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.

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How to perform Qt installation

I downloaded qt-opensource-linux-x86-5.4.1.run but how to install it on ubuntu 14.04LTS? This is the output which I get: administrator@pc-7:~$ cd /home/administrator/Downloads/FlareGet/Applications ...
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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 ...
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2answers
3k views

Ubuntu Qmake is not an executable

I have the latest versions of qtcreator, qt5-qmake build-essential and g++ installed. In option of Build & Run and choose qmake in /usr/bin/qmake I get this error: The qmake executable ...
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3answers
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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 ...
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1answer
251 views

How to install Qt5 X11 Extras module in Ubuntu 12.04?

For my build on travis CI I need qt5 x11extras addon. I tried to add ppa:ubuntu-sdk-team/ppa but cmakes find_package(Qt5X11Extras REQUIRED) still fails. Where the heck does ubuntu hide the qt stuff?
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0answers
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Opengl for Ubuntu14 (building QT 5.4)

I have a fresh install of Ubuntu 14 LTS from this morning, I am using a PC with Nvidia graphic cards and I have successfully installed the latest version of the driver from the Nvidia website ...
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99 views

“error: cannot find -lGL” in Qt creator 5.5.0 on Ubuntu 14.04 LTS

I am trying to build and run a sample program on Qt creator 5.5.0 and Ubuntu version is 14.04 LTS. Every time its giving an error cannot find -lGL and id returns exit 0. I tried to resolve this ...
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1answer
85 views

Unable to install QT5 .run file on ubuntu

I know that to install .run files, I need to do chmod +x qt.run ./qt.run But it seems the ubuntu is not trying or able to run the executable. I even tried appending the sudo but it doesn't work. ...
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1answer
357 views

Error: PyQt5 requires Qt v5.0 or later

I want to install PyQt5 on Ubuntu 14.04.2. Once downloaded and uncompressed, I run python configure.py as it is mentioned on the previous link. However, it asks me to install QT 5 or later. Which ...
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1answer
99 views

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 ...
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1answer
29 views

Deploy application with Qt5 to 12.04

I need to deploy my application which is depend on Qt5.x. No problem with that on 14.04+, but for 12.04 users there is seems to be no way to get qt5 from standard package repository. I'd like to pack ...
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84 views

Getting error: Unknown module(s) in QT: webkitwidgets in QT 5.2.1 in Ubutu 12.04

I have built Qt 5 libs from source into Ubuntu 12.04 and made a Qt test app. In .pro file I have written QT += core gui webkitwidgets to use Qwebview in my test project. But when I run qmake into Qt ...
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1answer
148 views

How to open a browser when the TextEdit::onLinkActivated signal is received

I'd like to open a browser window to display the URL received by a TextEdit onLinkActivated signal. Is it possible to perform such call from the QML application?
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0answers
51 views

How to make an online, offline app with cache

I just wanted to know how I can do this. For example, I want to have an app that's linked to a WordPress site and when I'm connected to the internet, I want see everything normally, but when I'm not ...
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0answers
64 views

Ubuntu web browser not loading in 14.04

I am on Ubuntu 14.04.2 32 bit platform. When I launch ubuntu web browser GUI window opens but it's white empty. I launched it in terminal /usr/bin/webbrowser-app it's the same, it only prints: ...
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90 views

Static QT libraries for Ubuntu 14.04

Is there a package which contains all static QT 5 libraries? There are only some static libraries in the qtbase5-dev package (and its dependencies). To be more precise, the static versions of Qt5Test, ...
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250 views

Default installation prefix QT5 / QT5 Widgets Ubuntu

I have a CMake project. I am trying to switch from QT4 to QT5. find_package(QT5Widgets REQUIRED) EDIT HERE IS A TYPO problem solved (Qt5... instead of QT5...) already gives me By not providing ...
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178 views

How to show the menus for a window in the window's title bar in KDE Plasma 5

I installed both the 'appmenu-qt' and 'appmenu-qt5' packages on a fresh install of Kubuntu 15.04. Then I looked in 'System Settings > Application Style', but found no options to enable the appmenu. ...
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Problem with installing Qt5.3

I am trying to install Qt5.3 into my Ubuntu 14.04(64 bit). While installation process was running suddenly it was showing some prompts and showed several error messages as following: Error during ...
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7answers
11k views

How do I install Sigil?

Is there a ppa I can use to install Sigil in Ubuntu? The old ppa:rgibert/ebook doesn't work for me any more.
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1answer
18k views

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 ...
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180 views

This application failed to start because it could not find or load the Qt platform plugin “xcb”

In a fresh installed system(Ubuntu 14.04.2 LTS), I can run Qt5 apps(like shadowsocks-qt5, qtcreator) without this error. But after a few days of using, this error suddently occured when I ran the ...
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343 views

use qt multimedia under 15.04

Ubuntu is missing the gstreamer0.10-ffmpeg packages quite a long time now. if i install them from the ppa of mc3man i can get my Qt 5.4.1 application running on 14.10 but on 15.04 i get on error, that ...
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120 views

Unmet dependencies - NEED HELP!

I am using Ubuntu 14.10 with LXDE. I downloaded libopenshot 0.0.4 sources and I need to compile them. For this I need a few packages, but I cannot get one of them (qtbase5-dev). I typed in a Terminal ...
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2answers
337 views

QML app with C++ plugin (cmake) adding resource file

How to add qrc file to "QML app with C++ plugin (cmake)" project ? I can't find a working instruction. I found only one thing, add this to CMakeLists.txt: qt5_add_resources(RESOURCES ...
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0answers
144 views

How can I get menu items in a Qt Quick application?

I'm using Qt Creator 3.1.1 on Ubuntu 14.10 (the version installed when you install Ubuntu SDK - the two seem to be the same application). I'm running the default Unity 7 desktop. When I create a new ...
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1answer
3k views

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 ...
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1answer
10k views

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 ...
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0answers
83 views

ubuntu-sdk showing blank spaces where icons should be

When I launch Ubuntu-SDK in Ubuntu 14.10 (64-bit) every Qt Creator aspect works normally except all the content that was specifically added by canonical. This is especially annoying in the 'Welcome' ...
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1answer
89 views

how to build simple program run from terminal in ubuntu [duplicate]

I'm writing simple program in c++ using netbeans. I want it should be executable thru ubuntu terminal as other do like "php samel.php" it works I want something like this please guide me how to do ...
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2answers
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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 ...
4
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2answers
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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 ...
3
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233 views

Simple OpenCV program crashes

I am currently having a problem. I am following the instructions given in this book "OpenCV 2 Computer Vison Application Programming Cookbook" for creating a simple image display program in OpenCV ...
6
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3answers
4k views

Missing documentation for Qt5 on Ubuntu 13.04

I use Qt Creator for building applications and recently I decided to upgrade my Ubuntu from 12.10 to 13.04 and upgrade my current project from Qt4 to Qt5. The problem is that the Help section provides ...
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2answers
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Qt 5.4 supported .so files come with default Ubuntu 14.04 LTS Trusty or not

I am able to make deb file of Qt 5.2.1 app but not Qt 5.4 app in Ubuntu 14.04 LTS, 64 bit. I have seen that Qt .so files present at the path /usr/lib/x86_64-linux-gnu/ are Qt 5.2.1 compatible not ...
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0answers
114 views

Unable to make deb file of Qt 5.4 app in Ubuntu 14.04

I am able to make deb file of Qt 5.2.1 app in Ubuntu 14.04 but unable to make deb file of Qt 5.4 app in Ubuntu 14.04 and got below errors. //usr/lib/x86_64-linux-gnu/libQt5PrintSupport.so.5: ...
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1answer
124 views

Luminace HDR , Qt5

I was installing luminance hdr by using the command cmake src I Got error : CMake Error at Libpfs/CMakeLists.txt:15 (qt5_use_modules): Unknown CMake command "qt5_use_modules". Then i tried to ...
0
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1answer
174 views

No option for C++ in Qt Creator (for project)

I've installed the Qt 5.4.0 for Linux 64-bit (542 MB) on gnome ubuntu 14.04, When I started new project, I couldn't find the "Qt C++ Application" tab. There is option for C,QT,BLACKBERY....... But no ...
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154 views

vlc-qt libraries not working in Qt 5 in Ubuntu 14.04

At my end vlc-qt libraries working in Qt 4.8.6 but not working in Qt 5 in Ubuntu 14.04. In Qt5 vlc-qt libraries compiled successfully but getting crashed while run the project into Qt5 in Ubuntu ...
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3answers
10k views

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 ...
3
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2answers
2k views

Qt 5 configuration

I have a problem setting Qt5 apps correctly on my computer. I'm running Ubuntu 14.04 with KDE4, I have configured the look in the KDE system settings and that look is used in every qt4 apps and gtk ...
0
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1answer
229 views

Ubuntu-SDK cannot start qtcreator

I cannot start qtcreator with ubuntu-sdk installed. I'm getting error: void DBusMenuExporterPrivate::addAction(QAction*, int): Already tracking action "Follow Symbol Under Cursor" under id 142 ...
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210 views

Broken QT5 packages are in release 14

Fresh Ubuntu 14.04 install. Tried this on two different machines. Same problem: tstimac@promel:~$ sudo apt-get install build-essential qmlscene qt5-qmake qt5-default qtdeclarative5-dev ...
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0answers
651 views

How build against qt 5.3.1?

Trying to build qt-creator v3.2.2 from source on Ubuntu 14.10. Fails. Qmake can't find qt5.3.1 $ qmake -r ... Project WARNING: QmlDesigner plugin has been disabled. Project WARNING: This plugin ...
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2answers
59 views

Permissions for thumbnailer on device

I'm developing an application for U-Touch that gets a thumbnail from a video in C++ code using libthumbnailer system library. The app does the thumbnailing perfectly in my computer, but when i try to ...
0
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1answer
461 views

Cannot cmake mirall because Could NOT find Qt5Keychain (missing: QTKEYCHAIN_LIBRARY)

I am trying to compile Mirall on my Ubuntu 14.04.1 LTS. Here is the command I am using: cmake -DCMAKE_BUILD_TYPE="Debug" ../mirall ...
0
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2answers
370 views

How to Integrate of Python 2.7.4 in Qt 5.0

I have Python 2.7.4 installed,Qt 5.0 installed,PyQt 4.10.4.tar.gz and sip 4.15.5.tar.gz. How can I integrate Python with my Qt?
3
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1answer
393 views

How to access geolocation information on Ubuntu Touch?

It's strangely hard to find any documentation on accessing geolocation information for Ubuntu Touch specifically and even Qt5 more generally. The Qt Mobility APIs provided this in Qt4, and they seem ...
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1answer
975 views

qt project compile error cannot find -lGL

I tried to compile Qt(5.3.1) example project but the following error comes up /usr/bin/ld: cannot find -lGL What does it mean. This error doesn't come up when I compile it in Windows. So How do ...
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0answers
113 views

Unable to build QtQuick 2 projects

I'm running Xubuntu 14.04, and I have the following packages installed: qt5-default (5.2.1) qtcreator (3.0.1-0ubuntu4) qml (5.2.1-3ubuntu15.1) They were installed from the official repos and are ...