boring_to_beautiful/step_03/lib/src/shared/app.dart

// Copyright 2022 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

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

import 'playback/bloc/bloc.dart';
import 'providers/theme.dart';
import 'router.dart';
import 'views/views.dart';

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

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final settings = ValueNotifier(
    ThemeSettings(sourceColor: Colors.pink, themeMode: ThemeMode.system),
  );
  @override
  Widget build(BuildContext context) {
    return BlocProvider<PlaybackBloc>(
      create: (context) => PlaybackBloc(),
      child: DynamicColorBuilder(
        builder: (lightDynamic, darkDynamic) => ThemeProvider(
          lightDynamic: lightDynamic,
          darkDynamic: darkDynamic,
          settings: settings,
          child: NotificationListener<ThemeSettingChange>(
            onNotification: (notification) {
              settings.value = notification.settings;
              return true;
            },
            child: ValueListenableBuilder<ThemeSettings>(
              valueListenable: settings,
              builder: (context, value, _) {
                final theme = ThemeProvider.of(context);
                return MaterialApp.router(
                  debugShowCheckedModeBanner: false,
                  title: 'Flutter Demo',
                  theme: theme.light(settings.value.sourceColor),
                  darkTheme: theme.dark(settings.value.sourceColor),
                  themeMode: theme.themeMode(),
                  routeInformationParser: appRouter.routeInformationParser,
                  routeInformationProvider: appRouter.routeInformationProvider,
                  routerDelegate: appRouter.routerDelegate,
                  builder: (context, child) {
                    return PlayPauseListener(child: child!);
                  },
                );
              },
            ),
          ),
        ),
      ),
    );
  }
}