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Questions tagged [qt5]

Qt 5 is the 5th major version of the popular GUI toolkit for implementing graphical applications. This version contains major changes, and Qt Quick is central to it.

Qt 5

Qt 5.0 has been released. Check out the Qt 5 landing page [qt-project.org].

Mission of release

Qt 5.0 will be the foundation for a new way of developing applications, where Qt Quick is in the center of Qt. Qt 5 continues to offer all of the power of native Qt C++, and we don’t want Qt 5 to be disruptive for existing code developed for Qt 4.

Qt 5 enables highly sophisticated user experiences, offering applications the full capabilities of OpenGL/OpenGL ES graphics acceleration. In this respect, Qt 5.0 is a feature-driven release with time-to-market requirements especially for embedded environments. This implies that we should keep the scope of Qt 5.0 limited to the essential, and add more features and add-on modules in the upcoming minor releases.

Source: Excerpted from Qt 5.0 project page

237 questions
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What's the development package for Qt5 in 14.04

I want to build a Qt5 example on my desktop machine. I installed qt5-default and qtdeclarative5-dev, but I'm still getting this error: Project ERROR: Unknown module(s) in QT: quick qml Which package should be installed for compiling? In the Qt4…
marmistrz
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“Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed

I wrote application for linux which uses Qt5. But when I am trying to launch it on the linux without Qt SDK installed, the output in console is: Failed to load platform plugin "xcb". Available platforms are: How can I fix this? Maybe I need to copy…
locomotion
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How can I uninstall Qt5 that I installed from .run?

I installed Qt from qt-linux-opensource-5.0.1-x86_64-offline.run file. It works fine, but I am unable to use KDE libs in it. So can anyone please say how to uninstall it?? I could also not find any like uninstall or something in the installed…
shivshnkr
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What package do I need to build a Qt 5 & CMake application?

I'm trying to build sdrangelove, which wants Qt 5 and uses CMake for its build system, on Ubuntu 13.10. What package do I need to install to give it the file it's asking for here? There are a lot of *qt5* packages, and I've tried installing the…
Kevin Reid
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Ubuntu 18.4 libQt5Core.so.5: cannot open shared object file: No such file or directory

I have Ubuntu 18.04. While launching virtual box I am getting an error $ virtualbox VirtualBox: supR3HardenedMainGetTrustedMain: dlopen("/usr/lib/virtualbox/VirtualBox.so",) failed: libQt5Core.so.5: cannot open shared object file: No such file or…
jobycxa
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How can I install Qt 5.x on 12.04 LTS?

If you want to develop with QML 2.0 and Qt5, the base packages don't seem to exist in repository for 12.04. What PPA should I add? Is it a binary installer? a compile the toolkit yourself? Those aren't separate questions, they're just possible…
RobotHumans
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qt4 / libqt4-* in Ubuntu 20.04

Ubuntu 20.04 dropped qt4 and all libqt4-* dependencies in its official repos. My knowledge about version conflict and install-breaking actions is limited, so before any unthoughtful action is taken, I would want the community's take about…
Daniel B
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where is qt5 designer

I updated an Ubuntu 12.04 machine to 14.04. The 12.04 install just had qt4, and had /usr/lib/x86_64-linux-gnu/qt4/bin/designer The 14.04 install has qt5, but I cannot get a /usr/lib/x86_64-linux-gnu/qt5/bin/designer executable installed. I have…
KateF
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Qt5 installation and path configuration

I have installed Qt5 from the Qt5 project site, to the following directory /opt/Qt5 I would also like to mention that I had Qt4 installed previously, I have removed all instances of Qt4 through the software center. Now that I issue designer from…
Indian
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Ubuntu 14.04 QtCreator Qt5 examples missing

After upgrading to Ubuntu 14.04 I removed the official qtcreator in order to install the modified version from the software center because I'd like to try the SDK. Fortunately, the docs are now included in the official installation. Unfortunately,…
Nick Lehmann
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ImportError: No module named 'PyQt5.QtWebEngineWidgets'

I try to run a python script using PyQt5 QtWebEngineWidgets but it throws errors: from PyQt5.QtWebEngineWidgets import ( ImportError: No module named 'PyQt5.QtWebEngineWidgets' I think there is a package missing but which one?…
Michael
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Ubuntu 14.04 Qt5 development libraries?

I want to build applications requiring Qt5 via CMake. Which libraries do I have to install to achieve that? What I have tried so far is searching for anything containing qt 5 core and dev, but have turned up empty: apt-cache search qt | grep dev |…
codeling
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How will the Ubuntu Phone SDK impact desktop development

If I was to develop an application for Ubuntu after the Ubuntu Phone announcement, I would be concerned with several issues. I know that these things will not change immediately, but I'm thinking about the strategic decision to ensure good support…
tronda
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Suddenly Okular will not open any more

I have made my laptop double boot a few months again, with Ubuntu 18.04.1 . I have been working with okular to open pdf files (for the commenting option) but suddenly okular doesn't work anymore. When trying to open okular I get the following…
DeanTheMachine
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Installing Qt 5.5.1 on Ubuntu 14.04 - throws qt.network.ssl error on terminal

I am planning to install qt 5.5.1 on my ubuntu 14.04 running on virtual machine. I have downloaded the installer from qt-io and when I try to install the setup, I notice the below warning on my terminal, and then the installer pop…
user12345
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