classes/class_editorresourcepreviewgenerator

[giscus[bot]]

classes/class_editorresourcepreviewgenerator

Inherits: RefCounted< Object Custom generator of previews. Description: Custom code to generate previews. Please check file_dialog/thumbnail_size in EditorSettings to find out the right size to do ...

https://docs.godotengine.org/en/stable/classes/class_editorresourcepreviewgenerator.html

[DDoop]

Implementing _Handles seems to be impossible for custom resource types. When I check the string value it receives, it just reports the type I've inherited from, for example Resource or FastNoiseLite. These custom Resource types I'm using are all labeled as Tools & Global Classes.

So are EditorResourcePreviewGenerators only intended for use on built-in types? If so, that should probably be mentioned somewhere. I was hoping to just make modifications to how a FastNoiseLite is sampled, and I wrote a preview generator that makes sense to me, but it will never get used as far as I understand it now. Is an InspectorPlugin the only option?

[DDoop]

I did figure out how this works, based on some very helpful advice I solicited in the docs repo. I also created a sample project here that demonstrates how to use this in case anyone else has questions. The key is just to check the Resources' type inside _generate() where you get a real reference to the object, not _handles(), which implicitly calls get_class and only deals in built-in types.