DelayedMultiDragGestureRecognizer class Null safety

Recognizes movement both horizontally and vertically on a per-pointer basis after a delay.

In contrast to ImmediateMultiDragGestureRecognizer, DelayedMultiDragGestureRecognizer waits for a delay before recognizing the drag. If the pointer moves more than kTouchSlop before the delay expires, the gesture is not recognized.

In contrast to PanGestureRecognizer, DelayedMultiDragGestureRecognizer watches each pointer separately, which means multiple drags can be recognized concurrently if multiple pointers are in contact with the screen.

See also:



DelayedMultiDragGestureRecognizer({Duration delay = kLongPressTimeout, Object? debugOwner, @Deprecated('Migrate to supportedDevices. ' 'This feature was deprecated after v2.3.0-1.0.pre.') PointerDeviceKind? kind, Set<PointerDeviceKind>? supportedDevices})
Creates a drag recognizer that works on a per-pointer basis after a delay. [...]


debugDescription String
Returns a very short pretty description of the gesture that the recognizer looks for, like 'tap' or 'horizontal drag'.
read-only, override
debugOwner Object?
The recognizer's owner. [...]
final, inherited
delay Duration
The amount of time the pointer must remain in the same place for the drag to be recognized.
gestureSettings DeviceGestureSettings?
Optional device specific configuration for device gestures that will take precedence over framework defaults.
read / write, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
onStart GestureMultiDragStartCallback?
Called when this class recognizes the start of a drag gesture. [...]
read / write, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited


acceptGesture(int pointer) → void
Called when this member wins the arena for the given pointer id.
addAllowedPointer(PointerDownEvent event) → void
Registers a new pointer that's been checked to be allowed by this gesture recognizer. [...]
addPointer(PointerDownEvent event) → void
Registers a new pointer that might be relevant to this gesture detector. [...]
createNewPointerState(PointerDownEvent event) MultiDragPointerState
Subclasses should override this method to create per-pointer state objects to track the pointer associated with the given event.
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
dispose() → void
Releases any resources used by the object. [...]
getKindForPointer(int pointer) PointerDeviceKind
For a given pointer ID, returns the device kind associated with it. [...]
@protected, inherited
handleNonAllowedPointer(PointerDownEvent event) → void
Handles a pointer being added that's not allowed by this recognizer. [...]
@protected, inherited
invokeCallback<T>(String name, RecognizerCallback<T> callback, {String debugReport()?}) → T?
Invoke a callback provided by the application, catching and logging any exceptions. [...]
@protected, inherited
isPointerAllowed(PointerDownEvent event) bool
Checks whether or not a pointer is allowed to be tracked by this recognizer.
@protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
rejectGesture(int pointer) → void
Called when this member loses the arena for the given pointer id.
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep. [...]
toString({DiagnosticLevel minLevel =}) String
A string representation of this object. [...]
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants. [...]
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object. [...]
toStringShort() String
A brief description of this object, usually just the runtimeType and the hashCode. [...]


operator ==(Object other) bool
The equality operator. [...]