// 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')), ), ), ), ], ), ); } }