fix: Ignore the desktop window for widget

Author: devohmycode

TaskbarWidget.xaml.cs

@@ -211,6 +211,13 @@ private bool IsFullscreenAppActive()
         var fgHwnd = GetForegroundWindow();
         if (fgHwnd == IntPtr.Zero || fgHwnd == _hWnd) return false;
 
+        // Ignore the desktop window (clicking the desktop should not hide the widget)
+        if (fgHwnd == GetShellWindow()) return false;
+        var className = new System.Text.StringBuilder(256);
+        GetClassName(fgHwnd, className, className.Capacity);
+        var cls = className.ToString();
+        if (cls is "Progman" or "WorkerW") return false;
+
         if (!GetWindowRect(fgHwnd, out var wndRect)) return false;
 
         // Get the monitor that contains the foreground window
@@ -895,6 +902,12 @@ private static extern int DwmSetWindowAttribute(IntPtr hwnd, int attribute,
     [DllImport("user32.dll")]
     private static extern IntPtr GetForegroundWindow();
 
+    [DllImport("user32.dll")]
+    private static extern IntPtr GetShellWindow();
+
+    [DllImport("user32.dll", CharSet = CharSet.Unicode)]
+    private static extern int GetClassName(IntPtr hWnd, System.Text.StringBuilder lpClassName, int nMaxCount);
+
     [DllImport("user32.dll")]
     private static extern IntPtr MonitorFromWindow(IntPtr hwnd, uint dwFlags);