void ArrowJunctionCanvas::delete_it() { unconnect(); DiagramCanvas::delete_it(); }
void SimpleRelationCanvas::history_hide() { Q3CanvasItem::setVisible(FALSE); unconnect(); }
void FlowCanvas::history_hide() { Q3CanvasItem::setVisible(FALSE); unconnect(); }
void ArrowJunctionCanvas::history_hide() { DiagramCanvas::setVisible(FALSE); unconnect(); }
void TransitionCanvas::history_hide() { QCanvasItem::setVisible(FALSE); unconnect(); }