WPF NotifyIcon

--------------
Initial import

git-svn-id: https://svn.evolvesoftware.ch/repos/evolve.net/WPF/NotifyIcon@52 9f600761-6f11-4665-b6dc-0185e9171623

Source/NotifyIconWpf/RoutedEventHelper.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Windows;
+
+namespace Hardcodet.Wpf.TaskbarNotification
+{
+  /// <summary>
+  /// Helper class used by routed events of the
+  /// <see cref="TaskbarIcon"/> class.
+  /// </summary>
+  internal static class RoutedEventHelper
+  {
+    #region RoutedEvent Helper Methods
+
+    /// <summary>
+    /// A static helper method to raise a routed event on a target UIElement or ContentElement.
+    /// </summary>
+    /// <param name="target">UIElement or ContentElement on which to raise the event</param>
+    /// <param name="args">RoutedEventArgs to use when raising the event</param>
+    internal static void RaiseEvent(DependencyObject target, RoutedEventArgs args)
+    {
+      if (target is UIElement)
+      {
+        (target as UIElement).RaiseEvent(args);
+      }
+      else if (target is ContentElement)
+      {
+        (target as ContentElement).RaiseEvent(args);
+      }
+    }
+
+    /// <summary>
+    /// A static helper method that adds a handler for a routed event 
+    /// to a target UIElement or ContentElement.
+    /// </summary>
+    /// <param name="element">UIElement or ContentElement that listens to the event</param>
+    /// <param name="routedEvent">Event that will be handled</param>
+    /// <param name="handler">Event handler to be added</param>
+    internal static void AddHandler(DependencyObject element, RoutedEvent routedEvent, Delegate handler)
+    {
+      UIElement uie = element as UIElement;
+      if (uie != null)
+      {
+        uie.AddHandler(routedEvent, handler);
+      }
+      else
+      {
+        ContentElement ce = element as ContentElement;
+        if (ce != null)
+        {
+          ce.AddHandler(routedEvent, handler);
+        }
+      }
+    }
+
+    /// <summary>
+    /// A static helper method that removes a handler for a routed event 
+    /// from a target UIElement or ContentElement.
+    /// </summary>
+    /// <param name="element">UIElement or ContentElement that listens to the event</param>
+    /// <param name="routedEvent">Event that will no longer be handled</param>
+    /// <param name="handler">Event handler to be removed</param>
+    internal static void RemoveHandler(DependencyObject element, RoutedEvent routedEvent, Delegate handler)
+    {
+      UIElement uie = element as UIElement;
+      if (uie != null)
+      {
+        uie.RemoveHandler(routedEvent, handler);
+      }
+      else
+      {
+        ContentElement ce = element as ContentElement;
+        if (ce != null)
+        {
+          ce.RemoveHandler(routedEvent, handler);
+        }
+      }
+    }
+
+    #endregion
+  }
+}