1/*
2 * Copyright (C) 2014 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.phone.common.animation;
18
19import android.animation.Animator;
20import android.animation.AnimatorListenerAdapter;
21import android.animation.ValueAnimator;
22import android.view.View;
23import android.view.ViewPropertyAnimator;
24import android.view.animation.Interpolator;
25
26import com.android.phone.common.compat.PathInterpolatorCompat;
27
28import java.lang.Float;
29
30public class AnimUtils {
31    public static final int DEFAULT_DURATION = -1;
32    public static final int NO_DELAY = 0;
33
34    public static final Interpolator EASE_IN = PathInterpolatorCompat.create(
35            0.0f, 0.0f, 0.2f, 1.0f);
36    public static final Interpolator EASE_OUT = PathInterpolatorCompat.create(
37            0.4f, 0.0f, 1.0f, 1.0f);
38    public static final Interpolator EASE_OUT_EASE_IN = PathInterpolatorCompat.create(
39            0.4f, 0, 0.2f, 1);
40
41    public static class AnimationCallback {
42        public void onAnimationEnd() {}
43        public void onAnimationCancel() {}
44    }
45
46    public static void crossFadeViews(View fadeIn, View fadeOut, int duration) {
47        fadeIn(fadeIn, duration);
48        fadeOut(fadeOut, duration);
49    }
50
51    public static void fadeOut(View fadeOut, int duration) {
52        fadeOut(fadeOut, duration, null);
53    }
54
55    public static void fadeOut(final View fadeOut, int durationMs,
56            final AnimationCallback callback) {
57        fadeOut.setAlpha(1);
58        final ViewPropertyAnimator animator = fadeOut.animate();
59        animator.cancel();
60        animator.alpha(0).withLayer().setListener(new AnimatorListenerAdapter() {
61            @Override
62            public void onAnimationEnd(Animator animation) {
63                fadeOut.setVisibility(View.GONE);
64                if (callback != null) {
65                    callback.onAnimationEnd();
66                }
67            }
68
69            @Override
70            public void onAnimationCancel(Animator animation) {
71                fadeOut.setVisibility(View.GONE);
72                fadeOut.setAlpha(0);
73                if (callback != null) {
74                    callback.onAnimationCancel();
75                }
76            }
77        });
78        if (durationMs != DEFAULT_DURATION) {
79            animator.setDuration(durationMs);
80        }
81        animator.start();
82    }
83
84    public static void fadeIn(View fadeIn, int durationMs) {
85        fadeIn(fadeIn, durationMs, NO_DELAY, null);
86    }
87
88    public static void fadeIn(final View fadeIn, int durationMs, int delay,
89            final AnimationCallback callback) {
90        fadeIn.setAlpha(0);
91        final ViewPropertyAnimator animator = fadeIn.animate();
92        animator.cancel();
93
94        animator.setStartDelay(delay);
95        animator.alpha(1).withLayer().setListener(new AnimatorListenerAdapter() {
96            @Override
97            public void onAnimationStart(Animator animation) {
98                fadeIn.setVisibility(View.VISIBLE);
99            }
100
101            @Override
102            public void onAnimationCancel(Animator animation) {
103                fadeIn.setAlpha(1);
104                if (callback != null) {
105                    callback.onAnimationCancel();
106                }
107            }
108
109            @Override
110            public void onAnimationEnd(Animator animation) {
111                if (callback != null) {
112                    callback.onAnimationEnd();
113                }
114            }
115        });
116        if (durationMs != DEFAULT_DURATION) {
117            animator.setDuration(durationMs);
118        }
119        animator.start();
120    }
121
122    /**
123     * Scales in the view from scale of 0 to actual dimensions.
124     * @param view The view to scale.
125     * @param durationMs The duration of the scaling in milliseconds.
126     * @param startDelayMs The delay to applying the scaling in milliseconds.
127     */
128    public static void scaleIn(final View view, int durationMs, int startDelayMs) {
129        AnimatorListenerAdapter listener = (new AnimatorListenerAdapter() {
130            @Override
131            public void onAnimationStart(Animator animation) {
132                view.setVisibility(View.VISIBLE);
133            }
134
135            @Override
136            public void onAnimationCancel(Animator animation) {
137                view.setScaleX(1);
138                view.setScaleY(1);
139            }
140        });
141        scaleInternal(view, 0 /* startScaleValue */, 1 /* endScaleValue */, durationMs,
142                startDelayMs, listener, EASE_IN);
143    }
144
145
146    /**
147     * Scales out the view from actual dimensions to 0.
148     * @param view The view to scale.
149     * @param durationMs The duration of the scaling in milliseconds.
150     */
151    public static void scaleOut(final View view, int durationMs) {
152        AnimatorListenerAdapter listener = new AnimatorListenerAdapter() {
153            @Override
154            public void onAnimationEnd(Animator animation) {
155                view.setVisibility(View.GONE);
156            }
157
158            @Override
159            public void onAnimationCancel(Animator animation) {
160                view.setVisibility(View.GONE);
161                view.setScaleX(0);
162                view.setScaleY(0);
163            }
164        };
165
166        scaleInternal(view, 1 /* startScaleValue */, 0 /* endScaleValue */, durationMs,
167                NO_DELAY, listener, EASE_OUT);
168    }
169
170    private static void scaleInternal(final View view, int startScaleValue, int endScaleValue,
171            int durationMs, int startDelay, AnimatorListenerAdapter listener,
172            Interpolator interpolator) {
173        view.setScaleX(startScaleValue);
174        view.setScaleY(startScaleValue);
175
176        final ViewPropertyAnimator animator = view.animate();
177        animator.cancel();
178
179        animator.setInterpolator(interpolator)
180            .scaleX(endScaleValue)
181            .scaleY(endScaleValue)
182            .setListener(listener)
183            .withLayer();
184
185        if (durationMs != DEFAULT_DURATION) {
186            animator.setDuration(durationMs);
187        }
188        animator.setStartDelay(startDelay);
189
190        animator.start();
191    }
192
193    /**
194     * Animates a view to the new specified dimensions.
195     * @param view The view to change the dimensions of.
196     * @param newWidth The new width of the view.
197     * @param newHeight The new height of the view.
198     */
199    public static void changeDimensions(final View view, final int newWidth, final int newHeight) {
200        ValueAnimator animator = ValueAnimator.ofFloat(0f, 1f);
201
202        final int oldWidth = view.getWidth();
203        final int oldHeight = view.getHeight();
204        final int deltaWidth = newWidth - oldWidth;
205        final int deltaHeight = newHeight - oldHeight;
206
207        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
208            @Override
209            public void onAnimationUpdate(ValueAnimator animator) {
210                Float value = (Float) animator.getAnimatedValue();
211
212                view.getLayoutParams().width = (int) (value * deltaWidth + oldWidth);
213                view.getLayoutParams().height = (int) (value * deltaHeight + oldHeight);
214                view.requestLayout();
215            }
216        });
217        animator.start();
218    }
219}
220