backStep canAddPoint cancel click Create draw initialize m_freehand MgCmdDrawSplines mouseHover Name release touchBegan touchEnded touchMoved ~MgCmdDrawSplines

MgCmdDrawSplines() MgCmdDrawSplines::MgCmdDrawSplines ( const char *  name = Name(), bool  freehand = true  ) protected 这是这个函数的调用关系图: