/// <summary> /// Updates the drag drop allowed properties. /// </summary> protected virtual void UpdateIsDragDropPossible() { CanonicSelection CanonicSelectedItemList = new CanonicSelection(CreateItemList()); if (GetCanonicSelectedItemList(CanonicSelectedItemList)) { DragSource.SetIsDragPossible(CanonicSelectedItemList); } else { DragSource.ClearIsDragPossible(); DragSource.ClearFlatDraggedItemList(); } }