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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8
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153 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 ...
0
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0answers
81 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 ...
-1
votes
1answer
337 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
votes
1answer
547 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 ...
-1
votes
1answer
106 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?
0
votes
1answer
40 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
votes
0answers
645 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
votes
1answer
60 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 ...
0
votes
0answers
95 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
votes
1answer
188 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?
2
votes
1answer
195 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?
0
votes
1answer
524 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 ...
0
votes
1answer
127 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 ...
1
vote
1answer
87 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 ...
0
votes
0answers
43 views

How do I implement multiple keymaps into a kernel?

my problem is as follows: I have a custom-made kernel that has no functionality in regards of changing the keyboard mapping. It is possible to compile a different keymap into it, but that's it. The ...
0
votes
0answers
11 views

Best resources(books/articles/videos) for a new Ubuntu Touch app developer? [duplicate]

I am new to Ubuntu Touch and Qt, and I want to master developing applications for it. I want to start quickly, and then learn it in depth. What are the best books for me to read? Can you outline the ...
8
votes
1answer
7k 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) ...
2
votes
1answer
782 views

Ubuntu 14.04.1 and unmet dependencies for ubuntu sdk. Use Qt Creator instead [duplicate]

I'm trying to install Ubuntu SDK, but get the same problem like here (first, second). The promoted solution like this doesn't help me either ( The following packages have unmet dependencies: ...
1
vote
1answer
775 views

Ubuntu App Development. Unable to install Ubuntu SDK and buggy Ubuntu emulator

Hello I have installed Ubuntu 14.04.1 and I have no more patience to struggle with my problem. I can't install ubuntu-sdk package: Some packages could not be installed. This may mean that you have ...
1
vote
0answers
59 views

Qt-creator publish tab missing click part

I am trying step by step to write some simple tutorial Ubuntu apps using qt-creator. First I've chosen HTML5 App then after writing some hello code or even after doing nothing I've tried to create a ...
0
votes
1answer
458 views

Cannot cmake mirall because Could NOT find Qt5Keychain (missing: QTKEYCHAIN_LIBRARY)

I am trying to compile Mirall on my Ubuntu 14.04.1 LTS. Here is the command I am using: cmake -DCMAKE_BUILD_TYPE="Debug" ../mirall ...
1
vote
1answer
487 views

How to get root permission inside qt program?

I run my QT app without sudo permission but during running phase of the app I need to install the .deb so I am running the command dpkg -i mydeb.deb with qprocess in QT or some other commands which ...
2
votes
3answers
6k 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 ...
1
vote
0answers
139 views

How to configure Qt to access standard icon resources/themes?

I am developing an app using Qt designer and struggling with mechanizing the icon resource themes. Essentially, I'd like to access all of the standard icons when I click choose resource. Where on ...
1
vote
1answer
69 views

Launchpad Qt/C++ and external tools

I'm new to Ubuntu developpement and searching for information regarding building apps through launchpad (using recipes). I have a project of building a Qt5/c++ webkit app and wanted to ask: how to ...
2
votes
1answer
78 views

Can I hide the mnemonics in Qt applications?

Using stock Ubuntu. The underscores in the menus make these apps (Skype, to a lesser degree VLC etc.) look out of place and (imo) ugly.
8
votes
3answers
10k 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 ...
3
votes
2answers
2k 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 ...
0
votes
1answer
204 views

KGraphViewer replacement

Is there a replacement package for the deleted KGraphViewer? The qt dev pacakage is installed. Compilation of the latest Umbrello works. Also I tried to compile it from the git remake ...
2
votes
2answers
4k views

Installing Qt Creator 3.1.2 on Ubuntu 14.04 LTS

I have found PPA and manual method to install Qt Creator 3.1.2 on Ubuntu 14.04 LTS. Which one is more reliable (has less bugs once installed)? The manual method offers 64 bit installation. What if I ...
0
votes
2answers
3k views

Ubuntu Qmake is not an executable

I have the latest versions of qtcreator, qt5-qmake build-essential and g++ installed. In option of Build & Run and choose qmake in /usr/bin/qmake I get this error: The qmake executable ...
1
vote
1answer
290 views

Where are the Build and Src locations for QtCreator?

In the QtCreator Plugin Creation Wizard, this http://doc.qt.digia.com/qtcreator-extending/images/firstplugin-pluginsetup.png window asks for Qt Creator Sources, and Qt Creator Build. I installed ...
0
votes
2answers
384 views

Installation qtsampleplayer ubuntu 14.04

I'm new to Linux so please accept my apologies if the question is trivial. I'm trying to install qtsampleplayer under Ubuntu 14.04 (32bit) according to these instructions: Prerequisite: libdash must ...
0
votes
1answer
66 views

Build libqtwebkit4.so from sources

I'm trying to build libqtwebkit4 from sources : https://launchpad.net/ubuntu/+source/qtwebkit-source Everything goes right: I have instilled all dependencies (gtk3, glib, pango,...) ./autogen.sh ...
1
vote
2answers
461 views

I can't open Qt 4 Designer on latest Ubuntu

I click the Icon, and it will flash but will not open. Qt Creator works, but I'm trying to use Python. I've tried remove and install a couple times, but still nothing. I have downloaded PyQt4, ...
2
votes
1answer
116 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 ...
2
votes
1answer
367 views

how to resolve “TypeError: Cannot call method 'push' of null”

I'm a new qml programmer and I found my self in this problem that when I want to call a new page when clicked on a button it says: TypeError: Cannot call method 'push' of null I've tried everything ...
1
vote
1answer
282 views

Restore qt integration after removing KDE

Restore GTK integration after removing KDE; this shows how to remove the kde-theme for gtk, and now I want to do the same for qt-applications. I have tried qt4-qtconfig, and it does not work. Here is ...
0
votes
1answer
636 views

How do I install things? Or, what's xcb and qt and how do they solve the riddles of my life?

tl;dr is at the bottom for those not wanting reasons, just questions. I have the latest TeamSpeak client downloaded from the site of the authors of said program. I've managed, after a load of ...
0
votes
1answer
168 views

Trying to make my sixaxis ps3 controller work on my computer for minecraft

Ok so I followed the steps on here and on steps 8 and 9 I got this g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DDEVDIR=\"/dev/input\" -DICON24=\"/usr/local/share/pixmaps/qjoypad/icon24.png\" ...
0
votes
1answer
276 views

debug symbols for Ubuntu 12.04

I try to watch how programs work by running them by the 'Qt Creator' debugger. For better orientation I'd like to see also the system (core) utilities fully in the call stack window as I am used from ...
2
votes
1answer
305 views

Can both appmenu-qt and appmenu-qt:i386 be installed at the same time?

OK, so here's the backstory. Skype recently released version 4.3 on Ubuntu. It now has a menu bar, which it did not before. The only issue is that because it is 32-bit software, it's menu bar is not ...
1
vote
1answer
520 views

emit signal with custom type objects array parameter from c++ and receive in qml

I would like to emit a signal from a Qt C++ class which includes a parameter that is an array of custom objects (inherited from QObject) and receive the parameter in its qml slot, but i'm afraid it is ...
1
vote
1answer
82 views

How to make a project of Krusader

An example for my general question An introduction to translating and debugging source code : I had installed the 'Qt 4 Designer' and I have downloaded the krusader-2.4.0-beta3.tar.bz2 file. Among the ...
1
vote
1answer
741 views

LD Library Path

I am not sure whether my LD_LIBRARY_PATH is working. I installed Qt5.2.1 on Ubuntu and tried to execute an application from the command line using sudo ./App1. ( App1 needs sudo access, hence I ...
0
votes
1answer
275 views

Setting up Themes in LX-Qt

I recently installed LX-Qt on Ubuntu Server. Everything went fine, but there seems to be an issue with the themes. When a theme is set in "Qt Configuration" (currently "QtCurve"), it doesn't change ...
2
votes
1answer
531 views

Ubuntu SDK: How do I implement a “onClick” for an image in QML?

I have a background image for my page, and I want to implement a sort of page refresh when the background is clicked. However, I didn't find any actions for the image element in QT quick. What's the ...
1
vote
1answer
475 views

QML: Overriding a signal handler from other element

Is it possible to override an elements action (eg onTriggered() of a Timer) from within the onClick() of a button? Something like so-> Button { id: centerBtn ...
0
votes
1answer
2k views

Install old QtCreator on Ubuntu 14.04

I want to build my application on Ubuntu. The last versions have been tested and programmed under Windows, because it is a multiplatform application. Sadly, under Ubuntu the systray icon did not work ...
3
votes
1answer
111 views

Unable to access i18n in QML app's JS file

I'm having trouble importing the i18n library included in Ubuntu.Components 0.1 for use in a JS file. I initially ran into my question/problem while hacking on the 'Clock' Ubuntu Touch core app, but ...