CompetitiveDragGestureRecognizer class
abstract
Properties
debugDescription
→ String
Returns a very short pretty description of the gesture that the
recognizer looks for, like 'tap' or 'horizontal drag'.
no setter inherited
debugOwner
→ Object ?
The recognizer's owner.
final inherited
dragStartBehavior
↔ DragStartBehavior
Configure the behavior of offsets sent to onStart .
getter/setter pair
gestureSettings
↔ DeviceGestureSettings ?
Optional device specific configuration for device gestures that will
take precedence over framework defaults.
getter/setter pair inherited
hashCode
→ int
The hash code for this object.
no setter inherited
maxFlingVelocity
↔ double ?
Fling velocity magnitudes will be clamped to this value.
getter/setter pair
minFlingDistance
↔ double ?
The minimum distance an input pointer drag must have moved to
to be considered a fling gesture.
getter/setter pair
minFlingVelocity
↔ double ?
The minimum velocity for an input pointer drag to be considered fling.
getter/setter pair
onCancel
↔ GestureDragCancelCallback ?
The pointer that previously triggered onDown did not complete.
getter/setter pair
onDown
↔ GestureDragDownCallback ?
A pointer has contacted the screen with a primary button and might begin
to move.
getter/setter pair
onEnd
↔ GestureDragEndCallback ?
A pointer that was previously in contact with the screen with a primary
button and moving is no longer in contact with the screen and was moving
at a specific velocity when it stopped contacting the screen.
getter/setter pair
onStart
↔ GestureDragStartCallback ?
A pointer has contacted the screen with a primary button and has begun to
move.
getter/setter pair
onUpdate
↔ GestureDragUpdateCallback ?
A pointer that is in contact with the screen with a primary button and
moving has moved again.
getter/setter pair
runtimeType
→ Type
A representation of the runtime type of the object.
no setter inherited
supportedDevices
↔ Set <PointerDeviceKind > ?
The kind of devices that are allowed to be recognized as provided by
supportedDevices
in the constructor, or the currently deprecated kind
.
These cannot both be set. If both are null, events from all device kinds will be
tracked and recognized.
getter/setter pair inherited
team
↔ GestureArenaTeam ?
The team that this recognizer belongs to, if any.
getter/setter pair inherited
velocityTrackerBuilder
↔ GestureVelocityTrackerBuilder
Determines the type of velocity estimation method to use for a potential
drag gesture, when a new pointer is added.
getter/setter pair
Methods
acceptGesture (int pointer )
→ void
Called when this member wins the arena for the given pointer id.
override
addAllowedPointer (PointerEvent event )
→ void
Registers a new pointer that's been checked to be allowed by this gesture
recognizer.
override
addAllowedPointerPanZoom (PointerPanZoomStartEvent event )
→ void
Registers a new pointer pan/zoom that's been checked to be allowed by this
gesture recognizer.
inherited
addPointer (PointerDownEvent event )
→ void
Registers a new pointer that might be relevant to this gesture
detector.
inherited
addPointerPanZoom (PointerPanZoomStartEvent event )
→ void
Registers a new pointer pan/zoom 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.
override
didStopTrackingLastPointer (int pointer )
→ void
Called when the number of pointers this recognizer is tracking changes from one to zero.
override
dispose ()
→ void
Releases any resources used by the object.
override
getKindForPointer (int pointer )
→ PointerDeviceKind
For a given pointer ID, returns the device kind associated with it.
inherited
handleEvent (PointerEvent event )
→ void
Called when a pointer event is routed to this recognizer.
override
handleNonAllowedPointer (PointerDownEvent event )
→ void
Handles a pointer being added that's not allowed by this recognizer.
inherited
handleNonAllowedPointerPanZoom (PointerPanZoomStartEvent event )
→ void
Handles a pointer pan/zoom being added that's not allowed by 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.
inherited
isFlingGesture (VelocityEstimate estimate , PointerDeviceKind kind )
→ bool
Determines if a gesture is a fling or not based on velocity.
isPointerAllowed (PointerEvent event )
→ bool
Checks whether or not a pointer is allowed to be tracked by this recognizer.
override
isPointerPanZoomAllowed (PointerPanZoomStartEvent event )
→ bool
Checks whether or not a pointer pan/zoom is allowed to be tracked by this recognizer.
inherited
noSuchMethod (Invocation invocation )
→ dynamic
Invoked when a nonexistent method or property is accessed.
inherited
rejectGesture (int pointer )
→ void
Called when this member loses the arena for the given pointer id.
override
resolve (GestureDisposition disposition )
→ void
Resolves this recognizer's participation in each gesture arena with the
given disposition.
inherited
resolvePointer (int pointer , GestureDisposition disposition )
→ void
Resolves this recognizer's participation in the given gesture arena with
the given disposition.
inherited
startTrackingPointer (int pointer , [Matrix4 ? transform ])
→ void
Causes events related to the given pointer ID to be routed to this recognizer.
inherited
stopTrackingIfPointerNoLongerDown (PointerEvent event )
→ void
Stops tracking the pointer associated with the given event if the event is
a PointerUpEvent or a PointerCancelEvent event.
inherited
stopTrackingPointer (int pointer )
→ void
Stops events related to the given pointer ID from being routed to this recognizer.
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 brief description of this object, usually just the runtimeType and the
hashCode .
inherited