1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.internal.widget; 18 19 import android.content.Context; 20 import android.graphics.Rect; 21 import android.util.AttributeSet; 22 import android.view.View; 23 import android.view.MotionEvent; 24 import android.widget.LinearLayout; 25 26 27 /** 28 * Like a normal linear layout, but supports dispatching all otherwise unhandled 29 * touch events to a particular descendant. This is for the unlock screen, so 30 * that a wider range of touch events than just the lock pattern widget can kick 31 * off a lock pattern if the finger is eventually dragged into the bounds of the 32 * lock pattern view. 33 */ 34 public class LinearLayoutWithDefaultTouchRecepient extends LinearLayout { 35 36 private final Rect mTempRect = new Rect(); 37 private View mDefaultTouchRecepient; 38 LinearLayoutWithDefaultTouchRecepient(Context context)39 public LinearLayoutWithDefaultTouchRecepient(Context context) { 40 super(context); 41 } 42 LinearLayoutWithDefaultTouchRecepient(Context context, AttributeSet attrs)43 public LinearLayoutWithDefaultTouchRecepient(Context context, AttributeSet attrs) { 44 super(context, attrs); 45 } 46 setDefaultTouchRecepient(View defaultTouchRecepient)47 public void setDefaultTouchRecepient(View defaultTouchRecepient) { 48 mDefaultTouchRecepient = defaultTouchRecepient; 49 } 50 51 @Override dispatchTouchEvent(MotionEvent ev)52 public boolean dispatchTouchEvent(MotionEvent ev) { 53 if (mDefaultTouchRecepient == null) { 54 return super.dispatchTouchEvent(ev); 55 } 56 57 if (super.dispatchTouchEvent(ev)) { 58 return true; 59 } 60 mTempRect.set(0, 0, 0, 0); 61 offsetRectIntoDescendantCoords(mDefaultTouchRecepient, mTempRect); 62 ev.setLocation(ev.getX() + mTempRect.left, ev.getY() + mTempRect.top); 63 return mDefaultTouchRecepient.dispatchTouchEvent(ev); 64 } 65 66 } 67