_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

drawPerpMark() [1/2] bool MgCmdManagerImpl::drawPerpMark ( GiGraphics *  gs, const GiContext &  ctx, const Point2d &  a, const Point2d &  b, const Point2d &  perp, const Point2d &  c, float  len  ) const privatevirtual 显示垂足标志(90度折线), perp为perp-c与a-b相交的垂足 实现了 MgSnap. 函数调用图: 这是这个函数的调用关系图: