import 'package:flutter/material.dart';

void main() => runApp(SnackBarDemo());

// リスト 5.13
class SnackBarDemo extends StatelessWidget {
  const SnackBarDemo({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'SnackBar',
      home: Scaffold(
        appBar: AppBar(
          title: const Text('SnackBar')
        ),
        body: const TestPage(),
        floatingActionButton: FloatingActionButton(
          onPressed: () {},
          child: const Icon(Icons.arrow_forward)
        )
      )
    );
  }
}

class TestPage extends StatelessWidget {
  const TestPage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Center(
      child: IconButton(
        icon: Icon(Icons.airplanemode_active),
        onPressed: () {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(
              content: const Text('機内モードに設定しました'),
              action: SnackBarAction(
                label: 'キャンセル',
                onPressed: () {}
              )
            )
          );
        }
      )
    );
  }
}