[求助]：几个问题，请各位指点一下方向！

yoursmile

１。请问怎么用AcGsView来做预览对话框，我研究过SDK里面的例子BlockView，但感觉找不到正确的实现方式。我的目标是实现像AcadViewer里面那样的预览功能。
２。请问怎么控制实体的“超链接”这个属性。
３。请问OPM与Arx的关系是怎么的！？
谢谢指点！

RedCAD

这几个问题感觉目前帮不上大忙，但还是把它顶上去。

missyou0515

第二个问题的解答：
The following function lists the hyperlinks associated with an entity and allows new hyperlinks to be added in their place. (Error checking is not shown.)

1. 
   
2.   [FONT=courier new]
   
3. void AddHyperlink()
   
4. {
   
5.     ads_name en;
   
6.     ads_point pt;
   
7.     AcDbEntity * pEnt;
   
8.     AcDbObjectId pEntId;
   
9. 
   
10.     // Prompt user to select entity.   
    
11.     acedEntSel("\nSelect an Entity:  ", en, pt);
    
12. 
    
13.     // Get Object id.
    
14.     acdbGetObjectId(pEntId, en);
    
15. 
    
16.     // Open object for write.
    
17.     acdbOpenObject(pEnt, pEntId, AcDb::kForWrite);
    
18. 
    
19.     // The hyperlink collection object is created inside
    
20.     // of getHyperlinkCollection
    
21.     // below. It is our responsibility to delete it.
    
22.     AcDbHyperlinkCollection * pcHCL = NULL;
    
23.    
    
24.     // Get the hyperlink collection associated with the entity.
    
25.     ACRX_X_CALL(pEnt, AcDbEntityHyperlinkPE)->
    
26.         getHyperlinkCollection(pEnt, pcHCL, false, true);
    
27.    
    
28.     // If a hyperlink exists already, say so.
    
29.     if (pcHCL->count() != 0)
    
30.     {
    
31.         AcDbHyperlink * pcHO;
    
32. 
    
33.         acutPrintf("\nThe following hyperlink info already exists
    
34.             on this entity:");
    
35. 
    
36.         // Iterate through collection and print existing hyperlinks.
    
37.         int i = 0;
    
38.         for (i = 0; i < pcHCL->count(); i++)
    
39.         {
    
40.             // Get point to current hyperlink object.
    
41.             pcHO = pcHCL->item(i);
    
42. 
    
43.             acutPrintf("\nHyperlink name: %s", pcHO->name());
    
44.             acutPrintf("\nHyperlink location: %s",
    
45.                 pcHO->subLocation());
    
46.             acutPrintf("\nHyperlink description: %s",
    
47.                 pcHO->description());
    
48.         }
    
49.         acutPrintf("\n** All will be replaced.**");
    
50.         
    
51.         // Remove existing hyperlinks from collection.
    
52.         // RemoveAt will delete objects too.
    
53.         for (i = pcHCL->count() - 1; i >= 0; i--)
    
54.         {
    
55.             pcHCL->removeAt(i);
    
56.         }
    
57.     }
    
58. 
    
59.     // Get new hyperlinks for this entity.
    
60.     for (;;)
    
61.     {
    
62.         acutPrintf("\nEnter null name, location, and description to
    
63.             terminate input requests.");
    
64.         
    
65.         // Prompt user for name and description.
    
66.         char sName[100], sLocation[100], sDescription[100];
    
67.         if (acedGetString(TRUE, "\nEnter hyperlink name: ", sName)
    
68.             != RTNORM)
    
69.             acutPrintf("Invalid input\n");
    
70.         if (acedGetString(TRUE, "\nEnter hyperlink location: ",
    
71.             sLocation) != RTNORM)
    
72.             acutPrintf("Invalid input\n");
    
73.         if (acedGetString(TRUE, "\nEnter hyperlink description: ",
    
74.             sDescription) != RTNORM)
    
75.             acutPrintf("Invalid input\n");
    
76.    
    
77.         // Add hyperlink or exit prompting.
    
78.         if (strcmp(sName, "") || strcmp(sLocation, "") ||
    
79.            strcmp(sDescription, ""))
    
80.            pcHCL->addTail(sName, sDescription, sLocation);
    
81.         else
    
82.            break;  
    
83.     }
    
84.    
    
85.     // Add these hyperlinks to the selected entity (opened above).
    
86.     ACRX_X_CALL(pEnt, AcDbEntityHyperlinkPE)->
    
87.         setHyperlinkCollection(pEnt, pcHCL);
    
88. 
    
89.     // Delete the collection. The collection will delete all its
    
90.     // contained hyperlink objects.
    
91.     delete pcHCL;
    
92. 
    
93.     // Close the object.
    
94.     pEnt->close();
    
95. }
    
96. 
    
97.   [/FONT]
    

复制代码

yoursmile

谢谢两位大侠的关心指导！代码我先研究了！谢谢！