smooth_window_close 0.2.0

Hide Flutter Windows apps before graceful asynchronous shutdown.

example/lib/main.dart

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

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await windowManager.ensureInitialized();
  runApp(const ExampleApp());
}

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

  @override
  State<ExampleApp> createState() => _ExampleAppState();
}

class _ExampleAppState extends State<ExampleApp> {
  bool _closeToTray = false;

  @override
  Widget build(BuildContext context) {
    return SmoothWindowCloseScope(
      shouldCloseToTray: () => _closeToTray,
      onSaveState: () {
        debugPrint('Saving window state');
      },
      onCleanup: () async {
        debugPrint('Cleaning up');
        // Replace with database, socket, server, or other required cleanup.
        await Future<void>.value();
      },
      onError: (error, stackTrace) {
        debugPrint('Shutdown error: $error\n$stackTrace');
      },
      child: MaterialApp(
        title: 'smooth_window_close example',
        theme: ThemeData(colorSchemeSeed: Colors.blue, useMaterial3: true),
        home: ExamplePage(
          closeToTray: _closeToTray,
          onCloseToTrayChanged: (value) {
            setState(() => _closeToTray = value);
          },
        ),
      ),
    );
  }
}

class ExamplePage extends StatelessWidget {
  const ExamplePage({
    super.key,
    required this.closeToTray,
    required this.onCloseToTrayChanged,
  });

  final bool closeToTray;
  final ValueChanged<bool> onCloseToTrayChanged;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('smooth_window_close')),
      body: Center(
        child: ConstrainedBox(
          constraints: const BoxConstraints(maxWidth: 520),
          child: Padding(
            padding: const EdgeInsets.all(24),
            child: Column(
              mainAxisSize: MainAxisSize.min,
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: [
                const Text(
                  'Native X and Alt+F4 are handled automatically. The Windows '
                  'window hides before state saving and cleanup.',
                ),
                const SizedBox(height: 20),
                SwitchListTile(
                  contentPadding: EdgeInsets.zero,
                  title: const Text('Close to tray'),
                  subtitle: const Text(
                    'Demo has no tray icon; enable only to inspect hide '
                    'behavior. Process remains alive after X.',
                  ),
                  value: closeToTray,
                  onChanged: onCloseToTrayChanged,
                ),
                const SizedBox(height: 12),
                FilledButton.icon(
                  onPressed: SmoothWindowCloseScope.of(context).exit,
                  icon: const Icon(Icons.exit_to_app),
                  label: const Text('Explicit Exit'),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}