How can I use TMap for Inventory?

Development Pipeline & Plugins Editor Scripting
, , , , ,
1

I was planning on implementing an abstract inventory class using a TMap to store items with their associated locations within the inventory, and expose them as readonly properties to blueprints. However, after adding the following UPROPERTY tag, it seems that I can’t use TMaps as properties:

UPROPERTY(VisibleAnywhere, BlueprintReadOnly, etc...)

The type would be something like this:

TMap<location_type, item_type> Items;

Is there any way to use a hashmap like this and expose it to a blueprint? I know I can implement it using a TArray, but not without creating a separate structure that stores an item’s locations within the inventory. And using a TArray seems kind of like a roundabout way of doing this.

Thanks for any tips!

2

You can’t expose TMap directly to blueprints as UPROPERTY. The same goes for TSet.

To work around it, you can create UFUNCTIONS for indirect use of your property in bluepeinrs.

3

Thanks, I’m currently implementing it using a TArray of a custom type that contains the location within the inventory instead. I guess I’ll have to do it that way. Thanks again!