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.

learn more… | top users | synonyms

1
vote
2answers
4k views

“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 ...
0
votes
2answers
338 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?
1
vote
1answer
20 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 ...
0
votes
1answer
28 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. ...
0
votes
1answer
37 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 ...
0
votes
1answer
107 views

Missing package in Ubuntu SDK - qtdeclarative5-ubuntu-webapps-api

Installing the Ubuntu SDK failed because of missing package qtdeclarative5-ubuntu-webapps-api this was the message from apt-get: The following packages have unmet dependencies: ubuntu-html5-sdk ...
0
votes
1answer
219 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 ...
0
votes
1answer
187 views

Qt5 opens multiple window

I recently installed qt5 and ubuntu sdk and i use 13.04 . In welcome section when i click develop,example or tutorial tabs multiple windows open up and I am unable to close it. How do i fix this. I ...
4
votes
0answers
632 views

Ubuntu and Qt creator keyboard layout change problem

When I run Qt Creator on my Ubuntu 14.04 with English layout, it always types in English and it won't change if I change my layout to other language. In front, when I run Qt Creator with Persian ...
3
votes
0answers
121 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 ...
3
votes
0answers
197 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 ...
3
votes
0answers
102 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 ...
2
votes
0answers
41 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 ...
2
votes
0answers
616 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 ...
2
votes
0answers
165 views

Issue in QT 5.2.1 app in linking libquazip.so library during making .deb package for ubuntu 14.04

I am making .deb package for the QT 5 .2.1 desktop app for ubuntu 14.04 64 bit. I have installed QT 5.2.1 on Ubuntu 14.04 and made a demo app for the testing purpose in which I have used quazip ...
2
votes
0answers
356 views

After compiling QT 5 how do I to update my system? With update-alternatives?

I'm on Ubuntu 12.04. I followed the instructions in this guide in order to compile QT5. Everything compiled fine. My problem now is that my QT related programs are still pointing to an older ...
2
votes
0answers
515 views

Qt 5.1.1 installation problem

I am new to ubuntu and using 12.04 LTS. I tried to install Qt5.1.1 without software manager. I downloaded the qt-linux-opensource-5.1.1-x86-offline.run file and ran it. It ran smoothly and got a ...
2
votes
0answers
156 views

Ubuntu Phone App Development Clarification

I attempting to follow the Ubuntu Phone App development tutorial to make a Currency Converter, and I am simply unable to complete the tutorial. I have installed all of the latest QT/Phone related ...
1
vote
0answers
54 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, ...
1
vote
0answers
78 views

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 ...
1
vote
0answers
538 views

How to deploy my Qt app statically on ubuntu ? It is running on ubuntu 14.04 only

I wrote a application with Qt 5.x and the compiled binary is only working on my development machine running 14.04 on other machines running 14.04 on linux mint 16 I already inserted the CONFIG ...
1
vote
0answers
343 views

Ubuntu 14.04 and Qt5: No QMenu objects show up!

I have installed the Qt5 packages from the Ubuntu (14.04) official repository: sudo apt-get install qt5-default qttools5-dev-tools appmenu-qt5 Then I found this critical bug: QMenu objects don't ...
1
vote
0answers
30 views

Use SystemSettings 1.0?

I'm developing a new app that I need to use the SystemSettings module for (I need to get the device serial, IMEI and stuff). When looking for a way to get these numbers I came across Ubuntu System ...
1
vote
0answers
1k views

How to configure debian/rules file for packaging with CDBS and Cmake, Qt5 on Ubuntu 12.04

this is the first time I ask here. Recently I played packaging --a new thing for me-- in Launchpad. I tried compiling Sigil 0.7.4 for Ubuntu Precise. The source code had to be compiled with Qt5, while ...
1
vote
0answers
185 views

Qt 5.1 packages

Is there any ppa containing Qt 5.1 prebuilt binary packages? I found this one, but it doesn't seem really well-provided. I'm running Raring, but I see that even Saucy still has Qt 5.0.2.
1
vote
0answers
747 views

Problem during Qt 5.1 installation

I downloaded the Qt 5.1.0 installation file for Linux, and trying to install gives me an error. It stops when copying these files: ...
0
votes
0answers
14 views

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 ...
0
votes
0answers
32 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 ...
0
votes
0answers
32 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 ...
0
votes
0answers
39 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: ...
0
votes
0answers
111 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 ...
0
votes
0answers
56 views

Error in Installation of Qt5.x 32 bit on Ubuntu 12.04 64 bit

I want to install Qt5.x on Ubuntu 12.04 64 bit. But while installation I faced the problem of libsm6 missing. I learned Ubuntu needs 32 bit libraries for functioning. I followed this link and tried to ...
0
votes
0answers
104 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. ...
0
votes
0answers
143 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 ...
0
votes
0answers
302 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 ...
0
votes
0answers
90 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 ...
0
votes
0answers
75 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' ...
0
votes
0answers
105 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: ...
0
votes
0answers
140 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 ...
0
votes
0answers
187 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 ...
0
votes
0answers
54 views

How to connect a Button to FileDialog function in ubuntu sdk?

I've just started to deploy my first application for Ubuntu using QtCreator 3.1.1 based on Qt5.2.1 on Ubuntu 14.10.. I need to open some video files, so I'm going to put a Button to choose file ...