I’m one of the persons which made 7" touchscreen interfaces for Photonic (including printflow). What Wes was trying to tell you (correct me if I’m wrong) is that the touchscreen interface is nothing more than a browser starting fullscreen on the touchscreen.
In the case of Photocentric we used the browser kweb since it doesn’t use too much resources. (Altough it still uses to many resources for photonic to still slice .stl files). When kweb is started it connects to localhost:9091/printflow
The printflow folder is an additional folder with webpages for the touchscreen, the vanilla version of Photonic currently hasn’t got these included.
But in the case of Photonic3D it has more dependencies than the normal vanilla Photonic. And the company that helpt me with it has hardcoded a lot for photocentrics specific machines (annoyingly much). So in order to get everything to work you still will need to tweak quite some things which might get hard without developer experiences. We do have a set-up script for this specific image but it won’t work out of the box with non photocentric printers.
I’m currently working on supporting other single board computers and together with Wes I’m looking into a skin selection option for photonic which also is able to handle touchscreen out of the box
If you want the printflow3d setup than my advice for now would be to just be patient. Unless your eager to learn some programming and linux ofcourse!