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
17package com.android.internal.widget;
18
19import android.content.Context;
20import android.graphics.Rect;
21import android.util.AttributeSet;
22import android.view.View;
23import android.view.MotionEvent;
24import 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 */
34public class LinearLayoutWithDefaultTouchRecepient extends LinearLayout {
35
36    private final Rect mTempRect = new Rect();
37    private View mDefaultTouchRecepient;
38
39    public LinearLayoutWithDefaultTouchRecepient(Context context) {
40        super(context);
41    }
42
43    public LinearLayoutWithDefaultTouchRecepient(Context context, AttributeSet attrs) {
44        super(context, attrs);
45    }
46
47    public void setDefaultTouchRecepient(View defaultTouchRecepient) {
48        mDefaultTouchRecepient = defaultTouchRecepient;
49    }
50
51    @Override
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