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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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' ...
2
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3answers
2k views

What's the development package for Qt5 in 14.04

I want to build a Qt5 example on my desktop machine. I installed qt5-default and qtdeclarative5-dev, but I'm still getting this error: Project ERROR: Unknown module(s) in QT: quick qml Which ...
21
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2answers
47k views

How can I install Qt 5.x on 12.04 LTS?

If you want to develop with QML 2.0 and Qt5, the base packages don't seem to exist in repository for 12.04. What PPA should I add? Is it a binary installer? a compile the toolkit yourself? Those ...
4
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2answers
296 views

How to detect events like lock/unlock screen, enter/return suspend and monitor power off

I am wondering if there is any way to detect system wide events under linux such as: user un/locked session user logs in/out machine sent to suspend screensaver goes on and the monitor switches off ...
7
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2answers
4k views

How to add shortcut to unity launcher programmatically?

I'm developing a program in Qt that will help users to manage (create, edit and delete) their quicklists in Unity launcher. I got to a point where I created .desktop file and I don't know how to ...
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2answers
583 views

Qt 5 configuration

I have a problem setting Qt5 apps correctly on my computer. I'm running Ubuntu 14.04 with KDE4, I have configured the look in the KDE system settings and that look is used in every qt4 apps and gtk ...
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3answers
2k views

How to install needed Qt packages to build kernel on 14.04?

I'm going to compile kernel on Ubuntu 14.04 64-bit, so I start with installing packages that I need: sudo apt-get install build-essential bin86 kernel-package libqt3-headers libqt3-mt-dev wget ...
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1answer
43 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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0answers
14 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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0answers
11 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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0answers
52 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 ...
0
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1answer
131 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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0answers
11 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
0
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1answer
54 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 ...
0
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1answer
3k views

How to install libQtGui.so.4 32bit on 64bit ubuntu

I am trying to compile the android tree on Ubuntu 64bit 12.04; The build fails on an error of missing shared library libQtGui.so.4; Check /usr/ lib files i found that: /usr/lib/ or /usr/lib32 doesn't ...
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0answers
15 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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0answers
23 views

QT4 applications don't show any style

I'm using Xubuntu 14.04 and since i installed qt5, my qt4 applications looks grey, and weird, not showing styles as it should. Someone else experienced this problem? (before and now)
2
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1answer
734 views

Font rendering problems with QT applications in Xubuntu

I'm currently using Xubuntu 14.04 but the same problem is present in 13.10 and 13.04, and maybe in previous versions. I always install truetype fonts and remove the anti-alias. In all the GTK ...
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1answer
727 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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0answers
21 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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0answers
48 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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1answer
54 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 ...
8
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1answer
336 views

Howto create a new C++ based Ubuntu touch project in Ubuntu SDK?

There is no option to start a C++ and QML based project in Ubuntu SDK. It only offers to create a QML project with no C++ codes. If I try to add C++ classes to the QML project, I get this error: ...
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1answer
19 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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1answer
2k views

Cannot mix incompatible Qt library

I found a lot of problems similar to mine on the web, but still no real solution. I'm having the annoying Cannot mix incompatible Qt library (version 0x40806) with this library (version 0x40802) ...
0
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1answer
27 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 ...
2
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1answer
44 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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0answers
25 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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0answers
39 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: ...
0
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0answers
29 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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0answers
17 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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17 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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39 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
51 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 ...
0
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1answer
28 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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0answers
91 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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1answer
52 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 ...
0
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1answer
138 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
43 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
20 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.
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1answer
4k 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. ...
0
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1answer
559 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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184 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 ...
0
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1answer
36 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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0answers
28 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 ...
0
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1answer
83 views

Display the content of text file in qt creator

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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37 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
45 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 ...
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1answer
37 views

dares-qt how to install

I have tried to reading one my old dvd however when i try to mount it, i get the following error : umut@DESKTOP-PC:/$ sudo udisks --mount /dev/sr1 / udisks --unmount /dev/sr1 / udisks --eject ...
2
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1answer
86 views

How can I store the value an user enters in a variable?

How can I store the value an user enters in a variable? For example I have this code TextField {width: 37; height: 19 var id: q1 ...