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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4
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2answers
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How to hide the header of the Tabs component

I'm writing an app using the Ubuntu SDK, and I've got a PageStack component inside aTabs component. When I load one of the pages inside the PageStack, it all works well, and in the header the name of ...
2
votes
1answer
1k 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 ...
2
votes
1answer
123 views

Weird error when launching VLC from command line [duplicate]

Does anyone know how to solve this error? I tried viewing the content of the files in question, but I can only see weird characters. cannot load module `/usr/lib/vlc/plugins/gui/libqt4_plugin.so' ...
3
votes
1answer
1k views

QML: How to do variables?

In QML, I am just looking for a way to do fairly simple variables: Bool String Integer
3
votes
1answer
726 views

Qt4 interface not working for VLC

This is what happens if I try to run VLC: main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. main interface error: option qt-volume-complete does not exist ...
-1
votes
1answer
123 views

Problems with GTK themes

A few weeks ago, I installed razor-qt on 14.04. everything was okay, but whenever i open a gtk application, it defaults to the elementary theme, as i had the pantheon de installed on it before. the ...
2
votes
0answers
133 views

Unity launcher, dash and menu fonts are not anti-aliased

I am running Ubuntu 14.04. After installing Qt4 settings manager and tinkering with it (changing the font face for Qt apps) I notice that unity launcher, dash and menu and date indicator fonts are not ...
2
votes
1answer
179 views

QML: QtQuick Extension Plugin - What is URI?

When starting a new Qt Quick Extension Plugin, it asks me to specify Object Class Name (Easy enough), but also something called URI. What does URI stand for? What does this project need URI for? ...
1
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0answers
30 views

What are the steps needed to implement a Qt class or member function into a QML project for Ubuntu-Touch? [duplicate]

Qt contains many classes and functions that are useful for a QML project, but not readily available. The existing solutions do not employ a method that is platform independent, thus it is unclear ...
2
votes
0answers
338 views

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 ...
3
votes
1answer
66 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 ...
0
votes
1answer
1k 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 ...
0
votes
5answers
4k 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 ...
1
vote
0answers
30 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 ...
3
votes
2answers
848 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.
7
votes
1answer
718 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 ...
5
votes
3answers
3k views

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.
1
vote
0answers
126 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
votes
1answer
226 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 ...
8
votes
1answer
252 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 ...
0
votes
1answer
188 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
votes
1answer
309 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 ...
1
vote
2answers
483 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 ...
4
votes
2answers
5k 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 ...
1
vote
1answer
87 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 ...
3
votes
2answers
731 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. ...
4
votes
1answer
7k 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 ...
0
votes
2answers
201 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 ...
4
votes
2answers
410 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 ...
4
votes
1answer
1k 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: ...
0
votes
1answer
107 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 ...
1
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0answers
42 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 ...
2
votes
1answer
6k 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
votes
1answer
543 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 ...
1
vote
1answer
22k 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 ...
0
votes
1answer
1k 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 ...
0
votes
1answer
211 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. ...
1
vote
1answer
402 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 ...
-1
votes
1answer
156 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 ...
0
votes
1answer
814 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 ...
0
votes
1answer
5k 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 ...
3
votes
1answer
513 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 ...
1
vote
0answers
124 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, ...
1
vote
1answer
598 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 ...
5
votes
1answer
380 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): ...
0
votes
0answers
33 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 ...
0
votes
2answers
80 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 ...
1
vote
2answers
4k 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
votes
0answers
259 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 ...
10
votes
1answer
462 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: ...