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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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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2answers
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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
485 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?
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1answer
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Installing QT 5.5 On Ubuntu 14.04 LTS with error : QSslSocket: cannot resolve SSLv2_server_method

I've Downloaded qt-opensource-linux-x64-5.5.0-2.run file and tryed to install it using terminal, so I added execute permission and run it: ./qt-opensource-linux-x64-5.5.0-2.run But it shows: ...
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Ubuntu 14.04.3 qtbase5 dependencies problem, is this a bug?

I want to install qtbase5-dev, but this will delete many *-vivid packages. sudo apt-get install qtbase5-dev Reading package lists... Done Building dependency tree Reading state information... ...
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1answer
54 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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1answer
34 views

Unable to install qt5.5 from git in Kubuntu 14.04.3?

I tried to install qt5.5 from git and after doing the following git clone git://code.qt.io/qt/qt5.git -branch5.5 cd qt5 ./init-repostiory ./configure I am getting the following error: You ...
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1answer
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Ubuntu Qt 5.5.1: error Cannot find -lGL

I have developed an GUI application on Qt 5.3.1. I am using Qt Creator 3.1.2 (based on Qt 5.3.1) to build my GUI application and am able to build and deploy my application successfully. I wanted to ...
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1answer
423 views

Where is the Qt Maintenance Tool?

I've installed QtCreator in Kubuntu 15.10 through apt-get and it say my computer doesn't have the required Qt Kit and can be installed through Qt Maintenance Tool. But I don't think I have Qt ...
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1answer
288 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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416 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
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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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1answer
489 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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1answer
130 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 ...
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1answer
311 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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1answer
220 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 ...
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1answer
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Graphic driver error

When I run my Qt app I get the following error: libva info: VA-API version 0.35.0 libva info: va_getDriverName() returns 0 libva info: Trying to open /usr/lib/i386-linux-gnu/dri/vmwgfx_drv_video.so ...
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0answers
230 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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0answers
853 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 ...
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453 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 ...
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177 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 ...
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0answers
56 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
787 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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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 ...
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0answers
462 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 ...
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0answers
581 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 ...
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0answers
165 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 ...
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0answers
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libGL.so running Qt Application draw colored polygons

qt application I have fglrx installed on Ubuntu 14.04. Programs run fine. Steam games are working. But when I try to open a Qt-App, it draws this colored polygons instead of interface. This program ...
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39 views

Change QT5 theme

I am using i3wm on Ubuntu 15.10. I was wondering on how to change the QT5 theme? With old QT4 it was possible to change it with qt4-config. There is however no qt5-config as of yet. I have tried using ...
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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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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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199 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 ...
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281 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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694 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 ...
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403 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 ...
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35 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 ...
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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 ...
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0answers
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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.
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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: ...
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78 views

Qt Creator 3.5.1 running slowly in Ubuntu 14.04

I recently installed Qt Creator 3.5.1 on Ubuntu 14.04 LTS and it freezes for several seconds every once and a while (e.g., while editing text). Is this a known problem? How can I go about debugging ...
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25 views

Question mark at left side pane.Ubuntu compatibility

I had implemented an gui in Qt.I need the guidance for the below one... At present while running my project the application shows the default icon that is having question mark(?) symbol. How to set ...
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0answers
58 views

Missing images from Qt Creator examples

I installed in Qt creator (3.0.1 based on Qt 5.2.1) the examples by running sudo apt-get install qtbase5-examples qtbase5-doc-html The examples have been installed, but I can't see any images of ...
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446 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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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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408 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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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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149 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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154 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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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 ...