protected override void CreateVertexControl(DisplayNode vertex) { base.CreateVertexControl(vertex); var newControl = VertexControls[vertex]; var isDrag = DragBehaviour.GetIsDragEnabled(newControl); DragBehaviour.SetIsDragEnabled(newControl, false); // newControl.MouseLeftButtonUp += OnVertexControlMouseLeftButtonUp; DragBehaviour.SetIsDragEnabled(newControl, isDrag); }