VerticalDragGestureRecognizer class

Recognizes movement in the vertical direction.

Used for vertical scrolling.

See also:

Inheritance

Constructors

VerticalDragGestureRecognizer({Object debugOwner })
Create a gesture recognizer for interactions in the vertical axis.

Properties

debugDescription String
Returns a very short pretty description of the gesture that the recognizer looks for, like 'tap' or 'horizontal drag'.
read-only
debugOwner Object
The recognizer's owner. [...]
final, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
maxFlingVelocity double
Fling velocity magnitudes will be clamped to this value. [...]
read / write, inherited
minFlingDistance double
The minimum distance an input pointer drag must have moved to to be considered a fling gesture. [...]
read / write, inherited
minFlingVelocity double
The minimum velocity for an input pointer drag to be considered fling. [...]
read / write, inherited
onCancel GestureDragCancelCallback
The pointer that previously triggered onDown did not complete.
read / write, inherited
onDown GestureDragDownCallback
A pointer has contacted the screen and might begin to move. [...]
read / write, inherited
onEnd GestureDragEndCallback
A pointer that was previously in contact with the screen and moving is no longer in contact with the screen and was moving at a specific velocity when it stopped contacting the screen. [...]
read / write, inherited
onStart GestureDragStartCallback
A pointer has contacted the screen and has begun to move. [...]
read / write, inherited
onUpdate GestureDragUpdateCallback
A pointer that is in contact with the screen and moving has moved again. [...]
read / write, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
team GestureArenaTeam
The team that this recognizer belongs to, if any. [...]
read / write, inherited

Methods

acceptGesture(int pointer) → void
inherited
addPointer(PointerEvent 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
inherited
didStopTrackingLastPointer(int pointer) → void
Called when the number of pointers this recognizer is tracking changes from one to zero. [...]
inherited
dispose() → void
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. [...]
@pragma('vm:entry-point'), inherited
rejectGesture(int pointer) → void
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
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
inherited

Operators

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