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

11
votes
0answers
178 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 ...
4
votes
0answers
229 views

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 ...
3
votes
0answers
91 views

How to integrate the design of Qt software such as FocusWriter, Telegram, or RStudio?

What is required to integrate Qt applications such as FocusWriter, RStudio, or Telegram Desktop into the default GTK environment? Without having changed anything, those applications look as follows: ...
3
votes
0answers
425 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 ...
2
votes
0answers
49 views

How to stop Unity on the phone so it doesn't restart?

How to bring down the Ubuntu Phone GUI so I can test some Qt stuff? I figured that it's easy to put arbitrary Qt versions into home dir and run them without messing with the main installation. But I ...
2
votes
0answers
421 views

Unable to compile 32 bit Qt 4.8.6 libraries on 64 bit machine

I am trying to build 32 bit Qt 4.8.6 libraries on Ubuntu 14.04. I have installed additional libraries sudo apt-get install libx32gcc-4.8-dev sudo apt-get install libc6-dev-i386 sudo apt-get install ...
2
votes
0answers
37 views

Windows that start out maximized restore to an application-specific size, not always a good one

I don't know that this is an OS-specific thing, a bug in the various UI toolkits in use, or purely application-specific, but the inconsistency is mildly infuriating - enough, at least, to get me to ...
2
votes
0answers
633 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 ...
2
votes
0answers
49 views

Can't start ubuntu-sdk

On Ubuntu 14.04.1 LTS 64 bit, I did: sudo add-apt-repository ppa:ubuntu-sdk-team/ppa sudo apt-get update && sudo apt-get install ubuntu-sdk sudo apt-get update && sudo apt-get ...
2
votes
0answers
70 views

How to force use of “overflow menu” for actions on header bar?

I am using header actions in my Ubuntu SDK app, but I would like to avoid clutter on the header bar. I have noticed that the Android-style "overflow menu" autocreates itself after a certain number of ...
2
votes
0answers
238 views

Font hinting problems in Dropbox, other Qt applications

I'm using Ubuntu 14.04 and font hinting works perfectly as usual, except for a couple of applications: Dropbox's preferences and Dwarf Therapist. Since they are both Qt apps, I figure that's where the ...
2
votes
0answers
784 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 ...
2
votes
0answers
648 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 ...
2
votes
0answers
154 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
0answers
399 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 ...
2
votes
0answers
292 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 ...
2
votes
0answers
460 views

After compiling QT 5 how do I to update my system? With update-alternatives?

I'm on Ubuntu 12.04. I followed the instructions in this guide in order to compile QT5. Everything compiled fine. My problem now is that my QT related programs are still pointing to an older ...
2
votes
0answers
579 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 ...
2
votes
0answers
575 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 ...
2
votes
0answers
224 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 ...
2
votes
0answers
233 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 ...
2
votes
0answers
1k views

When I install Xubuntu 12.04, the Qt-applications font is horrible

What is the proper way to set up fonts in Skype, VLC, and so on?
1
vote
0answers
28 views

could not find or load the Qt platform plugin “xcb” in ubuntu-sdk

Command: $ ubuntu-html5-app-launcher --www=www Error: This application failed to start because it could not find or load the Qt platform plugin "xcb". Reinstalling the application may fix ...
1
vote
0answers
16 views

Error loading libQt3Support.so.4

I am trying to install this software called Vlab. Its a Plant modelling software. I am following their instruction to install their software. After that if i run the command vlab-splash which ...
1
vote
0answers
38 views

KF5ServiceConfig.cmake not found when building Shashlik on Ubuntu 14.04 LTS

I cloned all the sources here except for installing dependencies (because the instructions are for OpenSUSE). I only installed QT5 , QT CMake and Extra CMake Modules. But when I run cmake .. ...
1
vote
0answers
28 views

lots of symbol lookup errors in dynamically linked libraries

I'm using Ubuntu 15.10 Problem: For some days now I have been getting Errors like this when opening some applications: /usr/lib/x86_64-linux-gnu/libpoppler-qt5.so.1: undefined symbol: ...
1
vote
0answers
19 views

QtCreator scrolling bug

I've already asked on the Qt forum, but apparently Ubuntu users aren't there. Steps to reproduce: Place the cursor somewhere. Scroll down with a mouse wheel so the cursor is not in sight any more. ...
1
vote
0answers
64 views

qt apps stopped inheriting gtk themes

After a fresh installation of Ubuntu Gnome 15.10, qt apps like qpdfview or QuiteRSS suddenly stopped to inherit the global gtk theme, in my case Numix. The same is also true for the default Adwaita ...
1
vote
0answers
35 views

Using qt debug symbols from ppa in qtCreator

How to make use of debug symbols in qtCreator, that are installed using ppa? I use Stephan Binner "Qt 5.5.1 for /opt Trusty" packages, including packages with -dbg postfix. Running command: ...
1
vote
0answers
132 views

QT Creator missing help files?

I have downloaded the offline installer for Qt 5.5.1 for Linux 64-bit. Whenever QT Creator starts, an error message appears saying that the Help cannot be loaded. ...
1
vote
0answers
26 views

Can't Create Debian Package for QT App

I can't create package. I was try to create with this tutorial. Error is when I write the last one command: pdebuild --debbuildopts -sa Errors: parsechangelog/debian: warning: ...
1
vote
0answers
49 views

ubuntu-sdk mkspec

I followed instructions in Ubuntu SDK to install the IDE. No problem. I can write an app and run it in the desktop, but not in my Ubuntu BQ 4.5. The kit is wrong and several errors appear: "Mkspec not ...
1
vote
0answers
169 views

non-GTK style broken in QT5 applications after ibus, gir, dconf install

I installed IBUS and its dependencies. The following is an extract of /var/log/apt/history.log. Start-Date: 2015-10-31 14:43:54 Install: gir1.2-atk-1.0:amd64 (2.16.0-2build1, automatic), ...
1
vote
0answers
41 views

Trying to install KISS IDE on Ubuntu, Qt5 and cmake problem

The KISS IDE is an IDE used for programming, compiling, and exporting code/executables to a device called the KIPR link. http://www.kipr.org/products/kiss-ide https://github.com/kipr/kiss It is ...
1
vote
0answers
1k views

Really installing PyQt4/5 for python 3.4 on trusty

I am using Python 3 on my ubuntu 14.04.2 (trusty), along with Python 2. I am trying to run ipython --pylab, but with Python 3, this fails (works well with Python 2). It fails since it needs QT4/5 or ...
1
vote
0answers
345 views

Trouble with Qt libraries while installing Gnu Octave 4.0.0 from source

I know that similar problems to this have arisen. I have tried all of the debugging techniques that I have heard of. I have made sure to download all of the dependencies for Qt4 from the following ...
1
vote
0answers
323 views

Problem using qmake with Qt3Support

I am using Ubuntu 14.04.2 LTS on an x86_64 cpu. I try to create a Makefile using qmake with the flag QT += Qt3Support, but I get the answer "Project ERROR: Unknown module(s) in QT: Qt3Support" I ...
1
vote
0answers
23 views

How can I specify a Qmake file during packaging?

I'm trying to package a piece of software that I wrote for Debian/Ubuntu. I've read that dh supports Qmake natively. However, my .pro file is not in the root directory of the source tree, but rather ...
1
vote
0answers
21 views

What is the correct way of using Qt 5.4 in my .deb package?

I want to create a .deb package for an application that I am working on, which depends on Qt >= 5.4 For some supported versions of Ubuntu this version is not available except via packages from a ppa. ...
1
vote
0answers
178 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, ...
1
vote
0answers
460 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/ ...
1
vote
0answers
196 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 ...
1
vote
0answers
140 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 ...
1
vote
0answers
713 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 ...
1
vote
0answers
331 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 ...
1
vote
0answers
39 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 -> ...
1
vote
0answers
203 views

How to run Qt app compiled&linked with Qt 4.8.4 on a system with integrated Qt 4.8.6

I wrote an application using Qt 4.8.4. Now I purchased a new PC and installed Kubuntu 14.10 based on Qt 4.8.6. To develop my application, I built Qt 4.8.4 from source using make install and that went ...
1
vote
0answers
625 views

qmake could not exec error while building Qt from source

I'm having an issue building QT from it's sources. I have to build from sources due to a strange requirement (that's how we are going to do it at work, once we start using QT). Building from sources I ...
1
vote
0answers
65 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 ...
1
vote
0answers
212 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 ...