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Questions tagged [qt]

Qt is a cross-platform application development framework widely used for the development of application software that can be run on various software and hardware platforms with little or no change in the underlying codebase, while having the power and speed of native applications. Qt is available with both commercial and open source licenses. Questions about programming with Qt should be asked on Stack Overflow.

Qt (pronounced officially as cute (/kyut/) though commonly pronounced as Q.T. (/ˈkyu ti/)) is a cross-platform application development framework widely used for the development of GUI programs (where it functions like a cross-platform widget toolkit), and also used for developing non-GUI programs such as console tools and servers. wikipedia

Qt was created by Trolltech, and was acquired by Nokia in 2008. One month after the end of symbian development at Nokia, Nokia decided to sell Qt. From September 2012 and until now Qt is managed by the Qt Company which is subsidiary of Digia.

Note that questions about programming with Qt should be asked on Stack Overflow, since programming questions are off-topic for Super User.

149 questions
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Enable Emacs-like keybindings scheme for all QT applications

As for GTK apps under Gnome environment it's possible to set all applications to use Emacs-like input scheme: $ gconftool --set -t string /desktop/gnome/interface/gtk_key_theme Emacs $ gconftool --get /desktop/gnome/interface/gtk_key_theme Emacs I…
PrecariousJimi
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How do I input Greek characters in Ubuntu?

I'm taking a course in Greek, and would like to be able to store notes and such on my laptop. I'm using Gnome, but I also use a flash card program called "Mnemosyne" that is written in Qt, if that makes a difference. I installed the "Greek" language…
Matthew
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3 answers

Can't skip login in Qt installer?

In the past, I have been able to use the Qt installers & maintenance tool without a login by agreeing to GPL licensing and pressing the skip button. But today I discovered that skip button is no longer appearing. Searching for this issue has so far…
01d55
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Arch on WSL: libQt5Core.so.5 not found, despite being installed

I was hit by some hardcore power-tripping forum mods on the Arch Linux forum, so here I am. I'm trying to run GUI apps on WSL, such as dolphin or kate. However, none of them can find libQt5Core.so.5, despite it being installed in /usr/lib as you'd…
Ripdog
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11
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4 answers

qtpy.PythonQtError: No Qt bindings could be found

I had anaconda running on my machine. few days ago i had to update some of the libraries because they were outdated. after the update, I was not able to launch anaconda-navigator or spyder anymore due to the following error: (base)…
samhar
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10
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1 answer

how to install qt5 in debian 11 stable?

I'm trying to play an NES emulator named punes, and on its github page, it says I need to configure and build manually. When I do ./configure, I get configure: error: Qt5 library not found. However, when I do apt list *qt5*, it gives me an extremely…
xdavidliu
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How to suppress QXcbConnection: XCB error

I'm using KDE Plasma under Arch Linux and there are a lot of logs such as kwin_x11[5129]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 11416, resource id: 56623191, major code: 20 (GetProperty), minor code: 0 in my journal. These…
Frederick Zhang
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8
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1 answer

Cedilla with ' and c (dead key) for QT apps

As a Brazilian, I want my american keyboard to use dead keys and to map cedilla (ç) to ' + c. The default mapping gives me ć. For GTK-based applications, this setup can be easily achieved by setting the following environment…
ivarec
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8
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1 answer

Suppress "qt5ct: using qt5ct plugin" message

Every time Octave draws a figure (eg graph), I get the following message: qt5ct: using qt5ct plugin How do I suppress it?
Tom Hale
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3 answers

How to install PyQT4 and what are the practical differences between PyQT4 and PyQT5?

I am about to start developing using PyQT, but there seem to exist two versions. Which one should I go for? Also, I cannot seem to be able to install either, using pip install PyQt4 I get the following error: Downloading/unpacking PyQt4 Could not…
Armen Michaeli
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1 answer

Black out application window on KDE Plasma after long uptime

After using for a long time, application window fails to render application windows. Problem: application screen sometimes blacks out (Attached image) occurs in any application (Chrome, Thunderbird, Alacritty, KSettings, Slack, Discord,…
yuki
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7
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3 answers

Qt install offline

Is it possible to install Qt toolkit without internet connection? I downloaded offline installer, but to begin installation process I need to log in Qt Account. Is there some way to skip this step? Or situation is something like this: no internet…
user1035174
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1 answer

MacPorts: How do I rebuild of a specific port?

How do I force MacPorts to rebuild a specific port? I manually made a change to a MacPorts makefile to link in a specific library, but the missing symbol still cannot be found. Perhaps I need to rebuild, but how do I accomplish that without cleaning…
tony19
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How can I make KDE and other non-GNOME apps inherit the Ubuntu theme?

I'm running Ubuntu (9.04) and have a bunch of different types of apps installed on my system: GNOME apps like Firefox, gEdit. KDE4 apps like AmaroK and KATE. Qt apps like VLC. Opera browser, which uses Qt for OS widgets but looks different to…
DisgruntledGoat
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5
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1 answer

How to use the QT file picker for both GTK and QT apps?

The file picker for GTK+ apps (eg. Firefox) looks like this: For qt apps (eg. nomacs) it looks like this: Is there a way to use the QT file picker for both GTK and QT apps? I am running arch 4.20 with KDE installed.
HanMah
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