自学教程：C++ AcDbObjectId类代码示例

// 从图元的扩展词典中查找数据对象static void GetDataObjectFromExtDict( AcDbObjectIdArray& dbObjIds ){    AcDbObjectIdArray allObjIds;    ArxDataTool::GetEntsByType( _T( "MineGE" ), allObjIds, true );    // 判断是否数据对象DataObject    // 且类型名称==type    if( allObjIds.isEmpty() ) return;    AcTransaction* pTrans = actrTransactionManager->startTransaction();    if( pTrans == 0 ) return;    int len = allObjIds.length();    for( int i = 0; i < len; i++ )    {        AcDbObject* pObj;        if( Acad::eOk != pTrans->getObject( pObj, allObjIds[i], AcDb::kForRead ) ) continue;        MineGE* pGE = MineGE::cast( pObj );        if( pGE == 0 ) continue;        AcDbObjectId dbObjId = pGE->getDataObject();        if( !dbObjId.isNull() )        {            dbObjIds.append( dbObjId );        }    }    actrTransactionManager->endTransaction();}

void DrawMText( AcGiWorldDraw* mode, const AcGePoint3d& pt, double angle, const CString& str, double height, AcDbMText::AttachmentPoint ap, const CString& style ){    //acutPrintf(_T("/n绘制前--文字颜色:%d"), mode->subEntityTraits().color());    AcDbMText mt; //   //AcDbObjectId style; // 文字样式	AcDbObjectId fontId = GetTextStyle(style);	if(!fontId.isNull())	{		acutPrintf(_T("/n设置样式为罗马字体"));		mt.setTextStyle(fontId);	}    mt.setLocation( pt );    mt.setTextHeight( height );	mt.setAttachment( ap );    mt.setRotation( angle );    mt.setContents( str );    // 经过测试发现，AcDbMText调用worldDraw的同时会修改mode的一些属性    mt.setColorIndex( mode->subEntityTraits().color() );	    mt.worldDraw( mode );    //acutPrintf(_T("/n绘制后--文字颜色:%d"), mode->subEntityTraits().color());}

void DrawCmd::DrawLocalFan(){    AcDbObjectId objId = ArxUtilHelper::SelectObject( _T( "请选择一个掘进工作面:" ) );    if( objId.isNull() ) return;    if( !ArxUtilHelper::IsEqualType( _T( "TTunnel" ), objId ) ) return;    AcDbObjectIdArray objIds;    DrawHelper::GetTagGEById2( objId, _T( "LocalFan" ), objIds );    if( !objIds.isEmpty() )    {        AfxMessageBox( _T( "该掘进工作面已设置了局部通风机!" ) );        return;    }    AcGePoint3d pt;    if( !ArxUtilHelper::PromptPt( _T( "/n请指定局扇的插入点坐标:" ), pt ) ) return;    Fan* pFan = new LocalFan( pt, 0 ); // 目前假设局扇的角度为0(实际绘图中局扇是没有方向的)    if( pFan == 0 ) return;    pFan->setRelatedGE( objId ); // 关联巷道    // 初始化并提交到数据库    if( !ArxUtilHelper::PostToModelSpace( pFan ) ) delete pFan;}

voidAsdkWblockReactor::otherWblock(AcDbDatabase*  pDestDb,                               AcDbIdMapping& idMap,                               AcDbDatabase*  pSrcDb){    AcDbBlockTable       *pDestBlockTable;    AcDbBlockTableRecord *pDestBTR;    pDestDb->getSymbolTable(pDestBlockTable, AcDb::kForRead);    pDestBlockTable->getAt(ACDB_MODEL_SPACE,        pDestBTR, AcDb::kForRead);    pDestBlockTable->close();    // Now pDestBTR is pointing to pSrcDb database's Model    // Space not to the destination database's Model Space!    // The code above is not correct!// END CODE APPEARING IN SDK DOCUMENT.    acutPrintf("/nIncorrect destination BTR's ObjectId is /t/t%Ld",        pDestBTR->objectId().asOldId());    pDestBTR->close();    AcDbBlockTable *pSrcBlockTable;    AcDbObjectId    srcModelSpaceId;    pSrcDb->getSymbolTable(pSrcBlockTable, AcDb::kForRead);    pSrcBlockTable->getAt(ACDB_MODEL_SPACE,        srcModelSpaceId);    pSrcBlockTable->close();    acutPrintf("/nSource Database's Model Space BTR's ObjectId is /t%Ld",        srcModelSpaceId.asOldId());}

void DrawCmd::DrawJoint(){	AcDbObjectId objId = ArxUtilHelper::SelectObject( _T( "请选择一条巷道、或掘进工作面:" ) );	if( objId.isNull() ) return;	if( !ArxUtilHelper::IsEqualType( _T( "LinkedGE" ), objId ) ) return;	AcTransaction* pTrans = actrTransactionManager->startTransaction();	if( pTrans == 0 ) return;	AcDbObject* pObj;	if( Acad::eOk != pTrans->getObject( pObj, objId, AcDb::kForWrite ) )	{		actrTransactionManager->abortTransaction();		return;	}	LinkedGE* pEdge = LinkedGE::cast( pObj );	if( pEdge == 0 )	{		actrTransactionManager->abortTransaction();		return;	}	actrTransactionManager->endTransaction();	AcGePoint3d spt,ept;	pEdge->getSEPoint(spt,ept);	AcGePoint3d pt;	if( !PromptInsertPt( objId, pt ) ) return;	double angle;	if( !GetClosePtAndAngle( objId, pt, angle ) ) return;	SplitByPoint(objId,spt,ept,pt);	CreatJoint( objId, pt, angle );}

void WindStationDockBarChildDlg::OnBnClickedAirSelBtn(){    // 拾取按钮    //BeginEditorCommand();    AcDbObjectId objId = ArxUtilHelper::SelectObject( _T( "请选择一条巷道: " ) );    //CompleteEditorCommand();    if( !objId.isNull() )    {        //MessageBox(_T("拾取成功"));        int pos = m_objIds.find( objId );        if( pos != -1 )        {            //滚动条自动滚动该行,并选中            m_list.EnsureVisible( pos, FALSE );            m_list.SetItemState( pos, LVIS_SELECTED, LVIS_SELECTED );            // 取消选中            //m_list.SetItemState(pos, NULL, NULL);        }    }    else    {        MessageBox( _T( "拾取失败" ) );    }}

AcDbObjectId DoubleLine::draw(){    //计算始端的2个坐标    AcGePoint3d m_leftStartPt, m_leftEndPt;    AcGePoint3d m_rightStartPt, m_rightEndPt;    caclStartPoint( m_leftStartPt, m_rightStartPt );    //计算末端的2个坐标    caclEndPoint( m_leftEndPt, m_rightEndPt );    //绘制2条直线    AcDbObjectId line1 = ArxDrawHelper::DrawLine( m_leftStartPt, m_leftEndPt );    AcDbObjectId line2 = ArxDrawHelper::DrawLine( m_rightStartPt, m_rightEndPt );    //构造group    AcDbObjectIdArray objIds;    objIds.append( line1 );    objIds.append( line2 );    //构造临时的组名    CString name;    name.Format( _T( "巷道%d" ), count++ );    AcDbObjectId groupId = ArxGroupHelper::CreateGroup( name, objIds );    if( !groupId.isNull() )    {        ArxGroupHelper::ConvertToAnonymousGroup( groupId );    }    return groupId;}

void BlockDraw::explodeBlock( AcGeVoidPointerArray& ents ){    // 填充属性数据    AcStringArray names;    regPropertyDataNames( names );    if( names.isEmpty() )    {        acutPrintf( _T( "/n没有注册要提取的字段..." ) );        return;    }    if( names.length() != m_attValues.length() )    {        acutPrintf( _T( "/n注册的属性数据与读取的数据个数不相等!" ) );        return;    }    AcDbObjectId blkId = GetBlockDefinitionByName( m_blockName );    if( blkId.isNull() )    {        acutPrintf( _T( "/n未知的块定义:%s" ), m_blockName );        return;    }    // 计算变换矩阵    AcGeMatrix3d blkXform = GetBlockTransformMatrix( blkId, m_insertPt, m_angle, m_scale );    // 分解块定义    BlockToEntity( blkId, blkXform, names, m_attValues, ents );}

void DrawCmd::DrawChimney( void ){    acutPrintf( _T( "/n绘制风筒测试..." ) );    AcDbObjectId objId = ArxUtilHelper::SelectObject( _T( "请选择一个掘进工作面:" ) );    if( objId.isNull() ) return;    if( !ArxUtilHelper::IsEqualType( _T( "TTunnel" ), objId ) ) return;    AcDbObjectIdArray objIds;    DrawHelper::GetTagGEById2( objId, _T( "Chimney" ), objIds );    if( !objIds.isEmpty() )    {        AfxMessageBox( _T( "该掘进工作面已设置了风筒!" ) );        return;    }    AcGePoint3dArray pts;    PolyLineJig jig;    if( !jig.doJig( pts ) ) return;    int len = pts.length();    acutPrintf( _T( "/n点个数:%d" ), len );    if( len < 2 ) return;    Chimney* pChimney = new Chimney();    pChimney->setRelatedGE( objId ); // 关联的图元必须是掘进工作面    for( int i = 0; i < len; i++ ) pChimney->addControlPoint( pts[i] );    // 初始化并提交到数据库    if( !ArxUtilHelper::PostToModelSpace( pChimney ) ) delete pChimney;}

Acad::ErrorStatusArxDbgPersistentObjReactor::dxfInFields(AcDbDxfFiler* filer){    Acad::ErrorStatus es;    if (((es = AcDbObject::dxfInFields(filer)) != Acad::eOk) ||        (filer->atSubclassData(this->desc()->name()) != Adesk::kTrue))        return filer->filerStatus();    resbuf rb;	m_attachedToObjs.setLogicalLength(0);    while ((es == Acad::eOk) && ((es = filer->readResBuf(&rb)) == Acad::eOk)) {        if (rb.restype == AcDb::kDxfSoftPointerId) {            AcDbObjectId tmpId;            tmpId.setFromOldId(rb.resval.rlong);            if (tmpId.isNull() == false)                m_attachedToObjs.append(tmpId);        }        else {            filer->pushBackItem();            es = Acad::eEndOfFile;        }    }    if (es != Acad::eEndOfFile)        return Acad::eInvalidResBuf;    return filer->filerStatus();}

Acad::ErrorStatusArxDbgDbAdeskLogoStyle::dxfInFields(AcDbDxfFiler* filer){    Acad::ErrorStatus es;    if (((es = ArxDbgDbDictRecord::dxfInFields(filer)) != Acad::eOk) ||        (filer->atSubclassData(this->desc()->name()) != Adesk::kTrue))        return filer->filerStatus();    resbuf rb;    while ((es == Acad::eOk) && ((es = filer->readResBuf(&rb)) == Acad::eOk)) {        if (rb.restype == kDxfSolidFill) {			bool doSolidFill = (rb.resval.rint == 0) ? false : true;            setSolidFill(doSolidFill);		}        else if (rb.restype == kDxfLabel)            setLabel(rb.resval.rstring);        // NOTE: normally have to free string from resbuf... not in this case, DXF Filer does        else if (rb.restype == kDxfTextStyle) {            AcDbObjectId tmpId;            tmpId.setFromOldId(rb.resval.rlong);            setTextStyleId(tmpId);        }        else {            filer->pushBackItem();            es = Acad::eEndOfFile;        }    }    if (es != Acad::eEndOfFile)        return Acad::eInvalidResBuf;    return filer->filerStatus();}

ArxDictTool2* ArxDictTool2::GetDictTool( const CString& dictName ){    AcDbObjectId dictId = ArxDictTool::GetDict( dictName );    if( dictId.isNull() )        return 0;    else        return new ArxDictTool2( dictId );}

void UIHelper::DisplayData(){    // 显示图元的属性数据    AcDbObjectId objId = ArxUtilHelper::SelectObject( _T( "请选择一个图元:" ) );    if( objId.isNull() ) return;    PropertyDataDlgHelper::DisplayPropertyDataDlg( objId );}

    // ----- AsdkSelectionFilterUI.SubentSel command (do not rename)    static void AsdkSelectionFilterUI_SubentSel(void)    {        // we have to allow duplicates; otherwise, the xref would be selectable        // only once (because the main entity is the one that counts).        setAllowDuplicateSelection(curDoc(), true);        ads_name sset, eName;        AcDbObjectId id;        // "_:n" gives us nested entities        //        if (RTNORM == acedSSGet("_:n", NULL, NULL, NULL, sset))        {            acutPrintf("/n");            long len = 0;            acedSSLength(sset, &len);            for (long i = 0; i < len; i++)// For each entity in sset            {                resbuf *rb = NULL;                // We use ssnamex() here, because the regular ssname()                // would give only the main entity (the xref)                //                if (RTNORM == acedSSNameX(&rb, sset, i))//Get the sub entity                {                    resbuf *rbWalk = rb;                    while (NULL != rbWalk)                    {                        if (RTENAME == rbWalk->restype)                        {                            eName[0] = rbWalk->resval.rlname[0];                            eName[1] = rbWalk->resval.rlname[1];                            if(Acad::eOk == acdbGetObjectId(id, eName))                            {                                acutPrintf("Entity %d: <%x>", i, id.asOldId());                                AcDbEntity *pEnt;                                if (Acad::eOk == acdbOpenObject(pEnt, id, AcDb::kForRead))                                {                                    acutPrintf("(%s)/n", pEnt->isA()->name());                                    pEnt->close();                                }                                else                                    acutPrintf("/nCouldn't open object");                            }                            rbWalk = NULL; //force quit out of loop                        }                        else                            rbWalk = rbWalk->rbnext;                    }                    acutRelRb(rb);                }            }            acedSSFree(sset);        }        setAllowDuplicateSelection(curDoc(), false);    }

voidAsdkWblockReactor::otherWblock(AcDbDatabase*  pDestDb,                               AcDbIdMapping& idMap,                               AcDbDatabase*  pSrcDb){    // To find the destination Model Space,  you must look    // it up in the ID map:    AcDbBlockTable *pSrcBlockTable;    pSrcDb->getSymbolTable(pSrcBlockTable, AcDb::kForRead);    AcDbObjectId srcModelSpaceId;    pSrcBlockTable->getAt(ACDB_MODEL_SPACE,        srcModelSpaceId);    pSrcBlockTable->close();    AcDbIdPair idPair;    idPair.setKey(srcModelSpaceId);    idMap.compute(idPair);    AcDbBlockTableRecord *pDestBTR;    acdbOpenAcDbObject((AcDbObject*&)pDestBTR,        idPair.value(), AcDb::kForRead, Adesk::kTrue);// END CODE APPEARING IN SDK DOCUMENT.    acutPrintf("/nCorrect destination BTR's ObjectId is:/t/t%Ld",        pDestBTR->objectId().asOldId());    pDestBTR->close();    // Incorrect way done here so that the wrong value can be    // compared to the correct value    //    AcDbBlockTable *pDestBlockTable;    pDestDb->getSymbolTable(pDestBlockTable, AcDb::kForRead);    pDestBlockTable->getAt(ACDB_MODEL_SPACE,        pDestBTR, AcDb::kForRead);    pDestBlockTable->close();	acutPrintf("/nIncorrect destination BTR's ObjectId is /t/t%Ld",        pDestBTR->objectId().asOldId());    	pDestBTR->close();    // source database Model Space BTR's ObjectId is shown to    // demonstrate that this is what the incorrect method gets    //    pSrcDb->getSymbolTable(pSrcBlockTable, AcDb::kForRead);    pSrcBlockTable->getAt(ACDB_MODEL_SPACE,        srcModelSpaceId);    pSrcBlockTable->close();    acutPrintf("/nSource Database's Model Space BTR's ObjectId is /t%Ld",        srcModelSpaceId.asOldId());}

void CMyDlg::UpdateListCtr(){	acDocManager->lockDocument(curDoc());	int nCount = m_ListCtr.GetItemCount();	acutPrintf("%d/n", nCount);	long lId;	CString str;	AcDbObjectId LineId;	AcDbEntity *pEnt = NULL;	AcDbLine *pLine = NULL;	Acad::ErrorStatus es;		if (nCount > 0)	{			for (int i = 0; i < nCount; ++i)			{				str = m_ListCtr.GetItemText(i, 0);				lId = atol(str);				LineId.setFromOldId(lId);				//获得指针				es = acdbOpenAcDbEntity(pEnt, LineId, AcDb::kForWrite);				//检查是否被删除				pLine = AcDbLine::cast(pEnt);				if (es == Acad::eWasErased)				{					m_ListCtr.DeleteItem(i);					--m_lLineCnt;					--i;					--m_Row;				} 				//检查颜色				else if (es == Acad::eOk)				{					if (pLine)					{						str = m_ListCtr.GetItemText(i, 1);						Adesk::UInt16 usColor = (Adesk::UInt16)atoi(str);						if (pLine->colorIndex() != usColor)						{							char *buf = (char*)malloc(20);							itoa((int)pLine->colorIndex(), buf, 10);							m_ListCtr.SetItemText(i, 1, buf);							free(buf);						}						pLine->close();					}				}									}	}		UpdateData(FALSE);	acDocManager->unlockDocument(curDoc());}

void TTunnel::setInTunnel( const AcDbObjectId& objId ){    assertWriteEnabled();    if( objId.isNull() ) return;    if( m_inTunnel == objId ) return;    m_inTunnel = objId;}

bool PropertyDataDlgHelper::DisplayPropertyDataDlg( const AcDbObjectId& objId ){    if( objId.isNull() ) return false;    AcDbObjectId dObjId;    if( !DataHelper::GetDataObject( objId, dObjId ) ) return false;    CString type;    if( !DataHelper::GetTypeName( objId, type ) ) return false;    AcStringArray fields;    FieldHelper::GetAllFields( type, fields );	//acutPrintf(_T("/n类型：%s"),type);    if( fields.isEmpty() )    {        CString msg;        //msg.Format(_T("类型:%s的字段个数为0，没有数据可以显示..."), type);        msg.Format( _T( "没有数据可以显示..." ) );        AfxMessageBox( msg );        return false;    }    else    {		DisplayPartialPropertyDataDlg( dObjId, fields );        return true;    }}

bool ReportDataHelper::SetObjectDatas( const AcDbObjectId& objId,const AcStringArray& values ){	if( objId.isNull() ) return false;	AcTransaction* pTrans = actrTransactionManager->startTransaction();	if( pTrans == 0 ) return false;	AcDbObject* pObj;	if( Acad::eOk != pTrans->getObject( pObj, objId, AcDb::kForWrite ) )	{		actrTransactionManager->abortTransaction();		return false;	}	DataObject* pDO = DataObject::cast( pObj );	if( pDO == 0 )	{		actrTransactionManager->abortTransaction();		return false;	}	pDO->clearAll();	for(int i = 0;  i < values.length(); i++)	{		CString value = values[i].kACharPtr();		pDO->addData();		pDO->setData(i,value);	}	actrTransactionManager->endTransaction();	return true;}

bool PropertyDataDlgHelper::DisplayPropertyByFunName( const AcDbObjectId& objId, const CString funName ){	if( objId.isNull() ) return false;	AcDbObjectId dObjId;	if( !DataHelper::GetDataObject( objId, dObjId ) ) return false;	CString type;	if( !DataHelper::GetTypeName( objId, type ) ) return false;	AcStringArray fields;	FuncFieldHelper::GetFields(funName,type,fields);	//for (int i = 0; i < fields.length(); i++)	//{	//	acutPrintf(_T("/n功能:%s/t字段:%s"),funName,fields[i]);	//}	//FieldHelper::GetAllFields( type, fields );	if( fields.isEmpty() )	{		CString msg;		//msg.Format(_T("类型:%s的字段个数为0，没有数据可以显示..."), type);		msg.Format( _T( "没有数据可以显示..." ) );		AfxMessageBox( msg );		return false;	}	InputPropertyDataDlg( dObjId, fields,funName );	return true;}

// 设置独立用风分支// 独立用风地点：采掘工作面、采区变电所static bool SetEdgeType( const AcDbObjectId& objId, EdgeData* pEdgeData ){    bool ret = true;    if( objId.isNull() )    {        pEdgeData->et = ET_VIRTUAL;    }    else if( ArxUtilHelper::IsEqualType( _T( "WorkSurface" ), objId ) )    {        pEdgeData->et = ET_USEAIR;  // 工作面    }    else if( ArxUtilHelper::IsEqualType( _T( "StorageGE" ), objId ) )    {        if( !ArxUtilHelper::IsEqualType( _T( "MachineRoom" ), objId ) )        {            pEdgeData->et = ET_USEAIR;  // 火药库或充电室        }        else if( IsPowerSubstation( objId ) )        {            pEdgeData->et = ET_USEAIR;  // 机电硐室--变电所(用风地点)        }    }    else if( ArxUtilHelper::IsEqualType( _T( "TTunnel" ), objId ) )    {        pEdgeData->et = ET_USEAIR;  // 掘进工作面    }    /*else if(IsNeedAir(objId))    {    	pEdgeData->et = ET_USEAIR;    }*/    return ret;}

static bool CheackTubeLenth(AcDbObjectId& objId){	objId = ArxUtilHelper::SelectObject( _T( "请选择一条瓦斯管路:" ) );	if( objId.isNull() ) return false;	if( !ArxUtilHelper::IsEqualType( _T( "GasTube" ), objId ) ) return false;	AcTransaction *pTrans = actrTransactionManager->startTransaction();	if ( 0 == pTrans ) return false;	AcDbObject *pObj;	if (Acad::eOk != pTrans->getObject(pObj,objId,AcDb::kForRead)) return false;	GasTube *pGasTube = GasTube::cast(pObj);	if ( 0 == pGasTube)	{		actrTransactionManager->abortTransaction();		return false;	}	AcGePoint3d spt,ept;	pGasTube->getSEPoint(spt,ept);	//double angle = pGasTube->getAngle();	actrTransactionManager->endTransaction();	AcGeVector3d v = ept - spt;	double tubeLenth = v.length();	return true;}

void CMyDlg::OnSelectLine(){	// TODO: Add your control notification handler code here	ads_name adsNameSet, adsName;	AcDbObjectId objId;	int ret = 0;	long lSelCnt = 0;	AcDbEntity *pEnt = NULL;	int nCount = m_ListCtr.GetItemCount();	long lId;	CString str;	AcDbObjectId LineId;	acDocManager->lockDocument(curDoc());	ShowWindow(SW_HIDE);	ret = acedSSGet(NULL, NULL, NULL, NULL, adsNameSet);		if (RTNORM == ret)	{		m_ListCtr.SetFocus();		acedSSLength(adsNameSet, &lSelCnt);		for (long i = 0; i < lSelCnt; ++i)		{			acedSSName(adsNameSet, i, adsName);			acdbGetObjectId(objId, adsName);			if (nCount > 0)			{				for (int i = 0; i < nCount; ++i)				{					str = m_ListCtr.GetItemText(i, 0);					lId = atol(str);					LineId.setFromOldId(lId);					if (LineId == objId)					{										m_ListCtr.SetItemState(i, LVIS_SELECTED, LVIS_SELECTED);					}				}			}					}		ShowWindow(SW_SHOW);	}	acedSSFree(adsName);//	acutRelRb(stResBuf);	acDocManager->unlockDocument(curDoc());}

void TagGE::setRelatedGE( const AcDbObjectId& objId ){    assertWriteEnabled();    if( objId.isNull() || ( objId == m_objId ) ) return;    if( objId == objectId() ) return;                            // 不能和图元自身关联    if( !ArxUtilHelper::IsEqualType( _T( "MineGE" ), objId ) ) return; // 必须从MineGE派生    m_objId = objId;}