DraggableWidget class

A widget that wraps its child with drag behavior.

Draggable provides a convenient way to make any widget draggable with customizable callbacks and constraints.

Inheritance

Constructors

DraggableWidget({Key? key, required Widget child, void onDragStart(DragState state)?, void onDragUpdate(DragState state)?, void onDragEnd(DragState state)?, void onDragCancel()?, bool enabled = true, DragDirection direction = DragDirection.both, DragConstraints? constraints, HitTestBehavior behavior = HitTestBehavior.deferToChild, Widget feedbackBuilder(BuildContext context, DragState state)?})
Creates a DraggableWidget.
const

Properties

behavior → HitTestBehavior
The hit test behavior for the gesture detector.
final
child → Widget
The child widget to make draggable.
final
constraints → DragConstraints?
Constraints for the drag operation.
final
direction → DragDirection
The direction of allowed drag movement.
final
enabled → bool
Whether drag is enabled.
final
feedbackBuilder → Widget Function(BuildContext context, DragState state)?
Optional feedback widget to show during drag.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onDragCancel → void Function()?
Called when a drag operation is cancelled.
final
onDragEnd → void Function(DragState state)?
Called when a drag operation ends.
final
onDragStart → void Function(DragState state)?
Called when a drag operation starts.
final
onDragUpdate → void Function(DragState state)?
Called when the drag position updates.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<DraggableWidget>
Creates the mutable state for this widget at a given location in the tree.
override
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