_getHandleCount _getHandlePoint _getHandleType _hitTestBox _isHandleFixed _load _output _points _save _setHandlePoint _subtype angle center endPoint getPoints getSubType isBeeline isRayline length setBeeline setEndPoint setRayline setStartPoint startPoint

getSubType() virtual int MgLine::getSubType ( ) const virtual 子类型，由具体图形类解释含义 重载 MgBaseShape .