Qt is an application and UI framework. The K Desktop Environment is based on QT.

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Chromium - Enabling Widevine Content Decryption Module

I am trying to enable Widevine inside Chromium in order to play video from source like Netflix. Recompiling Chromium is not really an option since I use Qt new browser that uses Chromium. I'm trying ...
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27 views

Xvfb differences on Ubuntu and CentOS

I have an html screen capture utility built using Qt that uses WebKit. It basically takes html as input and produces a screen capture as a png. On Ubuntu desktop 12.04 the capture quality is ...
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54 views

Command “>” failing in Embedded Linux only

I'm developing an app in Qt for Embedded Linux where I want to see how much (%) of the given partition is occupied. I found on the web that a way to do this would be by calling the df command passing ...
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How to change the Qt version used by TeXstudio in elementary os Freya?

I have installed TexStudio 2.8.8. When I open it, it says TeXStudio has been compiled with Qt 4.8.6 but running with Qt 4.7.3. Please get the correct runtime library. when I checked in terminal with ...
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10 views

0 Active connection while Downloading Blockchain?

I am not able to connect to download blockchain in logoscoin. It shows O active connection, I am also attach debug logs below: 2015-01-24 06:18:15 Logos version v0.8.6.4-ga5aedeb-beta (2015-01-22 ...
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34 views

assertion Failed error while running Bitcoin-Qt application?

I have downloaded Bitcoin-qt project from GitHub for Ubuntu 14.04, But I don't know why I'm getting error: Error: /main.cpp:2985: bool InitBlockIndex(): Assertion `block.hashMerkleRoot == ...
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26 views

Print to Qtopia Terminal

I'm trying to print hello to the Qtopia (2.2.0) Terminal using a program.desktop file program.desktop: [Translation] File=QtopiaApplications Context=program Comment[Desktop Entry/Name]=Use soft ...
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34 views

Run Qt Widget program on VPS with Xorg running over VNC

I want to start simple Qt program on my remote VPS. So I installed Xorg, BlackBox and x11vnc. It works good and I can connect to the server with VNC client. I see grey screen and if I run xterm & ...
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19 views

Trouble with installing libqca2-dev on ubuntu 12.04

I have installed Qt 4.8.4 from source at usr/local/Trolltec and now that I am trying to install libqca2-dev on Ubuntu 12.04, the apt-get tool fails with a dependency error stating that libqt4-dev is ...
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37 views

Dead key not working with konsole, yakuake

After setxkbmap fr, dead keys do not work under konsole and yakuake (typing the dead key ^ immediately prints a ^, rather than wait for the next character), while they work in xterm. The font I'm ...
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1answer
63 views

Yum claims library is installed but it is not

I'm trying to compile a program using cmake which has a dependency on libQtWebKit_debug.so. According to yum provides, that library is supposed to be in /usr/lib64/ but it is not there: yum provides ...
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270 views

Qt5 applications don't use gtk style on Liux Mint

Qt4 applications use the gtk theme by default, but Qt5 applications need to be started using -style gtk, or they don't look like gtk applications. Is there a way to make Qt5 applications use the gtk ...
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34 views

Is there a way to disable mouse scrolling on a combobox in GTK/Gnome and Qt/KDE?

I'm scrolling a window content and it happens the mouse pointer place over a combo box and it begins to scroll its content. This is annoying. I experienced it in KDE and Gnome and I'm wondering is ...
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1answer
147 views

QT and Swing not acceptin the cursor theme of GNOME 3.14

I switched from Ubuntu 14.04 with Unity to OpenSuse 13.2 with GNOME 3.14 desktop. The problem is when I change the cursor theme, GTK and Java SWT apps accepts the new theme while Java Swing and QT ...
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63 views

Streaming Qt over ssh

I am trying to stream a program over ssh and it doesn't work. It is written in qml and I've already compiled it, but qmlscene doesn't work either (doesn't matter what file). The error I'm getting is ...
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1answer
34 views

How to edit Qt4 source and make changes apply

Sorry for noobish question, I have never done this before. Basically, I have a change to be done in /usr/src/qt/src/src/gui/kernel/qclipboard_x11.cpp There is a 10s timeout that causes apps to ...
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23 views

Qt 4 designer, I want more than KPlotWidget

In my Widget box, there is only the KPlotWidget. How could I add a MatplotlibWidget? I am running Ubuntu 14.
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69 views

Behavior of ALT in Qt5 applications

I work in Arch Linux 64bit with both English and Hebrew keyboard layouts available, using Alt+Shift to change between them. I recently noticed that when I work in Texmaker, which is a Qt5 ...
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2answers
707 views

How do I install this script as root in terminal: ./qt-opensource-linux-x64-5.3.2.run?

I need to install qt5 on my system and I can only run it as the normal user. When I try to run it as the "super user" I get this error: root ~ # ./qt-opensource-linux-x64-5.3.2.run No protocol ...
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1answer
28 views

What are the files in /tmp that start with “qipc”?

There are empty files like this in my /tmp directory: qipc_sharedmemory_soliddiskinfomemac5ffa537fd8798875c98e190df289da7e047c05 ...
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1answer
83 views

Qt program not invoked by cron

I had a simple Qt program, when running, it shows a simple window with a countdown timer. If you might be interested in the code, please see here. I had crontab line * * * * * ...
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1answer
278 views

Start QT Application on bootup on an Embedded Linux Device (Beaglebone Black)

Below is picture of the display on bootup. Expected display is overwritten by Angstrom screen Expected Display Application is been started as a service. Below is the content of the service file ...
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1answer
211 views

ld cannot find -lQt5Multimedia

I'm trying to build BBQScreen for Linux. During the make process, I get the following error: g++ -m64 -o Linux/BBQScreenClient2 debug/main.o debug/mainwindow.o debug/screenform.o ...
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176 views

Unable to create gui in Qt creator

Till now I was creating GUI on windows using c++ on visual studio, now I decided to move on linux. So I install Qt creator from here . Now I follow a video tutorial for creating gui application with ...
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133 views

Qt Application Disobeying Xmodmap

A long while ago, I created a ~/.Xmodmap reversing the 4 and 5 to create "natural scrolling": pointer = 1 2 3 5 4 7 6 8 9 10 11 12 I source .Xmodmap in .xinitrc in the standard fashion (xmodmap ...
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1answer
696 views

Ubuntu Qmake is not an executable

after installing new version of QtCreator in Ubuntu and tux-world@alachiq:~ > sudo apt-get install qt5-qmake build-essential g++ gcc Reading package lists... Done Building dependency tree ...
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76 views

Plasmoid - connect KDE signal with QML UI

I'm working on this small KDE plasmoid and I really like the QtQuick/QML, but now I have this requirement. I need to do an action when a window is shown or closed in KDE. KDE API have signals for ...
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1answer
464 views

chrome ui issues with mint 17

I did install Mint 17 (Qiana) today and I seem to have problems with the window title bars such as chromium title bar. I have limited knowledge of tool kits such as qt or gtk. From what I read so ...
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190 views

qtcreator debugger shows <unavailable synchronous data> when trying to view the contents of std::map

I'm running QtCreator 4.8.0 on a Ubuntu 12.04 (64bit) machine. apt-cache policy qtcreator shows: qtcreator: Installed: 2.4.1-0ubuntu2 Candidate: 2.4.1-0ubuntu2 Version table: *** ...
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2answers
344 views

Qt applications have tiny fonts on XFCE

My question is almost the same as this one but the answer did not work for me. I'm running OpenSuse 13.1 with XFCE desktop. I have set ~/.kde4/share/config/kcmfonts with forceFontDPI=0 but it didnt ...
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What is difference between GTK and QT applications?

Many packages available with GTK and QT versions. So, What is difference between them? Is there any difference in performance or working method?
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4k views

qtconfig tool for Qt 5?

I've just installed QT 5 in Arch Linux, but only qtconfig doesn't work: %> qtconfig qtconfig: could not exec '/usr/lib/qt/bin/qtconfig': No such file or directory Yes, there's no such file, not ...
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1answer
35 views

How to access GNOME header in Qt project

I'm working on developing a Qt/C++ application for Linux distros which has a module which deals with icon overlays. I need icon overlays exactly like in svn or dropbox. First I'm starting with GNOME ...
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463 views

How do I set default font for all Qt5 applications?

In Qt4, there used to be a tool called qtconfig that allowed you to set the fonts and other stuff. It also picked up the settings from KDE4's control panel. I'm working with Qt5 now (binary ...
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1answer
4k views

How do I change which version of Qt is used for qmake?

I feel like there should be a simple way of doing this, but my googlefu is failing so I'd really appreciate some info on how to switch (or even permanently change) which version of Qt is used when ...
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65 views

Is there a QT4 equivalent of gksu, not dependent on KDE libraries?

Is there a QT4 application with the same functionality as sudo to gksu that does not require an entire KDE desktop to be installed?
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98 views

How do I get a Qt app running on MATE to open embedded URLs?

I'm running Linux Mint with the MATE desktop. I'm using Everpad, which is a Python app that uses Qt. When I click on an http URL in the text, nothing happens. I assume this is because Qt doesn't have ...
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1answer
65 views

Why does Debian under-report the space available when installing Qt?

I want to install Qt on my Debian but it doesn't detect the whole free space! I tried to install it in /home/Qt but it says that only 23.87 MiB of space is available while df -h says that there is ...
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1answer
875 views

Archlinux & openbox - greyish win 95 applications

I have just installed Archlinux & openbox but i have to say i am a bit dissapointed that the applications have this dull greyish (win 95) look: On the picture there are two programs open which ...
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420 views

Test automation tools for desktop application

Is there any GUI / functionality test automation tools for testing QT3 based GUI applications? I went through LDTP, dogtail, Squish, and Sikuli but all dependent on specific QT versions. Also, ...
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1answer
377 views

Buildroot OpenGL Capable Backend

I'm trying to configure QT 5 through buildroot and some options are not available with the message requires an OpenGL-capable backend. I'm using buildroot 2013.08-rc1 but the same message comes up ...
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1answer
183 views

How to compile LXDE on OpenIndiana - how to deal with those AM errors in lxde-common-qt?

OI is latest 151a7. Fresh install, total newbie, installed ss-dev, gcc-dev, sunstudio, a few other packages I thought were relevant based on what I read. Just want to compile LXDE from source because ...
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2answers
3k views

Starting Qt Application On Startup for Embedded Linux

I'm trying to get a Qt application to launch immediately after booting up. When booted, the Linux image does nothing more than launch an X server and a terminal. It also has the cron daemon running in ...
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2answers
737 views

GTK2, GTK3 or QT for LXDE optimized application

For developing an application optimized for LXDE, should you choose GTK2, GTK3 or QT? Most LXDE apps are currently using GTK2, but it looks like GTK2 is becoming dead and the LXDE developers are ...
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1answer
46 views

Is there an easy way to print the GTK and QT versions installed on a system?

Is there an easy way to print the GTK and QT versions installed on a system? I am wanting to make a script that will print the version numbers of various developer tools and libraries.
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212 views

How to know which Linux kernel versions Qt 4.7 supports

I'd like to develop Qt 4.7 based applications running on my arm-linux MCU. However, I'm not sure if this Qt 4.7 supports the following two things: my Linux 2.6.37 kernel my Ti3530-cortexA8 MCU. I ...
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1answer
46 views

What is this feature in Linux 'to highlight characters' with QT?

Recently I came across this site. It says, in Linux with QT, it is possible 'to highlight characters' by pressing ShiftCtrl {Left,Right} or Shift {Left,Right}. Could somebody please explain this ...
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194 views

Can't drag and drop in Qt Creator

I recently installed the system upgrades for my Ubuntu distro (12.10). Since the upgrades, I can't drag and drop items in Qt Creator. I found a solution that requires editing of xorg.conf. My system ...
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1answer
99 views

How can I alter the appearance of “Qt::IBeamCursor” in ReText?

I'm running Lubuntu 12.10, fully updated. I used apt-get to install ReText 3.1.4, a qt app, and the various recommends. I managed to get the page and font appearance to my liking by using Qt4 ...
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1answer
714 views

Qt based apps have unreadable, tiny font sizes

I'm running debian squeeze with Xfce 4.6. Today I logged onto my machine and all Qt-based apps have really tiny font sizes. I took a screenshot with Kile, skype 2.6, Kate and gedit for comparison: ...