如何通过程序创建一个多线样式（AcDbMlineStyle）

LoveArx

见下面代码：

1. 
   
2. // minimal error checking for code brevity
   
3. void createMlineStyle()
   
4. {
   
5.     AcDbLinetypeTable* pTable = NULL;  
   
6. AcDbObjectId id;   
   
7. AcDbDatabase* pDb = curDoc()->database();
   
8. // open ByLayer linetypetablerecord for use in MLineStyle later
   
9. pDb->getLinetypeTable(pTable, AcDb::kForRead);
   
10. if((pTable->getAt(L"ByLayer", id)) != Acad::eOk)
    
11. {
    
12.     acutPrintf(L"\nlinetype ByLayer not found.");   
    
13.     return;   
    
14. }
    
15. pTable->close();
    
16. 
    
17.     AcDbDictionary* pDict = NULL;
    
18. // open MLStyleDictionary (its sored in the NOD)  
    
19. Acad::ErrorStatus es = pDb->getMLStyleDictionary(pDict, AcDb::kForRead);
    
20. if(es != Acad::eOk)   
    
21. {     
    
22.   acutPrintf(L"\nCan't open mline style dictionary for read.");  
    
23.   return;   
    
24. }  
    
25. const ACHAR mlineStyleName[] = L"test";
    
26. AcDbMlineStyle* ps = NULL;
    
27. // does MLStyle "test" already exist?
    
28. es = pDict->getAt(mlineStyleName, (AcDbObject*&)ps, AcDb::kForWrite);
    
29. // If it doesn't exist, create it  
    
30. if(es != Acad::eOk)  
    
31. {      
    
32.   ps = new AcDbMlineStyle;      
    
33.   AcDbObjectId mId;  
    
34.   ps->initMlineStyle();  
    
35.   pDict->upgradeOpen();   
    
36.   pDict->setAt(mlineStyleName, ps, mId);
    
37. }   
    
38. pDict->close();
    
39.     // set MLStyle attributes and elements   
    
40. es = ps->setName(mlineStyleName);
    
41. AcCmColor cm;     cm.setColorIndex(256);
    
42.     int a=0, b=0;   
    
43. es = ps->addElement(a, -0.25, cm, id);  
    
44. assert(es == Acad::eOk);  
    
45. es = ps->addElement(b, 0.25, cm, id);
    
46.     assert(es == Acad::eOk);  
    
47. ps->close();
    
48. acutPrintf(L"\nMline style: %s created.", mlineStyleName);
    
49. }
    

<br /> // minimal error checking for code brevity<br /> void createMlineStyle()<br /> {<br />     AcDbLinetypeTable* pTable = NULL;  <br /> AcDbObjectId id;   <br /> AcDbDatabase* pDb = curDoc()->database(); <br /> // open ByLayer linetypetablerecord for use in MLineStyle later <br /> pDb->getLinetypeTable(pTable, AcDb::kForRead); <br /> if((pTable->getAt(L"ByLayer", id)) != Acad::eOk)<br /> { <br />     acutPrintf(L"\nlinetype ByLayer not found.");    <br />     return;   <br /> }<br /> pTable->close();<br /> <br />     AcDbDictionary* pDict = NULL; <br /> // open MLStyleDictionary (its sored in the NOD)  <br /> Acad::ErrorStatus es = pDb->getMLStyleDictionary(pDict, AcDb::kForRead); <br /> if(es != Acad::eOk)   <br /> {     <br />   acutPrintf(L"\nCan't open mline style dictionary for read.");  <br />   return;   <br /> }  <br /> const ACHAR mlineStyleName[] = L"test"; <br /> AcDbMlineStyle* ps = NULL; <br /> // does MLStyle "test" already exist?<br /> es = pDict->getAt(mlineStyleName, (AcDbObject*&)ps, AcDb::kForWrite); <br /> // If it doesn't exist, create it  <br /> if(es != Acad::eOk)  <br /> {      <br />   ps = new AcDbMlineStyle;       <br />   AcDbObjectId mId;  <br />   ps->initMlineStyle();  <br />   pDict->upgradeOpen();   <br />   pDict->setAt(mlineStyleName, ps, mId); <br /> }   <br /> pDict->close();<br />     // set MLStyle attributes and elements   <br /> es = ps->setName(mlineStyleName); <br /> AcCmColor cm;     cm.setColorIndex(256);<br />     int a=0, b=0;    <br /> es = ps->addElement(a, -0.25, cm, id);  <br /> assert(es == Acad::eOk);  <br /> es = ps->addElement(b, 0.25, cm, id); <br />     assert(es == Acad::eOk);  <br /> ps->close(); <br /> acutPrintf(L"\nMline style: %s created.", mlineStyleName);<br /> }<br />