BarTransitions.java revision 255dd04271088590fedc46c8e22b2fd4ab142d39 
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.animation.TimeInterpolator;
20import android.app.ActivityManager;
21import android.content.Context;
22import android.content.res.Resources;
23import android.graphics.Canvas;
24import android.graphics.Color;
25import android.graphics.ColorFilter;
26import android.graphics.PixelFormat;
27import android.graphics.Rect;
28import android.graphics.drawable.Drawable;
29import android.os.SystemClock;
30import android.util.Log;
31import android.view.View;
32import android.view.animation.LinearInterpolator;
33
34import com.android.systemui.R;
35
36public class BarTransitions {
37    private static final boolean DEBUG = false;
38    private static final boolean DEBUG_COLORS = false;
39
40    public static final boolean HIGH_END = ActivityManager.isHighEndGfx();
41
42    public static final int MODE_OPAQUE = 0;
43    public static final int MODE_SEMI_TRANSPARENT = 1;
44    public static final int MODE_TRANSLUCENT = 2;
45    public static final int MODE_LIGHTS_OUT = 3;
46    public static final int MODE_TRANSPARENT = 4;
47    public static final int MODE_WARNING = 5;
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 (mMode == mode) return;
79        int oldMode = mMode;
80        mMode = mode;
81        if (DEBUG) Log.d(mTag, String.format("%s -> %s animate=%s",
82                modeToString(oldMode), modeToString(mode),  animate));
83        onTransition(oldMode, mMode, animate);
84    }
85
86    protected void onTransition(int oldMode, int newMode, boolean animate) {
87        if (HIGH_END) {
88            applyModeBackground(oldMode, newMode, animate);
89        }
90    }
91
92    protected void applyModeBackground(int oldMode, int newMode, boolean animate) {
93        if (DEBUG) Log.d(mTag, String.format("applyModeBackground oldMode=%s newMode=%s animate=%s",
94                modeToString(oldMode), modeToString(newMode), animate));
95        mBarBackground.applyModeBackground(oldMode, newMode, animate);
96    }
97
98    public static String modeToString(int mode) {
99        if (mode == MODE_OPAQUE) return "MODE_OPAQUE";
100        if (mode == MODE_SEMI_TRANSPARENT) return "MODE_SEMI_TRANSPARENT";
101        if (mode == MODE_TRANSLUCENT) return "MODE_TRANSLUCENT";
102        if (mode == MODE_LIGHTS_OUT) return "MODE_LIGHTS_OUT";
103        if (mode == MODE_TRANSPARENT) return "MODE_TRANSPARENT";
104        if (mode == MODE_WARNING) return "MODE_WARNING";
105        throw new IllegalArgumentException("Unknown mode " + mode);
106    }
107
108    public void finishAnimations() {
109        mBarBackground.finishAnimation();
110    }
111
112    private static class BarBackgroundDrawable extends Drawable {
113        private final int mOpaque;
114        private final int mSemiTransparent;
115        private final int mTransparent;
116        private final int mWarning;
117        private final Drawable mGradient;
118        private final TimeInterpolator mInterpolator;
119
120        private int mMode = -1;
121        private boolean mAnimating;
122        private long mStartTime;
123        private long mEndTime;
124
125        private int mGradientAlpha;
126        private int mColor;
127
128        private int mGradientAlphaStart;
129        private int mColorStart;
130
131        public BarBackgroundDrawable(Context context, int gradientResourceId) {
132            final Resources res = context.getResources();
133            if (DEBUG_COLORS) {
134                mOpaque = 0xff0000ff;
135                mSemiTransparent = 0x7f0000ff;
136                mTransparent = 0x2f0000ff;
137                mWarning = 0xffff0000;
138            } else {
139                mOpaque = res.getColor(R.color.system_bar_background_opaque);
140                mSemiTransparent = res.getColor(R.color.system_bar_background_semi_transparent);
141                mTransparent = res.getColor(R.color.system_bar_background_transparent);
142                mWarning = res.getColor(com.android.internal.R.color.battery_saver_mode_color);
143            }
144            mGradient = res.getDrawable(gradientResourceId);
145            mInterpolator = new LinearInterpolator();
146        }
147
148        @Override
149        public void setAlpha(int alpha) {
150            // noop
151        }
152
153        @Override
154        public void setColorFilter(ColorFilter cf) {
155            // noop
156        }
157
158        @Override
159        protected void onBoundsChange(Rect bounds) {
160            super.onBoundsChange(bounds);
161            mGradient.setBounds(bounds);
162        }
163
164        public void applyModeBackground(int oldMode, int newMode, boolean animate) {
165            if (mMode == newMode) return;
166            mMode = newMode;
167            mAnimating = animate;
168            if (animate) {
169                long now = SystemClock.elapsedRealtime();
170                mStartTime = now;
171                mEndTime = now + BACKGROUND_DURATION;
172                mGradientAlphaStart = mGradientAlpha;
173                mColorStart = mColor;
174            }
175            invalidateSelf();
176        }
177
178        @Override
179        public int getOpacity() {
180            return PixelFormat.TRANSLUCENT;
181        }
182
183        public void finishAnimation() {
184            if (mAnimating) {
185                mAnimating = false;
186                invalidateSelf();
187            }
188        }
189
190        @Override
191        public void draw(Canvas canvas) {
192            int targetGradientAlpha = 0, targetColor = 0;
193            if (mMode == MODE_WARNING) {
194                targetColor = mWarning;
195            } else if (mMode == MODE_TRANSLUCENT) {
196                targetColor = mSemiTransparent;
197            } else if (mMode == MODE_SEMI_TRANSPARENT) {
198                targetColor = mSemiTransparent;
199            } else if (mMode == MODE_TRANSPARENT) {
200                targetColor = mTransparent;
201            } else {
202                targetColor = mOpaque;
203            }
204            if (!mAnimating) {
205                mColor = targetColor;
206                mGradientAlpha = targetGradientAlpha;
207            } else {
208                final long now = SystemClock.elapsedRealtime();
209                if (now >= mEndTime) {
210                    mAnimating = false;
211                    mColor = targetColor;
212                    mGradientAlpha = targetGradientAlpha;
213                } else {
214                    final float t = (now - mStartTime) / (float)(mEndTime - mStartTime);
215                    final float v = Math.max(0, Math.min(mInterpolator.getInterpolation(t), 1));
216                    mGradientAlpha = (int)(v * targetGradientAlpha + mGradientAlphaStart * (1 - v));
217                    mColor = Color.argb(
218                          (int)(v * Color.alpha(targetColor) + Color.alpha(mColorStart) * (1 - v)),
219                          (int)(v * Color.red(targetColor) + Color.red(mColorStart) * (1 - v)),
220                          (int)(v * Color.green(targetColor) + Color.green(mColorStart) * (1 - v)),
221                          (int)(v * Color.blue(targetColor) + Color.blue(mColorStart) * (1 - v)));
222                }
223            }
224            if (mGradientAlpha > 0) {
225                mGradient.setAlpha(mGradientAlpha);
226                mGradient.draw(canvas);
227            }
228            if (Color.alpha(mColor) > 0) {
229                canvas.drawColor(mColor);
230            }
231            if (mAnimating) {
232                invalidateSelf();  // keep going
233            }
234        }
235    }
236}
237