I'm so dumb that I explained the problem in the wrong way.
I used that script to install the waf!
The point, now, is to make the waf run in fullscreen mode.
I tried this code:
xev -name L:D_N:application_ID:someapp -geometry 600x800+0+0
using the app name: com.erez.fullgallery001
All I get is a full blank screen with a black square on the top left angle.
Here is the waf details: