Stop input events, use custom ones, then restore the original?

Hello awesome Banglers!
I have a couple of projects on the go, Hiding the widget bar in an overlay, and Pop up notifications in an overlay, both using Bangle.SetLCDOverlay. I'm having trouble with swipes and drags. I can set a new event handler to move the overlay, but the clock face or app underneath also reacts to the swipe or drag.

Is there a way to block or clear existing events, e.g. Bangle.on('swipe'...), use my custom swipe handler, then clear my custom handler and put the previous one back?