EmptySafeBuilder<T> class

A builder widget invoke different builder based on whether value is empty or not.

If is useful when content is nullable Or used to wrap widgets like ListView doesn't support empty list.

Inheritance

Constructors

EmptySafeBuilder({Key? key, required T? content, EmptyChecker<T>? emptyChecker, Widget? child, TransitionBuilder? emptyBuilder, required ValueWidgetBuilder<T> builder})
Create the widget

Properties

builder → ValueWidgetBuilder<T>
Builder to be used when content isn't empty
final
child → Widget?
Prebuild child widget
final
content → T?
The given content
final
emptyBuilder → TransitionBuilder
Builder to be used when content is empty
final
emptyChecker → EmptyChecker<T>
Function returns true when content is empty
final
hashCode → int
The hash code for this object.
no setterinherited
isEmpty → bool
Check is content empty or not
no setter
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

defaultEmptyBuilder(BuildContext context, Widget? child) → Widget
Default empty builder Returns child or an empty Container
defaultEmptyChecker(dynamic content) → bool
Default empty checker. It supports Iterable,Map or String. Otherwise, anything not null is considere as not empty