/// <summary>
/// A static helper method to raise the BeginDrag event on a target element.
/// </summary>
/// <param name="target">UIElement or ContentElement on which to raise the event</param>
/// <param name="device">The input device that owns the drag operation.</param>
/// <param name="dragOrigin">The origin of the drag operation relative to the input element raising the event.</param>
/// <param name="currentPosition">The current position of the input device relative to the input element raising the event.</param>
internal static BeginDragEventArgs RaiseBeginDragEvent(DependencyObject target, InputDevice device, Point dragOrigin, Point currentPosition)
{
if (target == null)
{
return(null);
}
BeginDragEventArgs args = new BeginDragEventArgs(device, dragOrigin, currentPosition);
args.RoutedEvent = BeginDragEvent;
RoutedEventHelper.RaiseEvent(target, args);
return(args);
}
private static void OnBeginDrag(object sender, BeginDragEventArgs e)
{
UIElement element = e.OriginalSource as UIElement;
LoopingListBox loopingListBox = sender as LoopingListBox;
if (loopingListBox != null &&
loopingListBox.LoopPanel != null &&
element != null)
{
Point origin = element.TranslatePoint(e.DragOrigin, loopingListBox.LoopPanel);
Point current = element.TranslatePoint(e.CurrentPosition, loopingListBox.LoopPanel);
loopingListBox.BeginDragOperation(e.Device, origin);
loopingListBox.UpdateDragPosition(current);
}
}
/// <summary>
/// A static helper method to raise the BeginDrag event on a target element.
/// </summary>
/// <param name="target">UIElement or ContentElement on which to raise the event</param>
/// <param name="device">The input device that owns the drag operation.</param>
/// <param name="dragOrigin">The origin of the drag operation relative to the input element raising the event.</param>
/// <param name="currentPosition">The current position of the input device relative to the input element raising the event.</param>
internal static BeginDragEventArgs RaiseBeginDragEvent(DependencyObject target, InputDevice device, Point dragOrigin, Point currentPosition)
{
if (target == null) return null;
BeginDragEventArgs args = new BeginDragEventArgs(device, dragOrigin, currentPosition);
args.RoutedEvent = BeginDragEvent;
RoutedEventHelper.RaiseEvent(target, args);
return args;
}
private static void OnBeginDrag(object sender, BeginDragEventArgs e)
{
UIElement element = e.OriginalSource as UIElement;
LoopingListBox loopingListBox = sender as LoopingListBox;
if (loopingListBox != null
&& loopingListBox.LoopPanel != null
&& element != null)
{
Point origin = element.TranslatePoint(e.DragOrigin, loopingListBox.LoopPanel);
Point current = element.TranslatePoint(e.CurrentPosition, loopingListBox.LoopPanel);
loopingListBox.BeginDragOperation(e.Device, origin);
loopingListBox.UpdateDragPosition(current);
}
e.Handled = true;
}
