Topic: zoom to object in xref

[Jeff H]

How would you go about selecting an entity and then open the xref and zoom to it?

Here is minimal code that seems to work for minimal testing I have done.
The code

• Prompts for nested entity
• Checks to see if selected entity is from different database
• Iterates the containers from PromptNestedResult and stores handle of the last one which is in same database
• Opens xref and sendstring with Editor.Command to zoom to object

Code - C#: [Select]

1. public class TestClass4 : CommandClass
2.     {
3.  
4.         private static Handle? hnd = null;
5.         [CommandMethod("zoomxref")]
6.         public void zoomxref()
7.         {
8.             hnd = null;
9.             var pneo = new PromptNestedEntityOptions("\nSelect xref object");
10.             var pner = Ed.GetNestedEntity(pneo);
11.             if (pner.Status != PromptStatus.OK)
12.             {
13.                 return;
14.             }
15.  
16.             var id = pner.ObjectId;
17.             if (id.Database.UnmanagedObject == Db.UnmanagedObject)
18.             {
19.                 Ed.WriteLine("Select xref object");
20.                 return;
21.             }
22.  
23.             foreach (ObjectId conId in pner.GetContainers())
24.             {
25.                 if (conId.Database.UnmanagedObject == pner.ObjectId.Database.UnmanagedObject)
26.                 {
27.                     id = conId;
28.                 }
29.  
30.             }
31.  
32.             using (Transaction trx = Doc.TransactionManager.StartTransaction())
33.             {
34.                 var ent = id.GetEntity();
35.                 hnd = ent.Handle;
36.                 trx.Commit();
37.             }
38.  
39.             var doc = Application.DocumentManager.Open(pner.ObjectId.Database.Filename, false);
40.             doc.SendStringToExecute("zoomxrefobject ", true, false, false);
41.  
42.         }
43.  
44.  
45.         [CommandMethod("zoomxrefobject", CommandFlags.NoHistory)]
46.         public void zoomxrefobject()
47.         {
48.             if (!hnd.HasValue) return;
49.             var id = Db.GetObjectId(false, (Handle)hnd, 0);
50.             var ss = SelectionSet.FromObjectIds(new ObjectId[] { id });
51.             Ed.Command("_Zoom", "_Object", ss, "");
52.         }
53.      
54.     }
55.  
56.  

[BillZndl]

The following code is what I use to zoom up to the entities comprising an AutoCAD "Group".
I must've gotten some help on how to do this, most likely from this board,
so I don't have an explanation on how it all works.
Just thought it might help...

Code - C#: [Select]

1. private static void ZoomToPart(ObjectId[] Eids, Transaction trans, Document doc)
2.         {                    
3.                 Extents3d exts =
4.                     Eids.Select(id => ((Entity)trans.GetObject(id, OpenMode.ForRead)).GeometricExtents).Aggregate(
5.                     (e1, e2) => { e1.AddExtents(e2); return e1; });        
6.                                                
7.                 int CvId = Convert.ToInt32((Application.GetSystemVariable("CVPORT")));
8.                        
9.                 using (Manager gm = doc.GraphicsManager)
10.                 using (View vw = gm.GetGsView(CvId, true))
11.                 {
12.                     vw.ZoomExtents(exts.MinPoint, exts.MaxPoint);                    
13.                     gm.SetViewportFromView(CvId, vw, true, true, false);
14.                 }  
15.         }

[Jeff H]

GetGsView was removed in 2015 I think.

[Keith Brown]

I use a zoom method that takes an entity extents and a zoom factor to controls the amount of "zoomification" around the entity.  You have the entity id so getting its extents is not a big deal.

[BillZndl]

amount of "zoomification".

Hmmm,
must be a technical term.