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.

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No matching fbConfigs or visuals found, while openning Qt Creator over SSH

I have Qt 5.12.7 64 installed on Debian 9.12, these are running on vmware on Windows host. Then I use macOS and ssh into debian. And I tried to open Qt Creator and got: $ ~/Qt5.12.7/Tools/QtCreator/...
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38 views

Is my graphics driver and opengl properly installed?

I got some suspicious outputs related to graphics and opengl while looking around an install of Debian 9.12 64 on ThinkPad X200s. Perhaps you guys can tell me if the following looks fine? I tried to ...
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1answer
3k views

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 ...
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3answers
1k views

Which package provides qmake on Fedora?

I'm having trouble determining the Qt package that provides qmake on Fedora 31. I already installed qt5-designer qconf qt5-devel qt5-qtbase qt5-qtbase-devel qt5-qttools qt5-qttools-devel (and ...
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330 views

Out-File: cannot find part of path

I tried to follow this tutorial that explains how to download a static mingw builder for Qt, but I got this error. I did follow the steps that were mentioned. Does anyone know how to fix this issue? ...
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98 views

GTK Dark themes on QT applications?

I'm using Arch Linux with Xfce desktop environment. I want to apply Plata GTK DARK theme for QT apps. I've changed /etc/profile, but I've some bugs with themes. Menu called by right-click is with ...
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153 views

How to change qt5 color scheme permanently?

I am trying to fix some colors in qt5 applications. I'm using a dark theme and some of the text colors are not bright enough on the dark background. However, I am very confused about how to achieve ...
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0answers
59 views

VisualStudio2017-Qt5.12.3 - cannot add msvc2017_64

I want to build a Qt GUI app using VS2017, so I installed VS2017 and Qt5.12.3. And also the VS-Qt add-in. But when I setup this, I can't add msvc2017_64 into it. When I click "Add", there is an ...
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1answer
21 views

Can't install “qt-examples” and “qt-docs” packages because dependency is too new?

What is wrong with my repository? Why can't I install qt-examples? How do I fix the repository? $ sudo yum install qt-examples [...] Error: Package: 1:qt-examples-4.8.7-2.el7.x86_64 (base) ...
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96 views

Raspberry pi Qt bluetooth module non functional ,dummy backend running

Hello I am working on a project where i use Qt creator on ubuntu 16.04 to cross-compile on raspberry pi 3b +. for my project requirement I need to use Bluetooth with Qt environment hence QtBluetooth ...
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1answer
150 views

Connect to Enterprise WiFi network issue

I configured the Radius Server on Windows Server 2016 and I want to connect to Enterprise WiFi network using my application. I tried to do the following steps: Set the profile without credentials ...
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21 views

All Qt-based applications (softwares, such as VLC, Calibre, Krita, MalwareByte) on Windows 10 run in the background but their GUI aren't, why?

I have some bunch of Qt-based softwares (such us VLC, Calibre, Krita, Mendeley Desktop, MalwareByte, Free Download Manager) which run in the background but not show any GUI in a Windows 10 machine. ...
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1answer
23 views

buid qt5.4.1 on centos5.5 error

I'm ready build Qt5.4.1 on Centos5.5, according this https://kate-editor.org/2014/12/22/qt-5-4-on-red-hat-enterprise-5/。 and now i got some problem when build qt src。 when i do the make command, it ...
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296 views

Cannot create a directory : Permission denied

I downloaded the qt creator on ubuntu 18.04, and running a application,done with all kit configuration but getting the error "Failed to create remote directories: mkdir: cannot create directory" ...
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126 views

Error when opening Minergate-gui on Debian 9

I'm trying to install Minergate-GUI on my Debian 9 to mine some coins. I downloaded the Minergate-GUI installation file MinerGate-xFast-GUI-1.5-ubuntu.deb (yes Ubuntu) from the official website and ...
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163 views

Cannot run: No command given

I am working with qt creator and I created one simple application. When I run it, it outputs: Cannot run: No command given How can I fix it?
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1answer
23 views

Bluetooth characteristics scan

I am developing a bluetooth application for an embedded linux device. On the hardware I have an IMX 6 MCU and EMMY W161 communication module. The operating system is a Yocto Project distribution (Poky)...
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13 views

Qt kits have yellow yellow arrow sign. Can't compile code

I am using qt open source version 5.13.0 clang for c++ language. It has worked fine for a couple weeks. Now, all of sudden, it doesn't compile and is showing a yellow colored yield sign in front of ...
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108 views

Qt Designer's designer.exe doesn't start

I've been trying to install the qt designer for windows, I've tried using two ways, the installer, and pip install pyqt5 then pip install pyqt5-tools And I faced the same problem which is the ...
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116 views

Unable to compile out of the box Qt Gui App in the Visual Studio extension C++

I was banging my hand against this wall, attempting to install the qt Visual studio tools, both VS and the Qt extension are the latest 2019 version, with the Qt version 5.13.0: Basically after I've ...
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69 views

Amazon Linux Install qt5 needed

"This application failed to start because it could not find or load the Qt platform plugin "xcb" in ""." Hey everyone. Can anybody help me with this missing plugin that's causing a software not to ...
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61 views

qt c++ creator dont autocomplet

I have an issue with my qt creator, it don't autocomplete and not run any simple program, Can you help me please. I have already installed all packages : install libgl1-mesa-dev and build-essential. ...
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111 views

Yocto meta-toolchain-qt5 qtwidget raspberry pi zero compile Error

I got following error while i compile yocto bitbake meta-toolchain-qt5, the error related with qtwebkit. My target machine is raspberry pi zero armv6 hf. Here my host PC: OS Linux Ubuntu 16.04, CPU ...
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834 views

Failed to install Qt on Win10 WSL2 (ubuntu 16.04) with error: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'

When i tried to install Qt on WSL2 ubuntu, i got below errors: root@sun-pc:/mnt/e# ls -l qt* -rwxrwxrwx 1 sun sun 157714525 May 30 09:51 qt-creator-opensource-linux-x86_64-4.9.1.run -rwxrwxrwx 1 sun ...
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0answers
14 views

Two installations of Qt on OSX?

My setup (OSX 10.13.6) appears to have two installations of Qt5: one in /Library/Frameworks (/Library/Frameworks/QtCore.framework, /Library/Frameworks/QtGui.framework, etc.), but I also have one ...
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120 views

install latest QT version on Debian via repository

I have updated my Debian 9 stretch machine and installed qtcreator and qt5-default. However, the Debian repository only offers version 5.7 of qt5-default, while the QT website offers version 5.13. ...
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90 views

Boost Message Queue Failure between QT and MSVC

I would like to establish a low rate data transfer through Boost Message Queue library between two processes. Process #1: A C++ project compiled in Visual Studio 2017 (vc140). Process #2: A QT C++ ...
1
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1answer
396 views

QT android make returns cannot find -lc++

I'm on Pop!_OS (ubuntu based distro) running Qt creator 4.9.2 with Qt 5.13.0 and am currently trying to build an app for android. When I try to build my app for desktop I have no error, but when I try ...
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0answers
32 views

Source-code-compiled qt on command

Backstory I am using opensuse, there are built-in qt4 and qt5 in my system. I need more complete tools from qt for compiling a file, that’s why I installed from source code via qt website. I have ...
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1answer
603 views

How do I fix this error in VS Code with Python 3 and Anaconda?

How do I fix the error below, so I can open a .jpg image? Warning: QT_DEVICE_PIXEL_RATIO is deprecated. Instead use: QT_AUTO_SCREEN_SCALE_FACTOR to enable platform plugin controlled per-screen ...
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35 views

Error in qt creator on linux. Don't find gcc library

Please help me. I dont understand, why QT creator does't debug my project. It produces the following errors: cannor find -lgl linker command failed with exit code 1 (use -v to see invocation) ...
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18 views

RPi2 from Windows cross compilation Error “The test for linking against libxcb failed!”

Error in Cross Compilation, I am using Qt5.0, Windows10, Raspberry Pi 2. I was following this tutorial and the process failed at step 16 and tried with its suggestion but cannot find a solution. ...
4
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1answer
2k views

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 (...
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1answer
64 views

Gimp on W10 install qmlexporter.py

Need you help: I installed GIMP 2.10 and wanted to also use the plugin qmlexporter.py but it will not work, just by putting into the plugin folder. Info states:https://doc.qt.io/qtcreator/quick-export-...
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25 views

QT for Mac doesn't work. It won't output a terminal screen

I'm new to Qt on Mac, and I just want to get to know Qt better. I tried to run a hello world but nothing happens, there's no output screen/terminal to display the text. My Qt is the latest online open-...
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59 views

How to start Qt Designer after Qt-5.12.3 installed?

Pls pardon me for asking such a stupid question. I really can not find where to start QtDesigner. I'm using Kubuntu-18.04.2 and have installed Qt-5.12.3 successfully. I can only start Qt Creator, ...
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46 views

ْQT Creator to use Desktop kit get Error with :“Application finished with exit code 126.”

I am using the QT Creator for my laptop (Linux LMDE 3 Cindy OS) And for Raspberry Cross-compiling. I have installed the QT based of this instruction and by this setting: mkdir ~/raspi cd ~/...
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0answers
406 views

Qt/Qml Error - Qml module not found(QtQuick.Controls.Material)

I recently decided to try out creating a gui for python with pyside and qml. I installed pyqt5, pyside2, qt designer and qt creator. The code I tried seems to work well, however, when I try to use the ...
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335 views

QT creator - issues getting started

Just finished my python course and trying to get started making GUI applications. Downloaded the open source QT. Running into problems off the bat. I make a new python window application, and keep ...
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3answers
3k views

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 ...
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1answer
105 views

QT scaling in ubuntu gnome creates big fonts

I'm using Ubuntu 16.04 with gnome, and I'm having scaling problems with some QT applications (VLC, TexStudio). I use a HiDPi external screen and when I disconnect my laptop from the external screen, ...
1
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1answer
81 views

Drag'n'drop doesn't work if app launched via python script from windows powershell

I have a QT app that I download and launch on Windows. If I launch it manually from Windows Explorer, I can use drag&drop to load files. If I launch the very same app via a python script from ...
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0answers
11 views

Compilation issues on a shared project (Qt)

I'm working on an already existing project. So the project folders and files are located in a shared folder (read, write and execute permission for everyone) on the development PC. The project runs ...
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0answers
173 views

qmldir: plugin cannot be loaded for module “myplugin”: module namespace QuickQanava

I am using qml with QuickQanava for loading a plugin and I am getting error while loading the 'QuickQanava' plugin from my QML file in windows and I have built my application using Visual Studio. I ...
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1answer
19 views

Random Underlines in QT Program

I found that almost all QT programs have the problem. For instance, VLC OS: Arch Linux QT version: 5.12.1-2 Questions: - Why there are so many random underlines in qt programs? - How to fix that?
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1answer
72 views

#include <QGL> QGL: No such file or directory

I've got a problem my dudes. For a school project, I must install some stuff to use a graphics library in c++. The lib is called libQGLViewer. I'm using Linux Mint. The problem is the following: ...
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1answer
83 views

Create file.desktop on ubuntu for a Qt GUI Script

I have a simple GUI script written in python3 ,Qt5. in folder of project exist an icon folder that are contain icons used in app.I created a app.desktop file in "/usr/share/applications/" : [Desktop ...
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1answer
3k views

What is wrong with my Qt environment? It reports “could not find or load the Qt platform plugin ”xcb“ in ”“.”

Five months ago I upgraded from Ubuntu 16.04 to Ubuntu 18.04. Following this upgrade several Qt applications no longer worked for me. Instead of starting up I would see errors such as: $ git cola &...
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0answers
30 views

Caret in Qt application has little triangle on the right

When I type into text field in Qt application (SQLite Studio), I see a little triangle on the right side of blinking caret: Lorem ipsum I pasted to the field using middle click before. This caret is ...
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0answers
88 views

When I copy data from Qt-Creator to Excel, the tabs are turned into spaces

I am using Qt-Creator to edit a file which contains lines of tab delineated data, and I have white-space rendering turned on in Qt-Creator, so I can see the tabs. When I copy this data into an excel ...