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Questions tagged [qtembedded]

Qt for Embedded Linux is a C++ framework for GUI and application development for embedded devices.

Qt for Embedded Linux is a C++ framework for GUI and application development for embedded devices. It runs on a variety of processors, usually with Embedded Linux. Qt for Embedded Linux provides the standard Qt API for embedded devices with a lightweight window system.

The official Qt documentation can be found here for Qt 4.8

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ERROR: Cannot compile a minimal program. The toolchain or QMakeSpec is broken

I am following this guide: https://www.interelectronix.com/qt-515-cross-compilation-raspberry-compute-module-4-ubuntu-20-lts.html But when I do: ../qt-everywhere-src-5.15.2/configure -release -opengl es2 -eglfs -device linux-rasp-pi4-v3d-g++…
Julian
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error while running a GUI application in mini2440 board

i am trying to run a GUI application inside mini2440(FriendlyARM board that runs Qtopia). I followed instructions from http://mini2440vietnam.blogspot.com/2011/05/programming-application-for-mini2440-by.html & the following from "tslib & Qt…
Preetam
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Crash in QRasterPaintEngine

We experience some random crashes in our application which uses Qt 4.8.6 embedded and couldn't find a way to trace the problem so far. Here is the backtrace : #0 qt_alphamapblit_quint32 (rasterBuffer=0xbec87f6c, x=-4662395, y=,…
Murat Şeker
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Korean font display in imx6q based board

I am working on a multi language application in Qt. I need to support Chinese, Japanese, Korean along with english. For that I have used "makeqpf" tool to convert ukai.ttf (supports chinese and japanese) and UnDotum.ttf (supports korean) font qpf…
Pavan
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Beaglebone Black with MIDI input (via USB) -> can't detect proper port

A few days back I wrote question regarding MIDI and ALSA, but I've since solved the problem and run into a new one. the context in short: I have a Beaglebone Black with debian 7.5 on it. My host is a 32bit Ubuntu 14.10 installation. I'm using…
poehalcho
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Issues with ALSA on Beaglebone Black and Qt: -lasound not found

I have a Beaglebone Black with debian 7.5 on it. My host is a 32bit Ubuntu 14.10 installation. I'm using Qt4.8.6 for arm cross-compilation I am trying create an application which uses a touchscreen and also reads MIDI input from a keyboard. I've…
poehalcho
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Installing Qt on Yocto

I am working on a project contains, “Renesis R-Car H2 board” with Yocto installed in it. I am trying to find a proper way to install Qt in Yocto. Actually my application is running very slow in Yocto. I think it’s because of wrong Qt configuration.…
Ansif
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Detect whether there is a qws server running

In order to properly launch a little Qt app on an embedded system, I need a reliable way to find out whether a Qt QWS server is already running. Otherwise I'd need to supply the -qwsoption to the app to run the server itself. Is there a way of doing…
Ber
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Qt/Embedded: Caps Lock is not working

I am developing an application with Qt/Embedded 4.8.4(c++ bindings).I found that enabling caps lock is not putting the characters in capital letter inside the edit-box. Here is a simple program for your reference, which is showing same behavior.…
manmatha.roy
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Which class to use integrate for DirectFB with Qt?

I want to integrate DirectFB with Qt. Which Qt class will be useful for it in Qt 4.8?
user3172864
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High CPU percentage, on creating/deleting QWIdget dynamically

I am building an application, which will be creating/deleting QMainWindow(along with a lot of QWidgets), on user input. One thing, which surprised me, is that the CPU usage keeps on increasing while the operation is going on.And It never comes down…
manmatha.roy
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How do you rotate qt embedded application?

I tried qt-gfx-transformed but it doesnt happen to work . Its showing error that transformed driver not found. Is there any way to rotate Qt application ?
Yogeshl
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Need to display in qtextEdit real time

I have an arm board with a touchscreen display, where I want to display the output from a certain function, vcm_test(). The output of this function is saved to a file called test.txt . Now I am able to read the contents of the file test.txt and…
rNov
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Qt GraphicsScene Background does not change

i am a newbie to Qt.i am handling canvas widgets through QGraphicsScene class.But i cant change the default white background of the widget.Here is the code.i have tried to use the QBrush to set the background.But it did not work.it remains…
manmatha.roy
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Qt QSharedMemory Segmentation Faults after Several Successful Writes

I'm using QSharedMemory to store some data and want to subsequently append data to what is contained there. So I call the following code several times with new data. The "audioBuffer" is new data given to this function. I can call this function…
PhilBot
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