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

touchBegan() bool MgCmdDrawLines::touchBegan ( const MgMotion *  sender ) privatevirtual 开始滑动 重载 MgCommandDraw . 函数调用图: 这是这个函数的调用关系图: