How to create logic for graphic settings based on comboboxes?

Hello. I want to create graphic settings menu based on comboboxes. But I don’t know how to do this. For now I created this:
Enum for settings:


Connect it to combobox (for example anti aliasing) with “On opening” event:

Set default option with that:

But I’ve got problem:
Event Construct is triggerd before “on opening” event, so setting default option is not working, the only solution I know is connect it to event construct but then I’ll got the giant monster-script for all graphic settings.
Maybe there is a good practice for settings menu or the way just to connect enums simply in editor?