Question ValueInput with a struct and a custom inspector

Hello.

I am trying to make a ValueInput use a struct and show a custom inspector -- pretty much just like how a Vector3 is displayed:




In ValueInput, there is a SupportsDefaultValue method that seems to control if an inspector will show. It matches against a set of types:

Code (CSharp):

1.  
2.         private static readonly HashSet<Type> typesWithDefaultValues = new HashSet<Type>()
3.         {
4.             typeof(Vector2),
5.             typeof(Vector3),
6.             typeof(Vector4),
7.             typeof(Color),
8.             typeof(AnimationCurve),
9.             typeof(Rect),
10.             typeof(Ray),
11.             typeof(Ray2D),
12.             typeof(Type),
13. #if PACKAGE_INPUT_SYSTEM_EXISTS
14.             typeof(UnityEngine.InputSystem.InputAction),
15. #endif
16.         };
17.  
18.         public static bool SupportsDefaultValue(Type type)
19.         {
20.             return
21.                 typesWithDefaultValues.Contains(type) ||
22.                 typesWithDefaultValues.Contains(Nullable.GetUnderlyingType(type)) ||
23.                 type.IsBasic() ||
24.                 typeof(UnityObject).IsAssignableFrom(type);
25.         }
26.  

If I use a struct, then the inspector will not show:

Code (CSharp):

1.  
2.     public struct LampIdValue
3.     {
4.         public string id;
5.         public int value;
6.  
7.         public static readonly LampIdValue Empty = new LampIdValue { id = string.Empty, value = 0 };
8.     }
9. .
10. .
11. .
12. var lampIdValue = ValueInput<LampIdValue>("Lamp ID " + (i + 1), LampIdValue.Empty);
13.  

So, the only way I can get the inspector to show is to make the ValueInput use a UnityObject:

Code (CSharp):

1.  
2.     [Serializable]
3.     public class LampIdValue : UnityObject
4.     {
5.         public string id;
6.         public int value;
7.  
8.         public static readonly LampIdValue Empty = new LampIdValue { id = string.Empty, value = 0 };
9.     }
10. .
11. .
12. .
13. var lampIdValue = ValueInput<LampIdValue>("Lamp ID " + (i + 1), LampIdValue.Empty);
14.  

Now the problem is, whenever I restart Unity, (or make a code change), the data is lost:




Does anyone know why the data is not being preserved?

 

I'm poorly versed in the land of custom nodes, but did you try decorating your struct with [Serializable] attribute? I recall that being a requirement for structs to display correctly within UnityVS Variables inspector. Might also help here.

 

@PanthenEye - thanks, but we tried that. Unfortunately, the inspector wont show because of how they lock it down to just a few types (Vector2, Vector3, Vector4, Color, AnimationCurve, Rect, Ray, Ray2D, primitives, etc).