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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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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42 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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1answer
20 views

What is the difference between Ubuntu.Components and QtQuick?

QtQuick 2.0 Ubuntu.Components 0.1 Are two common imports when developing applications for Ubuntu. Are these classes? Can you import member functions this way? If yes, how can tell what member ...
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42 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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3answers
1k views

Symbol lookup error: /usr/lib/i386-linux-gnu/libQtOpenGL.so.4: undefined symbol: _ZNK14QWidgetPrivate17hasHeightForWidthEv

I installed skype using several process in my newly installed Ubuntu 14. 04 64 bit... it shows a skype icon in dash... but when I click on it, nothings happens. What can I do? I tried almost ...
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11 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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2answers
33 views

Difference between Qt Creator and Ubuntu SDK?

Having downloaded them both when I installed the Ubuntu SDK, I wonder if there is any tangible difference between the two, such as the libraries being employed.
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1answer
104 views

Can't change keyboard layout in some Qt programs

The problem after a recent update in my Ubuntu 13.10 with Unity. When typing something in Qt Creator 3.0.1 or in my own program compiled with Qt 5.2.1 (from qt-project.org), I can't change keyboard ...
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1answer
82 views
+50

QML: Simplest way to write to a text file?

QML at the moment lacks basic system commands, so I am looking for the most simple template to write to /tmp/text.txt. Here is a starter: import QtQuick 2.0 import Ubuntu.Components 0.1 import ...
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0answers
20 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 | - ...
2
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1answer
81 views

Why wouldn't sound be heard on the phone when it works on the desktop with an Ubuntu Touch app?

I have an Ubuntu Touch application in the works. The application needs to playback sound. I've used QtMultimedia from C++ for sound playback. The sound plays fine on PC but not on the phone. The odd ...
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17 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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34 views

apt-get install <package> equivalent using C++ apt-pkg library

I am building a small QT (C++) application where I ask user the software he want to install. Once he selected some packages a, b, c from the list all I have to do is run sudo apt-get install a b c ...
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35 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 ...
0
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1answer
31 views

Problem installing QtOctave

First I installed MATLAB and I got stuck here: No MATLAB executables were found in the directories you specified. This package requires at least one local installation of MATLAB. I was unable to ...
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2answers
54 views

What's the best way to make a Qt executable program run as a service in Ubuntu

I've written my Qt code for an embedded system which is running on Ubuntu. I want to run my program as a service in Ubuntu so I can stop or start it using monit. I've seen some people creating a new ...
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1answer
97 views

Qt5 installation and path configuration

I have installed Qt5 from the Qt5 project site, to the following directory /opt/Qt5 I would also like to mention that I had Qt4 installed previously, I have removed all instances of Qt4 through ...
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1answer
15 views

How to set a default file manager for qt's app?

I am running on ubuntu with awesomeWM which does not have specific file manager. When I launch vlc or any other Qt app and try to open a file from there, it does segfault after the following error ...
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30 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 ...
3
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1answer
62 views

Appmenu with QML App

I'm developing an Ubuntu SDK meant to be used on both the desktop and touch interfaces. Obviously the menu that slides up from the bottom of the window is not a great interface for the desktop. ...
0
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2answers
112 views

How to call Qt or local function from Ubuntu HTML5 App?

I have create a HTML5 App from Ubuntu SDK. It contains a index.html and js directory. Next I add "X" label on the html file like this: <head> ... <style type="text/css"> ...
0
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1answer
377 views

how to install both qt5-qmake and qt4-qmake

There is no qt5-qmake on default LTS 12.04 repository so I am using ppa from ubuntu-sdk-team ppa:ubuntu-sdk-team/ppa However since this or previous month, it stopped working to me. Now when I try to ...
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2answers
47 views

Compile Qt3-program on KDE4

I want to compile a program (KTIGCC), but it is intended to be used on KDE3, using Qt3 libs. Is there any possibility of compiling and using this program in my current KDE4? Trying to run ./configure ...
2
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1answer
84 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 ...
2
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1answer
143 views

QT theme in Clementine in 13.10

I have a strange problem with QT theme in Clementine. When it is run from sound menu (notification area), it has Windows classic theme: When it is run from terminal or Ubuntu menu, it looks OK: ...
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43 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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1answer
65 views

Missing package in Ubuntu SDK - qtdeclarative5-ubuntu-webapps-api

Installing the Ubuntu SDK failed because of missing package qtdeclarative5-ubuntu-webapps-api this was the message from apt-get: The following packages have unmet dependencies: ubuntu-html5-sdk ...
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35 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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0answers
58 views

Error installing Qt4 on Ubuntu 11.10 ARM [closed]

I'm working on a Nitrogren6x ARM platform. They provide an image based on Ubunu 11.10. This works like expected and I don't want to upgrade to some newer Ubuntu version. We are trying to run some Qt4 ...
2
votes
1answer
275 views

how to write characters to serial port

I have an ancient serial spectrometer which only runs on win9x. I want to convert to a Linux system, but the existing software is proprietary and wont work. I was able to access a console internally ...
2
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1answer
79 views

How do I add a qrc file to my Ubuntu Touch qml project?

My UT QML project makes use of a set of images, and I was planning use them via "qrc:///pathtoimages/myimage.png" style of url. In Ubuntu SDK, I can "add new... Qt / Qt Resource File". The file is ...
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1answer
3k views

Ubuntu 12.04 LTS - installing Qt 4.8.5 and Qt Creator

I found the official guide about how to install Qt 4.8.5 on Ubuntu 12.04 But that approach requires building Qt SDK (which may take some time) and setting everything manually. Moreover I need also ...
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1answer
97 views

How to install QtMultimedia source?

I need QtMultimedia to compile an open-source project. But it wasn't installed with qt. I've tried sudo apt-get build-dep qtmultimedia5-dev But it doesn't find such a package. I've downloaded it ...
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1answer
64 views

Package ubuntuone-control-panel-qt isn't available

Just installed Ubuntu 12.04LTS 64bit and I'm setting up Ubuntu One, but it wouldn’t let me. Package ubuntuone-control-panel-qt isn't available There isn't even any more available information. ...
0
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1answer
74 views

Autokey (autokey-qt) freezes and won't insert text

Per some suggestions on here and lifehacker, I began using autokey. It worked great for a week, but as of today it now hangs when I try to enter name new phrases. usually won't close when I push ...
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1answer
100 views

64bit packages being removed when installing Skype/Teamviewer

I am on Ubuntu 12.10 and when I try to install skype I get the expected message about missing dependencies and when i run sudo apt-get install -f I get this The following extra packages will be ...
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31 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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1answer
747 views

no menu in dogecoin-qt wallet client

As you can see, there is no menu on the top menu bar. It says "Dogecoin - Wallet" but there are no "File", "Settings", or "Help" menu titles. Clicking on the word "Dogecoin" in the menu bar or on the ...
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1answer
4k views

dogecoin wallet client dependencies (boost)

I seem to be missing something boost related. Dogecoin gives the requirements as: qt4-qmake libqt4-dev build-essential libboost-dev libboost-system-dev libboost-filesystem-dev ...
2
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1answer
162 views

How to start dconf and gconf in a non-Gnome environment?

I am running Openbox without any DE. And I also use some Qt apps such as VLC, Virtualbox and Skype. However, they require some gconf / dconf settings to be set. For instance to set the correct icon ...
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40 views

Is signal handling in QtQuick asynchronous? [closed]

I have the following QML document: Item { id: item MouseArea { onClicked: { /* emit signal */ item.someSignal(); } } ... } When I click the item, ...
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vote
1answer
175 views

Qt QML modules, how to import them and know what to import & QtMultimediaKit 1.0

In the last question, (How to insert Video element in my Ubuntu application?) I thought that I could create the Video element with the QtMultimediaKit1 . But I tried to import QtMultimediaKit 1.0 and ...
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0answers
34 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). ...
4
votes
1answer
126 views

How to insert Video element in my Ubuntu application?

I saw on some sites that you can insert videos with the Video element by importing Qt 4.7 and QtMultimediaKit 1.1 . But I have an error by compiling the project (it's a tabbed touch UI project): ...
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31 views

QML Ubuntu SDK : How to insert Video element [duplicate]

Hello everybody! I am learning Qml and using the Ubuntu SDK tool in addition to QML elements. I saw on some sites that you can insert videos with the Video element by importing Qt 4.7 and ...
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36 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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2answers
51 views

qml file and app.js not found

I am a newbie in ubuntu app development. I am going through the tutorials in developer.ubuntu.com. The thing is when I created a sample ubuntu-htmui project, no .qml file is being created as explained ...
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2answers
1k views

Can't start ubuntu 12.04 in GUI

After entering sudo apt-get install libqt4-dev intltool a lot of important stuff deleted automaticly. No graphic interface available anymore! Need help! I use hotot as twitter UI on my desktop. ...
2
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0answers
125 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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156 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 ...