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 detect if a MouseArea is over a GridView item

This question is not specific for the Ubuntu platform, but as I am developing an Ubuntu Touch app, I'd like to ask first here. I have a list of UbuntuShapes arranged in a GridView - generated from a ...
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14 views

Serial port blocked. How can I detect what it is?

I am using Qt (QSerialPort) to handle the port. At startup, I am attempting to open the port every second. It takes in average 12 cycles not to get back an error, which is: ...
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9 views

Running QLandkarte GT on 1024x600 resolution

When I start QLandkarte I found that it has no maximize/minimize/close buttons on right window corner and it fits uncomfortable in 1024x600 resolution screen. QLandkarte window don't fill screan width ...
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16 views

How to get and install qt header and libraries in specific folder?

Where do I get qt header and libraries from? And then how do I install qt header and libraries in specific folder?
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1answer
22 views

Cannot execute QT console program in ubuntu [duplicate]

An error occurred. Starting /media/milo/DATA1/Milo/C++/build-test-Desktop-Debug/test... Cannot execute '/media/milo/DATA1/Milo/C++/build-test-Desktop-Debug/test': Permission denied ...
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8 views

Problem compiling with QT4 libraries in pbuilder

I am having trouble getting pbuilder or launchpad to build a package that uses the QT4 libraries. The build script that I am using is below ( I didn't write it ). It compiles fine on a vanilla ...
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1answer
28 views

Use g++-4.8 with Qt

I am trying to compile a Qt project that uses the "override" keyword, and thus needs GCC 4.8. I have installed GCC 4.8 on my Ubuntu 12.04 machine already, and it lives in /usr/bin as gcc-4.8 and ...
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1answer
22 views

Ubuntu 15.04: Change KDE application's icons

is there a way to change the icon theme that is used by KDE applications like Krusader in Unity? KDE systemsettings don't work any more. Can't I just edit some file? Thanks
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32 views

Static QT libraries for Ubuntu 14.04

Is there a package which contains all static QT 5 libraries? There are only some static libraries in the qtbase5-dev package (and its dependencies). To be more precise, the static versions of Qt5Test, ...
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28 views

Adding qt4 and qt5 to global path

I have downloaded a source code from github. It is using qt and in many files it has the following headers included: #include <QApplication> #include <QApplication> #include ...
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11 views

Focus Writer 1.4.4 has an error when I type in Korean

$ focuswriter QGtkStyle was unable to detect the current GTK+ theme. QString::arg: Argument missing: "문단: % L1" , 0 QString::arg: Argument missing: "문단: % L1" , 0 QString::arg: Argument missing: "문단: ...
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121 views

Unity desktop on Raspberry Pi 2

The first thing needed to make it work is a driver. There was a Mesa and DRM driver for Broadcom VC4 developed recently by Eric Anholt. It's an OpenGL driver. http://dri.freedesktop.org/wiki/VC4/ ...
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1answer
13 views

CoverFlow app for Screenshots

Does anyone remember how the tiny little KDE/QT tool to create stylish (reminiscent of iTunes' CoverFlow effect) screenshots with reflections? One could select some screenshots (or other pictures) and ...
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19 views

Virtual box crashes with undefined symbol

When executing Virtual Box through GUI doesn't pop up anything using terminal it crashed with error: root@mayur-laptop:/home/mayur/Documents/MyOs# virtualbox VirtualBox: ...
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2answers
40 views

File access outside application directory

I want to know is it possible to access files outside the application directory? e.g. /home/phablet, /media, etc. Okay, so precisely I want to use QDir and QFile to read the folders and the files ...
1
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1answer
35 views

disable automaic update for texmaker [duplicate]

I'm new to Ubuntu 15.04 and I experienced problems with Temaker, namely the keyboard shortcuts did not work after some time. However, manually installing the version compiled with Qt4 fixed the ...
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64 views

KDE/QT applications on Xubuntu 15.04 are horrible

All installed KDE/QT applications on Xubuntu 15.04 are horrible (clementine, digikam, etc...). I think the layout miss all kde/qt library. See there http://postimg.org/image/ng087lkkb/ Why? How can ...
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63 views

Problem with installing Qt5.3

I am trying to install Qt5.3 into my Ubuntu 14.04(64 bit). While installation process was running suddenly it was showing some prompts and showed several error messages as following: Error during ...
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1answer
19 views

How to add packages installed manually to the system's package database?

I installed QT Creator by off-line installer in Ubuntu 14.04 and now i want to install Ubuntu SDK but it still lists QT Creator as software that need to be installed in the system. Ubuntu Software ...
2
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0answers
101 views

How to make Qt apps use GTK+ style in Xubuntu 15.04?

I'm using Ubuntu 15.04 right now, and Qt apps like qBittorrent and Clementine looks like they were GTK+ apps, they use the systems icons and style. But I installed Xubuntu in another PC and doesn't ...
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14 views

ubuntu licence for commercial apps

I want to submit a commercial application in ubuntu software center... in publish process there is a part that ask licence file (list of numbers) First, what is the syntax of this file? Second, how ...
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1answer
59 views

Ubuntu Phone - detect system type Desktop or Mobile

Is there a way to detect platform from QML or Qt C++ classes? I have Qt/QML project supplied to Linux/Android/Windows at one time, I see it's possible to deploy it to Ubuntu Phone. Is there a way to ...
2
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1answer
89 views

How to install PyQt for python3 in ubunt 14.10?

I found some tutorials online for earlier versions of Ubuntu but they didn't seem to work on Ubuntu 14.10, either that or I was doing it the wrong way, I want to use QtDesigner to design a GUI, use ...
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1answer
216 views

Ubuntu 12.04 - Install newer libqtwebkit4 instead 2.2.1 for ScudCloud

I am trying to install ScudCloud, but it requires libqtwebkit4 version 2.3.2 or greater. Unfortunately, in Ubuntu 12.04 the latest version still remains in 2.2.1. Is there a PPA or an alternative ...
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1answer
109 views

How to make and application for Ubuntu phone OS in QT creator? [closed]

I want to develop and application for Ubuntu Phone os. How to do this in QT creator? Is it really possible to create an app for ubuntu phone os? or is does the Ubuntu phone apps made in the same way ...
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1answer
128 views

Ubuntu 14.10 : Qt5 assistant not found

I am working on a system running Ubuntu 14.10 in which I have started programming on Qt5. Before for few months when I was working on Qt, I found that that QT-assistant tool really comes in handy. I ...
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1answer
81 views

Building ubuntu touch app with sql (mysql) support problem

i`m trying to develop simple ubuntu application. This application should connect to remove mysql server, query and display data in UbuntuListView. Project was created in Qt Creator 3.1.1 as QML app ...
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1answer
53 views

marble-touch offline map viewer fails to start

Ubuntu 14.04 with Unity, marble-touch 4:4.13.3-0ubuntu0.1. It doesn't start: $ marble-touch qrc:/main.qml:13:1: Type MarbleWindow unavailable qrc:/MarbleWindow.qml:11:1: module "com.nokia.meego" is ...
6
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1answer
141 views

Program[Digikam] chooses wrong qt lib and crashes

I run Ubuntu 14.04 64bit. Digikam used to work but recently stopped working. I was wondering if someone could help me work a way to resolve this issue. I've had a response from the Digikam mailing ...
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146 views

Installing libgl1-mesa-dev gives unmet dependencies

I am using Ubuntu 14.04 sudo apt-get install libgl1-mesa-dev When I try to run this command I get: The following packages have unmet dependencies: unity-control-center : Depends: libcheese-gtk23 ...
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49 views

How to cross compile the qtmultimedia-opensource-src for armhf?

Repost from https://answers.launchpad.net/ubuntu/+source/qtmultimedia-opensource-src/+question/264619 Cross I can't figure out how to build it with cross compiler (on trusty-amd64 for ...
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How can I get menu items in a Qt Quick application?

I'm using Qt Creator 3.1.1 on Ubuntu 14.10 (the version installed when you install Ubuntu SDK - the two seem to be the same application). I'm running the default Unity 7 desktop. When I create a new ...
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56 views

QAxObject: No such file or directory

I have created a QT 5 Console Application for read an xls file, but when I include QAxBase and QAxObject header files it gives me following error: error : QAxObject: No such file or directory My ...
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1answer
77 views

Qt Multimedia doesn't seem to work on Touch

Using Qt package 'Multimedia' to get cameras on the bq phone: QList<QCameraInfo> cameras = QCameraInfo::availableCameras(); cameras.size() always returns zero. Host 14.04, target 14.10, Qt ...
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135 views

How to remove in correct way qt4 development libraries?

Since I am using Qt5 stuff which installed in /opt directory and about to install Ubuntu SDK seems like Qt4 packages will be redundant in my system. Moreover I am not in need exactly Qt4 libs. So how ...
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53 views

Errors installing capybara-webkit

I'm trying to install capybara-webkit, I've installed QT already, and purged + reinstalled qt and ruby after that didn't work. Building native extensions. This could take a while... ERROR: Error ...
1
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1answer
112 views

How to cross-compile a Qt package for armhf with sbuild?

I have a Qt application that I would like to cross-compile for armhf. I've set up an sbuild chroot using the following command: mk-sbuild --target armhf trusty However, when I run debuild -S and ...
0
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1answer
122 views

Error while trying install QT4 on Lubuntu 14.04.2

I'm trying to install QT4 on my laptop that has a new installation of Lubuntu 14.04.2 but I keep getting this error dpkg: error processing archive ...
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0answers
354 views

Could not find or load the Qt platform plugin “xcb”

I am getting this error when I tried to run APK Studio in my Ubuntu 14.10 This application failed to start because it could not find or load the Qt platform plugin "xcb". Available platform plugins ...
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170 views

Unable to re-install ubuntu-desktop, or fix the broken packages required to do so

I don't know how, but somewhere along the way the package ubuntu-desktop got uninstalled from my machine. I'm starting to notice little breakages all over my system now- I can't upload photos from ...
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44 views

Can I submit my non-free closed-source Qt application to Ubuntu Software Center without providing sources?

I don't want to provide sources of my application. Can I submit it as deb package or other way?
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67 views

Unmnet dependecies while installing libglu1-mesa-dev -y for Qt OpenGL support

I am trying to finish Qt installations steps but unfortunately when I try to install libglu1-mesa-dev -y I see following problem: majer@majerPC:~$ sudo apt-get install libglu1-mesa-dev -y Reading ...
0
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1answer
269 views

Qt creator: “cannot find -lGl” Cannot install libglu1-mesa-dev

I am trying to compile and run a QT program. I have already tried windows (couldn't get taglib to compile); I also tried OSX, I compiled but the program crashes even though it doesn't crash on my ...
0
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0answers
14 views

QT on ubuntu: can not find -lGL [duplicate]

I just installed QT creator from the offline installer. Created a new project and tried building the dummy code (it was supposed to work because itw orked in windows too with msvc installed) Anyway ...
2
votes
2answers
96 views

How does one get the ambient light conditions in Ubuntu Touch?

I am planning to make an app which would switch between Light and Dark theme based on the ambient light conditions. So if it was a dark room, then the app would switch to a dark theme to reduce the ...
0
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1answer
518 views

Qt Installation requirements: unmet dependencies [duplicate]

im a linux beginner and used google & Co. by installing the requirements ( http://doc.qt.io/qt-5/linux.html ) for Qt: sudo apt-get install build-essential libgl1-mesa-dev i get the following ...
2
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2answers
186 views

QT Creator wants me to remove many programs before I can install it via Ubuntu Software Center

I've just upgraded my Ubuntu-gnome version from 14.04 to 14.04.02 and somehow I lost my QT Creator software which I commonly use to do my coding. I decided to install it again. When I tried to ...
0
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1answer
151 views

How to enable global application menu in RStudio?

On Ubuntu 15.04 Unity, how can I enable the global menu bar for the Qt application RStudio? I found a 12.04 question, which was not solved and did not contain a clue. (Due to reputation issues, I ...
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0answers
37 views

KDE 4 Strange Problem

A problem with KDE is really driving me crazy, any help would be greatly appreciated. I have a xunbuntu 14.04 on which I installed kde-plasma-desktop. There are very few styles (System settings -> ...
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23 views

install qtmobility on ubuntu

I couldn't find any good link for downloading qt-mobility packages. and I also couldn't find any good installation guide for this. the most of the links are outdated. Thank you.