/// <summary>
/// preparing for an edge corner dragging
/// </summary>
/// <param name="affectedObjects"></param>
/// <param name="geometryEdge"></param>
/// <param name="site"></param>
/// <returns></returns>
public UndoRedoAction PrepareForEdgeCornerDragging(Set <object> affectedObjects,
GeomEdge geometryEdge, Site site)
{
this.EditedEdge = geometryEdge;
UndoRedoAction edgeDragUndoRedoAction = (EdgeDragUndoRedoAction)CreateEdgeEditUndoRedoAction(affectedObjects);
EdgeRestoreData edgeRestoreDate = (EdgeRestoreData)edgeDragUndoRedoAction.GetRestoreData(geometryEdge);
edgeRestoreDate.Site = site;
return(InsertToListAndFixTheBox(edgeDragUndoRedoAction));
}
