Secondary click if statement inside a CentralPanel

[AlbinSjoegren]

Hey, I am making a normal desktop env for my game and I use a CentralPanel for the background. I wanted to read if the player right-clicked somewhere inside the CentralPanel in order to show a pop-up menu. There is an Enum under egui::Response but I have as of yet found no way to use it.
I am fairly new to both rust and egui so the answer might be obvious but anyway here I am.
/Albin