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.os.Bundle;
20import android.view.LayoutInflater;
21import android.view.View;
22import android.widget.FrameLayout;
23import android.widget.LinearLayout;
24
25import androidx.interpolator.view.animation.FastOutSlowInInterpolator;
26import androidx.transition.ArcMotion;
27import androidx.transition.ChangeTransform;
28import androidx.transition.TransitionManager;
29
30import com.example.android.support.transition.R;
31
32/**
33 * This demonstrates basic usage of the ChangeTransform Transition.
34 */
35public class ChangeTransformUsage extends TransitionUsageBase {
36
37    private LinearLayout mRoot;
38    private FrameLayout mContainer1;
39    private FrameLayout mContainer2;
40    private ChangeTransform mChangeTransform;
41
42    @Override
43    int getLayoutResId() {
44        return R.layout.change_transform;
45    }
46
47    @Override
48    protected void onCreate(Bundle savedInstanceState) {
49        super.onCreate(savedInstanceState);
50        mChangeTransform = new ChangeTransform();
51        mChangeTransform.setInterpolator(new FastOutSlowInInterpolator());
52        mChangeTransform.setPathMotion(new ArcMotion());
53        mRoot = findViewById(R.id.root);
54        mContainer1 = findViewById(R.id.container_1);
55        mContainer2 = findViewById(R.id.container_2);
56        findViewById(R.id.toggle).setOnClickListener(new View.OnClickListener() {
57            @Override
58            public void onClick(View v) {
59                TransitionManager.beginDelayedTransition(mRoot, mChangeTransform);
60                toggle();
61            }
62        });
63        showRedSquare(mContainer1);
64    }
65
66    void toggle() {
67        if (mContainer2.getChildCount() > 0) {
68            mContainer2.removeAllViews();
69            showRedSquare(mContainer1);
70        } else {
71            mContainer1.removeAllViews();
72            showRedSquare(mContainer2);
73            mContainer2.getChildAt(0).setRotation(45);
74        }
75    }
76
77    private void showRedSquare(FrameLayout container) {
78        final View view = LayoutInflater.from(this)
79                .inflate(R.layout.red_square, container, false);
80        container.addView(view);
81    }
82
83}
84