<?xml encoding=”UTF-8″>By Balaji Ramamoorthy
As you may already know, linetype definition in AutoCAD consists of series of values representing the pattern and can include text and shapes. Here is a sample code to iterate the linetypes loaded in the database and display the definition. In case of embedded shapes, a preview of the shape is created by adding an AcDbShape to the modelspace.
Acad::ErrorStatus es; <span>double</span><span> previewOffset = 5.0;</span> AcGePoint3d pos = AcGePoint3d::kOrigin; AcApDocument *pActiveDoc = acDocManager->mdiActiveDocument(); AcDbDatabase *pDB = pActiveDoc->database(); AcDbLinetypeTable* pLineTypeTable = NULL; <span>if</span><span> ( pDB->getLinetypeTable(</span> pLineTypeTable, AcDb::kForRead) != Acad::eOk) <span>return</span><span> ;</span> es = acDocManager->lockDocument(pActiveDoc); AcDbBlockTableRecordPointer pMS(ACDB_MODEL_SPACE, pDB, AcDb::kForWrite); AcDbLinetypeTableIterator* pIter = NULL; es = pLineTypeTable->newIterator( pIter); es = pLineTypeTable->close(); <span>for</span><span> (;! pIter->done(); pIter->step()) </span> <span>{</span> AcDbLinetypeTableRecord* pLinetype = NULL; <span>if</span><span> ( pIter->getRecord( pLinetype, </span> AcDb::kForRead) == Acad::eOk) <span>{</span> <span>const</span><span> ACHAR *pLinetypeName = NULL; </span> es = pLinetype->getName(pLinetypeName); acutPrintf(_T(<span>"\nLinetype : %s"</span><span> ), </span> pLinetypeName); <span>for</span><span> ( <span>int</span><span> dash = 0; dash < </span></span> pLinetype->numDashes(); ++dash) <span>{</span> <span>int</span><span> shapeNumber </span> = pLinetype->shapeNumberAt(dash); <span>double</span><span> dashLen </span> = pLinetype->dashLengthAt(dash); AcDbObjectId objIdShape (pLinetype->shapeStyleAt( dash)); <span>if</span><span> ( objIdShape == AcDbObjectId::kNull) </span> <span>{</span> <span>const</span><span> ACHAR *pText = NULL; </span> es = pLinetype->textAt(dash, pText); <span>if</span><span> (pText == NULL)</span> acutPrintf(_T(<span>"\nDash : %d DashLen : %lf"</span><span> ),</span> dash, dashLen); <span>else</span> acutPrintf(_T(<span>"\nDash : %d Text : %s"</span><span> ), </span> dash, pText); <span>continue</span><span> ;</span> <span>}</span> <span>// Shape involved, lets preview it...</span> AcDbObject* pObject = NULL; es = acdbOpenAcDbObject( pObject, objIdShape, AcDb::kForRead); AcDbTextStyleTableRecord* pTextSyleTableRec = AcDbTextStyleTableRecord::cast( pObject); Adesk::Boolean isShapeFile = pTextSyleTableRec->isShapeFile(); <span>if</span><span> (isShapeFile)</span> <span>{</span> <span>// Create a preview of the shape</span> AcDbShape *pShape = <span>new</span><span> AcDbShape</span> (AcGePoint3d::kOrigin, 1.0); <span>if</span><span> ( pShape->setShapeNumber(shapeNumber) </span> != Acad::eOk || pShape->setStyleId(objIdShape) != Acad::eOk) <span>{</span> <span>delete</span><span> pShape;</span> pShape = NULL; <span>}</span> <span>if</span><span> (pShape)</span> <span>{</span> es = pShape->setWidthFactor(1.0); AcDbObjectId id; es = pMS->appendAcDbEntity(id, pShape); es = pShape->setPosition(pos); pos += AcGeVector3d::kXAxis * previewOffset; es = pShape->setSize(1); es = pShape->setRotation(0); es=pShape->close(); <span>const</span><span> ACHAR *pShapeFileName = NULL; </span> Acad::ErrorStatus es = pTextSyleTableRec->fileName (pShapeFileName); acutPrintf(_T(<span>"\nDash : %d </span> ShapeNumber : %d ShapeName : %s ShapeFile : %s<span>"), </span> dash, shapeNumber, pShape->name(), pShapeFileName); <span>}</span> <span>}</span> <span>else</span> <span>{</span> <span>const</span><span> ACHAR *pText = NULL; </span> es = pLinetype->textAt(dash, pText); acutPrintf(_T(<span>"\nDash : %d Text : %s"</span><span> ), </span> dash, pText); <span>}</span> pObject->close(); <span>}</span> pLinetype->close(); <span>}</span> <span>}</span> <span>delete</span><span> pIter;</span> es = acDocManager->unlockDocument(pActiveDoc); The output generated by this code snippet is as seen in this screenshot :
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