WPF NotifyIcon

--------------
ADD   Added ParentTaskbarIcon attached dependency property which is set for tooltips, popups, and custom balloons.
CHG   Made CloseBalloon public.
CHG   Changed sample, cleaned up commands pattern.


git-svn-id: https://svn.evolvesoftware.ch/repos/evolve.net/WPF/NotifyIcon@93 9f600761-6f11-4665-b6dc-0185e9171623

Source/Sample Project/FancyBalloon.xaml.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using Hardcodet.Wpf.TaskbarNotification;
+
+namespace Sample_Project
+{
+  /// <summary>
+  /// Interaction logic for FancyBalloon.xaml
+  /// </summary>
+  public partial class FancyBalloon : UserControl
+  {
+    #region BalloonText dependency property
+
+    /// <summary>
+    /// Description
+    /// </summary>
+    public static readonly DependencyProperty BalloonTextProperty =
+        DependencyProperty.Register("BalloonText",
+                                    typeof (string),
+                                    typeof (FancyBalloon),
+                                    new FrameworkPropertyMetadata(""));
+
+    /// <summary>
+    /// A property wrapper for the <see cref="BalloonTextProperty"/>
+    /// dependency property:<br/>
+    /// Description
+    /// </summary>
+    public string BalloonText
+    {
+      get { return (string) GetValue(BalloonTextProperty); }
+      set { SetValue(BalloonTextProperty, value); }
+    }
+
+    #endregion
+
+
+    public FancyBalloon()
+    {
+      InitializeComponent();
+    }
+
+
+    /// <summary>
+    /// Resolves the <see cref="TaskbarIcon"/> that displayed
+    /// the balloon and requests a close action.
+    /// </summary>
+    private void imgClose_MouseDown(object sender, MouseButtonEventArgs e)
+    {
+      //the tray icon assigned this attached property to simplify access
+      TaskbarIcon taskbarIcon = TaskbarIcon.GetParentTaskbarIcon(this);
+      taskbarIcon.CloseBalloon();
+    }
+  }
+}