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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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How to emulate a QPushButton click in Qt with QEvents

I have a custom input device on and embedded system, and have to translate the input to proper events in Qt. In my current view I have a QListView and some QPushButtons. I use the following code in my widget. QKeyEvent * e = NULL; if (cmd.up.value) …
anr78
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How can I change the cursor shape on QWS ?

On X11, Qt supports the Xcursor library, which allows for full color icon themes. I can change the cursor: QPixmap cursor(":/res/cursor.png"); mCursor = QCursor(cursor,-1,-1); setCursor(mCursor); But on QWS,the effect is very bad.I want to change…
Carina
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How does windowing work in qt embedded?

How does windowing work in qt embedded, where Qt is drawing directly to a framebuffer instead of through a separate windowing system? Can I run multiple programs at once? Do I get compositing and the little [x] button, maximizing and so forth?
joeforker
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Is there any Opensource Browser for touchscreen device?

I need internet browser on my device which has 4.3 Inch screen with 480x272 resolution, I am using embedded Qt 4.6.2 on embedded linux. Micro-controller has ARM9 with 450 Mhz. Requirements for browser are Touch Screen Support, Panning ( No Scroll…
SunnyShah
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Use Clipping in Qt

Is it possible to use clipping in an widgets painEvent, if the widget is using stylesheets? The background and reason for my question is that I want to make the widget animating when it appears and disappears. (Something like a resizing circle or…
exilit
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Qt embedded screen rotation inside app

In our target device, we run our QtE app with -qws argument. To rotate the screen, we specify "-display transformed:rot90" as the app argument and it works well. However, we have a feature to rotate screen inside the app, so we try below API…
wthung
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How to run simple Qt application with out net support in kernel?

I have a simple qt application for arm based board, build with yocto and I am trying to run that in target. without net support in linux I am getting error like below. root@ek:~# mainwindow QWSSocket::connectToLocalFile could not connect::…
Pala
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reading data from linux input on embedded board

i compiled the following code for arm9 board. whenever i press any key the event should be detected. keypress.ccp: #include "keypress.h" #include #include KeyPress::KeyPress(QWidget *parent) : QWidget(parent) { myLabel…
geek
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Qt 4.8.4 Cross-Compiled for Embedded Linux fails with QNetworkProxy Error

I'm trying to cross-compile Qt for embedded Linux with the following options: (cd /home/user/proj/output/buildroot/build/company-qt-4.8.4; PKG_CONFIG_SYSROOT_DIR="/home/user/proj/output/buildroot/host/usr/arm-buildroot-linux-gnueabi/sysroot"…
PhilBot
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Qt QSharedMemory How to Update Shared Memory Location

I have a library ( testlib-lib.so ) that is linked against by 2 different Qt Apps. My problem is that I cannot update the shared memory after initializing it. void TestLib::createInitialSharedMemory() { // Create shared memory qDebug() <<…
PhilBot
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qdbus and marshalling of custom types

I'd like to send a custom c++ class through the Qt DBUS API. I've created the class from the .proto file using the protoc compiler and added them to my project in QtCreator. Now I want to verify that I can send the custom class as a QVariant through…
PhilBot
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QWebView setContent in a separate thread

I have an application that requires to use QWebView::setContent() to load some HTML content to a QWebView. All of this happens on an embedded device with ARMv5 processor (think 400 MHz). Most of the time, I can load the page in reasonable time (up…
Michal Kottman
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C++ QT4 Converting a string to keycode?

I'm attempting to build a virtual keyboard using QT Embedded. I'm using QWSServer::sendKeyEvent() to send a key press which expects the unicode value of the key. Is there an easy way of converting from a string ("A" for example) to its key press…
Xleedos
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Directfbgl with Qt-4.6.2

I am using Qt-4.6.2 cross-compiled for Linux/MIPS device with directfb-1.4.14. I am trying to create overlays on top of my QT application which plays some videos. Recently on directfb website in news, it was updated that Qt applications on DirectFB…
Lata Agrawal
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QGraphicsDropShadowEffect hogs cpu on embedded system

I created a widget that serves as some kind of popup window und hence should have a drop shadow all around to optically raise it from the background. I initialize the drop shadow effect in the constructor of my popup widget as follows: dropshadow =…
arne
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