PhoneStatusBarView.java revision d309056d36759446c91ff5c1e17a217bfa4fdcfb 
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.phone;
18
19import android.content.Context;
20import android.content.res.Configuration;
21import android.graphics.Canvas;
22import android.graphics.Rect;
23import android.os.SystemClock;
24import android.util.AttributeSet;
25import android.view.MotionEvent;
26import android.view.View;
27import android.view.ViewGroup;
28import android.view.ViewParent;
29import android.view.accessibility.AccessibilityEvent;
30import android.widget.FrameLayout;
31
32import com.android.systemui.R;
33import com.android.systemui.statusbar.policy.FixedSizeDrawable;
34
35public class PhoneStatusBarView extends FrameLayout {
36    private static final String TAG = "PhoneStatusBarView";
37
38    static final int DIM_ANIM_TIME = 400;
39
40    PhoneStatusBar mService;
41    boolean mTracking;
42    int mStartX, mStartY;
43    ViewGroup mNotificationIcons;
44    ViewGroup mStatusIcons;
45
46    boolean mNightMode = false;
47    int mStartAlpha = 0, mEndAlpha = 0;
48    long mEndTime = 0;
49
50    Rect mButtonBounds = new Rect();
51    boolean mCapturingEvents = true;
52
53    public PhoneStatusBarView(Context context, AttributeSet attrs) {
54        super(context, attrs);
55    }
56
57    @Override
58    protected void onFinishInflate() {
59        super.onFinishInflate();
60        mNotificationIcons = (ViewGroup)findViewById(R.id.notificationIcons);
61        mStatusIcons = (ViewGroup)findViewById(R.id.statusIcons);
62    }
63
64    @Override
65    protected void onAttachedToWindow() {
66        super.onAttachedToWindow();
67        mService.onBarViewAttached();
68    }
69
70    @Override
71    protected void onConfigurationChanged(Configuration newConfig) {
72        super.onConfigurationChanged(newConfig);
73        mService.updateDisplaySize();
74        boolean nightMode = (newConfig.uiMode & Configuration.UI_MODE_NIGHT_MASK)
75                == Configuration.UI_MODE_NIGHT_YES;
76        if (mNightMode != nightMode) {
77            mNightMode = nightMode;
78            mStartAlpha = getCurAlpha();
79            mEndAlpha = mNightMode ? 0x80 : 0x00;
80            mEndTime = SystemClock.uptimeMillis() + DIM_ANIM_TIME;
81            invalidate();
82        }
83    }
84
85    int getCurAlpha() {
86        long time = SystemClock.uptimeMillis();
87        if (time > mEndTime) {
88            return mEndAlpha;
89        }
90        return mEndAlpha
91                - (int)(((mEndAlpha-mStartAlpha) * (mEndTime-time) / DIM_ANIM_TIME));
92    }
93
94    @Override
95    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
96        super.onSizeChanged(w, h, oldw, oldh);
97        mService.updateExpandedViewPos(PhoneStatusBar.EXPANDED_LEAVE_ALONE);
98    }
99
100    @Override
101    protected void onLayout(boolean changed, int l, int t, int r, int b) {
102        super.onLayout(changed, l, t, r, b);
103    }
104
105    @Override
106    protected void dispatchDraw(Canvas canvas) {
107        super.dispatchDraw(canvas);
108        int alpha = getCurAlpha();
109        if (alpha != 0) {
110            canvas.drawARGB(alpha, 0, 0, 0);
111        }
112        if (alpha != mEndAlpha) {
113            invalidate();
114        }
115    }
116
117    /**
118     * Gets the left position of v in this view.  Throws if v is not
119     * a child of this.
120     */
121    private int getViewOffset(View v) {
122        int offset = 0;
123        while (v != this) {
124            offset += v.getLeft();
125            ViewParent p = v.getParent();
126            if (v instanceof View) {
127                v = (View)p;
128            } else {
129                throw new RuntimeException(v + " is not a child of " + this);
130            }
131        }
132        return offset;
133    }
134
135    /**
136     * Ensure that, if there is no target under us to receive the touch,
137     * that we process it ourself.  This makes sure that onInterceptTouchEvent()
138     * is always called for the entire gesture.
139     */
140    @Override
141    public boolean onTouchEvent(MotionEvent event) {
142        if (!mCapturingEvents) {
143            return false;
144        }
145        if (event.getAction() != MotionEvent.ACTION_DOWN) {
146            mService.interceptTouchEvent(event);
147        }
148        return true;
149    }
150
151    @Override
152    public boolean onInterceptTouchEvent(MotionEvent event) {
153        if (event.getAction() == MotionEvent.ACTION_DOWN) {
154            if (mButtonBounds.contains((int)event.getX(), (int)event.getY())) {
155                mCapturingEvents = false;
156                return false;
157            }
158        }
159        mCapturingEvents = true;
160        return mService.interceptTouchEvent(event)
161                ? true : super.onInterceptTouchEvent(event);
162    }
163
164    @Override
165    public boolean onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) {
166        if (super.onRequestSendAccessibilityEvent(child, event)) {
167            // The status bar is very small so augment the view that the user is touching
168            // with the content of the status bar a whole. This way an accessibility service
169            // may announce the current item as well as the entire content if appropriate.
170            AccessibilityEvent record = AccessibilityEvent.obtain();
171            onInitializeAccessibilityEvent(record);
172            dispatchPopulateAccessibilityEvent(record);
173            event.appendRecord(record);
174            return true;
175        }
176        return false;
177    }
178}
179