Synnefo » Pithos MS Client

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

  }

}