1/*
2 * Copyright (C) 2017 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.example.android.support.transition.widget;
18
19import android.graphics.Rect;
20import android.os.Bundle;
21import android.support.annotation.NonNull;
22import android.support.transition.Explode;
23import android.support.transition.Transition;
24import android.support.transition.TransitionManager;
25import android.view.View;
26import android.widget.FrameLayout;
27
28import com.example.android.support.transition.R;
29
30import java.util.ArrayList;
31
32/**
33 * This demonstrates usage of {@link Explode} Transition type.
34 */
35public class ExplodeUsage extends TransitionUsageBase {
36
37    private FrameLayout mRoot;
38    private final ArrayList<View> mViews = new ArrayList<>();
39    private final Explode mExplode = new Explode();
40
41    final Rect mRect = new Rect();
42
43    @Override
44    int getLayoutResId() {
45        return R.layout.explode;
46    }
47
48    @Override
49    protected void onCreate(Bundle savedInstanceState) {
50        super.onCreate(savedInstanceState);
51        mExplode.setEpicenterCallback(new Transition.EpicenterCallback() {
52            @Override
53            public Rect onGetEpicenter(@NonNull Transition transition) {
54                return mRect;
55            }
56        });
57        mRoot = findViewById(R.id.root);
58        if (mViews.isEmpty()) {
59            mViews.add(findViewById(R.id.view_1));
60            mViews.add(findViewById(R.id.view_2));
61            mViews.add(findViewById(R.id.view_3));
62            mViews.add(findViewById(R.id.view_4));
63        }
64        findViewById(R.id.toggle).setOnClickListener(new View.OnClickListener() {
65            @Override
66            public void onClick(View v) {
67                v.getGlobalVisibleRect(mRect);
68                TransitionManager.beginDelayedTransition(mRoot, mExplode);
69                int vis = mViews.get(0).getVisibility() == View.VISIBLE ? View.GONE : View.VISIBLE;
70                for (View view : mViews) {
71                    view.setVisibility(vis);
72                }
73            }
74        });
75    }
76
77}
78