flutter_clock/lib/main.dart

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_clock/index_page.dart';
import 'package:flutter_clock/utils/app_utils.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:window_manager/window_manager.dart';

/// Description: enter point of the app
/// Time       : 04/06/2025 Sunday
/// Author     : liuyuqi.gov@msn.cn
void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  AppUtils.setOverrideForDesktop();
  
  // Initialize window manager for desktop platforms
  if (Platform.isWindows || Platform.isLinux || Platform.isMacOS) {
    await windowManager.ensureInitialized();
    
    // Calculate window size with 16:9 portrait ratio
    // Common phone resolution is 1080x1920 (16:9 portrait)
    const double width = 360.0;  // Phone width
    const double height = 640.0;  // Phone height (16:9 ratio)
    
    WindowOptions windowOptions = WindowOptions(
      size: Size(width, height),
      center: true,
      backgroundColor: Colors.transparent,
      skipTaskbar: false,
      titleBarStyle: TitleBarStyle.normal,
    );
    
    await windowManager.waitUntilReadyToShow(windowOptions, () async {
      await windowManager.show();
      await windowManager.focus();
    });
  }
  
  // Configure system settings for better background execution
  if (Platform.isAndroid) {
    SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
      statusBarColor: Colors.transparent,
      statusBarIconBrightness: Brightness.dark,
    ));
    
    // Prevent app from being killed in background
    SystemChannels.platform.invokeMethod('SystemChrome.setEnabledSystemUIMode', [
      SystemUiMode.edgeToEdge.index,
    ]);
  }
  
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // Initialize ScreenUtil for responsive UI
    return ScreenUtilInit(
      designSize: const Size(360, 640),  // Base design size
      minTextAdapt: true,
      splitScreenMode: true,
      builder: (context, child) {
        return MaterialApp(
          title: 'Flutter Clock',
          debugShowCheckedModeBanner: false,
          theme: ThemeData(
            primarySwatch: Colors.blue,
            visualDensity: VisualDensity.adaptivePlatformDensity,
            fontFamily: 'Roboto',
            brightness: Brightness.light,
            tabBarTheme: TabBarTheme(
              labelColor: Colors.blue,
              unselectedLabelColor: Colors.black87,
              indicatorSize: TabBarIndicatorSize.tab,
              labelStyle: TextStyle(fontWeight: FontWeight.bold),
              unselectedLabelStyle: TextStyle(fontWeight: FontWeight.normal),
            ),
            appBarTheme: AppBarTheme(
              color: Colors.white,
              foregroundColor: Colors.black,
              elevation: 1.0,
            ),
          ),
          home: IndexPage(),
        );
      }
    );
  }
}