Navigate a Uniform Grid Panel with controller ( UE4-27)

I have a uniform Grid Panel Widget that gets focus with the controller. It is filled at runtime, so I can’t set the navigation explicitly. How can I get it to use controller navigation to navigate within the panel (focusing on each item)?
I’ve tried:

  • “OnKeyPress” doesn’t recognize dpad input.
  • There is no event that I can find for navigation input (when a navigation direction is chosen)
  • I tried accessing the input events from the character blueprint, but it loses input when you set the input to UI only.