internal static void AddQueryContinueDragHandler(DependencyObject element, CustomQueryContinueDragEventHandler handler, bool handledEventsToo)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
if (handler == null)
{
throw new ArgumentNullException("handler");
}
CustomExtendedRoutedEventHandlerCollection<CustomQueryContinueDragEventHandler, CustomQueryContinueDragEventArgs> queryContinueDragHandlers = element.GetQueryContinueDragHandlers();
CustomExtendedRoutedEventHandlerCollection<CustomQueryContinueDragEventHandler, CustomQueryContinueDragEventArgs> handlers2 = queryContinueDragHandlers ?? new CustomExtendedRoutedEventHandlerCollection<CustomQueryContinueDragEventHandler, CustomQueryContinueDragEventArgs>((h, a) => h(element, a));
handlers2.Add(handler, handledEventsToo);
if (handlers2 != queryContinueDragHandlers)
{
element.SetValue(QueryContinueDragHandlerProperty, handlers2);
}
}
internal static void RemoveQueryContinueDragHandler(DependencyObject element, CustomQueryContinueDragEventHandler handler)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
if (handler == null)
{
throw new ArgumentNullException("handler");
}
CustomExtendedRoutedEventHandlerCollection<CustomQueryContinueDragEventHandler, CustomQueryContinueDragEventArgs> queryContinueDragHandlers = element.GetQueryContinueDragHandlers();
if (queryContinueDragHandlers != null)
{
queryContinueDragHandlers.Remove(handler);
}
}
/// <summary>
/// Adds a handler to the attached QueryContinueDrag event.
/// </summary>
/// <param name="element">The DependencyObject to attach an event handler for.</param>
/// <param name="handler">The event handler.</param>
/// <param name="handledEventsToo">A value Indicating whether to invoke the
/// handler if the event has been handled.</param>
internal static void AddQueryContinueDragHandler(DependencyObject element, QueryContinueDragEventHandler handler, bool handledEventsToo)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
if (handler == null)
{
throw new ArgumentNullException("handler");
}
ExtendedRoutedEventHandlerCollection<QueryContinueDragEventHandler, QueryContinueDragEventArgs> originalHandlers = element.GetQueryContinueDragHandlers();
ExtendedRoutedEventHandlerCollection<QueryContinueDragEventHandler, QueryContinueDragEventArgs> handlers = originalHandlers ?? new ExtendedRoutedEventHandlerCollection<QueryContinueDragEventHandler, QueryContinueDragEventArgs>((h, a) => h(element, a));
handlers.Add(handler, handledEventsToo);
if (handlers != originalHandlers)
{
element.SetValue(QueryContinueDragHandlerProperty, handlers);
}
}
