Why Qt does not get touch event after re-plug the touch device?
-
Hello everyone
Have a good day.
I have a problem about touch device's hot-plug.
I set the environment variable as below.
export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/ts_uinput:rotate=0The "/dev/input/ts_uinput" is created by ts library's application "ts_uinput".
The touch function can work normally before I re-plug the USB touch device.
If I re-plug the USB touch device, the touch function doesn't work.
The "/dev/input/ts_uinput" still is created after I re-plug the USB touch device.
I also monitor the data in "/dev/input/ts_uinput" and it also has data report.
Why the Qt does not get the touch event after re-plug the USB touch device? -
Hi,
Are you sure about that creation ?
From an educated guess: when you unplug the touch device, the device file is not closed since it's opened by your application thus re-pluging it doesn't affect that device.
