eglfs has the evdev input handlers built-in, meaning that you will get mouse/keyboard/touch support without any additional plugins give that it is able to figure out the correct device.
In your case the touch events are coming from the evdevtouch plugin (the bits of it that are built into eglfs). With 5.1 evdevtouch failed to recognize the touchscreen on am335x, this is corrected in 5.2. This means that you can drop -plugin tslib and set the environment variable QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS to rotate=180 in order to get the coordinates properly transformed. If for some reason you still need to use tslib, things get a bit uglier since there is no sane way to disable the built-in input handlers in eglfs in 5.2. In 5.3 (dev branch) one can set QT_QPA_EGLFS_DISABLE_INPUT to get rid of all the built-in input stuff. Until that, you could provide a bogus device node in in QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS (e.g. set it to /dev/whatever) and launch the app with -plugin tslib. That should restore the behavior you get with 5.1. Best regards, Laszlo ________________________________ From: interest-bounces+laszlo.agocs=digia....@qt-project.org [interest-bounces+laszlo.agocs=digia....@qt-project.org] on behalf of Rogers Nate [nate.rog...@raymondcorp.com] Sent: Thursday, December 26, 2013 5:53 PM To: interest@qt-project.org Subject: [Interest] Touch screen events seem opposite in Qt5.2? I have been using Qt5.1.1 that I cross compiled for my am335x starter kit that has the TI SDK 6.0 on it. I am using the eglfs platform and the tslib plugin and everything works fine in Qt5.1.1. However I when I compile Qt5.2 all of the touch screen events are coming in opposite of what was actually clicked. For example if I click the top right of the Qt app it acts as if the bottom left was clicked. I even receive touch events when I remove the –plugin tslib line is removed from the command arguments. I am guessing something else is generating the touch events, but who? I am not sure why Qt 5.1.1 worked and Qt5.2 doesn’t? What did I break? Any suggestions on how I can figure this out? I am new to a lot of this stuff so any tips are appreciated, thanks in advance! Nate Confidentiality Notice: The preceding e-mail message (including any attachments) contains information that may be confidential, protected by applicable legal privileges, or constitute non-public information. It is intended to be conveyed only to the designated recipient(s). If you are not an intended recipient of this message, please notify the sender by replying to this message and then delete it from your system. Use, dissemination, distribution or reproduction of this message by unintended recipients is not authorized and may be unlawful.
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