Feature request: very simple tablet-friendly touchscreen navigation - "tap zones"

[fizzybrain]

I know that the common touch screen tap-and-drag functions could be difficult, but how about this simple way to improve touchscreen functionality in, for example, a digital photoframe? - "Tap zones"

SIMPLE: A mouse click (or tap) on the left side of the image goes to previous image, a mouse click on the right side goes to next image, like left and right cursor keys. I have a tablet running linux and without any configuration any tap seems to act as a mouse click; I imagine this is pretty standard.

BETTER: there could be multiple zones for different functions - consider a 3x3 grid, for example:

 Show info |  Zoom in  |   QUIT
-----------+-----------+----------
  Previous |   Pause   |   Next
-----------+-----------+----------
   Action  |  Zoom out |   Menu

I feel that this - or the simple left/right version at least - should be pretty easy to implement (but not easy enough for me to do it, ha ha).

It would also be good for single-button pointing devices, accessibility aids, and even just for regular mouses.

Thanks for feh, it is excellent!