How to use deprecated functions in Qt5
Hi, I am trying to build my application with Qt5, while keeping the source compatible to Qt4. I already have an idea how to do this in the project file and how to deal with the includes. Now I would...
View ArticleDeploy Qt 5.1 app on Linux
As most Linuxes (Linuxii?) only officially distribute 4.8, I would like to figure out how to distribute our app with 5.1, which we do on Windows and Mac. In the past when I have tried this by...
View ArticleQML, OpenGL e Android
Salve a tutti, nella mia nuova applicazione dovrò utilizzare la libreria seriale e l’OpenGL principalmente. Mi sapreste dire quale è la scelta migliore per realizzare la mia applicazione, tenendo conto...
View Articleqgraphicsview/scene: x32 mingw qt executable under Win7 x64 works unexpected way
Hi all! When I start on my computer (WinXP x32 with Qt 5.1/QtCreator 2.7.2) the binary with appropriate dll’s, I see those pictures: But when I start the same on the Win7 ×64 I see no splash, no score...
View ArticleQt5.1 failed to load platform plugin xcb
i’m using ubuntu 12.04 and qt5.1. i compile my project with no errors but when i try to launch my application on other machine i get the following error: Failed to load platform plugin...
View ArticleHow to have one logic object with multiple custom widgets for representation?
Hi there, I want to write an application where I have one separate object handling the logic to which I can connect 1 to n independent custom widgets. These custom widgets should be able to send user...
View Article'plugin and paint' example cannot open file "plugin\pnp_basictoolsd.lib" error
I am learning from official Qt5.0.2 examples. I have plugandpaint and plugandpaintplugin example copied into my workspace and built them ok. The lib and dll files are created in the right location as...
View ArticleQSpinBox Button Size
Is it possible to change the size of the +/- (up/down) buttons on QSpinBox? I would like to use it on a touchscreen but the buttons are too small for use without a stylus. The width is especially too...
View ArticleAdding extra classes when building for cross-compilation
I followed the procedure in “Qt 4.7.1 for QNX systems” to achieve cross-compilation. This is the content of the readme.txt file you find when you download the “qt_qnx_2011-02-24b” from Foundry27 qnx...
View ArticleDynamically generating QML
I am very attracted to QML for controlling the entirety of a UI but I am wondering how flexible it is for handling cases such as having the user decide how many rows or columns to split a window. It’s...
View ArticleQFormLayout: Setting Font Size
I have a simple QFormLayout and have assigned some labels to the row fields like so: labelSavedGameCreatedDate = new QLabel("n/a");...
View ArticleHow fast and demanding can HTML5 detailed pixel rendering be in QML?
Since QML is rendered with OpenGL, is an HTML5 Canvas component considered quite high performance, nearly to the degree as custom OpenGL? From everything I have read, it is not currently possible to...
View ArticleHow to convert QString to QBitArray?
Dear all, I would like to convert QString to QBitArray. eg., QString "10110" QBitArray 10110 How can I convert that? Parse each character and convert to int, and then assign to...
View ArticleQNetworkRequest and FTP Raw Commands
Hi, can I use QNetworkRequest to send FTP Raw commands to server? In example NLST LIST in order to retreive the list of files contained in a FTP directory? Thanks in advance. This question is for Qt...
View ArticlePredicting Text Clipping with an Internationalized Application
I am working on an application which has been translated into 15+ languages. We wrote this generic code to traverse through the widget hierarchy and calculate text width and compare it with the content...
View ArticleI have updated my tablet "Nexus 7" to version 2.2.2. and now the "QT" not...
I’m working on Windows 7 with QT Necessitas. Yesterday I bought “Nexus 7” tablet. I have configured the QT and I have installed the drivers for the nexus 7. Everything worked perfectly until I updated...
View ArticleVariant properties in Design mode
I intend to use a variant property like: property variant target property string changeStateTo and change target in Design mode by “SetExpression”. In order to change its state later on a button click:...
View ArticleStrong Flickering in QGLWidget as viewport
I use Qt Gstreamer to push video streams into Qt. I build program that used 2 ‘videotestsrc’ gstreamer elements and render it into QDeclarativeView. I used for it 2 QGst::Ui::GraphicsVideoSurface’s,...
View ArticleQt http bad request on google
I’m trying to create an url shortener app using google’s url shortener api (https://developers.google.com/url-shortener/v1/getting_started#shorten). The problem is that I get a bad request. Here is the...
View ArticleQtQuick controls to mobile platform
Hi, I’m developing my application using QML interface and in particular the QTQuick Controls elements, that are like the desktop GUI, but made by QML (with all its benefits). My doubt is, when I put my...
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