Qt is an application framework originally created by Trolltech and currently managed by Digia. The KDE desktop uses the Qt framework for its applications.

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Unity launcher, dash and menu fonts are not anti-aliased

I am running Ubuntu 14.04. After installing Qt4 settings manager and tinkering with it (changing the font face for Qt apps) I notice that unity launcher, dash and menu and date indicator fonts are not ...
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157 views

Multitouch in Qt

I've got a fresh install of Kubuntu 14.04 and Qt Creator/5.2.1, and I'm trying to get multi-touch working for the example applications like photosurface. My input device is an Acer T272HL 10 point ...
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162 views

Puzzle Game QML GridView Animation Problems

I've been working on a puzzle game for Ubuntu Touch and I'm facing some issues with animations. The problem seems to occurs when GridView animations (add, move, remove...) play too fast. Something ...
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210 views

Develop in C/C++ for Qt Ubuntu Touch projects

as said in the question I want to develop the code in C or C++ for my Ubuntu apps. I don't feel confortable in Javascript at all, and when I try to create a C or C++ file the IDE returns me Failed ...
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208 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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413 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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522 views

Amarok doesn't start after qt4-related ubuntu updates (from raring-updates)

Last Monday I updated my Ubuntu 13.04 and there were a bunch of qt4 related updates. (I don't know how to have a list of the updated packages which isn't taking a screenshot of Ubuntu Software Center ...
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171 views

PySide application lost icons when upgraded to Ubuntu 13.04

I'm developing an application in Python 3 using PySide. I upgraded my system form 12.10 to 13.04 today, and now I no longer have icons in my toolbar. The icons are loaded using QIcon.fromTheme(). Does ...
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956 views

When I install Xubuntu 12.04, the Qt-applications font is horrible

What is the proper way to set up fonts in Skype, VLC, and so on?
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32 views

run qt designer/qt assistant with commands designer/assitant respectively

I'm used to an environment where I run the qt designer/qt assistant simply typing designer/assitant in the terminal. I am talking about qt 4. I've been installing packages such as qtcreator and ...
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19 views

Qml HUD integration without MainView?

I'm working on an app with Qt Quick Components, I don't want to use any Ubuntu specific components because I want the desktop version of my app to be more portable than that (Qt 5.2 is enough of a ...
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102 views

Qt4 interface not working for VLC

This is what happens if I try to run VLC: main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. main interface error: option qt-volume-complete does not exist ...
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29 views

What are the steps needed to implement a Qt class or member function into a QML project for Ubuntu-Touch?

Qt contains many classes and functions that are useful for a QML project, but not readily available. The existing solutions do not employ a method that is platform independent, thus it is unclear ...
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19 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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36 views

Cannot import directory path to qmlscene

I am trying to import directory in QML as explained, here: http://qt-project.org/doc/qt-5.0/qtqml/qtqml-syntax-directoryimports.html. I have the following ubuntu-app | - extras1 | - extras2 | - ...
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38 views

QT 4 update, removing lots of libs

I get a message from Muon update module aksing to update QT 4. Thats fine, but it also want to remove LOTS of libs and programs (incl spotify, ksystemlog, krdc, krfb, kdepim-runtim, userconfig and ...
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44 views

Way to catch shutdown event in Unity, Ubuntu 13.04

I'm developing gui application (C++/Qt) and now search for correct(documented) termination way for application. Is there any documentation how Unity DE notifies gui applications to exit (some analog ...
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62 views

Setup compilation with Qt, Boost and muParser

I am a new comer on the Ubuntu worldwide and I have to complete a project. I have developed a plugin for LibreCAD with Windows. I am now working with Ubuntu 13.10 and I would like to compile LibreCAD ...
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87 views

Add custom button with Gtk or Qt on ubuntu login screen

i'm currently working on custom ubuntu distro for local use only. I need to create a custom button on ubuntu login screen. I don't know where to start, how to edit ubuntu login screen? the button, for ...
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47 views

Behavior on listView

I need to scroll an element of a ListView to bottom when user clicks on it, with an animation. I want to use Behavior for the animation, but I do something wrong. I have no problem with the scroll ...
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932 views

Missing compiler error in QtCreator and Qt5.1.0 on Lubuntu 13.04

I can't compile any program in QtCreator on Lubuntu 13.04. I have this error: QtCreator needs a compiler set up to build. Configure a compiler in the kit options First of all, I installed from ...
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148 views

qt5 not working

I'm trying to get Qt5 working on Ubuntu 12.04. I downloaded the 32-bit installer from http://qt-project.org/downloads and basically just let it install everything in my home folder. I had to add ...
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160 views

Recompile Qt Creator with Qt4

Qt Creator on Ubuntu 13.04 has the cursor theme wrong. I've read this is because Qt5 applications do not integrate in Ubuntu well. So I want to recompile Qt Creator using Qt4. I've downloaded the ...
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611 views

Setting Qt5 qmake as default Qt builder

By default Qt4 is the default Qt builder in ubuntu 12.10, I want to know how can I make Qt5 qmake as default Qt builder. PS Qt5 qmake installed in /usr/lib/x86_64-linux-gnu/qt5/bin/qmake
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134 views

Compose Key combinations are wrong in KDE/QT apps

On Kubuntu 12.04 LTS. For some reason, Qt applications (Kate, Konsole, etc.) were loading the ISO8859-1 Compose key file, instead of UTF-8. Other applications (Chrome and Java apps, for example) were ...
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586 views

Qt5 font rendering in Ubuntu 13.04

My fonts in general within QtCreator inside Ubuntu 13.04 looks 'ugly' when compared to how they looked in 12.10. 12.10 still used Qt4, so did something regarding the font rendering in Qt5 and the ...
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100 views

Inner object properties are not shown in Qt Creator in debugging mode

I'm using Qt Creator 2.6.82 on Ubuntu 12.10. I wanted to figure out if some properties are correctly set, but I can't see them. This is the deepest I can get (I can't even open the QObject node) ...
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156 views

IPython qtconsole not launching, Ubuntu 12.04

When I try launch Ipython qtconsole from terminal, I get the following error: python: /build/buildd/sip4-4.13.2/siplib/siplib.c:7915: sip_api_can_convert_to_type: Assertion `(((td)->td_flags & ...
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2k views

Not finding QT4 QWidget after update

Updated from buntu 11.0 to 12.04. I use to have QT4 ver 4.7.4, now I have 4.8.1. My project is failing to build because it can't find #include <QWidget>. A search of the disk tells me there is ...
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291 views

Wii remote set up not working with Clementine on Ubuntu 12.10

I have tried to follow this link to set up a wiimote to work with clementine and control the music, but i have reached an impasse. When i try to run cmake . -DDISTRO=ubuntu ...
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29 views

excel query in qt

I have a program to connect with excel file. my excel file contains usernames and passwords of users who has access Permission to application. in interface of the program i have two QlineEdit(one for ...
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19 views

Qt C++ windowMinimized no reaction on Ubuntu

Heloo all! Me and a friend are creating an app for linux, everyting works but the custom minimize button doesnt whant to work on Ubunutu 14.04, there is no reaction when presed clicked an so on. Any ...
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19 views

How do you change qt themes by hand?

I am running a light desktop with Fluxbox and trying not to install anything more than I absolutely have to. I was wondering how one would go about changing qt4 and qt5 themes by hand much like you ...
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19 views

QML: TextField horizontalAlignment not working for entered text in Ubuntu SDK

I'm a complete newbie to QML and QT, forgive me if this is a trivial question. I'm using the following code to center-align the text in a TextField. This does work for the placeholder text, but the ...
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17 views

cannot find -lQtMultimedia

Using QtCreator with Qt 4.8 I need QT += multimedia in my pro.file I have already installed qtmobility-dev. Still my multimedia package is not found. Why?
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55 views

How to install Qt4.6 libraries on Ubuntu 12.04?

I use Ubuntu 12.04. I am working with Qt IDE. I need Qt4.6 libraries for supporting my applications. Instead of this Ubuntu 12.04 provide Qt Creator IDE based on Qt4.8.0 libraries by ...
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56 views

Systray not showing

I have an application called foo that runs as root. The foo calls system function to execute the other application which show tray icon using Qt. The Systray Icon Example in Qt is working properly ...
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46 views

How to fix no sound problem after startx in alsa sound driver

My development env is: OS: ubuntu 12.04.3 language: Qt 4.8.1 alsamixer ver: v1.0.25 I am using .xinitrc contents like this: alsactl restore rm -rf /tmp/.* clear while(true) do ~ => ...
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45 views

unable to run make during installation of kernel 3.3.6

desktop:~/Desktop/linux-3.3.6$ make xconfig make[1]: Warning: File `scripts/kconfig/.zconf.tab.o.cmd' has modification time 1.7e+04 s in the future CHECK qt * Unable to find the QT4 tool qmake. ...
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29 views

Broken qt4 package and system cannot be upgraded

While trying to fix the 100% /boot partition full, the "qt4" package was inadvertently broken. Now when I try to fix Broken packages with "Synaptic package Manager", I get the error below: Is there ...
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235 views

Ubuntu 14.04 and 13.10 trouble installing apps

Hi have started using Ubuntu 13.10 about a month ago first time user, like it very much after playing around with different softwares like Draftsight, qt sdk virtualbox each one of these where ...
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153 views

Using KDE - Application Menus Missing in Qt Apps

I have multiple desktop environments installed on my Ubuntu 14.04 installation, and am primarily using KDE (today). Here's the problem I've noticed. When I've been building some newer versions of ...
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31 views

Import libraries in Ubuntu SDK

I am very new to QML, Qt and the like. I want to add a library (e.g. http://sourceforge.net/p/qzxing/wiki/Home/) for a "Ubuntu -> Simple UI" project. However, I cannot figure out how. The instructions ...
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61 views

How do I fix X problem to invoke Cadence IC6.10 in Ubuntu 13.10

I installed Cadence IC6.10 in my Ubuntu 13.10. When I tried to invoke the Cadence, I got the following error message: ============================================================= Qt Warning: X ...
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70 views

Cant install unixodbc-gui-qt_2.3.0 on Ubuntu 13.10, complains “cannot find Qt!”

I am on Ubuntu 13.10 and I am attempting to install UnixODBC GUI, the instructions look straight forward. When I run ./configure I get an err "configure: error: cannot find Qt!". I have installed ...
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88 views

qDebug() output is not visible on a terminal

I use UBuntu 12.04 LTS. When I run a console application using Qt Creator an output of qDebug() is not visible on a terminal (I get only an empty terminal with a cursor). How to fix that ?
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35 views

Why does Qt Creator automatically exit randomly after about 5 minutes?

I’m running Ubuntu 13.10 and have upgraded Qt4 to Qt5. While using Qt Creator 2.7 I’m facing two problems at this time. When I run Qt it only stays open for about five minutes or so. Also when you ...
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35 views

Which files should I look at when changing Ubiquity?

I've been thinking about changing the Qt version of Ubiquity to make it easier to use ("easier" in this case meaning not to bring the user to a partition manager when choosing a dual boot option). ...
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356 views

Looking for a GUI for Postfix/Dovecot

Ok, to be clear, I am not interested in web based GUIs. What I'm making is something similar to the server administrator on Windows, which is just a sort of control panel with the ability to install ...
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2k views

Qt (headers and libraries) not found

I'm trying to install a program and i used the following command: ./configure But, an error occurred: checking for Qt... configure: error: Qt (>= Qt 3.2) (headers and libraries) not found. ...