KeyButtonView.java revision 5ee1a3daf0fb274b2a5fdea797748b569495a621 
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.systemui.statusbar.policy;
18
19import android.content.Context;
20import android.content.res.TypedArray;
21import android.graphics.drawable.AnimationDrawable;
22import android.graphics.drawable.Drawable;
23import android.os.RemoteException;
24import android.os.SystemClock;
25import android.os.ServiceManager;
26import android.util.AttributeSet;
27import android.util.Slog;
28import android.view.accessibility.AccessibilityEvent;
29import android.view.HapticFeedbackConstants;
30import android.view.IWindowManager;
31import android.view.InputDevice;
32import android.view.KeyCharacterMap;
33import android.view.KeyEvent;
34import android.view.MotionEvent;
35import android.view.SoundEffectConstants;
36import android.view.ViewConfiguration;
37import android.widget.ImageView;
38import android.widget.RemoteViews.RemoteView;
39
40import com.android.systemui.R;
41
42public class KeyButtonView extends ImageView {
43    private static final String TAG = "StatusBar.KeyButtonView";
44
45    IWindowManager mWindowManager;
46    long mDownTime;
47    boolean mSending;
48    int mCode;
49    int mRepeat;
50    int mTouchSlop;
51
52    Runnable mCheckLongPress = new Runnable() {
53        public void run() {
54            if (isPressed()) {
55                mRepeat++;
56                sendEvent(KeyEvent.ACTION_DOWN,
57                        KeyEvent.FLAG_FROM_SYSTEM
58                        | KeyEvent.FLAG_VIRTUAL_HARD_KEY
59                        | KeyEvent.FLAG_LONG_PRESS);
60
61                sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED);
62                //playSoundEffect(SoundEffectConstants.CLICK);
63            }
64        }
65    };
66
67    public KeyButtonView(Context context, AttributeSet attrs) {
68        this(context, attrs, 0);
69    }
70
71    public KeyButtonView(Context context, AttributeSet attrs, int defStyle) {
72        super(context, attrs);
73
74        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.KeyButtonView,
75                defStyle, 0);
76
77        mCode = a.getInteger(R.styleable.KeyButtonView_keyCode, 0);
78        if (mCode == 0) {
79            Slog.w(TAG, "KeyButtonView without key code id=0x" + Integer.toHexString(getId()));
80        }
81
82        a.recycle();
83
84        mWindowManager = IWindowManager.Stub.asInterface(
85                ServiceManager.getService(Context.WINDOW_SERVICE));
86
87        setClickable(true);
88        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
89    }
90
91    public boolean onTouchEvent(MotionEvent ev) {
92        final int action = ev.getAction();
93        int x, y;
94
95        switch (action) {
96            case MotionEvent.ACTION_DOWN:
97                //Slog.d("KeyButtonView", "press");
98                mDownTime = SystemClock.uptimeMillis();
99                mRepeat = 0;
100                mSending = true;
101                sendEvent(KeyEvent.ACTION_DOWN,
102                        KeyEvent.FLAG_FROM_SYSTEM | KeyEvent.FLAG_VIRTUAL_HARD_KEY, mDownTime);
103                setPressed(true);
104                removeCallbacks(mCheckLongPress);
105                postDelayed(mCheckLongPress, ViewConfiguration.getLongPressTimeout());
106                break;
107            case MotionEvent.ACTION_MOVE:
108                if (mSending) {
109                    x = (int)ev.getX();
110                    y = (int)ev.getY();
111                    setPressed(x >= -mTouchSlop
112                            && x < getWidth() + mTouchSlop
113                            && y >= -mTouchSlop
114                            && y < getHeight() + mTouchSlop);
115                }
116                break;
117            case MotionEvent.ACTION_CANCEL:
118                setPressed(false);
119                if (mSending) {
120                    mSending = false;
121                    sendEvent(KeyEvent.ACTION_UP,
122                            KeyEvent.FLAG_FROM_SYSTEM | KeyEvent.FLAG_VIRTUAL_HARD_KEY
123                                | KeyEvent.FLAG_CANCELED);
124                    removeCallbacks(mCheckLongPress);
125                }
126                break;
127            case MotionEvent.ACTION_UP:
128                final boolean doIt = isPressed();
129                setPressed(false);
130                if (mSending) {
131                    mSending = false;
132                    final int flags = KeyEvent.FLAG_FROM_SYSTEM | KeyEvent.FLAG_VIRTUAL_HARD_KEY;
133                    removeCallbacks(mCheckLongPress);
134                    if (doIt) {
135                        sendEvent(KeyEvent.ACTION_UP, flags);
136                        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
137                        playSoundEffect(SoundEffectConstants.CLICK);
138                    } else {
139                        sendEvent(KeyEvent.ACTION_UP, flags | KeyEvent.FLAG_CANCELED);
140                    }
141                }
142                break;
143        }
144
145        return true;
146    }
147
148    void sendEvent(int action, int flags) {
149        sendEvent(action, flags, SystemClock.uptimeMillis());
150    }
151
152    void sendEvent(int action, int flags, long when) {
153        final KeyEvent ev = new KeyEvent(mDownTime, when, action, mCode, mRepeat,
154                0, KeyCharacterMap.VIRTUAL_KEYBOARD, 0, flags, InputDevice.SOURCE_KEYBOARD);
155        try {
156            //Slog.d(TAG, "injecting event " + ev);
157            mWindowManager.injectInputEventNoWait(ev);
158        } catch (RemoteException ex) {
159            // System process is dead
160        }
161    }
162}
163
164
165