[Buildroot] [Bug 11666] New: Touchscreen with (Py)Qt5 should use tslib instead of evdev
bugzilla at busybox.net
bugzilla at busybox.net
Tue Feb 5 15:45:58 UTC 2019
https://bugs.busybox.net/show_bug.cgi?id=11666
Bug ID: 11666
Summary: Touchscreen with (Py)Qt5 should use tslib instead of
evdev
Product: buildroot
Version: 2018.02.9
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: Other
Assignee: unassigned at buildroot.uclibc.org
Reporter: tistolz at outlook.de
CC: buildroot at uclibc.org
Target Milestone: ---
Created attachment 7946
--> https://bugs.busybox.net/attachment.cgi?id=7946&action=edit
PyQt5 test application
Hello,
I compiled Qt5 with Tslib support (BR2_PACKAGE_QT5BASE_TSLIB=y), and
ts_calibrate and ts_test work properly. I also have a
/usr/lib/qt/plugins/generic/libqtslibplugin.so, so the compilation part seems
to have worked.
I created a tiny PyQt5 test application (see attachment), which creates 4
buttons. When I run this qt5test.py, the y-axis of the touchscreen appears
inverted (x-axis ok).
I've read
http://lists.busybox.net/pipermail/buildroot/2015-November/143571.html and from
that it seems that my PyQt5 application uses evdev instead of tslib for input.
I can use an extra environment variable:
~> QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS='rotate=180' ./qt5test.py
Now the touchscreen is indeed rotated by 180 degrees, i.e. the x-axis is
inverted while the y-axis is ok. Further trials with 'rotate=90' or
'rotate=270' changed the touchscreen orientation accordingly, but none is
usable to cancel the inversion of the y-axis.
What strikes me is that the above is an **evdev** option, despite the fact that
I want to use Qt5 with **tslib**. I've read about a "-plugin tslib"
command-line option, but that changes nothing with my Python script.
So I'm going to need either a way to switch to tslib (preferred), or a
QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS value that just flips the y-axis.^
Any help or info will be really appreciated.
Best regards,
Tibor Stolz
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