature for the builder callback used by WidgetInspector.moveExitWidgetSelectionButtonBuilder.
NavigationRequestCallback = FutureOr<NavigationDecision> Function(NavigationRequest navigationRequest): Signature for callbacks that report a pending navigation request.
NavigatorFinderCallback = NavigatorState Function(BuildContext context): A callback that given a BuildContext finds a NavigatorState.
NestedScrollViewHeaderSliversBuilder = List<Widget> Function(BuildContext context, bool innerBoxIsScrolled): Signature used by NestedScrollView for building its header.
NotificationListenerCallback<T extends Notification> = bool Function(T notification): Signature for Notification listeners.
NullableIndexedWidgetBuilder = Widget? Function(BuildContext context, int index): Signature for a function that creates a widget for a given index, e.g., in a list, but may return null.
ObjectEventListener = void Function(ObjectEvent event): A listener of ObjectEvent.
OnInvokeCallback<T extends Intent> = Object? Function(T intent): The signature of a callback accepted by CallbackAction.onInvoke.
OnKeyEventCallback = KeyEventResult Function(KeyEvent event): Signature of a callback used by FocusManager.addEarlyKeyEventHandler and FocusManager.addLateKeyEventHandler.
OrientationWidgetBuilder = Widget Function(BuildContext context, Orientation orientation): Signature for a function that builds a widget given an Orientation.
OverlayChildLayoutBuilder = Widget Function(BuildContext context, OverlayChildLayoutInfo info): The signature of the widget builder callback used in OverlayPortal.overlayChildLayoutBuilder.
PageEventCallback = void Function(String url): Signature for callbacks that report page events triggered by the native web view.
PageRouteFactory = PageRoute<T> Function<T>(RouteSettings settings, WidgetBuilder builder): The signature of WidgetsApp.pageRouteBuilder.
PaintImageCallback = void Function(ImageSizeInfo info): Called when the framework is about to paint an Image to a Canvas with an ImageSizeInfo that contains the decoded size of the image as well as its output size.
PaintingContextCallback = void Function(PaintingContext context, Offset offset): Signature for painting into a PaintingContext.
PaintRangeValueIndicator = void Function(PaintingContext context, Offset offset): RangeSlider uses this callback to paint the value indicator on the overlay. Since the value indicator is painted on the Overlay; this method paints the value indicator in a RenderBox that appears in the Overlay.
PaintValueIndicator = void Function(PaintingContext context, Offset offset): Slider uses this callback to paint the value indicator on the overlay.
PipelineOwnerVisitor = void Function(PipelineOwner child): Signature for the callback to PipelineOwner.visitChildren.
PlatformMessageResponseCallback = void Function(ByteData? data): Signature for responses to platform messages.
PlatformViewCreatedCallback = void Function(int id): Callback signature for when a platform view was created.
PlatformViewSurfaceFactory = Widget Function(BuildContext context, PlatformViewController controller): A factory for a surface presenting a platform view as part of the widget hierarchy.
PointerCancelCallback = void Function(PointerCancelEvent event, LatLng point): Callback to notify when the map registers a pointer cancel event.
PointerCancelEventListener = void Function(PointerCancelEvent event): Signature for listening to PointerCancelEvent events.
PointerDownCallback = void Function(PointerDownEvent event, LatLng point): Callback to notify when the map registers a pointer down event.
PointerDownEventListener = void Function(PointerDownEvent event): Signature for listening to PointerDownEvent events.
PointerEnterEventListener = void Function(PointerEnterEvent event): Signature for listening to PointerEnterEvent events.
PointerExitEventListener = void Function(PointerExitEvent event): Signature for listening to PointerExitEvent events.
PointerHoverCallback = void Function(PointerHoverEvent event, LatLng point): Callback to notify when the map registers a pointer hover event.
PointerHoverEventListener = void Function(PointerHoverEvent event): Signature for listening to PointerHoverEvent events.
PointerMoveCallback = void Function(PointerMoveEvent event, LatLng point): Callback to notify when the map registers a pointer move event.
PointerMoveEventListener = void Function(PointerMoveEvent event): Signature for listening to PointerMoveEvent events.
PointerPanZoomEndEventListener = void Function(PointerPanZoomEndEvent event): Signature for listening to PointerPanZoomEndEvent events.
PointerPanZoomStartEventListener = void Function(PointerPanZoomStartEvent event): Signature for listening to PointerPanZoomStartEvent events.
PointerPanZoomUpdateEventListener = void Function(PointerPanZoomUpdateEvent event): Signature for listening to PointerPanZoomUpdateEvent events.
PointerRoute = void Function(PointerEvent event): A callback that receives a PointerEvent
PointerSignalEventListener = void Function(PointerSignalEvent event): Signature for listening to PointerSignalEvent events.
PointerSignalResolvedCallback = void Function(PointerSignalEvent event): The callback to register with a PointerSignalResolver to express interest in a pointer signal event.
PointerUpCallback = void Function(PointerUpEvent event, LatLng point): Callback to notify when the map registers a pointer up event.
PointerUpEventListener = void Function(PointerUpEvent event): Signature for listening to PointerUpEvent events.
PointTransformer = Offset Function(Offset position): Converts a given point from the global coordinate system in logical pixels to the local coordinate system for a box.
PopInvokedCallback = void Function(bool didPop): A callback type for informing that a navigation pop has been invoked, whether or not it was handled successfully.
PopInvokedWithResultCallback<T> = void Function(bool didPop, T? result): A callback type for informing that a navigation pop has been invoked, whether or not it was handled successfully.
PopPageCallback = bool Function(Route route, dynamic result): Signature for the Navigator.onPopPage callback.
PopResultCallback<T> = void Function(T? result): A signature for a function that is passed the result of a Route.
PopupMenuCanceled = void Function(): Signature for the callback invoked when a PopupMenuButton is dismissed without selecting an item.
PopupMenuItemBuilder<T> = List<PopupMenuEntry<T>> Function(BuildContext context): Signature used by PopupMenuButton to lazily construct the items shown when the button is pressed.
PopupMenuItemSelected<T> = void Function(T value): Signature for the callback invoked when a menu item is selected. The argument is the value of the PopupMenuItem that caused its menu to be dismissed.
PopupMenuPositionBuilder = RelativeRect Function(BuildContext context, BoxConstraints constraints): A builder that creates a RelativeRect to position a popup menu. Both BuildContext and BoxConstraints are from the PopupRoute that displays this menu.
PositionCallback = void Function(MapCamera camera, bool hasGesture): Callback that gets called when the viewport of the map changes.
PrintHandler = void Function(Zone self, ZoneDelegate parent, Zone zone, String line): The type of a custom Zone.print implementation function.
ProfilePaintCallback = void Function(RenderObject renderObject): Signature for debugOnProfilePaint implementations.
ProgressCallback = void Function(int progress): Signature for callbacks that report loading progress of a page.
RadioBuilder = Widget Function(BuildContext context, ToggleableStateMixin<StatefulWidget> state): Signature for RawRadio.builder.
RangeThumbSelector = Thumb? Function(TextDirection textDirection, RangeValues values, double tapValue, Size thumbSize, Size trackSize, double dx): Decides which thumbs (if any) should be selected.
RawDialogRouteBuilder<T> = Route<T> Function(BuildContext context, WidgetBuilder builder): A builder for a route that takes the build context and the widget intended to go inside the route as a parameter.
RawKeyEventHandler = bool Function(RawKeyEvent event): A callback type used by RawKeyboard.keyEventHandler to send key events to a handler that can determine if the key has been handled or not.
RawMenuAnchorChildBuilder = Widget Function(BuildContext context, MenuController controller, Widget? child): Signature for the builder function used by RawMenuAnchor.builder to build the widget that the RawMenuAnchor surrounds.
RawMenuAnchorCloseRequestedCallback = void Function(VoidCallback hideOverlay): Signature for the callback used by RawMenuAnchor.onCloseRequested to intercept requests to close a menu.
RawMenuAnchorOpenRequestedCallback = void Function(Offset? position, VoidCallback showOverlay): Signature for the callback used by RawMenuAnchor.onOpenRequested to intercept requests to open a menu.
RawMenuAnchorOverlayBuilder = Widget Function(BuildContext context, RawMenuOverlayInfo info): Signature for the builder function used by RawMenuAnchor.overlayBuilder to build a menu's overlay.
RebuildDirtyWidgetCallback = void Function(Element e, bool builtOnce): Signature for debugOnRebuildDirtyWidget implementations.
RecognizerCallback<T> = T Function(): Generic signature for callbacks passed to GestureRecognizer.invokeCallback. This allows the GestureRecognizer.invokeCallback mechanism to be generically used with anonymous functions that return objects of particular types.
RectCallback = Rect Function(): Signature for the callback used by ink effects to obtain the rectangle for the effect.
RefreshCallback = Future<void> Function(): The signature for a function that's called when the user has dragged a RefreshIndicator far enough to demonstrate that they want the app to refresh. The returned Future must complete when the refresh operation is finished.
RegisterBinaryCallbackHandler = ZoneBinaryCallback<R, T1, T2> Function<R, T1, T2>(Zone self, ZoneDelegate parent, Zone zone, R f(T1 arg1, T2 arg2)): The type of a custom Zone.registerBinaryCallback implementation function.
RegisterCallbackHandler = ZoneCallback<R> Function<R>(Zone self, ZoneDelegate parent, Zone zone, R f()): The type of a custom Zone.registerCallback implementation function.
RegisterServiceExtensionCallback = void Function({required ServiceExtensionCallback callback, required String name}): Signature for a method that registers the service extension callback with the given name.
RegisterUnaryCallbackHandler = ZoneUnaryCallback<R, T> Function<R, T>(Zone self, ZoneDelegate parent, Zone zone, R f(T arg)): The type of a custom Zone.registerUnaryCallback implementation function.
RegisterViewFactory = void Function(String, Object (int viewId), {bool isVisible}): Function signature for ui_web.platformViewRegistry.registerViewFactory.
RenderConstrainedLayoutBuilder<LayoutInfoType, ChildType extends RenderObject> = RenderAbstractLayoutBuilderMixin<LayoutInfoType, ChildType>: Generic mixin for RenderObjects created by an AbstractLayoutBuilder with the same LayoutInfoType.
RenderObjectVisitor = void Function(RenderObject child): Signature for a function that is called for each RenderObject.
ReorderCallback = void Function(int oldIndex, int newIndex): A callback used by ReorderableList to report that a list item has moved to a new position in the list.
ReorderDragBoundaryProvider = DragBoundaryDelegate<Rect>? Function(BuildContext context): Used to provide drag boundaries during drag-and-drop reordering.
ReorderItemProxyDecorator = Widget Function(Widget child, int index, Animation<double> animation): Signature for the builder callback used to decorate the dragging item in ReorderableList and SliverReorderableList.
RespondPointerEventCallback = void Function({required bool allowPlatformDefault}): A function that implements the PointerSignalEvent.respond method.
RestorableRouteBuilder<T> = Route<T> Function(BuildContext context, Object? arguments): Creates a Route that is to be added to a Navigator.
RouteCompletionCallback<T> = void Function(T result): A callback to handle the result of a completed Route.
RouteFactory = Route? Function(RouteSettings settings): Creates a route for the given route settings.
RouteListFactory = List<Route> Function(NavigatorState navigator, String initialRoute): Creates a series of one or more routes.
RoutePageBuilder = Widget Function(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation): Signature for the function that builds a route's primary contents. Used in PageRouteBuilder and showGeneralDialog.
RoutePredicate = bool Function(Route route): Signature for the Navigator.popUntil predicate argument.
RoutePresentationCallback = String Function(NavigatorState navigator, Object? arguments): A callback that given some arguments and a navigator adds a new restorable route to that navigator and returns the opaque ID of that new route.
RouteTransitionsBuilder = Widget Function(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation, Widget child): Signature for the function that builds a route's transitions. Used in PageRouteBuilder and showGeneralDialog.
RunBinaryHandler = R Function<R, T1, T2>(Zone self, ZoneDelegate parent, Zone zone, R f(T1 arg1, T2 arg2), T1 arg1, T2 arg2): The type of a custom Zone.runBinary implementation function.
RunHandler = R Function<R>(Zone self, ZoneDelegate parent, Zone zone, R f()): The type of a custom Zone.run implementation function.
RunUnaryHandler = R Function<R, T>(Zone self, ZoneDelegate parent, Zone zone, R f(T arg), T arg): The type of a custom Zone.runUnary implementation function.
ScheduleMicrotaskHandler = void Function(Zone self, ZoneDelegate parent, Zone zone, void f()): The type of a custom Zone.scheduleMicrotask implementation function.
ScrollableWidgetBuilder = Widget Function(BuildContext context, ScrollController scrollController): The signature of a method that provides a BuildContext and ScrollController for building a widget that may overflow the draggable Axis of the containing area.
ScrollControllerCallback = void Function(ScrollPosition position): Signature for when a ScrollController has added or removed a ScrollPosition.
ScrollIncrementCalculator = double Function(ScrollIncrementDetails details): A typedef for a function that can calculate the offset for a type of scroll increment given a ScrollIncrementDetails.
ScrollNotificationCallback = void Function(ScrollNotification notification): A ScrollNotification listener for ScrollNotificationObserver.
ScrollNotificationPredicate = bool Function(ScrollNotification notification): A predicate for ScrollNotification, used to customize widgets that listen to notifications from their children.
ScrollToOffsetHandler = void Function(Offset targetOffset): Signature for the SemanticsAction.scrollToOffset handlers to scroll the scrollable container to the given targetOffset.
SearchAnchorChildBuilder = Widget Function(BuildContext context, SearchController controller): Signature for a function that creates a Widget which is used to open a search view.
SearchCallback<T> = int? Function(List<DropdownMenuEntry<T>> entries, String query): A callback function that returns the index of the item that matches the current contents of a text field.
SelectableDayForRangePredicate = bool Function(DateTime day, DateTime? selectedStartDay, DateTime? selectedEndDay): Signature for predicating enabled dates in date range pickers.
SelectableDayPredicate = bool Function(DateTime day): Signature for predicating dates for enabled date selections.
SelectableRegionContextMenuBuilder = Widget Function(BuildContext context, SelectableRegionState selectableRegionState): Signature for a widget builder that builds a context menu for the given SelectableRegionState.
SelectionChangedCallback = void Function(TextSelection selection, SelectionChangedCause? cause): Signature for the callback that reports when the user changes the selection (including the cursor location).
SemanticFormatterCallback = String Function(double value): A callback that formats a numeric value from a Slider or RangeSlider widget.
SemanticIndexCallback = int? Function(Widget widget, int localIndex): A callback which produces a semantic index given a widget and the local index.
SemanticsActionHandler = void Function(Object? args): Signature for a handler of a SemanticsAction.
SemanticsBuilderCallback = List<CustomPainterSemantics> Function(Size size): Signature of the function returned by CustomPainter.semanticsBuilder.
SemanticsNodeVisitor = bool Function(SemanticsNode node): Signature for a function that is called for each SemanticsNode.
SemanticsUpdateCallback = void Function(SemanticsUpdate update): Signature for a function that receives a semantics update and returns no result.
ServiceExtensionCallback = Future<Map<String, dynamic>> Function(Map<String, String> parameters): Signature for service extensions.
SetSelectionHandler = void Function(TextSelection selection): Signature for the SemanticsAction.setSelection handlers to change the text selection (or re-position the cursor) to selection.
SetTextHandler = void Function(String text): Signature for the SemanticsAction.setText handlers to replace the current text with the input text.
ShaderCallback = Shader Function(Rect bounds): Signature for a function that creates a Shader for a given Rect.
ShaderWarmUpImageCallback = bool Function(Image image): The signature of debugCaptureShaderWarmUpImage.
ShaderWarmUpPictureCallback = bool Function(Picture picture): The signature of debugCaptureShaderWarmUpPicture.
SharedAppDataInitCallback<T> = T Function(): The type of the SharedAppData.getValue init parameter.
SliverHitTest = bool Function(SliverHitTestResult result, {required double crossAxisPosition, required double mainAxisPosition}): Method signature for hit testing a RenderSliver.
SliverLayoutWidgetBuilder = Widget Function(BuildContext context, SliverConstraints constraints): The signature of the SliverLayoutBuilder builder function.
StackTraceDemangler = StackTrace Function(StackTrace details): Signature for a function that demangles StackTrace objects into a format that can be parsed by StackFrame.
StatefulWidgetBuilder = Widget Function(BuildContext context, StateSetter setState): Signature for the builder callback used by StatefulBuilder.
StateSetter = void Function(VoidCallback fn): The signature of State.setState functions.
StepIconBuilder = Widget? Function(int stepIndex, StepState stepState): A builder that creates the icon widget for the Step at stepIndex, given stepState.
StringConversionSinkBase = StringConversionSink: This class provides a base-class for converters that need to accept String inputs.
StringConversionSinkMixin = StringConversionSink: This class provides a mixin for converters that need to accept String inputs.
SuggestionsBuilder = FutureOr<Iterable<Widget>> Function(BuildContext context, SearchController controller): Signature for a function that creates a Widget to build the suggestion list based on the input in the search bar.
SvgErrorWidgetBuilder = Widget Function(BuildContext context, Object error, StackTrace stackTrace): Builder function to create an error widget. This builder is called when the image failed loading.
SvgImageWidgetBuilder = Widget Function(BuildContext context, Widget child): Builder function to wrap the successfully loaded SVG widget.
SystemUiChangeCallback = Future<void> Function(bool systemOverlaysAreVisible): Signature for listening to changes in the SystemUiMode.
TabValueChanged<T> = void Function(T value, int index): Signature for TabBar callbacks that report that an underlying value has changed for a given Tab at index.
TapBehaviorButtonBuilder = Widget Function(BuildContext context, {required VoidCallback onPressed, required bool selectionOnTapEnabled, required String semanticsLabel}): Signature for the builder callback used by WidgetInspector.tapBehaviorButtonBuilder.
TapCallback = void Function(TapPosition tapPosition, LatLng point): Callback to notify when the map registers a confirmed short tap gesture.
TapPositionCallback = void Function(TapPosition position)
TapRegionCallback = void Function(PointerDownEvent event): Signature for a callback called for a PointerDownEvent relative to a TapRegion.
TapRegionUpCallback = void Function(PointerUpEvent event): Signature for a callback called for a PointerUpEvent relative to a TapRegion.
TextInputFormatFunction = TextEditingValue Function(TextEditingValue oldValue, TextEditingValue newValue): Function signature expected for creating custom TextInputFormatter shorthands via TextInputFormatter.withFunction.
TileBuilder = Widget Function(BuildContext context, Widget tileWidget, TileImage tile): Builder function that returns a TileBuilder instance.
TileUpdateTransformer = StreamTransformer<TileUpdateEvent, TileUpdateEvent>: Restricts and limits TileUpdateEvents (which are emitted 'by' MapEvents), which cause the tiles of the TileLayer to update (see below).
ToolbarBuilder = Widget Function(BuildContext context, Widget child): The type for a Function that builds a toolbar's container with the given child.
TooltipComponentBuilder = Widget Function(BuildContext context, Animation<double> animation): Signature for building the tooltip overlay child.
TooltipPositionDelegate = Offset Function(TooltipPositionContext context): Signature for computing the position of a tooltip.
TooltipTriggeredCallback = VoidCallback: Signature for when a tooltip is triggered.
TransformCallback = Matrix4 Function(double animationValue): Signature for the callback to MatrixTransition.onTransform.
TransitionBuilder = Widget Function(BuildContext context, Widget? child): A builder that builds a widget given a child.
TraversalRequestFocusCallback = void Function(FocusNode node, {double? alignment, ScrollPositionAlignmentPolicy? alignmentPolicy, Curve? curve, Duration? duration}): Signature for the callback that's called when a traversal policy requests focus.
TreeSliverNodeBuilder = Widget Function(BuildContext context, TreeSliverNode<Object?> node, AnimationStyle animationStyle): Signature for a function that creates a Widget to represent the given TreeSliverNode in the TreeSliver.
TreeSliverNodeCallback = void Function(TreeSliverNode<Object?> node): Signature for a function that is called when a TreeSliverNode is toggled, changing its expanded state.
TreeSliverNodesAnimation = ({int fromIndex, int toIndex, double value}): Represents the animation of the children of a parent TreeSliverNode that are animating into or out of view.
TreeSliverRowExtentBuilder = double Function(TreeSliverNode<Object?> node, SliverLayoutDimensions dimensions): Signature for a function that returns an extent for the given TreeSliverNode in the TreeSliver.
TweenConstructor<T extends Object> = Tween<T> Function(T targetValue): Signature for a Tween factory.
TweenVisitor<T extends Object> = Tween<T>? Function(Tween<T>? tween, T targetValue, TweenConstructor<T> constructor): Signature for callbacks passed to ImplicitlyAnimatedWidgetState.forEachTween.
TwoDimensionalIndexedWidgetBuilder = Widget? Function(BuildContext context, ChildVicinity vicinity): Signature for a function that creates a widget for a given ChildVicinity, e.g., in a TwoDimensionalScrollView, but may return null.
TwoDimensionalViewportBuilder = Widget Function(BuildContext context, ViewportOffset verticalPosition, ViewportOffset horizontalPosition): Signature used by TwoDimensionalScrollable to build the viewport through which the scrollable content is displayed.
UBoolCallback = void Function(bool isFront): Called with true when the front is showing.
UCrashListener = void Function(Map<String, dynamic> errorData): Receives each crash report as a JSON-ready map (error, stack, app, device, screen).
UDocBlobSourceBuilder = Future<UDocByteSource> Function(Object handle, {String? id}): Internal: builds a byte source for a web blob.
UHtmlImageBuilder = Widget Function(BuildContext context, String url, String? alt, double? width): Signature for building a custom widget for an <img> found in the HTML.
ULoadingPercentBuilder = Widget Function(BuildContext context, int percent): Builds your own percent label for ULoading, from 0-100.
UntilPredicate = bool Function(int offset, bool forward): Signature for a predicate that takes an offset into a UTF-16 string, and a boolean that indicates the search direction.
UOnUrlChanged = void Function(String url, Map<String, String> queryParameters): Called with a new URL and its query parameters.
UPdfPageOverlayBuilder = Widget Function(BuildContext context, int pageIndex, Size pageSize, double scale): Builds extra widgets on top of a page (sized to the displayed page).
UProgressLabelBuilder = Widget? Function(BuildContext context, int? value): Builds the label from the value (null value = indeterminate).
URichImageUploader = Future<String?> Function(UFileData file): Signature for uploading a picked image and returning its final URL (or null on failure). Provide your own to plug in any backend; when omitted the editor uploads through UServices.media.
UWebMessageHandler = void Function(String origin, Map<String, dynamic> data): Callback for window.postMessage: the sender's origin and its JSON data.
ValueChanged<T> = void Function(T value): Signature for callbacks that report that an underlying value has changed.
ValueGetter<T> = T Function(): Signature for callbacks that are to report a value on demand.
ValueListenableTransformer<T> = T Function(T): Signature for method used to transform values in Animation.fromValueListenable.
ValueSetter<T> = void Function(T value): Signature for callbacks that report that a value has been set.
ValueWidgetBuilder<T> = Widget Function(BuildContext context, T value, Widget? child): Builds a Widget when given a concrete value of a ValueListenable<T>.
ViewBuilder = Widget Function(Iterable<Widget> suggestions): Signature for a function that creates a Widget to layout the suggestion list.
ViewportBuilder = Widget Function(BuildContext context, ViewportOffset position): Signature used by Scrollable to build the viewport through which the scrollable content is displayed.
VoidCallback = void Function(): Signature of callbacks that have no arguments and return no data.
WebResourceErrorCallback = void Function(WebResourceError error): Signature for callbacks that report a resource loading error.
WidgetBuilder = Widget Function(BuildContext context): Signature for a function that creates a widget, e.g. StatelessWidget.build or State.build.
WidgetPropertyResolver<T> = T Function(Set<WidgetState> states): Signature for the function that returns a value of type T based on a given set of states.
WidgetStateMap<T> = Map<WidgetStatesConstraint, T>: A Map used to resolve to a single value of type T based on the current set of Widget states.
WillPopCallback = Future<bool> Function(): Signature for a callback that verifies that it's OK to call Navigator.pop.
ZoneBinaryCallback<R, T1, T2> = R Function(T1, T2): A two-argument function, like the argument to Zone.runBinary.
ZoneCallback<R> = R Function(): A no-argument function, like the argument to Zone.run.
ZoneUnaryCallback<R, T> = R Function(T): A one-argument function, like the argument to Zone.runUnary.

Exceptions / Errors

AsyncError: An error and a stack trace.
CachedMapTileReadFailure: Indicates that the tile with the given URL was present in the cache, but could not be correctly read
CertificateException: An exception that happens in the handshake phase of establishing a secure network connection, when looking up or verifying a certificate.
ClientException: An exception caused by an error in a pkg/http client.
DeferredLoadException: Thrown when a deferred library fails to load.
FileSystemException: Exception thrown when a file operation fails.
FlutterError: Error class used to report Flutter-specific assertion failures and contract violations.
HandshakeException: An exception that happens in the handshake phase of establishing a secure network connection.
HostConfigException: Host settings are invalid.
HttpException
IllegalCharacterInFileNameException: An exception that is thrown when a file name contains characters that are not allowed for the underlying platform.
IOException: Base class for all IO related exceptions.
IsoFieldException: Thrown when a single field fails to pack or unpack, carrying the field number so a reject can name it.
IsoSecurityException: The security module failed.
IsoTransportException: The connection to the host failed.
JavaScriptExecutionException: An error thrown or rejected by an asynchronous JavaScript invocation.
JsonCyclicError: Reports that an object could not be stringified due to cyclic references.
JsonUnsupportedObjectError: Error thrown by JSON serialization if an object cannot be serialized.
MissingPlatformDirectoryException: An exception thrown when a directory that should always be available on the current platform cannot be obtained.
MissingPluginException: Thrown to indicate that a platform interaction failed to find a handling plugin.
NetworkImageLoadException: The exception thrown when the HTTP request to load a network image fails.
OSError: An Exception holding information about an error from the operating system.
ParallelWaitError<V, E>: Error thrown when waiting for multiple futures, when some have errors.
PathAccessException: Exception thrown when a file operation fails because the necessary access rights are not available.
PathExistsException: Exception thrown when a file operation fails because the target path already exists.
PathNotFoundException: Exception thrown when a file operation fails because a file or directory does not exist.
PlatformException: Thrown to indicate that a platform interaction failed in the platform plugin.
ProcessException
RedirectException
RequestAbortedException: Thrown when an HTTP request is aborted.
SignalException
SocketException: Exception thrown when a socket operation fails.
StdinException: Exception thrown by some operations of Stdin
StdoutException: Exception thrown by some operations of Stdout
TickerCanceled: Exception thrown by Ticker objects on the TickerFuture.orCancel future when the ticker is canceled.
TimeoutException: Thrown when a scheduled timeout happens while waiting for an async result.
TlsException: A secure networking exception caused by a failure in the TLS/SSL protocol.
UArException: An AR error with a code and message.
UAuthenticationException: Thrown when an AEAD tag does not verify: the data was modified, truncated, reordered, or decrypted with the wrong key.
UCameraException: A camera error with a code and message.
UCodeDecodeException: Thrown when a code cannot be decoded.
UDocError: A document error with a code and message.
UDocParseException: A document could not be parsed.
UDownloadError: A failure described without the URL, so it is safe to show and to log.
UIsoException: Error thrown inside the ISO layer; UIsoClient.send turns it into onException.
ULocationException: Thrown into position / heading streams.
UMediaError: A playback error with a code and message.
UMediaParseException: A playlist/subtitle/tag could not be parsed.
WebSocketException

utilities library

Classes

Enums

Mixins

Extension Types

Extensions

Constants

Properties

Functions

Typedefs

Exceptions / Errors

u package

utilities library