Qt is an application framework originally created by Trolltech and currently managed by Digia. The KDE desktop uses the Qt framework for its applications.

learn more… | top users | synonyms

0
votes
2answers
1k views

QT code for U Touch returns `qmlscene: cannot find qt installation of ''`

I'm trying to start developing for Ubuntu and Ubuntu phone, but I get an error: qmlscene: cannot find qt installation of '' when I attempt to run my application in Ubuntu from the command line. I'm ...
9
votes
1answer
749 views

What does the takeover of Nokia mean for the Ubuntu SDK?

Well, the title says it all: What does the takeover of Nokia by Microsoft mean for the Ubuntu SDK, as the Ubuntu SDK relies on Qt which is (was?) a Nokia project?
2
votes
0answers
487 views

Qt 5.1.1 installation problem

I am new to ubuntu and using 12.04 LTS. I tried to install Qt5.1.1 without software manager. I downloaded the qt-linux-opensource-5.1.1-x86-offline.run file and ran it. It ran smoothly and got a ...
4
votes
2answers
4k views

Can I sell my PyQt4-app without having a PyQt license?

I would like to sell a Python application that uses PyQt4. The commercial licenses for Qt PyQt cost thousands of Euros together. Do I need to buy a commercial license? Consider this from a ...
0
votes
1answer
133 views

Qt sdk for ubuntu development creating 3 Qml2puppet upon design mode

When I create a project in Qt Creator 2.7.1 on Ubuntu 13.04 64bit the project is all fine. But when I enter the design mode on the left side menu, then there are 3 instances of Qml2puppet appearing on ...
0
votes
1answer
255 views

ibus 1.4.1 doesn't work with Opera 12

Environment: Ubuntu 12.04 Opera 12 ibus 1.4.1 I've installed ibus-qt and add the two lines below in /usr/bin/opera, but it makes no difference: QT_IM_MODULE=xim XMODIFIERS="@im=ibus" As some say ...
1
vote
1answer
361 views

Skype [4.2.0.11] - black Video on KDE - 13.04 32bit

I have this strange issue with skype: using Unity and other DE ( lxde/E17 ) everything works fine using KDE/BE::Shell I have black screen in the video/webcam box ( also in option in video tab) I ...
0
votes
1answer
242 views

no ubuntu touch templates in qt 5.0.2

I have been using qt for some time now (lastly Qt 4.8), writing some desktop apps. Now I wanted to try doing something on ubuntu touch and so I installed the Ubuntu SDK. What I did was uninstall my ...
1
vote
1answer
1k views

Missing compiler error in QtCreator and Qt5.1.0 on Lubuntu 13.04

I can't compile any program in QtCreator on Lubuntu 13.04. I have this error: QtCreator needs a compiler set up to build. Configure a compiler in the kit options First of all, I installed from ...
2
votes
1answer
1k views

Qt build in Ubuntu 12.04

I have installed Qt Creator 2.7.2 'Based on Qt 5 1.0 (32 bit)'. First I have tried its example analogclock, but its building does not find a command g++, while I have installed the gcc compiler. See ...
0
votes
1answer
129 views

Gtk skip_taskbar_hint (seen in Glade-ui-Designer) equivalent in Qt

With Glade Designer that lets you set up Gtk-Ui's you can check the option that windows are not shown in the launcher. If I take a look at the ui-file generated by Glade, it says <property ...
0
votes
1answer
216 views

QT Linguist phrasebook from .TS file

I'm working on a Translation with QT Linguist. Several words have multiple entries so I would like to Reuse the words already translated to "batch translate" the rest of the files. Batch Translation ...
2
votes
1answer
108 views

db.changeVersion doesn't work as expected

I'm trying to upgrade a DB in an app. I use QtQuick.LocalStorage 2.0. When I call db.changeVersion it works, but db.version doesn't change until app restarts. db.changeVersion(db.version, "2", ...
0
votes
1answer
84 views

Change tab from code using ubuntu SDK

How to change tab using code in QML in Ubuntu SDK? The answer is: If tabs are defined as follows: Tabs { id: tabs ..... } then using this: tabs.selectedTabIndex = 0 will get ...
2
votes
2answers
507 views

Qt5 with Qt 4.7 on Ubuntu 13.04. How to install it both without conflicts?

I'm using Qt5 and need Qt 4.7 now (for embedded device). Is it possible to install it additionally on Ubuntu 13.04?
2
votes
1answer
2k views

QtQuick not found (Lubuntu)

On a fresh Lubuntu 13.04 installation, I installed Qt5 from the official ubuntu repositories. But this installation of Qt5 can't find the QtQuick module. What am I missing? qmlscene test.qml ...
-1
votes
1answer
90 views

Unity 2d for Qt [closed]

I Need the source packages of Unity 2d to rebuild and run on Qt , the problem is that I'm using Qt on windows right now. and I have no idea how download the Unity 2d on windows 7.
1
vote
1answer
2k views

build a project with qmake-qt4

I'm new user of Ubuntu, so excuse me if my question is very obvious. I have a 32-bit Ubuntu 11.10 installed in VirtualBox, and I want to build a project using qmake-qt4, the problem is that I don't ...
2
votes
0answers
562 views

Amarok doesn't start after qt4-related ubuntu updates (from raring-updates)

Last Monday I updated my Ubuntu 13.04 and there were a bunch of qt4 related updates. (I don't know how to have a list of the updated packages which isn't taking a screenshot of Ubuntu Software Center ...
1
vote
1answer
713 views

Compiling software generated with an old version of Qt Designer

I'm trying to compile and install K3dsurf following the instructions in the "Readme", which says: tar -xvzf k3dsurf-0.6.2.tar.gz; cd k3dsurf; qmake; make; ./bin/k3dsurf & ; The problem is that ...
2
votes
1answer
957 views

Problem with QtCreator after update

I installed the ubuntu-sdk 2 days back on my machine (12.04) and the Qt version that is installed is 5.0.2. Everything was working perfectly, but today there were some updates from the ...
1
vote
1answer
57 views

How can I create charm on one node

Firstly I generation nodejs file on the node without charm then my boss said we need charm for generation. I need in this charm QT5, NODEjs, Berkeley db, g++ with gcc but I don't know how create ...
0
votes
1answer
4k views

How to install SIP+PyQt with apt-get + pip + virtualenv?

[I originally posted this question, under a different title, in StackOverflow (here), but later I realized that my problem is very specific to apt-get, hence I am re-posting it here. Sorry for the ...
1
vote
2answers
3k views

“Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed

I wrote application for linux which uses QT5. But when I am trying to launch it on the linux without QT SDK installed, the output in console is: Failed to load platform plugin "xcb". Available ...
0
votes
1answer
154 views

How to minimize PyBitmessage to the system tray?

I recently installed PyBitMessage, and now I can't get it to minimize to the system tray. If I click the red X, it just exits (unlike Transmission, which can be configured to "survive" being closed - ...
4
votes
1answer
442 views

Does Ubuntu Phone APIs include Qt Mobility?

I'm currently developping an application for Meego/Harmattan. This app uses Qt Mobility API, and can easily be ported to SailfishOS. I would like to know if this API is also supported in Ubuntu Phone ...
7
votes
2answers
2k views

How to pass the image preview from the QML Camera component to a C++ plugin

I'm writing an Ubuntu Touch QML app that captures and processes images from a camera device. The processing is done by a C++ plugin to which I'm passing the URL of the image. I can successfully save ...
3
votes
1answer
2k views

How to emit onDropped in QML drag n drop example?

In the qml documentation there is a drag'n'drop example: import QtQuick 2.0 Item { width: 200; height: 200 DropArea { x: 75; y: 75 width: 50; height: 50 onDropped: ...
0
votes
1answer
200 views

How to add Password encryption

I have an encryption app that just encrypts a string and then can decrypt also.. But how can I make it so the user sets a password and the other person has to put in that password to decrypt the ...
2
votes
0answers
188 views

Compose Key combinations are wrong in KDE/QT apps

On Kubuntu 12.04 LTS. For some reason, Qt applications (Kate, Konsole, etc.) were loading the ISO8859-1 Compose key file, instead of UTF-8. Other applications (Chrome and Java apps, for example) were ...
0
votes
3answers
461 views

How to open a crontab file in c++

I am working on a QT application which makes the usage of crontab easier with GUI. But I am facing the trouble of including the jobs in the crontab file from my application . So how do i open a ...
2
votes
1answer
7k views

Missing libqt3-mt in 13.04

I have an application that requires the libqt3-mt package, in particular it's asking for libqt-mt.so.3. It worked OK under Ubuntu 12.04, but I've recently upgraded to 13.04 and the package is missing ...
2
votes
1answer
801 views

i want to open a file in the root directory in my c++ application in write mode.

I have a file in the root directory which I want to open for editing in my QT application. Generally we use "sudo (editor) filepath" to open the file with roots permissions. But i want to achieve ...
3
votes
1answer
196 views

Re-use toolbar code for each tab

I'm creating a music app using QML and it uses around five tabs, each using a toolbar. The toolbar should look the same, so instead of having the exact same code for each tab, I wanted to re-use the ...
0
votes
1answer
251 views

Ubuntu Touch SDK problems

I have installed the Ubuntu touch SDK the way it is advised on the Ubuntu dev website (with sudo apt-get install ubuntu). I'm using Ubuntu 13.04. The problems/symptoms are the following : When I ...
5
votes
3answers
3k views

Missing documentation for Qt5 on Ubuntu 13.04

I use Qt Creator for building applications and recently I decided to upgrade my Ubuntu from 12.10 to 13.04 and upgrade my current project from Qt4 to Qt5. The problem is that the Help section provides ...
3
votes
1answer
8k views

How to install Litecoin

I'm trying to install litecoin on my ubuntu 12.04 machine. I downloaded the Litecoin-Qt from http://litecoin.org/ and extracted it to ~/ Then based on the README, I did the following: ...
5
votes
2answers
333 views

Ghost title bar in Qt programs

I'm using Ubuntu 13.04 and I guess ever since I updated it from 12.10 I've been having a problem with qt applications (VLC and K3B, specifically). Sometimes, when I open them, the title bar doesn't ...
-1
votes
1answer
507 views

Downgrade qt in Ubuntu 13.04

I use Ubuntu 13.04. Does anybody know how to downgrade qt to the version 4.8.2?
1
vote
1answer
921 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 ...
6
votes
1answer
2k views

Installation of capybara-webkit ruby gem

I have following errors when I try to install capybara-webkit ruby gem Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. ...
2
votes
0answers
205 views

PySide application lost icons when upgraded to Ubuntu 13.04

I'm developing an application in Python 3 using PySide. I upgraded my system form 12.10 to 13.04 today, and now I no longer have icons in my toolbar. The icons are loaded using QIcon.fromTheme(). Does ...
0
votes
2answers
300 views

Grid view at Ubuntu touch - How to use it?

In article about content views is a part about a Grid view. But I didn't found anywhere how to use it. Do you knew something about it? Tahnks for answer!
1
vote
1answer
1k views

install qtSerialPort library

I want to install qtserialport in precise1-Ubuntu. I got the source directory using git. next I download lib-qt4-dev and qmake. I ran qmake. it works fine. but, make fails with the following error: ...
1
vote
2answers
89 views

ListView doesn't appear

I'm working at app for ubuntu touch. I have a code with listView in it. But when I run it the page is simply empty (tehre is a title and a tabs switcher). Where is the mistake? import QtQuick 2.0 ...
1
vote
1answer
553 views

Ubuntu touch tools

I'm doing a porting exercise to port an application from Ubuntu to Ubuntu Touch. The application uses gcc 4.1.2, CMake 2.6.4, binutils 2.22. Q1. What tools are needed for setting up a Ubuntu Touch ...
0
votes
1answer
786 views

Unable to install qt-sdk unmet dependencies

I tried to install qt-sdk under ubuntu 12.10 how can I fix this issue? install log: apt-get install qt-sdk Reading package lists... Done Building dependency tree Reading state information... ...
0
votes
1answer
201 views

Should I choose KDE or Qt for an Ubuntu application?

I'm writing an application using QML and some C++ code. The main window will be all QML (possibly having a main menu bar provided KXmlGuiWindow), with the backend and some dialogs written in C++. I've ...
18
votes
3answers
14k views

Why is canonical choosing QT over GTK for Unity's next generation?

So much has been written that I'm kinf of confused, but if I'm not mistaken Canonical is building the next generation of Unity for mobile devices with Qt, and in the near future the desktop will also ...
23
votes
2answers
54k 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 ...