Keyboard layout switching in Qt, not just in Qt for embedded Linux

__Alex__

Nobody at all?

SGaist

Hi and welcome to devnet,

One question first, which version of Qt are you using ?

__Alex__

Thanks for the welcome.

I am using Qt 4.7.4 (32 Bit) and QtCreator 2.4.1.
I work on Ubuntu 12.04, 64 Bit on a Virtual Machine.

SGaist

There's something I'm not sure to follow. You wan't plug e.g. an QWERTZ keyboard and then change for e.g. an AZERTY and let Qt handle that ?

Another question, what window manager will you be using ? Ubuntu's unity ?

__Alex__

Yes, I want to let Qt handle it. I would've liked to just call some qmap-handler-functions like you can apparently do if you use Qt for Embedded Linux, but for some reason it's not that easy in other Qt versions.

The whole thing will run on a hardware with a specialized Linux-Kernel without Unity. The display is a permanent camera stream und Qt takes up a portion of the screen. I don't know how exactly this happens, but I can ask around if it's important.

SGaist

Because it's not useful outside Qt Embedded since it's done e.g. through Xorg. But that doesn't answer the main question: what do you use as graphic server ?

__Alex__

We have no graphic server. We use an Atmel SAM9G45 board. On the following pdf on page 1052 is a block diagram:

http://www.atmel.com/images/atmel_6438_32-bit-arm926ej-s-microcontroller_sam9g45_datasheet.pdf

The "DISPLAY IF" output is connected to a display.

SGaist

Seems like my last answer disappeared, did you got it ?

__Alex__

No, sorry, I didn't receive it. Can you post it again, please?

SGaist

The question was: what will you be using (software speaking) to draw the video and the Qt GUI ? Linux frame buffer ? Also what distribution will be running on the device ?

__Alex__

We use the Linux frame buffer. It's a self-compiled distribution based on kernel 2.6.38 armv5tejl GNU/Linux (with udev).

SGaist

Then if you don't have any graphic server/window manager and are using the linux frame buffer then you have to use Qt for Embedded Linux. Or there's something I'm missing

__Alex__

Ok, too bad. I guess we'll have to try to switch our Qt version after all.

Thanks for the help!

SGaist

Before that, can you tell me what software setup you had planned ?

__Alex__

Can you elaborate on what you mean exactly?

SGaist

Simple what are the software architecture you want to use. Until now you wrote that your were using a self-built distribution with a custom kernel and not wanted to use Qt Embedded, but don't have any window manager nor graphic server.

So what would your software stack be ?

__Alex__

I don't know the exact software stack, but our Atmel board has frame buffer support and that's what we use for the graphics.

SGaist

So all in all quick version: -> kernel -> busybox -> Qt Application ?

__Alex__

Yes, that's right.

SGaist

Well, then Qt for Embedded Linux is the only option. Why did you want to use it in the first place ?