addRectShape backStep Create initialize m_startPt MgCmdDrawRect Name release touchBegan touchEnded touchMoved

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