•void
CGrapheditView::OnLButtonDown(UINT nFlags, CPoint point)
•{ start_node =
pDoc->FindNode(point);
• if(start_node!=-1)
• { end_node = start_node;
• start_drag = end_drag =
• pDoc->nodes[start_node].p;
•
drag_arc();
•
SetCapture();
• captured
= true;
•} }