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

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

//リスト4.45
class TestPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final tabNames = <String>['First', 'Second', 'Third', 'Fourth'];
    return MaterialApp(
      title: 'Tab',
      home: DefaultTabController(
        length: tabNames.length,
        child: Scaffold(
          appBar: AppBar(
            bottom: TabBar(
              tabs: tabNames
                .map((tabName) => Tab(text: tabName))
                .toList()
            ),
            title: Text('Tabs')
          ),
          body: TabBarView(
            children: tabNames
              .map((tabName) => Center(child: Text(tabName)))
              .toList()
          )
        )
      )
    );
  }
}