public DragInfo(Point startPoint, Thumb draggedElement, RadWindow window)
{
this.MousePosition = this.StartPoint = startPoint;
this.DraggedElement = draggedElement;
this.DraggedThumbType = RadWindow.GetThumbType(draggedElement);
if (this.DraggedThumbType != ThumbType.NONE)
{
this.InitialRectangle =
new Rect(window.Left,
window.Top,
double.IsNaN(window.Width) ? window.ActualWidth : window.Width,
double.IsNaN(window.Height) ? window.ActualHeight : window.Height);
}
}