If you change some dimension variables (for example DIMTXT) and if you want to apply the changes to a dimension entity, you first have to create a new temporary dimension style which contains the actual dimension variables. Then you can assign this temporary style to a dimension.
To build the temporary dimension style you have to use the function AcDbDatabase::getDimstyleData(). This function applies the current dimension variables to a dimension style. Then use AcDbDimension::setDimstyleData() to apply this style to a dimension.
The following codes shows how to get a dimension entity and to assign the current dimension settings to it:
//
// Get dimension entity
//
ads_name ename;
ads_point pt;
if (RTNORM != ads_entsel(_T("\nSelect dimension: "), ename, pt))
return;
AcDbObjectId objId;
AcDbEntity *pEnt;
acdbGetObjectId(objId, ename);
if (Acad::eOk != acdbOpenAcDbEntity(pEnt, objId, AcDb::kForRead)) {
ads_printf(_T("\nCannot open selected entity."));
return;
}
if (!pEnt->isKindOf(AcDbDimension::desc())) {
ads_printf(_T("\nSelected entity is not a dimension."));
pEnt->close();
return;
}
//
// Get current dimension var’s and apply them to the dimension entity
//
AcDbDimension *pDim = (AcDbDimension*) pEnt;
// Create the temporary dimension style
AcDbDimStyleTableRecord *pDimStyle = new AcDbDimStyleTableRecord;
// Apply the current dim var’s to the temp dim style
acdbCurDwg()->getDimstyleData(pDimStyle);
// Now assign this style to the selected dimension
pDim->upgradeOpen();
pDim->setDimstyleData(pDimStyle);
pDim->close();
// Don’t forget to delete the temporary dimension style
delete pDimStyle;
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