OBJECT ARX 遍历数据库所有图元代码

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1. typedef void (*DoSomethingWithEnt)( AcDbEntity*);
3. void WalkThrough(AcDbDatabase* db, DoSomethingWithEnt callBack)
4. {
5. AcDbBlockTable *pBlockTable;
6. db->getSymbolTable(pBlockTable, AcDb::kForRead);
7. AcDbBlockTableIterator* pBlockIt;
8. Acad::ErrorStatus es = pBlockTable->newIterator(pBlockIt);
9. if(Acad::eOk != es)
10. {
11. pBlockTable->close();
12. return;
13. }
14. AcDbBlockTableRecord *pBlockTableRecord;
15. for(pBlockIt->start();!pBlockIt->done();pBlockIt->step())
16. {
17. es = pBlockIt->getRecord(pBlockTableRecord, AcDb::kForRead);
18. if(Acad::eOk == es)
19. {
20. AcDbBlockTableRecordIterator* pEntIt;
21. es = pBlockTableRecord->newIterator(pEntIt);
22. if(Acad::eOk == es)
23. {
24. for (pEntIt->start();!pEntIt->done();pEntIt->step())
25. {
26. AcDbEntity* pEnt;
27. es = pEntIt->getEntity(pEnt, AcDb::kForWrite);
28. if (Acad::eOk == es)
29. {
30. callBack(pEnt);
31. pEnt->close();
32. }
33. }
34. delete pEntIt;
35. }
36. pBlockTableRecord->close();
37. }
38. }
39. delete pBlockIt;
40. pBlockTable->close();
41. }

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