Growl multi-window support

HandyControlDemo/MainWindow.xaml.cs

@@ -1,4 +1,7 @@
-namespace HandyControlDemo
+using System;
+using HandyControl.Controls;
+
+namespace HandyControlDemo
 {
     public partial class MainWindow
     {
@@ -6,5 +9,19 @@
         {
             InitializeComponent();
         }
+
+        protected override void OnActivated(EventArgs e)
+        {
+            base.OnActivated(e);
+
+            Growl.SetGrowlParent(GrowlPanel, true);
+        }
+
+        protected override void OnDeactivated(EventArgs e)
+        {
+            base.OnDeactivated(e);
+
+            Growl.SetGrowlParent(GrowlPanel, false);
+        }
     }
 }