It's likely something that is highly specific to your device.
What is it running to manage its GUI ?

So everything looks correct...

How are you loading your image in your application ?

@hskoglund said in How to analyze a KIT environment variable:

Hi, in a .cpp file you can use getenv(), like this:

QString target = getenv("TARGET");

Or qEnvironmentVariable which returns a QString.

@jsulm Sorry for the late response. Thank you very much for very clear answer. It helps.

@sierdzio thanks for the example, I think the resolution type is a bit misleading with regard to the reason the bug was closed.

@aha_1980
Hi again!
I created a bug report at https://bugreports.qt.io/browse/QTCREATORBUG-23295, lets hope that someone finds a fix. Thanks for your time!

@iman4k
I don't know, I'm not a cross compile expert by any means.
I'm just telling you want I can see from the configure you posted.

Anyway, should be easy enough to add
according to this
https://doc.qt.io/qt-5/qtvirtualkeyboard-build.html

you can simply open the qtvirtualkeyboard source project with QtCreator and compile it, using your cross compile kit

@jsulm
Yep, absolutely, there is much to read/fiddle with, and may not be portable. May or may not work for OP's particular case. Anyway, whether this or your core dump suggestion (OP should look up how his target Linux OS handles core dumps allowed or not), he has a few approaches to consider now....

AFAIK, the BPI is very close to the Raspberry Pi, you should take a look at this wiki entry.

By the way, why are you trying to build an outdated version of Qt ? The current LTS is the 5.9 series with 5.12 around the corner.

@SGaist

Thanks for the reply. Indeed you are wright. It is very easy actually. I just compiled qt4.8.6 for my system. Then I found the sqlite project in sqldrivers. Compiled this library for my system, copied it and it works!

Very easy. Learned again a lot!
Thank you all for the great support!

Just case: the latest version of Qt 4 is Qt 4.8.7.

@Pablo-J.-Rogina
Thanks for the time to make example code.
It didn't work straight away, this because I use qt4.8 and you the newer one probably.
So I changed your code to the older syntax to get it working.

I would like to thank you and all others for there help!
Again I learned a lot!

Thanks for helping!

@TMJJ001 I would not run this software on your PC - how would it communicate over canbus?
Instead you can provide the possibility to connect to this software (server) over network and then write client software for your PC which connects to your server software on the embedded device.

@jsulm

Sorry for the late reply.
There was an error in the .xml file and not in my code!
So I managed to solve the error.

Code works like a charm!

The solution to that problem is to insert the following call to the constructor of the file processing class:

QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));

Concerning the shell:
I use BusyBox (its light) which doesn't provide locale and the environment variables like LANG=en_US.UTF-8.
For compiling BusyBox configurations can or have to be given containing

CONFIG_LAST_SUPPORTED_WCHAR=0

the number is the last displayable number of the Unicode list, 0 signifies that all characters shall be displayed, it was set to 767 which includes west European characters. The excluded characters are replaced by the character defined in the same configs, in my case it is "?".

Because QWS is Qt 4 only.

@deleted184 said in Qt5.9 VNC Support:

Hi guys!

According to the changelog of Qt5.8, vnc is back. I'm currently on Qt5.9 and i was able to launch my application with vnc enable like this:

./myQt59app -platform vnc:size=272x480

Via my VNC client everything works very well, however i have nothing displayed on the screen of my board :( . Do you have any idea on how to launch a qt5.9 application on a board and have a remote access via VNC ?

I am using qt5.9 and i am able to start my qt application with vnc backend.However, when seeing from vncviewer or bnvc on android, i can only see a small part of my applicaiton( 1024x600 for my applicaiton , but on vnc client i can only see 1/4 part of the whole display).
The following is my procedure:
on my embedded linux server, run ./myQt59app -platform vnc:size=1024x600 in terminnal; on andriod ,using vnc viewer or bVNC to listen to ip address and port of my linux device. But both app can only see nearly 1/4 of the whole display.

What is your procedure?Thanks!

@Antonio-Ortiz

I am glad to see that you could solve your problem.

The wildcard option is quite helpful, but also quite dangerous, if you are not very careful.