PinchGestureRecognizer

Page Summary

• PinchGestureRecognizer detects two-finger pinch motions on a touchscreen for use in AR interactions.

• It provides a listener, OnGestureStartedListener, to react when a pinch gesture begins.

• The tryCreateGestures method is used internally to handle touch events and identify potential pinch gestures.

• This class inherits functionalities from BaseGestureRecognizer for managing gestures.

• You can use this class to implement interactive scaling or zooming functionalities in your AR applications by responding to the pinch events.

public class PinchGestureRecognizer

Gesture Recognizer for when the user performs a two-finger pinch motion on the touch screen.

Nested Classes

interface

PinchGestureRecognizer.OnGestureStartedListener

Interface definition for a callbacks to be invoked when a PinchGesture starts.

Inherited Fields

From class com.google.ar.sceneform.ux.BaseGestureRecognizer

protected final GesturePointersUtility	gesturePointersUtility
protected final ArrayList<T extends BaseGesture<T>>	gestures

Public Constructors

PinchGestureRecognizer(GesturePointersUtility gesturePointersUtility)

Protected Methods

void	tryCreateGestures(HitTestResult hitTestResult, MotionEvent motionEvent)

Inherited Methods

From class com.google.ar.sceneform.ux.BaseGestureRecognizer

void	addOnGestureStartedListener(OnGestureStartedListener<PinchGesture> listener)
void	onTouch(HitTestResult hitTestResult, MotionEvent motionEvent)
void	removeOnGestureStartedListener(OnGestureStartedListener<PinchGesture> listener)
abstract void	tryCreateGestures(HitTestResult hitTestResult, MotionEvent motionEvent)

From class java.lang.Object

Object	clone()
boolean	equals(Object arg0)
void	finalize()
final Class<?>	getClass()
int	hashCode()
final void	notify()
final void	notifyAll()
String	toString()
final void	wait(long arg0, int arg1)
final void	wait(long arg0)
final void	wait()

Public Constructors

public PinchGestureRecognizer (GesturePointersUtility gesturePointersUtility)

Parameters

gesturePointersUtility

Protected Methods

protected void tryCreateGestures (HitTestResult hitTestResult, MotionEvent motionEvent)

Parameters

hitTestResult
motionEvent