BarTransitions.java revision c0d7058b14c24cd07912f5629c26b39b7b4673d5 
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.PixelFormat;
26import android.graphics.Rect;
27import android.graphics.drawable.Drawable;
28import android.os.SystemClock;
29import android.util.Log;
30import android.view.View;
31
32import com.android.systemui.Interpolators;
33import com.android.systemui.R;
34
35public class BarTransitions {
36    private static final boolean DEBUG = false;
37    private static final boolean DEBUG_COLORS = false;
38
39    public static final boolean HIGH_END = ActivityManager.isHighEndGfx();
40
41    public static final int MODE_OPAQUE = 0;
42    public static final int MODE_SEMI_TRANSPARENT = 1;
43    public static final int MODE_TRANSLUCENT = 2;
44    public static final int MODE_LIGHTS_OUT = 3;
45    public static final int MODE_TRANSPARENT = 4;
46    public static final int MODE_WARNING = 5;
47    public static final int MODE_LIGHTS_OUT_TRANSPARENT = 6;
48
49    public static final int LIGHTS_IN_DURATION = 250;
50    public static final int LIGHTS_OUT_DURATION = 750;
51    public static final int BACKGROUND_DURATION = 200;
52
53    private final String mTag;
54    private final View mView;
55    private final BarBackgroundDrawable mBarBackground;
56
57    private int mMode;
58
59    public BarTransitions(View view, int gradientResourceId) {
60        mTag = "BarTransitions." + view.getClass().getSimpleName();
61        mView = view;
62        mBarBackground = new BarBackgroundDrawable(mView.getContext(), gradientResourceId);
63        if (HIGH_END) {
64            mView.setBackground(mBarBackground);
65        }
66    }
67
68    public int getMode() {
69        return mMode;
70    }
71
72    public void transitionTo(int mode, boolean animate) {
73        // low-end devices do not support translucent modes, fallback to opaque
74        if (!HIGH_END && (mode == MODE_SEMI_TRANSPARENT || mode == MODE_TRANSLUCENT
75                || mode == MODE_TRANSPARENT)) {
76            mode = MODE_OPAQUE;
77        }
78        if (!HIGH_END && (mode == MODE_LIGHTS_OUT_TRANSPARENT)) {
79            mode = MODE_LIGHTS_OUT;
80        }
81        if (mMode == mode) return;
82        int oldMode = mMode;
83        mMode = mode;
84        if (DEBUG) Log.d(mTag, String.format("%s -> %s animate=%s",
85                modeToString(oldMode), modeToString(mode),  animate));
86        onTransition(oldMode, mMode, animate);
87    }
88
89    protected void onTransition(int oldMode, int newMode, boolean animate) {
90        if (HIGH_END) {
91            applyModeBackground(oldMode, newMode, animate);
92        }
93    }
94
95    protected void applyModeBackground(int oldMode, int newMode, boolean animate) {
96        if (DEBUG) Log.d(mTag, String.format("applyModeBackground oldMode=%s newMode=%s animate=%s",
97                modeToString(oldMode), modeToString(newMode), animate));
98        mBarBackground.applyModeBackground(oldMode, newMode, animate);
99    }
100
101    public static String modeToString(int mode) {
102        if (mode == MODE_OPAQUE) return "MODE_OPAQUE";
103        if (mode == MODE_SEMI_TRANSPARENT) return "MODE_SEMI_TRANSPARENT";
104        if (mode == MODE_TRANSLUCENT) return "MODE_TRANSLUCENT";
105        if (mode == MODE_LIGHTS_OUT) return "MODE_LIGHTS_OUT";
106        if (mode == MODE_TRANSPARENT) return "MODE_TRANSPARENT";
107        if (mode == MODE_WARNING) return "MODE_WARNING";
108        if (mode == MODE_LIGHTS_OUT_TRANSPARENT) return "MODE_LIGHTS_OUT_TRANSPARENT";
109        throw new IllegalArgumentException("Unknown mode " + mode);
110    }
111
112    public void finishAnimations() {
113        mBarBackground.finishAnimation();
114    }
115
116    protected boolean isLightsOut(int mode) {
117        return mode == MODE_LIGHTS_OUT || mode == MODE_LIGHTS_OUT_TRANSPARENT;
118    }
119
120    private static class BarBackgroundDrawable extends Drawable {
121        private final int mOpaque;
122        private final int mSemiTransparent;
123        private final int mTransparent;
124        private final int mWarning;
125        private final Drawable mGradient;
126
127        private int mMode = -1;
128        private boolean mAnimating;
129        private long mStartTime;
130        private long mEndTime;
131
132        private int mGradientAlpha;
133        private int mColor;
134
135        private int mGradientAlphaStart;
136        private int mColorStart;
137
138        public BarBackgroundDrawable(Context context, int gradientResourceId) {
139            final Resources res = context.getResources();
140            if (DEBUG_COLORS) {
141                mOpaque = 0xff0000ff;
142                mSemiTransparent = 0x7f0000ff;
143                mTransparent = 0x2f0000ff;
144                mWarning = 0xffff0000;
145            } else {
146                mOpaque = context.getColor(R.color.system_bar_background_opaque);
147                mSemiTransparent = context.getColor(
148                        com.android.internal.R.color.system_bar_background_semi_transparent);
149                mTransparent = context.getColor(R.color.system_bar_background_transparent);
150                mWarning = context.getColor(com.android.internal.R.color.battery_saver_mode_color);
151            }
152            mGradient = context.getDrawable(gradientResourceId);
153        }
154
155        @Override
156        public void setAlpha(int alpha) {
157            // noop
158        }
159
160        @Override
161        public void setColorFilter(ColorFilter colorFilter) {
162            // noop
163        }
164
165        @Override
166        protected void onBoundsChange(Rect bounds) {
167            super.onBoundsChange(bounds);
168            mGradient.setBounds(bounds);
169        }
170
171        public void applyModeBackground(int oldMode, int newMode, boolean animate) {
172            if (mMode == newMode) return;
173            mMode = newMode;
174            mAnimating = animate;
175            if (animate) {
176                long now = SystemClock.elapsedRealtime();
177                mStartTime = now;
178                mEndTime = now + BACKGROUND_DURATION;
179                mGradientAlphaStart = mGradientAlpha;
180                mColorStart = mColor;
181            }
182            invalidateSelf();
183        }
184
185        @Override
186        public int getOpacity() {
187            return PixelFormat.TRANSLUCENT;
188        }
189
190        public void finishAnimation() {
191            if (mAnimating) {
192                mAnimating = false;
193                invalidateSelf();
194            }
195        }
196
197        @Override
198        public void draw(Canvas canvas) {
199            int targetGradientAlpha = 0, targetColor = 0;
200            if (mMode == MODE_WARNING) {
201                targetColor = mWarning;
202            } else if (mMode == MODE_TRANSLUCENT) {
203                targetColor = mSemiTransparent;
204            } else if (mMode == MODE_SEMI_TRANSPARENT) {
205                targetColor = mSemiTransparent;
206            } else if (mMode == MODE_TRANSPARENT || mMode == MODE_LIGHTS_OUT_TRANSPARENT) {
207                targetColor = mTransparent;
208            } else {
209                targetColor = mOpaque;
210            }
211            if (!mAnimating) {
212                mColor = targetColor;
213                mGradientAlpha = targetGradientAlpha;
214            } else {
215                final long now = SystemClock.elapsedRealtime();
216                if (now >= mEndTime) {
217                    mAnimating = false;
218                    mColor = targetColor;
219                    mGradientAlpha = targetGradientAlpha;
220                } else {
221                    final float t = (now - mStartTime) / (float)(mEndTime - mStartTime);
222                    final float v = Math.max(0, Math.min(
223                            Interpolators.LINEAR.getInterpolation(t), 1));
224                    mGradientAlpha = (int)(v * targetGradientAlpha + mGradientAlphaStart * (1 - v));
225                    mColor = Color.argb(
226                          (int)(v * Color.alpha(targetColor) + Color.alpha(mColorStart) * (1 - v)),
227                          (int)(v * Color.red(targetColor) + Color.red(mColorStart) * (1 - v)),
228                          (int)(v * Color.green(targetColor) + Color.green(mColorStart) * (1 - v)),
229                          (int)(v * Color.blue(targetColor) + Color.blue(mColorStart) * (1 - v)));
230                }
231            }
232            if (mGradientAlpha > 0) {
233                mGradient.setAlpha(mGradientAlpha);
234                mGradient.draw(canvas);
235            }
236            if (Color.alpha(mColor) > 0) {
237                canvas.drawColor(mColor);
238            }
239            if (mAnimating) {
240                invalidateSelf();  // keep going
241            }
242        }
243    }
244}
245