Unity Property Drawer. How to make custom property output for each element in a list?

Question

Unity

Hello everyone, here is such a structure:

[System.Serializable]
    public struct LocalizationResource
    {
        public string name;
        
        public string resourceName;
        public string filename;
        public string webResourceUrl;

        public LocalizationProviderType type;
    }

And here is such an Enum:

[System.Serializable]
    public enum LocalizationProviderType
    {
        UnityResourcesSystem = 0,
        FileSystem = 1,
        WebResourcesSystem = 2
    }

There is also a class in which a list of structures is declared, in which there is a list of LocalizationResource structures, this is how it looks:


You need to somehow contrive and make sure that the fields of the LocalizationResource structure are displayed depending on the value of the type field. Something like this:




Each enam value displays its own structure field, as far as I know this is done somehow through the PropertyDrawer, but I can’t figure it out myself. Maybe someone can help with this issue?

Answer 1

This task can be solved with the help of field attributes.
Here, for example, this .
This is how to use it.

[SerializeField] LocalizationProviderType type;

[ConditionalField("NextState", LocalizationProviderType.WebResourcesSystem )] 
[SerializeField] private string webResourceUrl;

PS IMHO, the approach for each sneeze to have its own field is not entirely correct. In fact, this is a path field, and not some data specific to each type of data. How this data is used further is the responsibility of other components.