我试图改变应用程序的主题，通过按下开关按钮，每个按钮更改为一个主题。
但是我需要帮助来处理按钮的 onPressed {}，这是整个应用程序的一部分屏幕：

List<AppTheme> themesNotInClass = [
        AppTheme(
          id: 'superhero_theme',
          description: "Super Hero Theme",
          data: superheroTheme,
        )
      ];

class ThemeChooser extends StatelessWidget {
  bool button1pressed = false;
  bool button2pressed = false;
  bool button3pressed = false;

  // Defining the route name of the screen to be accessed in other screens
  ThemeChooser({
    Key? key
  }) : super(key: key);
  static const String routeName = "/testingthemechooser";

  @override
  Widget build(BuildContext context) {
     return ThemeProvider(
      // Defining the booleans
      saveThemesOnChange: true,
      loadThemeOnInit: false,
      onInitCallback: (controller, previouslySavedThemeFuture) async {
        String? savedTheme = await previouslySavedThemeFuture;
        if (button1pressed == true) 
        if (savedTheme != null) {
          controller.setTheme(savedTheme);
        }
        else {
          Brightness platformBrightness = SchedulerBinding.instance.window.platformBrightness;
          if (platformBrightness == Brightness.dark) {
            controller.setTheme('superhero_theme');
          }}
          controller.forgetSavedTheme();
        }
      },
      themes: themesNotInClass,
      child: const MainWidget(button1pressed: false),
    );
  }
}

class MainWidget extends StatefulWidget {
  final bool button1pressed;
  const MainWidget({Key? key, required this.button1pressed}) : super(key: key);
  @override
  _MainWidgetState createState() => _MainWidgetState();
}
class _MainWidgetState extends State<MainWidget> {
  late bool button1pressed;
  late bool button2pressed;
  late bool button3pressed;
  @override
  void initState() {
    super.initState();
    button1pressed = widget.button1pressed;
  }
  @override
  Widget build(BuildContext context) {
    final themeController = CustomThemeController(
      providerId: 'provider_provider', 
      themes: {
        'superhero_theme': superheroTheme, 
        'blue_theme': ThemeData.light(),
      }, 
      defaultThemeId: 'default_theme'
    );
    return MaterialApp(
      title: 'Theme Chooser',
      home: ChangeNotifierProvider.value(
        value: themeController,
        child: Scaffold(
          appBar: AppBar(
            title: const Text('Theme Chooser'),
          ),
          body: Consumer<CustomThemeController>(
            builder: (context, controller, _) {
              return ListView(
                children: [
                  ListTile(
                    title: const Text('Super Hero'),
                    trailing: ElevatedButton(
                      onPressed: button1pressed
                          ? null
                          : () {
                              setState(() {
                                button1pressed = true;
                              });
                            },
                      child: const Text('Switch'),
                    ),
                  ),
                ],
              );
            },
          ),
        ),
      ),
    );
  }
}

class ThemeOptions implements AppThemeOptions {
  final Color specificButtonColor;
  ThemeOptions(this.specificButtonColor);
}

class CustomThemeController extends ChangeNotifier {
  final String providerId;
  final Map<String, ThemeData> themes;
  final String defaultThemeId;
  final bool saveThemesOnChange;
  final bool loadThemeOnInit;
  final ThemeData _currentTheme;

  CustomThemeController({
    required this.providerId,
    required this.themes,
    required this.defaultThemeId,
    this.saveThemesOnChange = true,
    this.loadThemeOnInit = false,
  }) : _currentTheme = themes[defaultThemeId] ?? ThemeData.light();

  ThemeData get currentTheme => _currentTheme;

}

我尝试了很多方法来实现这个功能，但没有得到积极的结果，我想更改按钮1按下，然后将结果发送到主类，即 * themchooser *