Aligning of Mtext entities one above the other

By Gopinath Taget

The following code asks the user to select two MText entities and a new alignment point, and then modifies both to be aligned as you describe. The functions you need to be aware of are:

Acad::ErrorStatus AcDbMText::setLocation(const AcGePoint3d& loc);

Acad::ErrorStatus AcDbMText::setAttachment(AttachmentPoint type);

Here is the code:

int alignmtexts()
{
    // TODO: Implement the command
    resbuf *pArg = acedGetArgs();
    ads_name ent1, ent2;
    ads_point pt;

    if (RTNORM != acedEntSel(L"\nSelect first MText entity: ", ent1, pt))
    {
        return RTNORM;
    }

    if (RTNORM != acedEntSel(L"\nSelect second MText entity: ", ent2, pt))
    {
        return RTNORM;
    }

    AcGePoint3d newPt;
    if (RTNORM != acedGetPoint(NULL, _T("\nSelect new alignment point:"), asDblArray(newPt)))
    {
        return RTNORM;
    }

    AcDbObjectId objId1, objId2;
    if (Acad::eOk != acdbGetObjectId(objId1, ent1))
    {
        acutPrintf(L"\nCannot get object ID for first entity!");
        return RTNORM;
    }

    if (Acad::eOk != acdbGetObjectId(objId2, ent2))
    {
        acutPrintf(L"\nCannot get object ID for second entity!");
        // The original code has 'pObj1->close();' here, which is likely a bug
        // as pObj1 is not yet opened. Preserving original logic for cleaning.
        return RTNORM;
    }

    AcDbObject *pObj1 = NULL, *pObj2 = NULL;
    if (Acad::eOk != acdbOpenAcDbObject(pObj1, objId1, AcDb::kForRead))
    {
        acutPrintf(L"\nCannot open first entity!");
        return RTNORM;
    }

    if (Acad::eOk != acdbOpenAcDbObject(pObj2, objId2, AcDb::kForRead))
    {
        acutPrintf(L"\nCannot open second entity!");
        pObj1->close();
        return RTNORM;
    }

    AcDbMText *pMText1 = NULL, *pMText2 = NULL;
    if (NULL == (pMText1 = AcDbMText::cast(pObj1)))
    {
        acutPrintf(L"\nFirst entity is not an MText object!");
        pObj1->close();
        pObj2->close();
        return RTNORM;
    }

    if (NULL == (pMText2 = AcDbMText::cast(pObj2)))
    {
        acutPrintf(L"\nSecond entity is not an MText object!");
        pMText1->close();
        pObj2->close();
        return RTNORM;
    }

    if (Acad::eOk != pMText1->upgradeOpen())
    {
        acutPrintf(L"\nCannot upgrade open status of first entity!");
        pMText1->close();
        pMText2->close();
        return RTNORM;
    }

    if (Acad::eOk != pMText1->setLocation(newPt))
    {
        acutPrintf(L"\nCannot change location of first entity!");
        pMText1->close();
        pMText2->close();
        return RTNORM;
    }

    if (Acad::eOk != pMText1->setAttachment(AcDbMText::kBottomLeft))
    {
        acutPrintf(L"\nCannot change attachment point of first entity!");
        pMText1->close();
        pMText2->close();
        return RTNORM;
    }
    pMText1->close();

    if (Acad::eOk != pMText2->upgradeOpen())
    {
        acutPrintf(L"\nCannot upgrade open status of second entity!");
        pMText2->close();
        return RTNORM;
    }

    if (Acad::eOk != pMText2->setLocation(newPt))
    {
        acutPrintf(L"\nCannot change location of first entity!");
        pMText2->close();
        return RTNORM;
    }

    if (Acad::eOk != pMText2->setAttachment(AcDbMText::kTopLeft))
    {
        acutPrintf(L"\nCannot change attachment point of first entity!");
        pMText2->close();
        return RTNORM;
    }
    pMText2->close();

    return RTNORM;
}