animated_align.0.dart 1.46 KB
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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

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/// Flutter code sample for [AnimatedAlign].
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import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
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  const MyApp({super.key});
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  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: const MyStatefulWidget(),
      ),
    );
  }
}

class MyStatefulWidget extends StatefulWidget {
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  const MyStatefulWidget({super.key});
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  @override
  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}

class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  bool selected = false;

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        setState(() {
          selected = !selected;
        });
      },
      child: Center(
        child: Container(
          width: 250.0,
          height: 250.0,
          color: Colors.red,
          child: AnimatedAlign(
            alignment: selected ? Alignment.topRight : Alignment.bottomLeft,
            duration: const Duration(seconds: 1),
            curve: Curves.fastOutSlowIn,
            child: const FlutterLogo(size: 50.0),
          ),
        ),
      ),
    );
  }
}