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.tv.settings.util;
18
19import android.animation.ObjectAnimator;
20import android.content.res.Resources;
21import android.util.TypedValue;
22
23import com.android.tv.settings.R;
24
25/**
26 * Utility class for handling transition animations.
27 */
28public class TransitionUtils {
29
30    /**
31     * Creates an object animator that use implements the alpha fade-in for an
32     * Activity's background.
33     */
34    public static ObjectAnimator createActivityFadeInAnimator(Resources res, boolean useFloats) {
35        TypedValue startAlpha = new TypedValue();
36        res.getValue(R.dimen.alpha_activity_in_bkg_start, startAlpha, true);
37
38        TypedValue endAlpha = new TypedValue();
39        res.getValue(R.dimen.alpha_activity_in_bkg_end, endAlpha, true);
40
41        ObjectAnimator animator = new ObjectAnimator();
42        animator.setPropertyName("alpha");
43        if (useFloats) {
44            animator.setFloatValues(startAlpha.getFloat(), endAlpha.getFloat());
45        } else {
46            animator.setIntValues(Float.valueOf(startAlpha.getFloat() * 255).intValue(),
47                    Float.valueOf(endAlpha.getFloat() * 255).intValue());
48        }
49        animator.setDuration(res.getInteger(R.integer.alpha_activity_in_bkg_duration));
50        animator.setStartDelay(res.getInteger(R.integer.alpha_activity_in_bkg_delay));
51        return animator;
52    }
53
54    public static ObjectAnimator createActivityFadeOutAnimator(Resources res, boolean useFloats) {
55        TypedValue startAlpha = new TypedValue();
56        res.getValue(R.dimen.alpha_activity_out_bkg_start, startAlpha, true);
57
58        TypedValue endAlpha = new TypedValue();
59        res.getValue(R.dimen.alpha_activity_out_bkg_end, endAlpha, true);
60
61        ObjectAnimator animator = new ObjectAnimator();
62        animator.setPropertyName("alpha");
63        if (useFloats) {
64            animator.setFloatValues(startAlpha.getFloat(), endAlpha.getFloat());
65        } else {
66            animator.setIntValues(Float.valueOf(startAlpha.getFloat() * 255).intValue(),
67                    Float.valueOf(endAlpha.getFloat() * 255).intValue());
68        }
69        animator.setDuration(res.getInteger(R.integer.alpha_activity_out_bkg_duration));
70        animator.setStartDelay(res.getInteger(R.integer.alpha_activity_out_bkg_delay));
71        return animator;
72    }
73}
74