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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.
import 'package:flutter/material.dart';
/// Flutter code sample for [AnimatedPositioned].
void main() => runApp(const AnimatedPositionedExampleApp());
class AnimatedPositionedExampleApp extends StatelessWidget {
const AnimatedPositionedExampleApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: const Text('AnimatedPositioned Sample')),
body: const Center(
child: AnimatedPositionedExample(),
),
),
);
}
}
class AnimatedPositionedExample extends StatefulWidget {
const AnimatedPositionedExample({super.key});
@override
State<AnimatedPositionedExample> createState() => _AnimatedPositionedExampleState();
}
class _AnimatedPositionedExampleState extends State<AnimatedPositionedExample> {
bool selected = false;
@override
Widget build(BuildContext context) {
return SizedBox(
width: 200,
height: 350,
child: Stack(
children: <Widget>[
AnimatedPositioned(
width: selected ? 200.0 : 50.0,
height: selected ? 50.0 : 200.0,
top: selected ? 50.0 : 150.0,
duration: const Duration(seconds: 2),
curve: Curves.fastOutSlowIn,
child: GestureDetector(
onTap: () {
setState(() {
selected = !selected;
});
},
child: const ColoredBox(
color: Colors.blue,
child: Center(child: Text('Tap me')),
),
),
),
],
),
);
}
}