I recently did some maintenance on a linux-based kiosk project. It runs linux and has a rails application serving content. Firefox is running in a kiosk mode and there is no keyboard or mouse present.
In adding a touchscreen from a different vendor, I found some details that can help make a kiosk application more responsive to touchscreen taps.
If you use linux in a touchscreen implementation, I recommend staying away from linux drivers offered by the vendor if possible. These were very out of date and X refused to load them. Use evtouch if possible. Install the package:
apt-get install xserver-xorg-input-evtouch
Note that most of the parameters to the driver are meant to discourage it from giving us complicated mouse emulation behavior like mousovers, middle/right clicks, dragging, etc. It needs to be just the simplest it can be for kiosk operation. People will push buttons too long, unintentionally try to drag
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