Added application tray functionality

Author: RxmTaco

commet/lib/utils/window_management.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:io';
 
 import 'package:collection/collection.dart';
@@ -8,8 +9,11 @@ import 'package:commet/main.dart';
 import 'package:commet/utils/event_bus.dart';
 import 'package:flutter/services.dart';
 import 'package:window_manager/window_manager.dart';
+import 'package:tray_manager/tray_manager.dart';
 
 class WindowManagement {
+  static bool _isShuttingDown = false;
+
   static Future<void> init() async {
     if (!(PlatformUtils.isLinux || PlatformUtils.isWindows)) return;
 
@@ -24,11 +28,54 @@ class WindowManagement {
     EventBus.onSelectedRoomChanged.stream.listen(_onSelectedRoomChanged);
     EventBus.onSelectedSpaceChanged.stream.listen(_onSelectedSpaceChanged);
 
+    _registerProcessSignalHandlers();
+
+    await _initTrayManager();
+    TrayManager.instance.addListener(_TrayListener());
+
     if (commandLineArgs.contains("--minimize")) {
       windowManager.minimize();
     }
   }
 
+  static void _registerProcessSignalHandlers() {
+    ProcessSignal.sigint.watch().listen((_) {
+      _shutdownApplication();
+    });
+
+    ProcessSignal.sigterm.watch().listen((_) {
+      _shutdownApplication();
+    });
+  }
+
+  static Future<void> _shutdownApplication() async {
+    if (_isShuttingDown) return;
+    _isShuttingDown = true;
+
+    if (clientManager != null) {
+      for (var client in clientManager!.clients) {
+        await client.close();
+      }
+    }
+
+    exit(0);
+  }
+
+  static Future<void> _initTrayManager() async {
+    await TrayManager.instance.setIcon('assets/images/app_icon/app_icon_rounded.png');
+    await _setupTrayMenu();
+  }
+
+  static Future<void> _setupTrayMenu() async {
+    final menu = [
+      MenuItem(label: 'Commet', key: 'app_name', disabled: true),
+      MenuItem.separator(),
+      MenuItem(label: 'Open Commet', key: 'show'),
+      MenuItem(label: 'Quit Commet', key: 'close'),
+    ];
+    await TrayManager.instance.setContextMenu(Menu(items: menu));
+  }
+
   static bool _onKeyEvent(KeyEvent event) {
     if (event is KeyDownEvent && event.logicalKey == LogicalKeyboardKey.f11) {
       _toggleFullscreen();
@@ -71,15 +118,41 @@ class _WindowListener extends WindowListener {
     super.onWindowClose();
 
     if (preferences.minimizeOnClose.value) {
-      windowManager.minimize();
+      windowManager.hide();
     } else {
-      if (clientManager != null) {
-        for (var client in clientManager!.clients) {
-          await client.close();
-        }
-      }
+      await WindowManagement._shutdownApplication();
+    }
+  }
+}
+
+class _TrayListener extends TrayListener {
+  @override
+  void onTrayIconMouseDown() {
+    _showWindow();
+  }
 
-      exit(0);
+  @override
+  void onTrayMenuItemClick(MenuItem menuItem) {
+    switch (menuItem.key) {
+      case 'show':
+        _showWindow();
+        break;
+      case 'close':
+        _closeApplication();
+        break;
     }
   }
+
+  Future<void> _showWindow() async {
+    if (await windowManager.isVisible()) {
+      await windowManager.focus();
+    } else {
+      await windowManager.show();
+      await windowManager.focus();
+    }
+  }
+
+  Future<void> _closeApplication() async {
+    await WindowManagement._shutdownApplication();
+  }
 }

commet/pubspec.yaml

@@ -48,6 +48,7 @@ dependencies:
   url_launcher: ^6.1.11
   win_toast: ^0.4.0
   window_manager: ^0.5.1
+  tray_manager: ^0.5.2
   flutter: 
     sdk: flutter
   flutter_highlighter: