Reply To: Custom Drawer Accessing Source Class

[Gavalakis]

Hello there,

Within an AttributeDrawer, you can access the source object with the ‘.context’ property. You can then use reflection to call a function by name or in this case get a field (AbilityList) by name. Here is an example of such a drawer:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

public class Example : FlowNode     {           [ListSource("AbilityList")]         public string AbilityName;           public List<string> AbilityList = new List<string> { "Magic Missile", "Teleport", "Fireball" };     }       ///----------------------------------------------------------------------------------------------       public class ListSourceAttribute : DrawerAttribute     {         public readonly string listName;         public ListSourceAttribute(string listName) {             this.listName = listName;         }     }       ///----------------------------------------------------------------------------------------------       public class ListSourceAttributeDrawer : AttributeDrawer<ListSourceAttribute>     {         public override object OnGUI(GUIContent content, object instance) {             //...             var list = (List<string>)this.context.GetType().GetField(attribute.listName).GetValue(context);             instance = (string)EditorUtils.StringPopup(content, (string)instance, list);             //...             return instance;         }     }

Let me know if that works for you.

Join us on Discord: https://discord.gg/97q2Rjh