XGestureDetector class

A widget that detects gestures.

  • Supports Tap, DoubleTap, Move(start, update, end), Scale(start, update, end) and Long Press
  • All callbacks be used simultaneously

For handle rotate event, please use rotateAngle on onScaleUpdate.

Inheritance

Constructors

XGestureDetector.new({required Widget child, TapEventListener? onTap, MoveEventListener? onMoveUpdate, MoveEventListener? onMoveEnd, MoveEventListener? onMoveStart, void onScaleStart(Offset initialFocusPoint)?, ScaleEventListener? onScaleUpdate, void onScaleEnd()?, TapEventListener? onDoubleTap, dynamic onScrollEvent(ScrollEvent event)?, bool bypassMoveEventAfterLongPress = true, bool bypassTapEventOnDoubleTap = false, int doubleTapTimeConsider = 250, int longPressTimeConsider = 350, TapEventListener? onLongPress, MoveEventListener? onLongPressMove, dynamic onLongPressEnd()?, HitTestBehavior behavior = HitTestBehavior.deferToChild, int longPressMaximumRangeAllowed = 25})
Creates a widget that detects gestures.

Properties

behavior → HitTestBehavior
How to behave during hit testing.
final
bypassMoveEventAfterLongPress → bool
by default it is true, means after receive long press event without release pointer (finger still touch on screen) the move event will be ignore.
final
bypassTapEventOnDoubleTap → bool
a flag to enable/disable tap event when double tap event occurs.
final
child → Widget
The widget below this widget in the tree.
final
doubleTapTimeConsider → int
A specific duration to detect double tap
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
longPressMaximumRangeAllowed → int
The maxium distance between the first touching position and the position when the long press event occurs. default: distanceSquared = 25
final
longPressTimeConsider → int
A specific duration to detect long press
final
onDoubleTap → TapEventListener?
The user has tapped the screen at the same location twice in quick succession.
final
onLongPress → TapEventListener?
A pointer has remained in contact with the screen at the same location for a long period of time
final
onLongPressEnd → dynamic Function()?
The pointer are no longer in contact with the screen after onLongPress event.
final
onLongPressMove → MoveEventListener?
The pointer in the long press state and then made a move
final
onMoveEnd → MoveEventListener?
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.
final
onMoveStart → MoveEventListener?
A pointer has contacted the screen with a primary button and has begun to move.
final
onMoveUpdate → MoveEventListener?
A pointer that is in contact with the screen with a primary button and made a move
final
onScaleEnd → void Function()?
The pointers are no longer in contact with the screen.
final
onScaleStart → void Function(Offset initialFocusPoint)?
The pointers in contact with the screen have established a focal point and initial scale of 1.0.
final
onScaleUpdate → ScaleEventListener?
The pointers in contact with the screen have indicated a new focal point and/or scale.
final
onScrollEvent → dynamic Function(ScrollEvent event)?
The callback for scroll event
final
onTap → TapEventListener?
The pointer that previously triggered the onTapDown has also triggered onTapUp which ends up causing a tap.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _XGestureDetectorState
Creates the mutable state for this widget at a given location in the tree.
override
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
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
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, int wrapWidth = 65}) → 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 short, textual description of this widget.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited