LongPressDraggable<T extends Object> class Null safety

Makes its child draggable starting from long press.

See also:

Inheritance

Constructors

LongPressDraggable({Key? key, required Widget child, required Widget feedback, T? data, Axis? axis, Widget? childWhenDragging, Offset feedbackOffset = Offset.zero, @Deprecated('Use dragAnchorStrategy instead. ' 'Replace "dragAnchor: DragAnchor.child" with "dragAnchorStrategy: childDragAnchorStrategy". ' 'Replace "dragAnchor: DragAnchor.pointer" with "dragAnchorStrategy: pointerDragAnchorStrategy". ' 'This feature was deprecated after v2.1.0-10.0.pre.') DragAnchor dragAnchor = DragAnchor.child, DragAnchorStrategy? dragAnchorStrategy, int? maxSimultaneousDrags, VoidCallback? onDragStarted, DragUpdateCallback? onDragUpdate, DraggableCanceledCallback? onDraggableCanceled, DragEndCallback? onDragEnd, VoidCallback? onDragCompleted, bool hapticFeedbackOnStart, bool ignoringFeedbackSemantics = true, Duration delay})
Creates a widget that can be dragged starting from long press. [...]
const

Properties

affinity → Axis?
Controls how this widget competes with other gestures to initiate a drag. [...]
final, inherited
axis → Axis?
The Axis to restrict this draggable's movement, if specified. [...]
final, inherited
child → Widget
The widget below this widget in the tree. [...]
final, inherited
childWhenDragging → Widget?
The widget to display instead of child when one or more drags are under way. [...]
final, inherited
data → T?
The data that will be dropped by this draggable.
final, inherited
delay → Duration
The duration that a user has to press down before a long press is registered. [...]
final
dragAnchor → DragAnchor
Where this widget should be anchored during a drag. [...]
@Deprecated('Use dragAnchorStrategy instead. ' 'This feature was deprecated after v2.1.0-10.0.pre.'), final, inherited
dragAnchorStrategy → DragAnchorStrategy?
A strategy that is used by this draggable to get the anchor offset when it is dragged. [...]
final, inherited
feedback → Widget
The widget to show under the pointer when a drag is under way. [...]
final, inherited
feedbackOffset → Offset
The feedbackOffset can be used to set the hit test target point for the purposes of finding a drag target. It is especially useful if the feedback is transformed compared to the child.
final, inherited
hapticFeedbackOnStart → bool
Whether haptic feedback should be triggered on drag start.
final
hashCode → int
The hash code for this object. [...]
@nonVirtual, read-only, inherited
hitTestBehavior → HitTestBehavior
How to behave during hit test. [...]
final, inherited
ignoringFeedbackSemantics → bool
Whether the semantics of the feedback widget is ignored when building the semantics tree. [...]
final, inherited
key → Key?
Controls how one widget replaces another widget in the tree. [...]
final, inherited
maxSimultaneousDrags → int?
How many simultaneous drags to support. [...]
final, inherited
onDragCompleted → VoidCallback?
Called when the draggable is dropped and accepted by a DragTarget. [...]
final, inherited
onDragEnd → DragEndCallback?
Called when the draggable is dropped. [...]
final, inherited
onDraggableCanceled → DraggableCanceledCallback?
Called when the draggable is dropped without being accepted by a DragTarget. [...]
final, inherited
onDragStarted → VoidCallback?
Called when the draggable starts being dragged.
final, inherited
onDragUpdate → DragUpdateCallback?
Called when the draggable is dragged. [...]
final, inherited
rootOverlay → bool
Whether the feedback widget will be put on the root Overlay. [...]
final, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
inherited
createRecognizer(GestureMultiDragStartCallback onStart) → DelayedMultiDragGestureRecognizer
Creates a gesture recognizer that recognizes the start of the drag. [...]
override
createState() → _DraggableState<T>
Creates the mutable state for this widget at a given location in the tree. [...]
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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}) → 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. [...]
@nonVirtual, inherited