Android
android.view
public class

android.view.TouchDelegate

java.lang.Object
android.view.TouchDelegate

Helper class to handle situations where you want a view to have a larger touch area than its actual view bounds. The view whose touch area is changed is called the delegate view. This class should be used by an ancestor of the delegate. To use a TouchDelegate, first create an instance that specifies the bounds that should be mapped to the delegate and the delegate view itself.

The ancestor should then forward all of its touch events received in its onTouchEvent(MotionEvent) to onTouchEvent(MotionEvent).

Summary

Constants

      Value  
int  ABOVE  The touchable region of the View extends above its actual extent.  0x00000001 
int  BELOW  The touchable region of the View extends below its actual extent.  0x00000002 
int  TO_LEFT  The touchable region of the View extends to the left of its actual extent.  0x00000004 
int  TO_RIGHT  The touchable region of the View extends to the right of its actual extent.  0x00000008 

Public Constructors

            TouchDelegate(Rect bounds, View delegateView)
Constructor

Public Methods

          boolean  onTouchEvent(MotionEvent event)
Will forward touch events to the delegate view if the event is within the bounds specified in the constructor.
Methods inherited from class java.lang.Object

Details

Constants

public static final int ABOVE

The touchable region of the View extends above its actual extent.
Constant Value: 1 (0x00000001)

public static final int BELOW

The touchable region of the View extends below its actual extent.
Constant Value: 2 (0x00000002)

public static final int TO_LEFT

The touchable region of the View extends to the left of its actual extent.
Constant Value: 4 (0x00000004)

public static final int TO_RIGHT

The touchable region of the View extends to the right of its actual extent.
Constant Value: 8 (0x00000008)

Public Constructors

public TouchDelegate(Rect bounds, View delegateView)

Constructor

Parameters

bounds Bounds in local coordinates of the containing view that should be mapped to the delegate view
delegateView The view that should receive motion events

Public Methods

public boolean onTouchEvent(MotionEvent event)

Will forward touch events to the delegate view if the event is within the bounds specified in the constructor.

Parameters

event The touch event to forward

Returns

  • True if the event was forwarded to the delegate, false otherwise.
Copyright 2007 Google Inc. Build 0.9_r1-98467 - 14 Aug 2008 18:56