<?xml encoding=”UTF-8″>By Balaji Ramamoorthy
Here is a sample code to identify the layers that have their properties overridden for a viewport and to list the property overrides. The “AcDbLayerTableRecord::hasAnyOverrides” should quickly let us know if there are any overrides for any of the viewports. If it does exist, we can get to the details using “AcDbLayerTableRecord::hasOverrides” and provide the ObjectId of the viewport for which we want to know the overrides.
Acad::ErrorStatus es; AcDbDatabase *pDb = acdbHostApplicationServices()->workingDatabase(); ads_point pt; ads_name ename; <span>if</span><span> ( RTNORM != </span> acedEntSel(ACRX_T(<span>"Select a viewport :"</span><span> ), </span> ename, pt)) <span>return</span><span> ;</span> AcDbObjectId vpid = AcDbObjectId::kNull; <span>if</span><span> ( Acad::eOk != acdbGetObjectId(vpid, ename ))</span> <span>return</span><span> ;</span> AcDbObjectId layerId = AcDbObjectId::kNull; AcDbLayerTable* pLayerTable; pDb->getSymbolTable(pLayerTable, AcDb::kForRead); AcDbLayerTableIterator *pIter = NULL; AcDbLayerTableRecord *pLTR = NULL; pLayerTable->newIterator(pIter); <span>for</span><span> (;! pIter->done(); pIter->step()) </span> <span>{</span> es = pIter->getRecord(pLTR, AcDb::kForRead); <span>if</span><span> (! pLTR->hasAnyOverrides())</span> <span>{</span> pLTR->close(); <span>continue</span><span> ;</span> <span>}</span> <span>if</span><span> (! pLTR->hasOverrides(vpid))</span> <span>{</span> pLTR->close(); <span>continue</span><span> ;</span> <span>}</span> TCHAR *lname; pLTR->getName(lname); acutPrintf(L<span>"\n Layer : %s has the following overrides :"</span><span> ,</span> lname); <span>bool</span><span> isOverriddenForVP = Adesk::kFalse;</span> AcCmColor clr = pLTR->color(vpid, isOverriddenForVP); <span>if</span><span> (isOverriddenForVP)</span> <span>{</span> acutPrintf(L<span>"\n Color override"</span><span> );</span> <span>}</span> isOverriddenForVP = Adesk::kFalse; AcDbObjectId ltypeId = pLTR->linetypeObjectId( vpid, isOverriddenForVP); <span>if</span><span> (isOverriddenForVP)</span> <span>{</span> acutPrintf(L<span>"\n Linetype override"</span><span> );</span> <span>}</span> isOverriddenForVP = Adesk::kFalse; AcDb::LineWeight lw = pLTR->lineWeight (vpid, isOverriddenForVP); <span>if</span><span> (isOverriddenForVP)</span> <span>{</span> acutPrintf(L<span>"\n Lineweight override"</span><span> );</span> <span>}</span> isOverriddenForVP = Adesk::kFalse; ACHAR *psName = pLTR->plotStyleName (vpid, isOverriddenForVP); <span>if</span><span> (isOverriddenForVP)</span> <span>{</span> acutPrintf(L<span>"\n Plotstyle override"</span><span> );</span> <span>}</span> pLTR->close(); <span>}</span> <span>delete</span><span> pIter;</span> pLayerTable->close(); 
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