New feature: system tray icon

src/App.Commands.cs

@@ -37,7 +37,8 @@ public static bool IsCheckForUpdateCommandVisible
             }
         }
 
-        public static readonly Command OpenPreferenceCommand = new Command(_ => OpenDialog(new Views.Preference()));
+        public static readonly Command Unminimize = new Command(_ => ShowWindow());
+        public static readonly Command OpenPreferenceCommand = new Command(_ => { ShowWindow(); OpenDialog(new Views.Preference()); });
         public static readonly Command OpenHotkeysCommand = new Command(_ => OpenDialog(new Views.Hotkeys()));
         public static readonly Command OpenAppDataDirCommand = new Command(_ => Native.OS.OpenInFileManager(Native.OS.DataDir));
         public static readonly Command OpenAboutCommand = new Command(_ => OpenDialog(new Views.About()));

src/App.axaml.cs

@@ -14,6 +14,8 @@
 using Avalonia.Markup.Xaml;
 using Avalonia.Media;
 using Avalonia.Media.Fonts;
+using Avalonia.Media.Imaging;
+using Avalonia.Platform;
 using Avalonia.Platform.Storage;
 using Avalonia.Styling;
 using Avalonia.Threading;
@@ -85,6 +87,7 @@ public override void Initialize()
             SetLocale(pref.Locale);
             SetTheme(pref.Theme, pref.ThemeOverrides);
             SetFonts(pref.DefaultFontFamily, pref.MonospaceFontFamily, pref.OnlyUseMonoFontInEditor);
+            SetupTrayIcon(pref.SystemTrayIcon);
         }
 
         public override void OnFrameworkInitializationCompleted()
@@ -192,6 +195,34 @@ public static void SetTheme(string theme, string themeOverridesFile)
             }
         }
 
+        public static void SetupTrayIcon(bool enable)
+        {
+            if (enable)
+            {
+                var icons = new TrayIcons {
+                    new TrayIcon {
+                        Icon = new WindowIcon(new Bitmap(AssetLoader.Open(new Uri("avares://SourceGit/App.ico")))),
+                        Menu = [
+                            new NativeMenuItem(Text("Open")) {Command = Unminimize},
+                            new NativeMenuItem(Text("Preference")) {Command = OpenPreferenceCommand},
+                            new NativeMenuItemSeparator(),
+                            new NativeMenuItem(Text("Quit")) {Command = QuitCommand},
+                        ]
+                    }
+                };
+                icons[0].Clicked += (_, _) => ShowWindow();
+                TrayIcon.SetIcons(Current, icons);
+            }
+        }
+        private static void ShowWindow()
+        {
+            if (Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop) {
+                desktop.MainWindow.WindowState = WindowState.Normal;
+                desktop.MainWindow.Show();
+                desktop.MainWindow.BringIntoView();
+                desktop.MainWindow.Focus();
+            }
+        }
         public static void SetFonts(string defaultFont, string monospaceFont, bool onlyUseMonospaceFontInEditor)
         {
             var app = Current as App;
@@ -545,11 +576,15 @@ private void TryLaunchedAsNormal(IClassicDesktopStyleApplicationLifetime desktop
             if (desktop.Args != null && desktop.Args.Length == 1 && Directory.Exists(desktop.Args[0]))
                 startupRepo = desktop.Args[0];
 
+            var pref = ViewModels.Preference.Instance;
+            if (pref.SystemTrayIcon) {
+                desktop.ShutdownMode = ShutdownMode.OnExplicitShutdown;
+            }
+
             _launcher = new ViewModels.Launcher(startupRepo);
             desktop.MainWindow = new Views.Launcher() { DataContext = _launcher };
 
         #if !DISABLE_UPDATE_DETECTION
-            var pref = ViewModels.Preference.Instance;
             if (pref.ShouldCheck4UpdateOnStartup())
                 Check4Update();
         #endif

src/Resources/Locales/en_US.axaml

@@ -420,6 +420,7 @@
   <x:String x:Key="Text.MoveRepositoryNode.Target" xml:space="preserve">Select parent node for:</x:String>
   <x:String x:Key="Text.Name" xml:space="preserve">Name:</x:String>
   <x:String x:Key="Text.NotConfigured" xml:space="preserve">Git has NOT been configured. Please to go [Preference] and configure it first.</x:String>
+  <x:String x:Key="Text.Open" xml:space="preserve">Open SourceGit</x:String>
   <x:String x:Key="Text.OpenAppDataDir" xml:space="preserve">Open Data Storage Directory</x:String>
   <x:String x:Key="Text.OpenWith" xml:space="preserve">Open with...</x:String>
   <x:String x:Key="Text.Optional" xml:space="preserve">Optional.</x:String>

src/ViewModels/Preference.cs

@@ -333,6 +333,12 @@ public double LastCheckUpdateTime
             set => SetProperty(ref _lastCheckUpdateTime, value);
         }
 
+        public bool SystemTrayIcon 
+        {
+            get => _systemTrayIcon;
+            set => SetProperty(ref _systemTrayIcon, value);
+        }
+
         public bool IsGitConfigured()
         {
             var path = GitInstallPath;
@@ -663,5 +669,7 @@ private string FixFontFamilyName(string name)
         private string _externalMergeToolPath = string.Empty;
 
         private uint _statisticsSampleColor = 0xFF00FF00;
+
+        private bool _systemTrayIcon = false;
     }
 }

src/Views/Launcher.axaml.cs

@@ -255,7 +255,13 @@ protected override void OnKeyUp(KeyEventArgs e)
 
         protected override void OnClosing(WindowClosingEventArgs e)
         {
-            (DataContext as ViewModels.Launcher)?.Quit(Width, Height);
+            var pref = ViewModels.Preference.Instance;
+            if (pref.SystemTrayIcon) {
+                e.Cancel = true;
+                Hide();
+            } else {
+                (DataContext as ViewModels.Launcher)?.Quit(Width, Height);
+            }
             base.OnClosing(e);
         }