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/packages/SystemUI/src/com/android/systemui/statusbar/phone/BarTransitions.java

https://github.com/aizuzi/platform_frameworks_base
Java | 225 lines | 177 code | 29 blank | 19 comment | 38 complexity | a7b7835b03c54e2f4165aa418c8b9acd MD5 | raw file
  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
 47    public static final int LIGHTS_IN_DURATION = 250;
 48    public static final int LIGHTS_OUT_DURATION = 750;
 49    public static final int BACKGROUND_DURATION = 200;
 50
 51    private final String mTag;
 52    private final View mView;
 53    private final BarBackgroundDrawable mBarBackground;
 54
 55    private int mMode;
 56
 57    public BarTransitions(View view, int gradientResourceId) {
 58        mTag = "BarTransitions." + view.getClass().getSimpleName();
 59        mView = view;
 60        mBarBackground = new BarBackgroundDrawable(mView.getContext(), gradientResourceId);
 61        if (HIGH_END) {
 62            mView.setBackground(mBarBackground);
 63        }
 64    }
 65
 66    public int getMode() {
 67        return mMode;
 68    }
 69
 70    public void transitionTo(int mode, boolean animate) {
 71        // low-end devices do not support translucent modes, fallback to opaque
 72        if (!HIGH_END && (mode == MODE_SEMI_TRANSPARENT || mode == MODE_TRANSLUCENT)) {
 73            mode = MODE_OPAQUE;
 74        }
 75        if (mMode == mode) return;
 76        int oldMode = mMode;
 77        mMode = mode;
 78        if (DEBUG) Log.d(mTag, String.format("%s -> %s animate=%s",
 79                modeToString(oldMode), modeToString(mode),  animate));
 80        onTransition(oldMode, mMode, animate);
 81    }
 82
 83    protected void onTransition(int oldMode, int newMode, boolean animate) {
 84        if (HIGH_END) {
 85            applyModeBackground(oldMode, newMode, animate);
 86        }
 87    }
 88
 89    protected void applyModeBackground(int oldMode, int newMode, boolean animate) {
 90        if (DEBUG) Log.d(mTag, String.format("applyModeBackground oldMode=%s newMode=%s animate=%s",
 91                modeToString(oldMode), modeToString(newMode), animate));
 92        mBarBackground.applyModeBackground(oldMode, newMode, animate);
 93    }
 94
 95    public static String modeToString(int mode) {
 96        if (mode == MODE_OPAQUE) return "MODE_OPAQUE";
 97        if (mode == MODE_SEMI_TRANSPARENT) return "MODE_SEMI_TRANSPARENT";
 98        if (mode == MODE_TRANSLUCENT) return "MODE_TRANSLUCENT";
 99        if (mode == MODE_LIGHTS_OUT) return "MODE_LIGHTS_OUT";
100        throw new IllegalArgumentException("Unknown mode " + mode);
101    }
102
103    public void finishAnimations() {
104        mBarBackground.finishAnimation();
105    }
106
107    public void setContentVisible(boolean visible) {
108        // for subclasses
109    }
110
111    private static class BarBackgroundDrawable extends Drawable {
112        private final int mOpaque;
113        private final int mSemiTransparent;
114        private final Drawable mGradient;
115        private final TimeInterpolator mInterpolator;
116
117        private int mMode = -1;
118        private boolean mAnimating;
119        private long mStartTime;
120        private long mEndTime;
121
122        private int mGradientAlpha;
123        private int mColor;
124
125        private int mGradientAlphaStart;
126        private int mColorStart;
127
128        public BarBackgroundDrawable(Context context, int gradientResourceId) {
129            final Resources res = context.getResources();
130            if (DEBUG_COLORS) {
131                mOpaque = 0xff0000ff;
132                mSemiTransparent = 0x7f0000ff;
133            } else {
134                mOpaque = res.getColor(R.color.system_bar_background_opaque);
135                mSemiTransparent = res.getColor(R.color.system_bar_background_semi_transparent);
136            }
137            mGradient = res.getDrawable(gradientResourceId);
138            mInterpolator = new LinearInterpolator();
139        }
140
141        @Override
142        public void setAlpha(int alpha) {
143            // noop
144        }
145
146        @Override
147        public void setColorFilter(ColorFilter cf) {
148            // noop
149        }
150
151        @Override
152        protected void onBoundsChange(Rect bounds) {
153            super.onBoundsChange(bounds);
154            mGradient.setBounds(bounds);
155        }
156
157        public void applyModeBackground(int oldMode, int newMode, boolean animate) {
158            if (mMode == newMode) return;
159            mMode = newMode;
160            mAnimating = animate;
161            if (animate) {
162                long now = SystemClock.elapsedRealtime();
163                mStartTime = now;
164                mEndTime = now + BACKGROUND_DURATION;
165                mGradientAlphaStart = mGradientAlpha;
166                mColorStart = mColor;
167            }
168            invalidateSelf();
169        }
170
171        @Override
172        public int getOpacity() {
173            return PixelFormat.TRANSLUCENT;
174        }
175
176        public void finishAnimation() {
177            if (mAnimating) {
178                mAnimating = false;
179                invalidateSelf();
180            }
181        }
182
183        @Override
184        public void draw(Canvas canvas) {
185            int targetGradientAlpha = 0, targetColor = 0;
186            if (mMode == MODE_TRANSLUCENT) {
187                targetGradientAlpha = 0xff;
188            } else if (mMode == MODE_SEMI_TRANSPARENT) {
189                targetColor = mSemiTransparent;
190            } else {
191                targetColor = mOpaque;
192            }
193            if (!mAnimating) {
194                mColor = targetColor;
195                mGradientAlpha = targetGradientAlpha;
196            } else {
197                final long now = SystemClock.elapsedRealtime();
198                if (now >= mEndTime) {
199                    mAnimating = false;
200                    mColor = targetColor;
201                    mGradientAlpha = targetGradientAlpha;
202                } else {
203                    final float t = (now - mStartTime) / (float)(mEndTime - mStartTime);
204                    final float v = Math.max(0, Math.min(mInterpolator.getInterpolation(t), 1));
205                    mGradientAlpha = (int)(v * targetGradientAlpha + mGradientAlphaStart * (1 - v));
206                    mColor = Color.argb(
207                          (int)(v * Color.alpha(targetColor) + Color.alpha(mColorStart) * (1 - v)),
208                          (int)(v * Color.red(targetColor) + Color.red(mColorStart) * (1 - v)),
209                          (int)(v * Color.green(targetColor) + Color.green(mColorStart) * (1 - v)),
210                          (int)(v * Color.blue(targetColor) + Color.blue(mColorStart) * (1 - v)));
211                }
212            }
213            if (mGradientAlpha > 0) {
214                mGradient.setAlpha(mGradientAlpha);
215                mGradient.draw(canvas);
216            }
217            if (Color.alpha(mColor) > 0) {
218                canvas.drawColor(mColor);
219            }
220            if (mAnimating) {
221                invalidateSelf();  // keep going
222            }
223        }
224    }
225}