DragGestureRecognizer class
Recognizes drag gestures.
A drag starts when the pointer moves beyond kDragSlop cells from the initial down position. Once started, onDragStart fires, followed by onDragUpdate for each subsequent movement, and onDragEnd on pointer release.
- Inheritance
-
- Object
- GestureRecognizer
- DragGestureRecognizer
Constructors
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- initialPosition ↔ Offset?
-
Position where the pointer first went down.
getter/setter pairinherited
- onDragEnd ↔ GestureDragEndCallback?
-
Callback fired when the drag ends (pointer released).
getter/setter pair
- onDragStart ↔ GestureDragStartCallback?
-
Callback fired when the drag begins (pointer moved beyond slop).
getter/setter pair
- onDragUpdate ↔ GestureDragUpdateCallback?
-
Callback fired for each pointer movement during the drag.
getter/setter pair
-
pendingCmds
→ List<
Cmd> -
Commands accumulated from callbacks during the current event.
finalinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- state ↔ GestureRecognizerState
-
Current lifecycle state.
getter/setter pairinherited
Methods
-
acceptGesture(
) → void -
Called when this recognizer wins the arena.
override
-
addCmd(
Cmd? cmd) → void -
Adds a command to pendingCmds if non-null.
inherited
-
dispose(
) → void -
Cleans up resources. Called when the recognizer is no longer needed.
inherited
-
handlePointerDown(
MouseMsg event, Offset localPosition) → void -
Called when a pointer-down event occurs.
override
-
handlePointerMove(
MouseMsg event, Offset localPosition) → void -
Called when a pointer-move event occurs.
override
-
handlePointerUp(
MouseMsg event, Offset localPosition) → void -
Called when a pointer-up event occurs.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
rejectGesture(
) → void -
Called when this recognizer loses the arena.
override
-
reset(
) → void -
Resets the recognizer to GestureRecognizerState.ready.
override
-
resolve(
GestureDisposition disposition) → void -
Requests acceptance or rejection from the arena.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited