Add TrayIcon sample app

README.adoc

@@ -91,6 +91,18 @@ Each sample is tagged with it's difficulty. The degree of difficulty describes h
 
 |===
 
+=== DesktopIntegration-Samples
+
+[cols="25h,25,50"]
+|===
+| Sample | Difficulty | Buzz-Words 
+
+| link:src/Avalonia.Samples/Desktop/TrayIcon[Tray Icon Sample]
+| 🐣 Beginner
+| TrayIcon, ReactiveUI, Binding
+
+|===
+
 === ✒️ Drawing-Samples
 
 [cols="25h,25,50"]

src/Avalonia.Samples/Avalonia.Samples.sln

@@ -59,6 +59,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SimpleToDoList", "CompleteA
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "RectPainter", "Drawing\RectPainter\RectPainter.csproj", "{2B746401-384F-484A-810E-7A65288165E0}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TrayIcon", "DesktopIntegration\TrayIcon\TrayIcon.csproj", "{EB8D1498-2528-4FE5-B2B0-515293A8880C}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -137,6 +139,10 @@ Global
 		{2B746401-384F-484A-810E-7A65288165E0}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{2B746401-384F-484A-810E-7A65288165E0}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{2B746401-384F-484A-810E-7A65288165E0}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EB8D1498-2528-4FE5-B2B0-515293A8880C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EB8D1498-2528-4FE5-B2B0-515293A8880C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EB8D1498-2528-4FE5-B2B0-515293A8880C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EB8D1498-2528-4FE5-B2B0-515293A8880C}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

src/Avalonia.Samples/DesktopIntegration/TrayIcon/AboutWindow.axaml

@@ -0,0 +1,18 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        x:Class="TrayIcon.AboutWindow"
+        Title="Avalonia Tray Icon Sample"
+        Width="800" Height="400" WindowState="Normal" WindowStartupLocation="CenterScreen">
+  <Grid>
+    <Grid.RowDefinitions>
+      <RowDefinition Height="*" />
+      <RowDefinition Height="Auto" />
+    </Grid.RowDefinitions>
+
+    <Label FontSize="24" HorizontalContentAlignment="Center" VerticalContentAlignment="Center">
+      Avalonia Tray Icon Sample
+    </Label>
+
+    <Button Name="cmdClose" Click="cmdClose_Click" Grid.Row="1" Margin="30" HorizontalAlignment="Center">_Close</Button>
+  </Grid>
+</Window>

src/Avalonia.Samples/DesktopIntegration/TrayIcon/AboutWindow.axaml.cs

@@ -0,0 +1,18 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+
+namespace TrayIcon
+{
+    public partial class AboutWindow : Window
+    {
+        public AboutWindow()
+        {
+            InitializeComponent();
+        }
+
+        void cmdClose_Click(object? sender, RoutedEventArgs e)
+        {
+            this.Close();
+        }
+    }
+}

src/Avalonia.Samples/DesktopIntegration/TrayIcon/App.axaml

@@ -0,0 +1,25 @@
+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="using:TrayIcon"
+             x:Class="TrayIcon.App"
+             x:CompileBindings="true"
+             x:DataType="local:App"
+             RequestedThemeVariant="Default">
+    <Application.Styles>
+        <FluentTheme />
+    </Application.Styles>
+
+    <TrayIcon.Icons>
+        <TrayIcons>
+            <TrayIcon Icon="Icon.ico" ToolTipText="TrayIcon Sample">
+                <TrayIcon.Menu>
+                    <NativeMenu>
+                        <NativeMenuItem Header="_About" Command="{Binding AboutCommand}" />
+                        <NativeMenuItemSeparator />
+                        <NativeMenuItem Header="E_xit" Command="{Binding ExitCommand}" />
+                    </NativeMenu>
+                </TrayIcon.Menu>
+            </TrayIcon>
+        </TrayIcons>
+    </TrayIcon.Icons>
+</Application>

src/Avalonia.Samples/DesktopIntegration/TrayIcon/App.axaml.cs

@@ -0,0 +1,56 @@
+using System.Windows.Input;
+
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+using ReactiveUI;
+
+namespace TrayIcon
+{
+    public partial class App : Application
+    {
+        public override void Initialize()
+        {
+            AvaloniaXamlLoader.Load(this);
+        }
+
+        public App()
+        {
+            AboutCommand = ReactiveCommand.Create(ShowAboutWindow);
+            ExitCommand = ReactiveCommand.Create(ExitApplication);
+
+            DataContext = this;
+        }
+
+        public override void OnFrameworkInitializationCompleted()
+        {
+            if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+            {
+                _lifetime = desktop;
+
+                desktop.ShutdownMode = Avalonia.Controls.ShutdownMode.OnExplicitShutdown;
+            }
+
+            base.OnFrameworkInitializationCompleted();
+        }
+
+        IClassicDesktopStyleApplicationLifetime? _lifetime;
+
+        public ICommand AboutCommand { get; }
+        public ICommand ExitCommand { get; }
+
+        void ShowAboutWindow()
+        {
+            var window = new AboutWindow();
+
+            window.Show();
+        }
+
+        void ExitApplication()
+        {
+            _lifetime?.Shutdown();
+        }
+    }
+}
+

src/Avalonia.Samples/DesktopIntegration/TrayIcon/App.manifest

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <!-- This manifest is used on Windows only.
+       Don't remove it as it might cause problems with window transparency and embedded controls.
+       For more details visit https://learn.microsoft.com/en-us/windows/win32/sbscs/application-manifests -->
+  <assemblyIdentity version="1.0.0.0" name="DeltaQ.RTB.UserInterface.Desktop"/>
+
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <!-- A list of the Windows versions that this application has been tested on
+           and is designed to work with. Uncomment the appropriate elements
+           and Windows will automatically select the most compatible environment. -->
+
+      <!-- Windows 10 -->
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
+    </application>
+  </compatibility>
+</assembly>

src/Avalonia.Samples/DesktopIntegration/TrayIcon/AssemblyInfo.cs

@@ -0,0 +1 @@
+using System.Runtime.CompilerServices;

src/Avalonia.Samples/DesktopIntegration/TrayIcon/Program.cs

@@ -0,0 +1,25 @@
+using System;
+
+using Avalonia;
+
+namespace TrayIcon
+{
+	class Program
+	{
+		[STAThread]
+		public static void Main(string[] args)
+		{
+			var app = BuildAvaloniaApp();
+
+			app.StartWithClassicDesktopLifetime(args);
+		}
+
+		public static AppBuilder BuildAvaloniaApp()
+		{
+			return AppBuilder.Configure<App>()
+				.UsePlatformDetect()
+				.WithInterFont()
+				.LogToTrace();
+		}
+	}
+}

src/Avalonia.Samples/DesktopIntegration/TrayIcon/README.md

@@ -0,0 +1,7 @@
+# TrayIcon
+
+Sample application that shows a tray icon.
+
+* The tray icon must have an associated icon. The icon should be included in the project as an `<AvaloniaResource>`.
+* This sample sets the `DataContext` for `App` to `this`, which allows the command to be defined in the same class and then bound in the `.axaml` file. Consider using a separate view model in production code.
+

src/Avalonia.Samples/DesktopIntegration/TrayIcon/TrayIcon.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <IncludeAvaloniaGenerators>true</IncludeAvaloniaGenerators>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.2.0" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.2.0" />
+    <PackageReference Include="Avalonia.ReactiveUI" Version="11.2.0" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.2.0" />
+    <PackageReference Include="Avalonia.Diagnostics" Version="11.2.0" />
+    <PackageReference Include="Avalonia.Remote.Protocol" Version="11.2.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <AvaloniaResource Include="Icon.ico" />
+  </ItemGroup>
+</Project>