Hello all,
Does anyone know what the minimum install is needed to get a Qt4 program to run on a BeagleBone Black?
I’m trying to get a kiosk type program running with a 7" touchscreen. I have tried various LCD capes and have narrowed it down to a Newhaven NHD-7.0CTP-CAPE. That screen has a capacitive touch instead of a resistive touch and seems to work a lot better. The capacitive touch doesn’t have the calibration issues I saw with the resistive touch.
Starting with this image:
https://rcn-ee.net/rootfs/bb.org/testing/2018-01-14/stretch-console/
I have verified that the LCD and touch work using the ts_test program from the libts-bin package (thank Robert for adding the libts packages!).
I have also tested the LCD and touch with SDL1.2 (again thanks to Robert for adding libsdl1.2* with directfb and libts support!).
Pygame also works fine with the updated libsdl1.2*.
Great! I know the screen “works”. Now hoe do I get a Qt4 program to work? I have tried a simple program but when I run it I get:
$ ./test
test: cannot connect to X server
The ‘-qws’ switch also doesn’t work. I think this is due to the Qt4 library not being compiled with the --embedded option (and possible other…).
I have also tried to use xvfb (Virtual Framebuffer ‘fake’ X server). But it either doesn’t work or I’m doing something wrong. When I try to run the test app I don’t get any error messages but nothing happens.
I don’t want to use a full X11 install due to the bloat. I just need a working X server so that the Qt4 program will run. I could try building Qt4 with the necessary options but last time I tried it didn’t work. I was able to get the program to run on the LCD but the touchscreen didn’t work. Of course that was with a resistive not the capacitive touchscreen. The other problem was it takes something like 40 hours to build Qt4. Agh…
Regards,
Hartley
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