DragGesture

  • DragGesture is a class in Sceneform that detects and handles user drag motions on the touchscreen.

  • It provides methods to get the drag delta (getDelta) and current position (getPosition) of the drag gesture.

  • Developers can use the OnGestureEventListener interface to receive callbacks during the drag gesture lifecycle (start, update, finish, cancel).

  • DragGesture inherits from BaseGesture and provides its own implementations for gesture handling.
public class DragGesture

Gesture for when the user performs a drag motion on the touch screen.

Nested Classes

interface DragGesture.OnGestureEventListener Interface definition for callbacks to be invoked by a DragGesture. 

Inherited Fields

Public Constructors

DragGesture(GesturePointersUtility gesturePointersUtility, HitTestResult hitTestResult, MotionEvent motionEvent)

Public Methods

Vector3
getDelta()
Vector3
getPosition()

Protected Methods

boolean
canStart(HitTestResult hitTestResult, MotionEvent motionEvent)
DragGesture
getSelf()
void
onCancel()
void
onFinish()
void
onStart(HitTestResult hitTestResult, MotionEvent motionEvent)
boolean
updateGesture(HitTestResult hitTestResult, MotionEvent motionEvent)

Inherited Methods

Public Constructors

public DragGesture (GesturePointersUtility gesturePointersUtility, HitTestResult hitTestResult, MotionEvent motionEvent)

Parameters
gesturePointersUtility
hitTestResult
motionEvent

Public Methods

public Vector3 getDelta ()

public Vector3 getPosition ()

Protected Methods

protected boolean canStart (HitTestResult hitTestResult, MotionEvent motionEvent)

Parameters
hitTestResult
motionEvent

protected DragGesture getSelf ()

protected void onCancel ()

protected void onFinish ()

protected void onStart (HitTestResult hitTestResult, MotionEvent motionEvent)

Parameters
hitTestResult
motionEvent

protected boolean updateGesture (HitTestResult hitTestResult, MotionEvent motionEvent)

Parameters
hitTestResult
motionEvent