BarTransitions.java revision def8c8da6c32b1f0c9607f6563b93a1702178056 
1/*
2 * Copyright (C) 2013 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.app.ActivityManager;
20import android.content.Context;
21import android.content.res.Resources;
22import android.graphics.Canvas;
23import android.graphics.Color;
24import android.graphics.ColorFilter;
25import android.graphics.Paint;
26import android.graphics.PixelFormat;
27import android.graphics.PorterDuff;
28import android.graphics.PorterDuffColorFilter;
29import android.graphics.Rect;
30import android.graphics.PorterDuff.Mode;
31import android.graphics.drawable.Drawable;
32import android.os.SystemClock;
33import android.util.Log;
34import android.view.View;
35
36import com.android.settingslib.Utils;
37import com.android.systemui.Interpolators;
38import com.android.systemui.R;
39
40public class BarTransitions {
41    private static final boolean DEBUG = false;
42    private static final boolean DEBUG_COLORS = false;
43
44    public static final int MODE_OPAQUE = 0;
45    public static final int MODE_SEMI_TRANSPARENT = 1;
46    public static final int MODE_TRANSLUCENT = 2;
47    public static final int MODE_LIGHTS_OUT = 3;
48    public static final int MODE_TRANSPARENT = 4;
49    public static final int MODE_WARNING = 5;
50    public static final int MODE_LIGHTS_OUT_TRANSPARENT = 6;
51
52    public static final int LIGHTS_IN_DURATION = 250;
53    public static final int LIGHTS_OUT_DURATION = 1500;
54    public static final int BACKGROUND_DURATION = 200;
55
56    private final String mTag;
57    private final View mView;
58    private final BarBackgroundDrawable mBarBackground;
59
60    private int mMode;
61    private boolean mAlwaysOpaque = false;
62
63    public BarTransitions(View view, int gradientResourceId) {
64        mTag = "BarTransitions." + view.getClass().getSimpleName();
65        mView = view;
66        mBarBackground = new BarBackgroundDrawable(mView.getContext(), gradientResourceId);
67        mView.setBackground(mBarBackground);
68    }
69
70    public int getMode() {
71        return mMode;
72    }
73
74    public void setAutoDim(boolean autoDim) {
75        // Default is don't care.
76    }
77
78    /**
79     * @param alwaysOpaque if {@code true}, the bar's background will always be opaque, regardless
80     *         of what mode it is currently set to.
81     */
82    public void setAlwaysOpaque(boolean alwaysOpaque) {
83        mAlwaysOpaque = alwaysOpaque;
84    }
85
86    public boolean isAlwaysOpaque() {
87        // Low-end devices do not support translucent modes, fallback to opaque
88        return mAlwaysOpaque;
89    }
90
91    public void transitionTo(int mode, boolean animate) {
92        if (isAlwaysOpaque() && (mode == MODE_SEMI_TRANSPARENT || mode == MODE_TRANSLUCENT
93                || mode == MODE_TRANSPARENT)) {
94            mode = MODE_OPAQUE;
95        }
96        if (isAlwaysOpaque() && (mode == MODE_LIGHTS_OUT_TRANSPARENT)) {
97            mode = MODE_LIGHTS_OUT;
98        }
99        if (mMode == mode) return;
100        int oldMode = mMode;
101        mMode = mode;
102        if (DEBUG) Log.d(mTag, String.format("%s -> %s animate=%s",
103                modeToString(oldMode), modeToString(mode),  animate));
104        onTransition(oldMode, mMode, animate);
105    }
106
107    protected void onTransition(int oldMode, int newMode, boolean animate) {
108        applyModeBackground(oldMode, newMode, animate);
109    }
110
111    protected void applyModeBackground(int oldMode, int newMode, boolean animate) {
112        if (DEBUG) Log.d(mTag, String.format("applyModeBackground oldMode=%s newMode=%s animate=%s",
113                modeToString(oldMode), modeToString(newMode), animate));
114        mBarBackground.applyModeBackground(oldMode, newMode, animate);
115    }
116
117    public static String modeToString(int mode) {
118        if (mode == MODE_OPAQUE) return "MODE_OPAQUE";
119        if (mode == MODE_SEMI_TRANSPARENT) return "MODE_SEMI_TRANSPARENT";
120        if (mode == MODE_TRANSLUCENT) return "MODE_TRANSLUCENT";
121        if (mode == MODE_LIGHTS_OUT) return "MODE_LIGHTS_OUT";
122        if (mode == MODE_TRANSPARENT) return "MODE_TRANSPARENT";
123        if (mode == MODE_WARNING) return "MODE_WARNING";
124        if (mode == MODE_LIGHTS_OUT_TRANSPARENT) return "MODE_LIGHTS_OUT_TRANSPARENT";
125        throw new IllegalArgumentException("Unknown mode " + mode);
126    }
127
128    public void finishAnimations() {
129        mBarBackground.finishAnimation();
130    }
131
132    protected boolean isLightsOut(int mode) {
133        return mode == MODE_LIGHTS_OUT || mode == MODE_LIGHTS_OUT_TRANSPARENT;
134    }
135
136    private static class BarBackgroundDrawable extends Drawable {
137        private final int mOpaque;
138        private final int mSemiTransparent;
139        private final int mTransparent;
140        private final int mWarning;
141        private final Drawable mGradient;
142
143        private int mMode = -1;
144        private boolean mAnimating;
145        private long mStartTime;
146        private long mEndTime;
147
148        private int mGradientAlpha;
149        private int mColor;
150        private PorterDuffColorFilter mTintFilter;
151        private Paint mPaint = new Paint();
152
153        private int mGradientAlphaStart;
154        private int mColorStart;
155
156
157        public BarBackgroundDrawable(Context context, int gradientResourceId) {
158            final Resources res = context.getResources();
159            if (DEBUG_COLORS) {
160                mOpaque = 0xff0000ff;
161                mSemiTransparent = 0x7f0000ff;
162                mTransparent = 0x2f0000ff;
163                mWarning = 0xffff0000;
164            } else {
165                mOpaque = context.getColor(R.color.system_bar_background_opaque);
166                mSemiTransparent = context.getColor(
167                        com.android.internal.R.color.system_bar_background_semi_transparent);
168                mTransparent = context.getColor(R.color.system_bar_background_transparent);
169                mWarning = Utils.getColorAttr(context, android.R.attr.colorError);
170            }
171            mGradient = context.getDrawable(gradientResourceId);
172        }
173
174        @Override
175        public void setAlpha(int alpha) {
176            // noop
177        }
178
179        @Override
180        public void setColorFilter(ColorFilter colorFilter) {
181            // noop
182        }
183
184        @Override
185        public void setTint(int color) {
186            if (mTintFilter == null) {
187                mTintFilter = new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_IN);
188            } else {
189                mTintFilter.setColor(color);
190            }
191            invalidateSelf();
192        }
193
194        @Override
195        public void setTintMode(Mode tintMode) {
196            if (mTintFilter == null) {
197                mTintFilter = new PorterDuffColorFilter(0, tintMode);
198            } else {
199                mTintFilter.setMode(tintMode);
200            }
201            invalidateSelf();
202        }
203
204        @Override
205        protected void onBoundsChange(Rect bounds) {
206            super.onBoundsChange(bounds);
207            mGradient.setBounds(bounds);
208        }
209
210        public void applyModeBackground(int oldMode, int newMode, boolean animate) {
211            if (mMode == newMode) return;
212            mMode = newMode;
213            mAnimating = animate;
214            if (animate) {
215                long now = SystemClock.elapsedRealtime();
216                mStartTime = now;
217                mEndTime = now + BACKGROUND_DURATION;
218                mGradientAlphaStart = mGradientAlpha;
219                mColorStart = mColor;
220            }
221            invalidateSelf();
222        }
223
224        @Override
225        public int getOpacity() {
226            return PixelFormat.TRANSLUCENT;
227        }
228
229        public void finishAnimation() {
230            if (mAnimating) {
231                mAnimating = false;
232                invalidateSelf();
233            }
234        }
235
236        @Override
237        public void draw(Canvas canvas) {
238            int targetGradientAlpha = 0, targetColor = 0;
239            if (mMode == MODE_WARNING) {
240                targetColor = mWarning;
241            } else if (mMode == MODE_TRANSLUCENT) {
242                targetColor = mSemiTransparent;
243            } else if (mMode == MODE_SEMI_TRANSPARENT) {
244                targetColor = mSemiTransparent;
245            } else if (mMode == MODE_TRANSPARENT || mMode == MODE_LIGHTS_OUT_TRANSPARENT) {
246                targetColor = mTransparent;
247            } else {
248                targetColor = mOpaque;
249            }
250
251            if (!mAnimating) {
252                mColor = targetColor;
253                mGradientAlpha = targetGradientAlpha;
254            } else {
255                final long now = SystemClock.elapsedRealtime();
256                if (now >= mEndTime) {
257                    mAnimating = false;
258                    mColor = targetColor;
259                    mGradientAlpha = targetGradientAlpha;
260                } else {
261                    final float t = (now - mStartTime) / (float)(mEndTime - mStartTime);
262                    final float v = Math.max(0, Math.min(
263                            Interpolators.LINEAR.getInterpolation(t), 1));
264                    mGradientAlpha = (int)(v * targetGradientAlpha + mGradientAlphaStart * (1 - v));
265                    mColor = Color.argb(
266                          (int)(v * Color.alpha(targetColor) + Color.alpha(mColorStart) * (1 - v)),
267                          (int)(v * Color.red(targetColor) + Color.red(mColorStart) * (1 - v)),
268                          (int)(v * Color.green(targetColor) + Color.green(mColorStart) * (1 - v)),
269                          (int)(v * Color.blue(targetColor) + Color.blue(mColorStart) * (1 - v)));
270                }
271            }
272            if (mGradientAlpha > 0) {
273                mGradient.setAlpha(mGradientAlpha);
274                mGradient.draw(canvas);
275            }
276            if (Color.alpha(mColor) > 0) {
277                mPaint.setColor(mColor);
278                if (mTintFilter != null) {
279                    mPaint.setColorFilter(mTintFilter);
280                }
281                canvas.drawPaint(mPaint);
282            }
283            if (mAnimating) {
284                invalidateSelf();  // keep going
285            }
286        }
287    }
288}
289