LongPressDragGestureRecognizer class

Recognizes long presses that can be subsequently dragged around.

Similar to a LongPressGestureRecognizer where a press has to be held down at the same location for a long period of time. However drag events that occur after the long-press hold threshold has past will not cancel the gesture. The onLongPressDragUpdate callback will be called until an up event occurs.

See also:

Inheritance

Constructors

LongPressDragGestureRecognizer({Object debugOwner })
Creates a long-press-drag gesture recognizer. [...]

Properties

debugDescription String
Returns a very short pretty description of the gesture that the recognizer looks for, like 'tap' or 'horizontal drag'.
read-only, override
onLongPressDragUpdate GestureLongPressDragUpdateCallback
Called as the primary pointer is dragged after the long press.
read / write
onLongPressStart GestureLongPressDragStartCallback
Called when a long press gesture has been recognized.
read / write
onLongPressUp GestureLongPressDragUpCallback
Called when the pointer stops contacting the screen after the long-press gesture has been recognized.
read / write
deadline Duration
If non-null, the recognizer will call didExceedDeadline after this amount of time has elapsed since starting to track the primary pointer.
final, inherited
debugOwner Object
The recognizer's owner. [...]
final, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
initialPosition Offset
The global location at which the primary pointer contacted the screen.
read / write, inherited
postAcceptSlopTolerance double
The maximum distance in logical pixels the gesture is allowed to drift after the gesture has been accepted. [...]
final, inherited
preAcceptSlopTolerance double
The maximum distance in logical pixels the gesture is allowed to drift from the initial touch down position before the gesture is accepted. [...]
final, inherited
primaryPointer int
The ID of the primary pointer this recognizer is tracking.
read / write, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
state GestureRecognizerState
The current state of the recognizer. [...]
read / write, inherited
team GestureArenaTeam
The team that this recognizer belongs to, if any. [...]
read / write, inherited

Methods

acceptGesture(int pointer) → void
Called when this member wins the arena for the given pointer id.
override
didExceedDeadline() → void
Override to be notified when deadline is exceeded. [...]
override
didStopTrackingLastPointer(int pointer) → void
Called when the number of pointers this recognizer is tracking changes from one to zero. [...]
override
handlePrimaryPointer(PointerEvent event) → void
Override to provide behavior for the primary pointer when the gesture is still possible.
override
addPointer(PointerDownEvent event) → void
Registers a new pointer that might be relevant to this gesture detector. [...]
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
dispose() → void
Releases any resources used by the object. [...]
inherited
handleEvent(PointerEvent event) → void
Called when a pointer event is routed to this recognizer.
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
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
rejectGesture(int pointer) → void
Called when this member loses the arena for the given pointer id.
inherited
resolve(GestureDisposition disposition) → void
Resolves this recognizer's participation in each gesture arena with the given disposition.
@mustCallSuper, @protected, inherited
startTrackingPointer(int pointer) → void
Causes events related to the given pointer ID to be routed to this recognizer. [...]
@protected, inherited
stopTrackingIfPointerNoLongerDown(PointerEvent event) → void
Stops tracking the pointer associated with the given event if the event is a PointerUpEvent or a PointerCancelEvent event.
@protected, inherited
stopTrackingPointer(int pointer) → void
Stops events related to the given pointer ID from being routed to this recognizer. [...]
@protected, 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.debug }) String
Returns 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 brief description of this object, usually just the runtimeType and the hashCode. [...]
inherited

Operators

operator ==(dynamic other) bool
The equality operator. [...]
inherited