Create a leader attached MText

By Virupaksha Aithal

When we create a leader with attached MText, the main API is attachAnnotation , this function will only work if both the AcDbLeader and the AcDbMText are database resident. So we first create a leader and post it to database, then open the leader object and invoke  attachAnnotation to attach the mtext. Below is an example that does this

void CreateLeaderAttachText(void)

{

    ads_point adspt1, adspt2, entpt;

 

    if(acedGetPoint(NULL,_T("\nSelect first point "),

                                            adspt1) != RTNORM)

        return;

 

    if(acedGetPoint(NULL,_T("\nSelect Second point "),

                                            adspt2) != RTNORM)

        return;

 

    AcGePoint3d point1, point2;

    point1.set(adspt1[0],adspt1[1],0.0);

    point2.set(adspt2[0],adspt2[1],0.0);

 

    AcDbDatabase *pDb =

      acdbHostApplicationServices()->workingDatabase();

 

    //get model psace id

    AcDbObjectId modelId;

    modelId = acdbSymUtil()->blockModelSpaceId(pDb);

 

    AcDbBlockTableRecord *pBlockTableRecord;

    acdbOpenAcDbObject((AcDbObject*&)pBlockTableRecord,

                                    modelId, AcDb::kForWrite);

 

    AcDbObjectId mtextId;

 

    AcDbMText *pMtext = new AcDbMText();

    pMtext->setDatabaseDefaults () ;

    pMtext->setContents(_T("TEXT STRING"));

    pMtext->setLocation (point2);

    pBlockTableRecord->appendAcDbEntity(mtextId, pMtext);

 

    pMtext->close();

    AcDbObjectId leaderId;

    AcDbLeader *pLeader = new AcDbLeader();

    pLeader->appendVertex(point1);

    pLeader->appendVertex(point2);

 

    pLeader->setDatabaseDefaults(pDb);

 

    pBlockTableRecord->appendAcDbEntity(leaderId, pLeader);

    pBlockTableRecord->close();

    pLeader->close();

 

    acdbOpenObject (pLeader, leaderId, AcDb::kForWrite) ;

 

    pLeader->attachAnnotation(mtextId);

    pLeader->evaluateLeader();

    pLeader->close();

}