{"id":845,"date":"2013-10-04T23:56:14","date_gmt":"2013-10-04T21:56:14","guid":{"rendered":"http:\/\/www.jensd.de\/wordpress\/?p=845"},"modified":"2013-12-19T12:42:59","modified_gmt":"2013-12-19T11:42:59","slug":"solved-egalax-touch-screen-issues-with-javafx-on-raspberry-pi","status":"publish","type":"post","link":"https:\/\/www.jensd.de\/wordpress\/?p=845","title":{"rendered":"Solved: eGalax Touch Screen issues with JavaFX (on Raspberry Pi)"},"content":{"rendered":"

In a former post<\/a> I wrote about my trouble getting touch support up an running with my eGalax Touch Display, JavaFX and the Raspberry Pi.
\nToday Simon gave me a hint how he solved that touch event issues with JavaFX. <\/p>\n

Many Kudos to Simon Ritter<\/strong> (@speakjava)!<\/p>\n

The Clue<\/strong><\/p>\n

It turns out that the screen driver actually creates two<\/strong> event devices in \/dev\/input<\/strong><\/code>: event0<\/strong><\/code> and event1<\/strong><\/code>. JavaFX sees \/dev\/input\/event0<\/strong><\/code> and assumes that events come from that, but for some unknown reason no events are actually sent: they all go to \/dev\/input\/event1<\/strong><\/code>.<\/p>\n

The Cure<\/strong><\/p>\n

Recreate \/dev\/input\/event0<\/strong><\/code> with the same device as \/dev\/input\/event1<\/strong><\/code>, so JavaFX gets the information it needs:<\/p>\n

\"eGalax_patch1\"<\/a><\/p>\n

Make it suitability for daily usage<\/strong><\/p>\n

Create an init-script to apply the patch at start-up:
\n‘Required-Start: $all<\/strong><\/code>‘ tells insserv<\/code> to start the script after all the other scripts, at the end of the boot sequence:<\/p>\n

[bash]
\n#! \/bin\/sh
\n### BEGIN INIT INFO
\n# Provides: egalax-patch
\n# Required-Start: $all
\n# Required-Stop:
\n# Default-Start: 2 3 4 5
\n# Default-Stop: 0 1 6
\n# Short-Description:
\n# Description: Recreates event0 with the same device as event1, so JavaFX gets the information it needs.
\n### END INIT INFO<\/p>\n

. \/lib\/lsb\/init-functions<\/p>\n

rm -f \/dev\/input\/event0
\nmknod \/dev\/input\/event0 c 13 65<\/p>\n

log_success_msg “eGalax Touch Screen patch for JavaFX applied.”
\n[\/bash]<\/p>\n

You can load it here<\/a>.<\/p>\n