backStep canAddPoint cancel checkClosed click Create doubleClick draw initialize m_index MgCmdDrawLines Name needCheckClosed needEnded release touchBegan touchEnded touchMoved ~MgCmdDrawLines

needCheckClosed() virtual bool MgCmdDrawLines::needCheckClosed ( ) privatevirtual 被 MgCmdDrawPolygon 重载. 这是这个函数的调用关系图: