Future<void> main() async {
  runApp(MaterialApp(
    initialRoute: "/",
    routes: {
      "/": (context) => const Home(),
    },
  ));
}

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

  @override
  State<Home> createState() => _HomeState();
}

class _HomeState extends State<Home> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Column(
        children: [
          Row(
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              Expanded(
                child: MenuBar(
                  children: <Widget>[
                    SubmenuButton(
                      menuChildren: <Widget>[
                        MenuItemButton(
                          onPressed: () {
                            showAboutDialog(
                              context: context,
                              applicationName: 'MenuBar Sample',
                              applicationVersion: '1.0.0',
                            );
                          },
                          child: const MenuAcceleratorLabel('&About'),
                        ),
                        MenuItemButton(
                          onPressed: () {
                            ScaffoldMessenger.of(context).showSnackBar(
                              const SnackBar(
                                content: Text('Saved!'),
                              ),
                            );
                          },
                          child: const MenuAcceleratorLabel('&Save'),
                        ),
                        MenuItemButton(
                          onPressed: () {
                            ScaffoldMessenger.of(context).showSnackBar(
                              const SnackBar(
                                content: Text('Quit!'),
                              ),
                            );
                          },
                          child: const MenuAcceleratorLabel('&Quit'),
                        ),
                      ],
                      child: const MenuAcceleratorLabel('&File'),
                    ),
                    SubmenuButton(
                      menuChildren: <Widget>[
                        MenuItemButton(
                          onPressed: () {
                            ScaffoldMessenger.of(context).showSnackBar(
                              const SnackBar(
                                content: Text('Magnify!'),
                              ),
                            );
                          },
                          child: const MenuAcceleratorLabel('&Magnify'),
                        ),
                        MenuItemButton(
                          onPressed: () {
                            ScaffoldMessenger.of(context).showSnackBar(
                              const SnackBar(
                                content: Text('Minify!'),
                              ),
                            );
                          },
                          child: const MenuAcceleratorLabel('Mi&nify'),
                        ),
                      ],
                      child: const MenuAcceleratorLabel('&View'),
                    ),
                  ],
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }
}