//flutter
import 'package:flutter/material.dart';

void main() {
  return runApp(TestPage());
}

//リスト4.50_cf
class TestPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Hero',
      home: Scaffold(
        appBar: AppBar(title: Text('Hero')),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Hero(
                tag: 'icon',
                child: Image.asset(
                  'images/icon.png',
                  width: 100,
                  height: 100,
                )
              ),
              ElevatedButton(
                onPressed: () =>
                    Navigator.of(context).pushNamed('/detail_page'),
                child: Text('Hero'),
              )
            ]
          )
        )
      )
    );
  }
}

class DetailPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Hero',
      home: Scaffold(
        appBar: AppBar(title: Text('Hero')),
        body: Center(
          child: Hero(
            tag: 'icon',
            child: Image.asset(
              'images/icon.png',
              width: 300,
              height: 300,
            )
          )
        )
      )
    );
  }
}