1/*
2 * Copyright (C) 2015 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.settingslib.animation;
18
19import android.animation.Animator;
20import android.animation.AnimatorListenerAdapter;
21import android.animation.ObjectAnimator;
22import android.animation.ValueAnimator;
23import android.content.Context;
24import android.view.RenderNodeAnimator;
25import android.view.View;
26import android.view.ViewPropertyAnimator;
27import android.view.animation.AnimationUtils;
28import android.view.animation.Interpolator;
29
30import com.android.internal.widget.LockPatternView;
31import com.android.settingslib.R;
32
33/**
34 * A class to make nice appear transitions for views in a tabular layout.
35 */
36public class AppearAnimationUtils implements AppearAnimationCreator<View> {
37
38    public static final long DEFAULT_APPEAR_DURATION = 220;
39
40    private final Interpolator mInterpolator;
41    private final float mStartTranslation;
42    private final AppearAnimationProperties mProperties = new AppearAnimationProperties();
43    protected final float mDelayScale;
44    private final long mDuration;
45    protected RowTranslationScaler mRowTranslationScaler;
46    protected boolean mAppearing;
47
48    public AppearAnimationUtils(Context ctx) {
49        this(ctx, DEFAULT_APPEAR_DURATION,
50                1.0f, 1.0f,
51                AnimationUtils.loadInterpolator(ctx, android.R.interpolator.linear_out_slow_in));
52    }
53
54    public AppearAnimationUtils(Context ctx, long duration, float translationScaleFactor,
55            float delayScaleFactor, Interpolator interpolator) {
56        mInterpolator = interpolator;
57        mStartTranslation = ctx.getResources().getDimensionPixelOffset(
58                R.dimen.appear_y_translation_start) * translationScaleFactor;
59        mDelayScale = delayScaleFactor;
60        mDuration = duration;
61        mAppearing = true;
62    }
63
64    public void startAnimation2d(View[][] objects, final Runnable finishListener) {
65        startAnimation2d(objects, finishListener, this);
66    }
67
68    public void startAnimation(View[] objects, final Runnable finishListener) {
69        startAnimation(objects, finishListener, this);
70    }
71
72    public <T> void startAnimation2d(T[][] objects, final Runnable finishListener,
73            AppearAnimationCreator<T> creator) {
74        AppearAnimationProperties properties = getDelays(objects);
75        startAnimations(properties, objects, finishListener, creator);
76    }
77
78    public <T> void startAnimation(T[] objects, final Runnable finishListener,
79            AppearAnimationCreator<T> creator) {
80        AppearAnimationProperties properties = getDelays(objects);
81        startAnimations(properties, objects, finishListener, creator);
82    }
83
84    private <T> void startAnimations(AppearAnimationProperties properties, T[] objects,
85            final Runnable finishListener, AppearAnimationCreator<T> creator) {
86        if (properties.maxDelayRowIndex == -1 || properties.maxDelayColIndex == -1) {
87            finishListener.run();
88            return;
89        }
90        for (int row = 0; row < properties.delays.length; row++) {
91            long[] columns = properties.delays[row];
92            long delay = columns[0];
93            Runnable endRunnable = null;
94            if (properties.maxDelayRowIndex == row && properties.maxDelayColIndex == 0) {
95                endRunnable = finishListener;
96            }
97            float translationScale = mRowTranslationScaler != null
98                    ? mRowTranslationScaler.getRowTranslationScale(row, properties.delays.length)
99                    : 1f;
100            float translation = translationScale * mStartTranslation;
101            creator.createAnimation(objects[row], delay, mDuration,
102                    mAppearing ? translation : -translation,
103                    mAppearing, mInterpolator, endRunnable);
104        }
105    }
106
107    private <T> void startAnimations(AppearAnimationProperties properties, T[][] objects,
108            final Runnable finishListener, AppearAnimationCreator<T> creator) {
109        if (properties.maxDelayRowIndex == -1 || properties.maxDelayColIndex == -1) {
110            finishListener.run();
111            return;
112        }
113        for (int row = 0; row < properties.delays.length; row++) {
114            long[] columns = properties.delays[row];
115            float translationScale = mRowTranslationScaler != null
116                    ? mRowTranslationScaler.getRowTranslationScale(row, properties.delays.length)
117                    : 1f;
118            float translation = translationScale * mStartTranslation;
119            for (int col = 0; col < columns.length; col++) {
120                long delay = columns[col];
121                Runnable endRunnable = null;
122                if (properties.maxDelayRowIndex == row && properties.maxDelayColIndex == col) {
123                    endRunnable = finishListener;
124                }
125                creator.createAnimation(objects[row][col], delay, mDuration,
126                        mAppearing ? translation : -translation,
127                        mAppearing, mInterpolator, endRunnable);
128            }
129        }
130    }
131
132    private <T> AppearAnimationProperties getDelays(T[] items) {
133        long maxDelay = -1;
134        mProperties.maxDelayColIndex = -1;
135        mProperties.maxDelayRowIndex = -1;
136        mProperties.delays = new long[items.length][];
137        for (int row = 0; row < items.length; row++) {
138            mProperties.delays[row] = new long[1];
139            long delay = calculateDelay(row, 0);
140            mProperties.delays[row][0] = delay;
141            if (items[row] != null && delay > maxDelay) {
142                maxDelay = delay;
143                mProperties.maxDelayColIndex = 0;
144                mProperties.maxDelayRowIndex = row;
145            }
146        }
147        return mProperties;
148    }
149
150    private <T> AppearAnimationProperties getDelays(T[][] items) {
151        long maxDelay = -1;
152        mProperties.maxDelayColIndex = -1;
153        mProperties.maxDelayRowIndex = -1;
154        mProperties.delays = new long[items.length][];
155        for (int row = 0; row < items.length; row++) {
156            T[] columns = items[row];
157            mProperties.delays[row] = new long[columns.length];
158            for (int col = 0; col < columns.length; col++) {
159                long delay = calculateDelay(row, col);
160                mProperties.delays[row][col] = delay;
161                if (items[row][col] != null && delay > maxDelay) {
162                    maxDelay = delay;
163                    mProperties.maxDelayColIndex = col;
164                    mProperties.maxDelayRowIndex = row;
165                }
166            }
167        }
168        return mProperties;
169    }
170
171    protected long calculateDelay(int row, int col) {
172        return (long) ((row * 40 + col * (Math.pow(row, 0.4) + 0.4) * 20) * mDelayScale);
173    }
174
175    public Interpolator getInterpolator() {
176        return mInterpolator;
177    }
178
179    public float getStartTranslation() {
180        return mStartTranslation;
181    }
182
183    @Override
184    public void createAnimation(final View view, long delay, long duration, float translationY,
185            boolean appearing, Interpolator interpolator, final Runnable endRunnable) {
186        if (view != null) {
187            view.setAlpha(appearing ? 0f : 1.0f);
188            view.setTranslationY(appearing ? translationY : 0);
189            Animator alphaAnim;
190            float targetAlpha =  appearing ? 1f : 0f;
191            if (view.isHardwareAccelerated()) {
192                RenderNodeAnimator alphaAnimRt = new RenderNodeAnimator(RenderNodeAnimator.ALPHA,
193                        targetAlpha);
194                alphaAnimRt.setTarget(view);
195                alphaAnim = alphaAnimRt;
196            } else {
197                alphaAnim = ObjectAnimator.ofFloat(view, View.ALPHA, view.getAlpha(), targetAlpha);
198            }
199            alphaAnim.setInterpolator(interpolator);
200            alphaAnim.setDuration(duration);
201            alphaAnim.setStartDelay(delay);
202            if (view.hasOverlappingRendering()) {
203                view.setLayerType(View.LAYER_TYPE_HARDWARE, null);
204                alphaAnim.addListener(new AnimatorListenerAdapter() {
205                    @Override
206                    public void onAnimationEnd(Animator animation) {
207                        view.setLayerType(View.LAYER_TYPE_NONE, null);
208                    }
209                });
210            }
211            if (endRunnable != null) {
212                alphaAnim.addListener(new AnimatorListenerAdapter() {
213                    @Override
214                    public void onAnimationEnd(Animator animation) {
215                        endRunnable.run();
216                    }
217                });
218            }
219            alphaAnim.start();
220            startTranslationYAnimation(view, delay, duration, appearing ? 0 : translationY,
221                    interpolator);
222        }
223    }
224
225    public static void startTranslationYAnimation(View view, long delay, long duration,
226            float endTranslationY, Interpolator interpolator) {
227        Animator translationAnim;
228        if (view.isHardwareAccelerated()) {
229            RenderNodeAnimator translationAnimRt = new RenderNodeAnimator(
230                    RenderNodeAnimator.TRANSLATION_Y, endTranslationY);
231            translationAnimRt.setTarget(view);
232            translationAnim = translationAnimRt;
233        } else {
234            translationAnim = ObjectAnimator.ofFloat(view, View.TRANSLATION_Y,
235                    view.getTranslationY(), endTranslationY);
236        }
237        translationAnim.setInterpolator(interpolator);
238        translationAnim.setDuration(duration);
239        translationAnim.setStartDelay(delay);
240        translationAnim.start();
241    }
242
243    public class AppearAnimationProperties {
244        public long[][] delays;
245        public int maxDelayRowIndex;
246        public int maxDelayColIndex;
247    }
248
249    public interface RowTranslationScaler {
250        float getRowTranslationScale(int row, int numRows);
251    }
252}
253