BarTransitions.java revision 7edfbca5d00cbc376fda790b50a3fedb9c6070ab 
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.ArgbEvaluator;
20import android.animation.ValueAnimator;
21import android.animation.ValueAnimator.AnimatorUpdateListener;
22import android.app.ActivityManager;
23import android.content.res.Resources;
24import android.graphics.drawable.ColorDrawable;
25import android.graphics.drawable.Drawable;
26import android.util.Log;
27import android.view.View;
28
29import com.android.systemui.R;
30
31public class BarTransitions {
32    private static final boolean DEBUG = false;
33
34    public static final int MODE_OPAQUE = 0;
35    public static final int MODE_SEMI_TRANSPARENT = 1;
36    public static final int MODE_TRANSPARENT = 2;
37    public static final int MODE_LIGHTS_OUT = 3;
38
39    protected static final int LIGHTS_IN_DURATION = 250;
40    protected static final int LIGHTS_OUT_DURATION = 750;
41
42    private final String mTag;
43    protected final View mTarget;
44    protected final int mOpaque;
45    protected final int mSemiTransparent;
46
47    protected Drawable mTransparent;
48    private int mMode;
49    private ValueAnimator mBackgroundColorAnimator;
50
51    private final AnimatorUpdateListener mBackgroundColorListener = new AnimatorUpdateListener() {
52        @Override
53        public void onAnimationUpdate(ValueAnimator animator) {
54            mTarget.setBackgroundColor((Integer) animator.getAnimatedValue());
55        }
56    };
57
58    public BarTransitions(View target) {
59        mTag = "BarTransitions." + target.getClass().getSimpleName();
60        mTarget = target;
61        final Resources res = target.getContext().getResources();
62        mOpaque = res.getColor(R.drawable.status_bar_background);
63        mSemiTransparent = res.getColor(R.color.status_bar_background_semi_transparent);
64    }
65
66    public int getMode() {
67        return mMode;
68    }
69
70    public void transitionTo(int mode, boolean animate) {
71        if (mMode == mode) return;
72        int oldMode = mMode;
73        mMode = mode;
74        if (!ActivityManager.isHighEndGfx()) return;
75        if (DEBUG) Log.d(mTag, modeToString(oldMode) + " -> " + modeToString(mode));
76        onTransition(oldMode, mMode, animate);
77    }
78
79    protected Integer getBackgroundColor(int mode) {
80        if (mode == MODE_SEMI_TRANSPARENT) return mSemiTransparent;
81        if (mode == MODE_OPAQUE) return mOpaque;
82        if (mode == MODE_LIGHTS_OUT) return mOpaque;
83        return null;
84    }
85
86    protected void onTransition(int oldMode, int newMode, boolean animate) {
87        cancelBackgroundColorAnimation();
88        Integer oldColor = getBackgroundColor(oldMode);
89        Integer newColor = getBackgroundColor(newMode);
90        if (oldColor != null && newColor != null) {
91            if (animate) {
92                startBackgroundColorAnimation(oldColor, newColor);
93            } else {
94                mTarget.setBackgroundColor(newColor);
95            }
96        } else {
97            mTarget.setBackground(newMode == MODE_TRANSPARENT ? mTransparent
98                    : newMode == MODE_SEMI_TRANSPARENT ? new ColorDrawable(mSemiTransparent)
99                    : new ColorDrawable(mOpaque));
100        }
101    }
102
103    private void startBackgroundColorAnimation(int from, int to) {
104        mBackgroundColorAnimator = ValueAnimator.ofObject(new ArgbEvaluator(), from, to);
105        mBackgroundColorAnimator.addUpdateListener(mBackgroundColorListener);
106        mBackgroundColorAnimator.start();
107    }
108
109    private void cancelBackgroundColorAnimation() {
110        if (mBackgroundColorAnimator != null && mBackgroundColorAnimator.isStarted()) {
111            mBackgroundColorAnimator.cancel();
112            mBackgroundColorAnimator = null;
113        }
114    }
115
116    public static String modeToString(int mode) {
117        if (mode == MODE_OPAQUE) return "MODE_OPAQUE";
118        if (mode == MODE_SEMI_TRANSPARENT) return "MODE_SEMI_TRANSPARENT";
119        if (mode == MODE_TRANSPARENT) return "MODE_TRANSPARENT";
120        if (mode == MODE_LIGHTS_OUT) return "MODE_LIGHTS_OUT";
121        throw new IllegalArgumentException("Unknown mode " + mode);
122    }
123}
124