gesture library

Classes

CompetitiveDragGestureRecognizer
DragDownDetails
Details object for callbacks that use GestureDragDownCallback.
DragEndDetails
Details object for callbacks that use GestureDragEndCallback.
DragStartDetails
Details object for callbacks that use GestureDragStartCallback.
DragUpdateDetails
Details object for callbacks that use GestureDragUpdateCallback.
ForcePressDetails
Details object for callbacks that use GestureForcePressStartCallback, GestureForcePressPeakCallback, GestureForcePressEndCallback or GestureForcePressUpdateCallback.
GestureDispatcher
GestureListener
Widget can user EventClient to add event listener on viewport.
GestureRecognizerFactory<T extends GestureRecognizer?>
Factory for creating gesture recognizers.
GestureRecognizerFactoryWithHandlers<T extends GestureRecognizer>
Factory for creating gesture recognizers that delegates to callbacks.
LongPressEndDetails
Details for callbacks that use GestureLongPressEndCallback.
LongPressMoveUpdateDetails
Details for callbacks that use GestureLongPressMoveUpdateCallback.
LongPressStartDetails
Details for callbacks that use GestureLongPressStartCallback.
RenderSemanticsGestureHandler
Listens for the specified gestures from the semantics server (e.g. an accessibility tool).
ScaleEndDetails
Details for GestureScaleEndCallback.
ScaleStartDetails
Details for GestureScaleStartCallback.
ScaleUpdateDetails
Details for GestureScaleUpdateCallback.
ScrollHorizontalDragGestureRecognizer
Recognizes movement in the horizontal direction.
ScrollVerticalDragGestureRecognizer
Recognizes movement in the vertical direction.
SwipeDetails
SwipeGestureRecognizer
TapDownDetails
Details for GestureTapDownCallback, such as position.
TapUpDetails
Details for GestureTapUpCallback, such as position.
TouchPoint
Velocity
A velocity in two dimensions.
WebFScrollable

Enums

PointState

Constants

DIRECTION_DOWN → const String
DIRECTION_LEFT → const String
DIRECTION_RIGHT → const String
DIRECTION_UP → const String
kPrecisePointerSwipeSlop → const double
Like kSwipeSlop, but for more precise pointers like mice and trackpads.
kSwipeSlop → const double
The distance a touch has to travel for the framework to be confident that the gesture is a swipe gesture.

Functions

computeSwipeSlop(PointerDeviceKind kind) double
Determine the approriate pan slop pixels based on the kind of pointer.
createScrollPhysics({ScrollPhysics? parent}) ScrollPhysics

Typedefs

GestureDragCancelCallback = void Function()
Signature for when the pointer that previously triggered a GestureDragDownCallback did not complete.
GestureDragDownCallback = void Function(DragDownDetails details)
Signature for when a pointer has contacted the screen and might begin to move.
GestureDragEndCallback = void Function(DragEndDetails details)
Signature for when a pointer that was previously in contact with the screen and moving is no longer in contact with the screen.
GestureDragStartCallback = void Function(DragStartDetails details)
Signature for when a pointer has contacted the screen and has begun to move.
GestureDragUpdateCallback = void Function(DragUpdateDetails details)
Signature for when a pointer that is in contact with the screen and moving has moved again.
GestureEventListener = void Function(GestureEvent event)
GestureForcePressEndCallback = void Function(ForcePressDetails details)
Signature for when the pointer that previously triggered a ForcePressGestureRecognizer.onStart callback is no longer in contact with the screen.
GestureForcePressPeakCallback = void Function(ForcePressDetails details)
Signature used by ForcePressGestureRecognizer for when a pointer that has pressed with at least ForcePressGestureRecognizer.peakPressure.
GestureForcePressStartCallback = void Function(ForcePressDetails details)
Signature used by a ForcePressGestureRecognizer for when a pointer has pressed with at least ForcePressGestureRecognizer.startPressure.
GestureForcePressUpdateCallback = void Function(ForcePressDetails details)
Signature used by ForcePressGestureRecognizer during the frames after the triggering of a ForcePressGestureRecognizer.onStart callback.
GestureLongPressCallback = void Function()
Callback signature for LongPressGestureRecognizer.onLongPress.
GestureLongPressEndCallback = void Function(LongPressEndDetails details)
Callback signature for LongPressGestureRecognizer.onLongPressEnd.
GestureLongPressMoveUpdateCallback = void Function(LongPressMoveUpdateDetails details)
Callback signature for LongPressGestureRecognizer.onLongPressMoveUpdate.
GestureLongPressStartCallback = void Function(LongPressStartDetails details)
Callback signature for LongPressGestureRecognizer.onLongPressStart.
GestureLongPressUpCallback = void Function()
Callback signature for LongPressGestureRecognizer.onLongPressUp.
GestureRecognizerFactoryConstructor<T extends GestureRecognizer> = T Function()
Signature for closures that implement GestureRecognizerFactory.constructor.
GestureRecognizerFactoryInitializer<T extends GestureRecognizer> = void Function(T instance)
Signature for closures that implement GestureRecognizerFactory.initializer.
GestureScaleEndCallback = void Function(ScaleEndDetails details)
Signature for when the pointers are no longer in contact with the screen.
GestureScaleStartCallback = void Function(ScaleStartDetails details)
Signature for when the pointers in contact with the screen have established a focal point and initial scale of 1.0.
GestureScaleUpdateCallback = void Function(ScaleUpdateDetails details)
Signature for when the pointers in contact with the screen have indicated a new focal point and/or scale.
GestureSwipeCallback = void Function(SwipeDetails details)
GestureSwipeCancelCallback = void Function()
GestureTapCallback = void Function()
Signature for when a tap has occurred.
GestureTapCancelCallback = void Function()
Signature for when the pointer that previously triggered a GestureTapDownCallback will not end up causing a tap.
GestureTapDownCallback = void Function(TapDownDetails details)
Signature for when a pointer that might cause a tap has contacted the screen.
GestureTapUpCallback = void Function(TapUpDetails details)
Signature for when a pointer that will trigger a tap has stopped contacting the screen.
IsAcceptedDragCallback = bool Function(AxisDirection direction)
ScrollListener = void Function(double scrollOffset, AxisDirection axisDirection)
TouchEventListener = void Function(TouchEvent event)