_cmdname _cmds _drawcmd _factories _guildpt _ignoreStart _newShapeID _ptSnap _snapBase _snapHandle _snapHandleSrc _snapShapeId _snapType _startpt _subject addImageShape addImageShape cancel checkResult clearSnap CMDS displayMmToModel displayMmToModel doAction doContextAction drawPerpMark drawPerpMark drawSnap dynamicChangeEnded eraseWnd Factories findCommand freeSubject getActionDispatcher getBoundingBox getCmdSubject getCommand getCommandName getCommandName getNewShapeID getSelection getSelection getSelectionForChange getSnap getSnapOptions getSnappedHandle getSnappedPoint getSnappedPoint getSnappedType MgCmdManagerImpl registerCommand release setCommand setIgnoreStartPoint setNewShapeID setSnapOptions showInDrawing showInSelect snapPoint switchCommand unloadCommands ~MgCmdManagerImpl

snapPoint() Point2d MgCmdManagerImpl::snapPoint ( const MgMotion *  sender, const Point2d &  orignPt, const MgShape *  shape, int  hotHandle, int  ignoreHandle = -1, const int *  ignoreids = NULL  ) privatevirtual 根据当前点捕捉新的坐标 实现了 MgSnap. 函数调用图: 这是这个函数的调用关系图: