public static void Track(MouseEventArgs e)
{
if (_dragElement == null)
{
return;
}
if (e.LeftButton != MouseButtonState.Pressed)
{
_dragElement = null;
return;
}
var diff = e.GetPosition(null) - _pt;
if (Math.Abs(diff.X) < SystemParameters.MinimumHorizontalDragDistance &&
Math.Abs(diff.Y) < SystemParameters.MinimumVerticalDragDistance)
{
return;
}
DragDrop.DoDragDrop((FrameworkElement)e.Source, _dragElement, DragEffect);
}
public static void SetClick(DragProcessor.DragElement dragElement, MouseButtonEventArgs e)
{
_pt = e.GetPosition(null);
_dragElement = dragElement;
}
