On Fri, Jan 19, 2018 at 11:20 AM, Hartley Sweeten <[email protected]> wrote:
> 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...
So QT5 ( i know it's not QT4 ;) )
Has a direcfb that is currently disabled:
QPA backends:
DirectFB ............. no
EGLFS ................ yes
EGLFS i.MX6 ........ no
EGLFS i.MX6 Wayland. no
EGLFS EGLDevice .... yes
EGLFS GBM .......... yes
EGLFS Mali ......... no
EGLFS Raspberry Pi . no
EGLFS X11 .......... yes
It also has a tslib option:
tslib .................. no
https://buildd.debian.org/status/fetch.php?pkg=qtbase-opensource-src&arch=armhf&ver=5.7.1%2Bdfsg-3&stamp=1484191682&raw=0
we could try rebuilding 'qtbase-opensource-src' and see what happens..
Regards,
--
Robert Nelson
https://rcn-ee.com/
--
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