BarTransitions.java revision c2beef51306e8916f481218c449b9759ce017c09 
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 boolean HIGH_END = ActivityManager.isHighEndGfx();
45
46    public static final int MODE_OPAQUE = 0;
47    public static final int MODE_SEMI_TRANSPARENT = 1;
48    public static final int MODE_TRANSLUCENT = 2;
49    public static final int MODE_LIGHTS_OUT = 3;
50    public static final int MODE_TRANSPARENT = 4;
51    public static final int MODE_WARNING = 5;
52    public static final int MODE_LIGHTS_OUT_TRANSPARENT = 6;
53
54    public static final int LIGHTS_IN_DURATION = 250;
55    public static final int LIGHTS_OUT_DURATION = 750;
56    public static final int BACKGROUND_DURATION = 200;
57
58    private final String mTag;
59    private final View mView;
60    private final BarBackgroundDrawable mBarBackground;
61
62    private int mMode;
63    private boolean mAlwaysOpaque = false;
64
65    public BarTransitions(View view, int gradientResourceId) {
66        mTag = "BarTransitions." + view.getClass().getSimpleName();
67        mView = view;
68        mBarBackground = new BarBackgroundDrawable(mView.getContext(), gradientResourceId);
69        if (HIGH_END) {
70            mView.setBackground(mBarBackground);
71        }
72    }
73
74    public int getMode() {
75        return mMode;
76    }
77
78    public void setAutoDim(boolean autoDim) {
79        // Default is don't care.
80    }
81
82    /**
83     * @param alwaysOpaque if {@code true}, the bar's background will always be opaque, regardless
84     *         of what mode it is currently set to.
85     */
86    public void setAlwaysOpaque(boolean alwaysOpaque) {
87        mAlwaysOpaque = alwaysOpaque;
88    }
89
90    public boolean isAlwaysOpaque() {
91        // Low-end devices do not support translucent modes, fallback to opaque
92        return !HIGH_END || mAlwaysOpaque;
93    }
94
95    public void transitionTo(int mode, boolean animate) {
96        if (isAlwaysOpaque() && (mode == MODE_SEMI_TRANSPARENT || mode == MODE_TRANSLUCENT
97                || mode == MODE_TRANSPARENT)) {
98            mode = MODE_OPAQUE;
99        }
100        if (isAlwaysOpaque() && (mode == MODE_LIGHTS_OUT_TRANSPARENT)) {
101            mode = MODE_LIGHTS_OUT;
102        }
103        if (mMode == mode) return;
104        int oldMode = mMode;
105        mMode = mode;
106        if (DEBUG) Log.d(mTag, String.format("%s -> %s animate=%s",
107                modeToString(oldMode), modeToString(mode),  animate));
108        onTransition(oldMode, mMode, animate);
109    }
110
111    protected void onTransition(int oldMode, int newMode, boolean animate) {
112        if (HIGH_END) {
113            applyModeBackground(oldMode, newMode, animate);
114        }
115    }
116
117    protected void applyModeBackground(int oldMode, int newMode, boolean animate) {
118        if (DEBUG) Log.d(mTag, String.format("applyModeBackground oldMode=%s newMode=%s animate=%s",
119                modeToString(oldMode), modeToString(newMode), animate));
120        mBarBackground.applyModeBackground(oldMode, newMode, animate);
121    }
122
123    public static String modeToString(int mode) {
124        if (mode == MODE_OPAQUE) return "MODE_OPAQUE";
125        if (mode == MODE_SEMI_TRANSPARENT) return "MODE_SEMI_TRANSPARENT";
126        if (mode == MODE_TRANSLUCENT) return "MODE_TRANSLUCENT";
127        if (mode == MODE_LIGHTS_OUT) return "MODE_LIGHTS_OUT";
128        if (mode == MODE_TRANSPARENT) return "MODE_TRANSPARENT";
129        if (mode == MODE_WARNING) return "MODE_WARNING";
130        if (mode == MODE_LIGHTS_OUT_TRANSPARENT) return "MODE_LIGHTS_OUT_TRANSPARENT";
131        throw new IllegalArgumentException("Unknown mode " + mode);
132    }
133
134    public void finishAnimations() {
135        mBarBackground.finishAnimation();
136    }
137
138    protected boolean isLightsOut(int mode) {
139        return mode == MODE_LIGHTS_OUT || mode == MODE_LIGHTS_OUT_TRANSPARENT;
140    }
141
142    private static class BarBackgroundDrawable extends Drawable {
143        private final int mOpaque;
144        private final int mSemiTransparent;
145        private final int mTransparent;
146        private final int mWarning;
147        private final Drawable mGradient;
148
149        private int mMode = -1;
150        private boolean mAnimating;
151        private long mStartTime;
152        private long mEndTime;
153
154        private int mGradientAlpha;
155        private int mColor;
156        private PorterDuffColorFilter mTintFilter;
157        private Paint mPaint = new Paint();
158
159        private int mGradientAlphaStart;
160        private int mColorStart;
161
162
163        public BarBackgroundDrawable(Context context, int gradientResourceId) {
164            final Resources res = context.getResources();
165            if (DEBUG_COLORS) {
166                mOpaque = 0xff0000ff;
167                mSemiTransparent = 0x7f0000ff;
168                mTransparent = 0x2f0000ff;
169                mWarning = 0xffff0000;
170            } else {
171                mOpaque = context.getColor(R.color.system_bar_background_opaque);
172                mSemiTransparent = context.getColor(
173                        com.android.internal.R.color.system_bar_background_semi_transparent);
174                mTransparent = context.getColor(R.color.system_bar_background_transparent);
175                mWarning = Utils.getColorAttr(context, android.R.attr.colorError);
176            }
177            mGradient = context.getDrawable(gradientResourceId);
178        }
179
180        @Override
181        public void setAlpha(int alpha) {
182            // noop
183        }
184
185        @Override
186        public void setColorFilter(ColorFilter colorFilter) {
187            // noop
188        }
189
190        @Override
191        public void setTint(int color) {
192            if (mTintFilter == null) {
193                mTintFilter = new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_IN);
194            } else {
195                mTintFilter.setColor(color);
196            }
197            invalidateSelf();
198        }
199
200        @Override
201        public void setTintMode(Mode tintMode) {
202            if (mTintFilter == null) {
203                mTintFilter = new PorterDuffColorFilter(0, tintMode);
204            } else {
205                mTintFilter.setMode(tintMode);
206            }
207            invalidateSelf();
208        }
209
210        @Override
211        protected void onBoundsChange(Rect bounds) {
212            super.onBoundsChange(bounds);
213            mGradient.setBounds(bounds);
214        }
215
216        public void applyModeBackground(int oldMode, int newMode, boolean animate) {
217            if (mMode == newMode) return;
218            mMode = newMode;
219            mAnimating = animate;
220            if (animate) {
221                long now = SystemClock.elapsedRealtime();
222                mStartTime = now;
223                mEndTime = now + BACKGROUND_DURATION;
224                mGradientAlphaStart = mGradientAlpha;
225                mColorStart = mColor;
226            }
227            invalidateSelf();
228        }
229
230        @Override
231        public int getOpacity() {
232            return PixelFormat.TRANSLUCENT;
233        }
234
235        public void finishAnimation() {
236            if (mAnimating) {
237                mAnimating = false;
238                invalidateSelf();
239            }
240        }
241
242        @Override
243        public void draw(Canvas canvas) {
244            int targetGradientAlpha = 0, targetColor = 0;
245            if (mMode == MODE_WARNING) {
246                targetColor = mWarning;
247            } else if (mMode == MODE_TRANSLUCENT) {
248                targetColor = mSemiTransparent;
249            } else if (mMode == MODE_SEMI_TRANSPARENT) {
250                targetColor = mSemiTransparent;
251            } else if (mMode == MODE_TRANSPARENT || mMode == MODE_LIGHTS_OUT_TRANSPARENT) {
252                targetColor = mTransparent;
253            } else {
254                targetColor = mOpaque;
255            }
256
257            if (!mAnimating) {
258                mColor = targetColor;
259                mGradientAlpha = targetGradientAlpha;
260            } else {
261                final long now = SystemClock.elapsedRealtime();
262                if (now >= mEndTime) {
263                    mAnimating = false;
264                    mColor = targetColor;
265                    mGradientAlpha = targetGradientAlpha;
266                } else {
267                    final float t = (now - mStartTime) / (float)(mEndTime - mStartTime);
268                    final float v = Math.max(0, Math.min(
269                            Interpolators.LINEAR.getInterpolation(t), 1));
270                    mGradientAlpha = (int)(v * targetGradientAlpha + mGradientAlphaStart * (1 - v));
271                    mColor = Color.argb(
272                          (int)(v * Color.alpha(targetColor) + Color.alpha(mColorStart) * (1 - v)),
273                          (int)(v * Color.red(targetColor) + Color.red(mColorStart) * (1 - v)),
274                          (int)(v * Color.green(targetColor) + Color.green(mColorStart) * (1 - v)),
275                          (int)(v * Color.blue(targetColor) + Color.blue(mColorStart) * (1 - v)));
276                }
277            }
278            if (mGradientAlpha > 0) {
279                mGradient.setAlpha(mGradientAlpha);
280                mGradient.draw(canvas);
281            }
282            if (Color.alpha(mColor) > 0) {
283                mPaint.setColor(mColor);
284                if (mTintFilter != null) {
285                    mPaint.setColorFilter(mTintFilter);
286                }
287                canvas.drawPaint(mPaint);
288            }
289            if (mAnimating) {
290                invalidateSelf();  // keep going
291            }
292        }
293    }
294}
295