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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Errors installing capybara-webkit

I'm trying to install capybara-webkit, I've installed QT already, and purged + reinstalled qt and ruby after that didn't work. Building native extensions. This could take a while... ERROR: Error ...
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How to cross-compile a Qt package for armhf with sbuild?

I have a Qt application that I would like to cross-compile for armhf. I've set up an sbuild chroot using the following command: mk-sbuild --target armhf trusty However, when I run debuild -S and ...
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Error while trying install QT4 on Lubuntu 14.04.2

I'm trying to install QT4 on my laptop that has a new installation of Lubuntu 14.04.2 but I keep getting this error dpkg: error processing archive ...
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47 views

Could not find or load the Qt platform plugin “xcb”

I am getting this error when I tried to run APK Studio in my Ubuntu 14.10 This application failed to start because it could not find or load the Qt platform plugin "xcb". Available platform plugins ...
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39 views

Unable to re-install ubuntu-desktop, or fix the broken packages required to do so

I don't know how, but somewhere along the way the package ubuntu-desktop got uninstalled from my machine. I'm starting to notice little breakages all over my system now- I can't upload photos from ...
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32 views

Can I submit my non-free closed-source Qt application to Ubuntu Software Center without providing sources?

I don't want to provide sources of my application. Can I submit it as deb package or other way?
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48 views

Unmnet dependecies while installing libglu1-mesa-dev -y for Qt OpenGL support

I am trying to finish Qt installations steps but unfortunately when I try to install libglu1-mesa-dev -y I see following problem: majer@majerPC:~$ sudo apt-get install libglu1-mesa-dev -y Reading ...
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157 views

Qt creator: “cannot find -lGl” Cannot install libglu1-mesa-dev

I am trying to compile and run a QT program. I have already tried windows (couldn't get taglib to compile); I also tried OSX, I compiled but the program crashes even though it doesn't crash on my ...
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13 views

QT on ubuntu: can not find -lGL [duplicate]

I just installed QT creator from the offline installer. Created a new project and tried building the dummy code (it was supposed to work because itw orked in windows too with msvc installed) Anyway ...
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2answers
78 views

How does one get the ambient light conditions in Ubuntu Touch?

I am planning to make an app which would switch between Light and Dark theme based on the ambient light conditions. So if it was a dark room, then the app would switch to a dark theme to reduce the ...
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1answer
475 views

Qt Installation requirements: unmet dependencies [duplicate]

im a linux beginner and used google & Co. by installing the requirements ( http://doc.qt.io/qt-5/linux.html ) for Qt: sudo apt-get install build-essential libgl1-mesa-dev i get the following ...
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2answers
147 views

QT Creator wants me to remove many programs before I can install it via Ubuntu Software Center

I've just upgraded my Ubuntu-gnome version from 14.04 to 14.04.02 and somehow I lost my QT Creator software which I commonly use to do my coding. I decided to install it again. When I tried to ...
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1answer
34 views

How to enable global application menu in RStudio?

On Ubuntu 15.04 Unity, how can I enable the global menu bar for the Qt application RStudio? I found a 12.04 question, which was not solved and did not contain a clue. (Due to reputation issues, I ...
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35 views

KDE 4 Strange Problem

A problem with KDE is really driving me crazy, any help would be greatly appreciated. I have a xunbuntu 14.04 on which I installed kde-plasma-desktop. There are very few styles (System settings -> ...
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15 views

install qtmobility on ubuntu

I couldn't find any good link for downloading qt-mobility packages. and I also couldn't find any good installation guide for this. the most of the links are outdated. Thank you.
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1answer
191 views

How to install Dropbox on Kubuntu 14.10 with QT problems?

I am unable to install Dropbox on a fresh install of Kubuntu 14.10 (with the new Plasma desktop version). When I attempt to start the dropbox daemon using ~/.dropbox-dist/dropboxd I get an error ...
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2answers
89 views

No option for C++ in Qt Creator (for project)

I've installed the Qt 5.4.0 for Linux 64-bit (542 MB) on gnome ubuntu 14.04, When I started new project, I couldn't find the "Qt C++ Application" tab. There is option for C,QT,BLACKBERY....... But no ...
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1answer
256 views

Plotting with Matplotlib in Python 3 pylab: Tkinter and Qt FontManager errors

I'm trying to use pylab (i.e., $ ipython3 --pylab) in Python 3 on Ubuntu 14.04. I'm running into the same error regardless of whether I use the Tkinter or Qt4 backends. AttributeError: 'FontManager' ...
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1answer
304 views

qt can't find GL/gl.h but libGL.so exists

I am running 64 bit Ubuntu 14.04. The compile error I am getting is: In file included from ../../../Qt/5.4/gcc_64/include/QtOpenGL/qgl.h:39:0, from ...
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1answer
42 views

Is there Qt Creator documentation available in a ubuntu or debian package?

From QtCreator, aka the Ubuntu SDK, I can ordinarily access documentation for classes such as QString and all QObjects, however, I can not access the documentation for classes such as: ...
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14 views

PlayonLinux some issues of starting programmes

I am using the latest version of Ubuntu. Today I installed POL and wine. But while I try to install a program, I get the message: This application failed to start because it could not find or load ...
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180 views

Ubuntu 14.10 xrdp works, but Qt Creator doesn't

I'm running Ubuntu 14.10 x64 and xrdp works perfectly, I'm using the Xfce desktop by the way. Qt Creator works, but when I log in using xrdp Qt Creator doesn't open. So I tried running it from the ...
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30 views

How to build .deb package with ubuntu-sdk

How can i build a .deb package with ubuntu-sdk? I don't want to publish to the ubuntu software center, only need a .deb package for my Ubuntu-SDK/QT Creator project. Thanks
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1answer
167 views

Having trouble linking QML button to C++ class

First time using Ubuntu SDK and QML. I've spent the entire day attempting to figure this out but every solution that i came accross is either outdated or not well documented. I'm trying to figure out ...
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24 views

Can you use QProcess in a Click Packaged Application?

I am just curious whether this is something AppArmor allows or not? My application works fine on the desktop, but I can't get Standard output or error to even display in my app when I run it from the ...
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107 views

Installing android studio

When I tried to install android studio on my 14.04LTS ubuntu system on opt directory as according to mentioned on by clayton(ubuntu user) but I could not install it as accordingly. 1.unpack android ...
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40 views

How to run Qt app compiled&linked with Qt 4.8.4 on a system with integrated Qt 4.8.6

I wrote an application using Qt 4.8.4. Now I purchased a new PC and installed Kubuntu 14.10 based on Qt 4.8.6. To develop my application, I built Qt 4.8.4 from source using make install and that went ...
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1answer
79 views

VLC does not start in Ubuntu 14.04 because of Qt error

This is the error I get trying to open vlc VLC media player 2.1.4 Rincewind (revision 2.1.4-0-g2a072be) [0x9e37910] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without ...
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1answer
24 views

Problem while opening Qt

Cannot overwrite file /home/sauron/.config/QtProject/qtcreator/qtversion.xml: Permission denied. Why does this message show up everytime I open Qt?
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53 views

Why doesn't Transmission-qt use Oxygen theme in Kubuntu?

transmission-qt doesn't use oxygen theme on Kubuntu. The buttons are GTK style. How do I get Transmission to use Oxygen theme? Thanks.
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1answer
102 views

Where is the qt-mt (qt multithreaded) library on ubuntu 14.04?

I'm trying to install some software for a Mightex camera and the first step is to run a ./configure file, after getting a lot of messages where it checks for libraries it fails with the following: ...
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23 views

How to force use of “overflow menu” for actions on header bar?

I am using header actions in my Ubuntu SDK app, but I would like to avoid clutter on the header bar. I have noticed that the Android-style "overflow menu" autocreates itself after a certain number of ...
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36 views

Use the design function of Qt Creator when developing Ubuntu apps

I would like to start developing Ubuntu apps with Qt Creator and I have a few queries when making a simple qml qt app. Firstly, is it normal qml and javascript? Can I use all normal qml and ...
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174 views

qmake could not exec error while building Qt from source

I'm having an issue building QT from it's sources. I have to build from sources due to a strange requirement (that's how we are going to do it at work, once we start using QT). Building from sources I ...
2
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0answers
106 views

Font hinting problems in Dropbox, other Qt applications

I'm using Ubuntu 14.04 and font hinting works perfectly as usual, except for a couple of applications: Dropbox's preferences and Dwarf Therapist. Since they are both Qt apps, I figure that's where the ...
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46 views

Qt-wallets will not open after 14.04 upgrade?

Qt-wallets will not open from folders or terminal after 14.04 upgrade. when I attempt to launch from terminal it gives me as follows for the reason: error while loading shared libraries: ...
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1answer
60 views

Why does my QQuick application crash on Ubuntu 14.04?

Basically I have (The Game class just wraps QGuiApplication): int Game::run() { QQuickView * mMainView = new QQuickView; mMainView->setResizeMode(QQuickView::SizeRootObjectToView); ...
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102 views

How to change index in OptionSelector immediately (without animation)?

In my app, I use an OptionSelector to choose from a list of bike stations. I also have a map component with placemarkers for each station. When I tap a placemarker, it also changes the OptionSelector ...
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51 views

this qt-mt driving me crazy help

checking for Qt... configure: error: Qt (>= Qt 3.3 and < 4.0) (library qt-mt) not found. Please check your installation! For more details about this problem, look at the end of config.log. Make ...
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1answer
113 views

program cannot find libQt3Support.so.4 [duplicate]

I am trying to run a program but the program complains that error while loading shared libraries: libQt3Support.so.4: cannot open shared object file: no such file or directory I can see that the ...
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1answer
299 views

upgraded to 14.04 LTS, VLC is not working

recently upgraded to ubuntu 14.04 lts from ubuntu 12.04 lts. now vlc doesn't start. in terminal following output occurred - $ vlc VLC media player 2.1.6 Rincewind (revision ...
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1answer
58 views

Are QStrings mutable? [closed]

In python; strings are not mutable as far as I know. To change a string in python, you would have to create a new object. Is this the same for QString?
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1answer
23 views

How do you return a list of the current project folders and files of your current project in QtCreator?

I think Qt must have this, because QtCreator has a list on its sidebar: Ideally I am just looking for a Qt function that will just return this list. Thanks.
2
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359 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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1answer
41 views

How to run devcoin-qt?

Anyone know how to open devcoin-qt? I tried running it by double-clicking it but nothing happened. I shutdown the devcoind and tried it - nothing. I renamed the ~/.devcoin folder to .devcoin.old and ...
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42 views

Signal called on user logout

I would like to ask what is the signal that is called when the user logs out? I have a Qt gui app that has handler for SIGTERM and SIGHUP signals. The app also has its own close event handler, so user ...
2
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1answer
71 views

Ubuntu SDK: How can I use PyQt for developing Ubuntu Touch apps?

I've heard that it's possible, can you give me some pointers on how to do that?
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1answer
72 views

Ubuntu Touch: How can I debug ubuntu touch apps on the device? [duplicate]

My app works well on desktop but I can't figure out why does it crash on my nexus 7. How can I debug it while it runs on the device?
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1answer
227 views

Display the content of text file in qt creator [closed]

I am a newbie, using Qt creator 2.8,Qt 5.0.2 base. Till now i could open and access the file using main.cpp , Now i want to display the content of that file on executed window which pops up after we ...
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1answer
72 views

cmake not compiling with qt4

I am trying to build AMAROK on ubuntu 12. I have although installed Qt5 already but i am getting the following error. Please help me. CMake Error at ...