public static bool Register(this IInputElement element, UIElement relativeTarget = null)
{
if (dragDatas.ContainsKey(element))
{
return(false);
}
dragDatas[element] = new DragData(element, relativeTarget);
element.MouseLeftButtonDown += Element_MouseLeftButtonDown;
element.PreviewMouseLeftButtonUp += Element_PreviewMouseLeftButtonUp;
element.PreviewMouseMove += Element_PreviewMouseMove;
return(true);
}
public DragEventArgs(RoutedEvent routedEvent, DragData data) : base(routedEvent, data)
{
}
private static void EndDrag(DragData item)
{
item.Stop();
item.IsDragging = false;
item.InputTarget.RaiseEvent(new DragEventArgs(DragEndEvent, item));
}