import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      title: 'Flutter Expanded Sample',
      home: const AnimatedContainerSample(),
    );
  }
}

class AnimatedContainerSample extends StatefulWidget {
  const AnimatedContainerSample({super.key});

  @override
  State<AnimatedContainerSample> createState() =>
      _AnimatedContainerSampleState();
}

class _AnimatedContainerSampleState extends State<AnimatedContainerSample> {
  bool selected = false;

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        setState(() {
          selected = !selected;
        });
      },
      child: Center(
        child: AnimatedContainer(
          width: selected ? 200.0 : 100.0,
          height: selected ? 100.0 : 200.0,
          color: selected ? Colors.red : Colors.blue,
          alignment:
              selected ? Alignment.center : AlignmentDirectional.topCenter,
          duration: const Duration(seconds: 2),
          curve: Curves.linear,
          child: const FlutterLogo(size: 75),
        ),
      ),
    );
  }
}