Topic: Get more information from entities that implement DrawableOverrule

[ken2023]

I have rewritten the appearance of Hatch by adding some text at the centroid position of the bounding rectangle.

I know I can write the text content to XData or XRecord, but I'm a bit curious if I can directly read the text inside Hatch?

Code - C#: [Select]

1. namespace Test
2. {
3.     public class HatchDrawRule : DrawableOverrule
4.     {
5.         public override bool WorldDraw(Drawable drawable, WorldDraw wd)
6.         {
7.             if (drawable.Bounds == null) return false;
8.             Extents3d b = (Extents3d)drawable.Bounds;
9.             if (b.MinPoint.Z != 0) return false;
10.  
11.             var style = new TextStyle();
12.             style.TextSize = (b.MaxPoint.Y - b.MinPoint.Y) / 4;
13.  
14.             var center = new Point3d((double)(b.MinPoint.X + b.MaxPoint.X) / 2, (double)(b.MinPoint.Y + b.MaxPoint.Y) / 2, 0);
15.             wd.Geometry.Text(center, Vector3d.ZAxis, Vector3d.XAxis, "Hatch", true, style);
16.  
17.             return base.WorldDraw(drawable, wd);
18.         }
19.     }
20.  
21.     public class CustomHatchClass
22.     {
23.         private static HatchDrawRule _hatchDrawRule;
24.         [CommandMethod("AllowCustomHatch")]
25.         public void AllowCustomHatch()
26.         {
27.             if (_hatchDrawRule == null)
28.             {
29.                 _hatchDrawRule = new HatchDrawRule();
30.                 Overrule.AddOverrule(RXObject.GetClass(typeof(Hatch)), _hatchDrawRule, false);
31.             }
32.             Overrule.Overruling = true;
33.             Acap.DocumentManager.MdiActiveDocument.Editor.Regen();
34.         }
35.  
36.         [CommandMethod("GetData")]
37.         public void GetData()
38.         {
39.             var doc = Acap.DocumentManager.MdiActiveDocument;
40.             var pr = doc.Editor.GetSelection();
41.             if (pr.Status == ZwSoft.ZwCAD.EditorInput.PromptStatus.OK)
42.             {
43.                 foreach (ObjectId id in pr.Value.GetObjectIds())
44.                 {
45.                     using (var tran = doc.Database.TransactionManager.StartTransaction())
46.                     {
47.                         var ent = tran.GetObject(id, OpenMode.ForRead) as Entity;
48.                         if (ent is Hatch hatch)
49.                         {
50.                             //Can I read the text within Hatch directly?
51.                         }
52.                     }
53.                 }
54.             }
55.         }
56.     }
57. }

Besides, is there a good method to help me calculate the position of the text?
For example, I would like to adjust the position of the "Hatch" in the following image.
Although I gained the center point of Hatch approximately, the text did not truly center.

edit Kerry: add code tags [code=csharp]
https://www.theswamp.org/index.php?topic=48309.0

[n.yuan]

I do not think you can have access the text presented by the DrawableOverrule, because it is a visual presentation dynamically generated at the time when the Overruled hatch needs to be drawn/redrawn, it could be any shape and it happens to a look like a text.

So, you can save the Text with XData/ExtensionDictionary to the overruled Hatch, of course. Or, maybe, for it to be a bit  simpler, you can expose a Dictionary<ObjectId, string> from the Overrule class as static property, and save the text value used for visual presentation in the dictionary for later easy access?