外部DWG创建 AcDbXRefGraph

newer

问题：

In ObjectARX there only seems to be one function to create an AcDbXRefGraph
of a drawing, this function is called acedGetCurDwgXRefGraph.

The problem is that this only works on the current drawing!! How can I create
an AcDbXRefGraph of an external drawing (AcDbDatabase) that I have read in?


解答：

Here is a function to do the trick.

1. 
   
2. // ObjectARX defined commands
   
3. 
   
4. 
   
5. #include "StdAfx.h"
   
6. #include "StdArx.h"
   
7. 
   
8. 
   
9. // function to fill in an AcDbXrefGraph with a completed graph of the current drawing's xrefs.
   
10. // Returns Acad::eOk if successful.
    
11. Acad::ErrorStatus GetXrefGraph (AcDbDatabase *dwgDb, AcDbXrefGraph& graph);
    
12. 
    
13. 
    
14. // This is command 'TEST'
    
15. void asdktest()
    
16. {
    
17. // lock the document
    
18. AcAxDocLock docLock;
    
19. // now read in an external drawing
    
20. AcDbDatabase *db = new AcDbDatabase (false);
    
21. // if we created the db ok
    
22. if (db != NULL)
    
23. {
    
24.   Acad::ErrorStatus es;
    
25.   // try and read in the drawing
    
26.   es = db->readDwgFile ("c:\\temp\\114-AB1B2.dwg");
    
27.   // if ok
    
28.   if (es == Acad::eOk)
    
29.   {
    
30.    AcDbXrefGraph graph;
    
31.    // try out our new function
    
32.    GetXrefGraph (db, graph);
    
33.    // a little test to see if it worked
    
34.    acutPrintf ("\nNumber of nodes = %d", graph.numNodes ());
    
35.   }
    
36.   delete db;
    
37. }
    
38. }
    

<br /> // ObjectARX defined commands<br /> <br /> <br /> #include "StdAfx.h"<br /> #include "StdArx.h"<br /> <br /> <br /> // function to fill in an AcDbXrefGraph with a completed graph of the current drawing's xrefs.<br /> // Returns Acad::eOk if successful.<br /> Acad::ErrorStatus GetXrefGraph (AcDbDatabase *dwgDb, AcDbXrefGraph& graph);<br /> <br /> <br /> // This is command 'TEST'<br /> void asdktest()<br /> {<br /> // lock the document<br /> AcAxDocLock docLock;<br /> // now read in an external drawing<br /> AcDbDatabase *db = new AcDbDatabase (false);<br /> // if we created the db ok<br /> if (db != NULL)<br /> {<br />   Acad::ErrorStatus es;<br />   // try and read in the drawing<br />   es = db->readDwgFile ("c:\\temp\\114-AB1B2.dwg");<br />   // if ok<br />   if (es == Acad::eOk)<br />   {<br />    AcDbXrefGraph graph;<br />    // try out our new function<br />    GetXrefGraph (db, graph);<br />    // a little test to see if it worked<br />    acutPrintf ("\nNumber of nodes = %d", graph.numNodes ());<br />   } <br />   delete db;<br /> }<br /> }<br />