Wheel-like Inventory UI Input

I’m currently trying to implement an inventory UI system in UMG similar to the Sniper Elite inventory, here’s a picture of it:


I’m having troubles figuring out how to do the input to select which item the player is pointing at with the Gamepad right stick.
Can anybody give me some clues about how to receive the input from the gamepad’s right stick and determine which item is pointing at (currently the menu items I have are done with a custom UserWidget that has a Button in it), any advices how to approach this?

Thanks in advance.