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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

    }

}