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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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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How to stop Unity on the phone so it doesn't restart?

How to bring down the Ubuntu Phone GUI so I can test some Qt stuff? I figured that it's easy to put arbitrary Qt versions into home dir and run them without messing with the main installation. But I ...
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How to integrate the design of Qt software such as FocusWriter, Telegram, or RStudio?

What is required to integrate Qt applications such as FocusWriter, RStudio, or Telegram Desktop into the default GTK environment? Without having changed anything, those applications look as follows: ...
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17 views

Build ubuntu system QT4

I'd like reproduce the building of system QT4 libraries in Ubuntu (12.04 or 14.04) that are generally located in /usr/lib/x86_64/. I assume that for this I need the QT4 source (which I probably can ...
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1answer
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Install Qt in NetBeans

Someone can help me find a guide to install Qt Framework in NetBeans 8.0.2? OS: Ubuntu 15.04 (64-bit) If it can be a guide for beginners, better for me.
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Unable to compile 32 bit Qt 4.8.6 libraries on 64 bit machine

I am trying to build 32 bit Qt 4.8.6 libraries on Ubuntu 14.04. I have installed additional libraries sudo apt-get install libx32gcc-4.8-dev sudo apt-get install libc6-dev-i386 sudo apt-get install ...
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35 views

QT gui application not starting automatically on startup in ubuntu 14.04

I have two Qt applications, one is non gui called "App1" and another one is gui called "App2". As per my need I need to start "App1" on startup of Ubuntu 14.04 machine. This "App1" runs a sh file ...
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Ubuntu 15.04| Netbeans failing to start qtcreator

when in clicking on .ui files Netbeans wont open qtcreator as shown in this tutorial: https://netbeans.org/kb/74/cnd/qt-applications.html?print=yes what i've done: Installed Netbeans and Set it up ...
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21 views

How to make the application taskbar icon identical to the application file icon?

I would like to associate a custom icon with our (Qt) application. We ship the application as stand-alone: that is to say all non-system libraries are part of the software package. We need to set ...
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59 views

Really installing PyQt4/5 for python 3.4 on trusty

I am using Python 3 on my ubuntu 14.04.2 (trusty), along with Python 2. I am trying to run ipython --pylab, but with Python 3, this fails (works well with Python 2). It fails since it needs QT4/5 or ...
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27 views

Building sni-qt from source not depending on system QT

I'm building sni-qt plugin from sources (downloaded from here, but I'd like to have the final libsni-qt.so linked not against the /usr/lib/ QT4 libraries, but against QT4 libraries that I have also ...
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1answer
14 views

Linked Files in LD_LIBRARY_PATH statement not working

Is there some magic to ensure that Link files work when part of a PATH statement? I have an app that is looking for /opt/Qt/5/gcc_64/lib/libXmlPatterns.so.5 The above file is a link to a file in ...
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79 views

Trouble with Qt libraries while installing Gnu Octave 4.0.0 from source

I know that similar problems to this have arisen. I have tried all of the debugging techniques that I have heard of. I have made sure to download all of the dependencies for Qt4 from the following ...
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Windows that start out maximized restore to an application-specific size, not always a good one

I don't know that this is an OS-specific thing, a bug in the various UI toolkits in use, or purely application-specific, but the inconsistency is mildly infuriating - enough, at least, to get me to ...
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22 views

Problem using qmake with Qt3Support

I am using Ubuntu 14.04.2 LTS on an x86_64 cpu. I try to create a Makefile using qmake with the flag QT += Qt3Support, but I get the answer "Project ERROR: Unknown module(s) in QT: Qt3Support" I ...
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1answer
56 views

Building a windows executable in qt on a Linux system

I have been having the hardest time trying to compile a .pro file in Linux to make a windows executable. I have read all the links in the world on using mingw and nothing has worked as of yet. Is ...
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24 views

Ubuntu SDK Design

OK, so i have a question, i don't know if it's me or others, but i would like to know when or is the design mode going to be fixed?? "import Ubuntu.Components 1.1" for example. I tried, the ...
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1answer
29 views

QT version update

I'm running Ubuntu 12.04 and I've noticed that the system Qt libraries in /usr/lib/... have the version 4.8.1. Now this version of Qt is quite old and many important updates and bugfixes have been ...
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98 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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14 views

How can I specify a Qmake file during packaging?

I'm trying to package a piece of software that I wrote for Debian/Ubuntu. I've read that dh supports Qmake natively. However, my .pro file is not in the root directory of the source tree, but rather ...
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12 views

ddc card with Qt

Does anybody knows about ddc device working in Qt5, which is used in avionics with 1553 communication. I tried to access the DDC(data device corporation)device for 1553 mil-std communication in Qt to ...
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What is the correct way of using Qt 5.4 in my .deb package?

I want to create a .deb package for an application that I am working on, which depends on Qt >= 5.4 For some supported versions of Ubuntu this version is not available except via packages from a ppa. ...
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1answer
42 views

Cannot start Qt Creator after updating to 15.04

My Qt Creator (from ubuntu-sdk) won't start after updating to 15.04. It gives this dialog after the window has opened: [3]+ Segmentation fault (core dumped) qtcreator Also I don't ...
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73 views

Could NOT find Qt4: Found unsuitable version “4.8.1” BUT i have version 5 installed?

I'm new to Ubuntu, and trying to run cmake. When I run the command: cmake ../src I get: CMake Error at /usr/local/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:108 (message): ...
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23 views

How to build Qt from source with not default version of gcc compiler?

P.S. The problem is solved. It has nothing to do with Ubuntu particularly, of course. One needs to manipulate with paths to gcc versions using "update-alternatives" command ...
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1answer
60 views

QtWebSockets not available on Ubuntu Touch

I'm developing an Ubuntu Touch application which communicates with a server using WebSockets. Qt offers its own API since version 5.3, which can be used from a QML file by adding import QtWebSockets ...
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1answer
39 views

Qt Creator fails in designer tab

Qt Creator in designer tab displays black frames. At the same time in Konsole I have the following message several times (more than 30 times): QQuickWidget cannot be used as a native child widget. ...
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1answer
30 views

Cannot detect if a MouseArea is over a GridView item

This question is not specific for the Ubuntu platform, but as I am developing an Ubuntu Touch app, I'd like to ask first here. I have a list of UbuntuShapes arranged in a GridView - generated from a ...
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64 views

Serial port blocked. How can I detect what it is?

I am using Qt (QSerialPort) to handle the port. At startup, I am attempting to open the port every second. It takes in average 12 cycles not to get back an error, which is: ...
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17 views

Running QLandkarte GT on 1024x600 resolution

When I start QLandkarte I found that it has no maximize/minimize/close buttons on right window corner and it fits uncomfortable in 1024x600 resolution screen. QLandkarte window don't fill screan width ...
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26 views

How to get and install qt header and libraries in specific folder?

Where do I get qt header and libraries from? And then how do I install qt header and libraries in specific folder?
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1answer
47 views

Cannot execute QT console program in ubuntu [duplicate]

An error occurred. Starting /media/milo/DATA1/Milo/C++/build-test-Desktop-Debug/test... Cannot execute '/media/milo/DATA1/Milo/C++/build-test-Desktop-Debug/test': Permission denied ...
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15 views

Problem compiling with QT4 libraries in pbuilder

I am having trouble getting pbuilder or launchpad to build a package that uses the QT4 libraries. The build script that I am using is below ( I didn't write it ). It compiles fine on a vanilla ...
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1answer
130 views

Use g++-4.8 with Qt

I am trying to compile a Qt project that uses the "override" keyword, and thus needs GCC 4.8. I have installed GCC 4.8 on my Ubuntu 12.04 machine already, and it lives in /usr/bin as gcc-4.8 and ...
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1answer
65 views

Ubuntu 15.04: Change KDE application's icons

is there a way to change the icon theme that is used by KDE applications like Krusader in Unity? KDE systemsettings don't work any more. Can't I just edit some file? Thanks
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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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53 views

Adding qt4 and qt5 to global path

I have downloaded a source code from github. It is using qt and in many files it has the following headers included: #include <QApplication> #include <QApplication> #include ...
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Focus Writer 1.4.4 has an error when I type in Korean

$ focuswriter QGtkStyle was unable to detect the current GTK+ theme. QString::arg: Argument missing: "문단: % L1" , 0 QString::arg: Argument missing: "문단: % L1" , 0 QString::arg: Argument missing: "문단: ...
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245 views

Unity desktop on Raspberry Pi 2

The first thing needed to make it work is a driver. There was a Mesa and DRM driver for Broadcom VC4 developed recently by Eric Anholt. It's an OpenGL driver. http://dri.freedesktop.org/wiki/VC4/ ...
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1answer
16 views

CoverFlow app for Screenshots

Does anyone remember how the tiny little KDE/QT tool to create stylish (reminiscent of iTunes' CoverFlow effect) screenshots with reflections? One could select some screenshots (or other pictures) and ...
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Virtual box crashes with undefined symbol

When executing Virtual Box through GUI doesn't pop up anything using terminal it crashed with error: root@mayur-laptop:/home/mayur/Documents/MyOs# virtualbox VirtualBox: ...
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2answers
50 views

File access outside application directory

I want to know is it possible to access files outside the application directory? e.g. /home/phablet, /media, etc. Okay, so precisely I want to use QDir and QFile to read the folders and the files ...
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1answer
58 views

disable automaic update for texmaker [duplicate]

I'm new to Ubuntu 15.04 and I experienced problems with Temaker, namely the keyboard shortcuts did not work after some time. However, manually installing the version compiled with Qt4 fixed the ...
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143 views

KDE/QT applications on Xubuntu 15.04 are horrible

All installed KDE/QT applications on Xubuntu 15.04 are horrible (clementine, digikam, etc...). I think the layout miss all kde/qt library. See there http://postimg.org/image/ng087lkkb/ Why? How can ...
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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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1answer
22 views

How to add packages installed manually to the system's package database?

I installed QT Creator by off-line installer in Ubuntu 14.04 and now i want to install Ubuntu SDK but it still lists QT Creator as software that need to be installed in the system. Ubuntu Software ...
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201 views

How to make Qt apps use GTK+ style in Xubuntu 15.04?

I'm using Ubuntu 15.04 right now, and Qt apps like qBittorrent and Clementine looks like they were GTK+ apps, they use the systems icons and style. But I installed Xubuntu in another PC and doesn't ...
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ubuntu licence for commercial apps

I want to submit a commercial application in ubuntu software center... in publish process there is a part that ask licence file (list of numbers) First, what is the syntax of this file? Second, how ...
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1answer
71 views

Ubuntu Phone - detect system type Desktop or Mobile

Is there a way to detect platform from QML or Qt C++ classes? I have Qt/QML project supplied to Linux/Android/Windows at one time, I see it's possible to deploy it to Ubuntu Phone. Is there a way to ...
2
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1answer
328 views

How to install PyQt for python3 in ubunt 14.10?

I found some tutorials online for earlier versions of Ubuntu but they didn't seem to work on Ubuntu 14.10, either that or I was doing it the wrong way, I want to use QtDesigner to design a GUI, use ...