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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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 Here is the result: -DCSYNC_BUILD_PATH=/path/to/ocsync-build ...
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27 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 ...
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2answers
78 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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WARNING: TARGET is empty make: Nothing to be done for `first

Can anyone help with this error WARNING: TARGET is empty make: Nothing to be done for first'. I wish to build this qt package When I run ./compile in the the downloaded folder, it gives this ...
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17 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 ...
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QT applications indicator and appmenu don't work / ubuntu 14.04

I'm not sure when this happened,but form yesterday,I found my VLC player's indicator and appmenu dont work. there is no indicator icons and appmenu doenst appears on the top bar. Not only VLC but ...
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31 views

QT5.1.1 installation problem

while I try to installing QT in Ubuntu I got error as, Qt: Session management error: None of the authentication protocols specified are supported No marker found, stopped after 1.00 MiB.
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38 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 ...
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24 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.
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Shared library problem: OpenMesh

I have a Qt app with OpenMesh dependency. I built the OpenMesh library from source: cmake ... make make install It installed to the /usr/local/lib/OpenMesh folder: libOpenMeshCored.a ...
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86 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 ...
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59 views

How to completely remove Qt environment?

How to completely remove Qt environment? I installed Qt Creator Integrated Development from the Ubuntu Software Center, then I compiled and installed Qt 4.8.6. There were few errors when I try to ...
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25 views

Configuration of $QTDIR

I installed Qt from ubuntu repository. I'm on Trusty. Now I use a another program who need $QTDIR but when I enter echo $QTDIR, the terminal output nothing. How to set up this path without ...
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127 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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1answer
32 views

KGraphViewer replacement

Is there a replacement package for the deleted KGraphViewer? The qt dev pacakge is installed. Compilation of the latest Umbrello works. Also I tried to compile it from the git remake ...
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Qt-> how to set ALT key active

Can someone please explain how to set the Alt key as active permanently? I'm trying to make an application for Ubuntu and I need to make it active. I want to add it to the code below in the if ...
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2answers
235 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 ...
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170 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 ...
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43 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 ...
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62 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 ...
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30 views

(SOLVED) 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 ...
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2answers
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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, ...
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1answer
50 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 ...
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1answer
50 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 ...
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78 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 ...
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excel query in qt

I have a program to connect with excel file. my excel file contains usernames and passwords of users who has access Permission to application. in interface of the program i have two QlineEdit(one for ...
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91 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 ...
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33 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\" ...
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Qt C++ windowMinimized no reaction on Ubuntu

Heloo all! Me and a friend are creating an app for linux, everyting works but the custom minimize button doesnt whant to work on Ubunutu 14.04, there is no reaction when presed clicked an so on. Any ...
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1answer
42 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 ...
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65 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 ...
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114 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 ...
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61 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 ...
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108 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 ...
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25 views

How do you change qt themes by hand?

I am running a light desktop with Fluxbox and trying not to install anything more than I absolutely have to. I was wondering how one would go about changing qt4 and qt5 themes by hand much like you ...
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92 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 ...
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48 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 ...
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1answer
88 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 ...
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cannot find -lQtMultimedia

Using QtCreator with Qt 4.8 I need QT += multimedia in my pro.file I have already installed qtmobility-dev. Still my multimedia package is not found. Why?
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168 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 ...
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1answer
27 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 ...
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108 views

How to install Qt4.6 libraries on Ubuntu 12.04?

I use Ubuntu 12.04. I am working with Qt IDE. I need Qt4.6 libraries for supporting my applications. Instead of this Ubuntu 12.04 provide Qt Creator IDE based on Qt4.8.0 libraries by ...
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2answers
286 views

QML Qt 5.2 problem with mp4 video

I have qt 5.2(ubuntu sdk) installed on Ubuntu 14.04 When I try to run QML code: MediaPlayer { id: mediaPlayer source: "../path/test.mp4" autoPlay: true } VideoOutput { id: video ...
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81 views

run qt designer/qt assistant with commands designer/assitant respectively

I'm used to an environment where I run the qt designer/qt assistant simply typing designer/assitant in the terminal. I am talking about qt 4. I've been installing packages such as qtcreator and ...
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75 views

Systray not showing

I have an application called foo that runs as root. The foo calls system function to execute the other application which show tray icon using Qt. The Systray Icon Example in Qt is working properly ...
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80 views

How to fix no sound problem after startx in alsa sound driver

My development env is: OS: ubuntu 12.04.3 language: Qt 4.8.1 alsamixer ver: v1.0.25 I am using .xinitrc contents like this: alsactl restore rm -rf /tmp/.* clear while(true) do ~ => ...
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1answer
70 views

Build-Essentials installation failing

I am having trouble accessing the several critical header files that show to be a part of the build process. The "Ubuntu Software Center" shows "Build Essentials" as installed: Next I did the ...
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1answer
135 views

unable to run make during installation of kernel 3.3.6

desktop:~/Desktop/linux-3.3.6$ make xconfig make[1]: Warning: File `scripts/kconfig/.zconf.tab.o.cmd' has modification time 1.7e+04 s in the future CHECK qt * Unable to find the QT4 tool qmake. ...
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25 views

Qml HUD integration without MainView?

I'm working on an app with Qt Quick Components, I don't want to use any Ubuntu specific components because I want the desktop version of my app to be more portable than that (Qt 5.2 is enough of a ...
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181 views

Qt5-default package not found

I am trying to do: sudo apt-get installl qt5-default Reading package list... Done Building dependency tree Reading state information... Done E: unable to locate package qt5-default On a Qt-forum I ...