Add tray status icons

WirelessTextSyncer.Windows/Tray/TrayApplicationContext.cs

@@ -8,6 +8,8 @@ public sealed class TrayApplicationContext : ApplicationContext
     private readonly WebSocketServerService server;
     private readonly DiscoveryResponderService discovery;
     private readonly NotifyIcon notifyIcon;
+    private readonly Icon connectedIcon;
+    private readonly Icon waitIcon;
     private ToolStripMenuItem? clipboardPasteMenuItem;
     private ToolStripMenuItem? sendInputTypingMenuItem;
 
@@ -18,12 +20,14 @@ public sealed class TrayApplicationContext : ApplicationContext
         var handler = new SyncMessageHandler(keyboard);
 
         server = new WebSocketServerService(handler);
-        server.StatusChanged += (_, _) => UpdateTrayText();
+        server.StatusChanged += (_, _) => UpdateTrayStatus();
         discovery = new DiscoveryResponderService(() => server.LocalIpAddress, () => server.Port);
+        connectedIcon = TrayIconFactory.CreateConnectedIcon();
+        waitIcon = TrayIconFactory.CreateWaitIcon();
 
         notifyIcon = new NotifyIcon
         {
-            Icon = SystemIcons.Application,
+            Icon = waitIcon,
             Text = "WirelessTextSyncer starting...",
             Visible = true,
             ContextMenuStrip = BuildMenu()
@@ -34,7 +38,7 @@ public sealed class TrayApplicationContext : ApplicationContext
         {
             server.Start(8181);
             discovery.Start();
-            UpdateTrayText();
+            UpdateTrayStatus();
         }
         catch (Exception ex)
         {
@@ -50,6 +54,8 @@ public sealed class TrayApplicationContext : ApplicationContext
         if (disposing)
         {
             notifyIcon.Dispose();
+            connectedIcon.Dispose();
+            waitIcon.Dispose();
             discovery.Dispose();
             server.Dispose();
         }
@@ -131,10 +137,12 @@ public sealed class TrayApplicationContext : ApplicationContext
         notifyIcon.ShowBalloonTip(1500);
     }
 
-    private void UpdateTrayText()
+    private void UpdateTrayStatus()
     {
-        var status = server.HasClient ? "connected" : "waiting";
+        var connected = server.HasClient;
+        var status = connected ? "connected" : "waiting";
         var text = $"WirelessTextSyncer {server.LocalIpAddress}:{server.Port} ({status})";
+        notifyIcon.Icon = connected ? connectedIcon : waitIcon;
         notifyIcon.Text = text.Length > 63 ? text[..63] : text;
     }
 }

WirelessTextSyncer.Windows/Tray/TrayIconFactory.cs

@@ -0,0 +1,50 @@
+using System.Drawing.Imaging;
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+namespace WirelessTextSyncer.Windows.Tray;
+
+internal static class TrayIconFactory
+{
+    private const string ConnectedResourceName = "WirelessTextSyncer.TrayConnected.png";
+    private const string WaitResourceName = "WirelessTextSyncer.TrayWait.png";
+
+    public static Icon CreateConnectedIcon()
+    {
+        return CreateIconFromResource(ConnectedResourceName);
+    }
+
+    public static Icon CreateWaitIcon()
+    {
+        return CreateIconFromResource(WaitResourceName);
+    }
+
+    private static Icon CreateIconFromResource(string resourceName)
+    {
+        var assembly = Assembly.GetExecutingAssembly();
+        using var stream = assembly.GetManifestResourceStream(resourceName)
+            ?? throw new InvalidOperationException($"Tray icon resource not found: {resourceName}");
+        using var source = new Bitmap(stream);
+        using var bitmap = new Bitmap(source.Width, source.Height, PixelFormat.Format32bppArgb);
+        using (var graphics = Graphics.FromImage(bitmap))
+        {
+            graphics.Clear(Color.Transparent);
+            graphics.DrawImage(source, 0, 0, source.Width, source.Height);
+        }
+
+        var handle = bitmap.GetHicon();
+        try
+        {
+            using var icon = Icon.FromHandle(handle);
+            return (Icon)icon.Clone();
+        }
+        finally
+        {
+            DestroyIcon(handle);
+        }
+    }
+
+    [DllImport("user32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    private static extern bool DestroyIcon(IntPtr handle);
+}