LongPressDraggable<T extends Object> class
Makes its child draggable starting from long press.
See also:
- Draggable, similar to the LongPressDraggable widget but happens immediately.
- DragTarget, a widget that receives data when a Draggable widget is dropped.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- Draggable<
T> - LongPressDraggable
Constructors
- LongPressDraggable.new({Key? key, required Widget child, required Widget feedback, T? data, Axis? axis, Widget? childWhenDragging, Offset feedbackOffset = Offset.zero, DragAnchorStrategy dragAnchorStrategy = childDragAnchorStrategy, int? maxSimultaneousDrags, VoidCallback? onDragStarted, DragUpdateCallback? onDragUpdate, DraggableCanceledCallback? onDraggableCanceled, DragEndCallback? onDragEnd, VoidCallback? onDragCompleted, bool hapticFeedbackOnStart = true, bool ignoringFeedbackSemantics = true, bool ignoringFeedbackPointer = true, Duration delay = kLongPressTimeout, AllowedButtonsFilter? allowedButtonsFilter, HitTestBehavior hitTestBehavior = HitTestBehavior.deferToChild, bool rootOverlay = false})
-
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.
finalinherited
- allowedButtonsFilter → AllowedButtonsFilter?
-
Called when interaction starts. This limits the dragging behavior
for custom clicks (such as scroll click). Its parameter comes
from PointerEvent.buttons.
finalinherited
- axis → Axis?
-
The Axis to restrict this draggable's movement, if specified.
finalinherited
- child → Widget
-
The widget below this widget in the tree.
finalinherited
- childWhenDragging → Widget?
-
The widget to display instead of child when one or more drags are under way.
finalinherited
- data → T?
-
The data that will be dropped by this draggable.
finalinherited
- delay → Duration
-
The duration that a user has to press down before a long press is registered.
final
- dragAnchorStrategy → DragAnchorStrategy
-
A strategy that is used by this draggable to get the anchor offset when it
is dragged.
finalinherited
- feedback → Widget
-
The widget to show under the pointer when a drag is under way.
finalinherited
- 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.
finalinherited
- hapticFeedbackOnStart → bool
-
Whether haptic feedback should be triggered on drag start.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- hitTestBehavior → HitTestBehavior
-
How to behave during hit test.
finalinherited
- ignoringFeedbackPointer → bool
-
Whether the feedback widget is ignored during hit testing.
finalinherited
- ignoringFeedbackSemantics → bool
-
Whether the semantics of the feedback widget is ignored when building
the semantics tree.
finalinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- maxSimultaneousDrags → int?
-
How many simultaneous drags to support.
finalinherited
- onDragCompleted → VoidCallback?
-
Called when the draggable is dropped and accepted by a DragTarget.
finalinherited
- onDragEnd → DragEndCallback?
-
Called when the draggable is dropped.
finalinherited
- onDraggableCanceled → DraggableCanceledCallback?
-
Called when the draggable is dropped without being accepted by a DragTarget.
finalinherited
- onDragStarted → VoidCallback?
-
Called when the draggable starts being dragged.
finalinherited
- onDragUpdate → DragUpdateCallback?
-
Called when the draggable is dragged.
finalinherited
- rootOverlay → bool
-
Whether the feedback widget will be put on the root Overlay.
finalinherited
- 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
-
createRecognizer(
GestureMultiDragStartCallback onStart) → DelayedMultiDragGestureRecognizer -
Creates a gesture recognizer that recognizes the start of the drag.
override
-
createState(
) → State< Draggable< 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.
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