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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Can I run any other display server on Ubuntu Core, except for MIR?

What are the options to run QT applications on Ubuntu Core ? Should I use docker or are there snapcraft frameworks available for using EGLFS or Xorg ? The hardware platform that I am using is Intel ...
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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 ...
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record float variable in sqlite

My sqlite db has a table and I want to record a Float variable in my database but after execution my command just records a square in the table. QString new_table = "logs_2"; qry_table.exec("CREATE ...
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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 ...
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58 views

Problems with qt library after update to ubuntu 15.10 from 15.04

After updating the os, some programs like vlc and texmaker don't work anymore. texmaker gives me following error: texmaker: symbol lookup error: /usr/lib/x86_64-linux-gnu/libpoppler-qt5.so.1: ...
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QtCreator how to install “Uncrustify” C++ Beautifer?

QtCreator (3.0.1, Ubuntu 14.04 LTS) allows the installation of C++ code Beautifier "Uncrustify", for reformatting existing code. This all looks simple from instructions ...
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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 .. ...
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Ubuntu freezes with Qt App

Im trying to develop a Qt app in Ubuntu and sometimes (no different set of loaded resources between runs, and just Qt resources, like QThreads or QtGui), when running it, it just freezes the system... ...
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Is it bad to have Qt apps on a GTK evironment?

I'm using Xubuntu 14.04, it has XFCE environment, GTK3 engine and themes, and all my apps use GTK. But I would like to use a particular program (spyder) that demands Qt. Is it bad to have Qt apps on a ...
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42 views

How to remove a specific package from dependency list of another package?

Since I'm using Qt5 I want to uninstall all the qt4 libs. I tried it with the following command sudo apt-get remove libqt4-* which attempts to remove all the qt4 libs but in addition it wants to ...
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data is missing while writing into a file in Ubuntu

I am using UBUNTU 14.04 LTS. I am coding GUI program with QT creator,for MIL-STD-1553 communication.I am saving the Data what ever sending the data to RT(Remote terminal)from BC(bus controller) in a ...
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67 views

Where (directory) to install Qt?

I am mainly a Windows user, but need to install Qt/QtC for testing purposes under Ubuntu 14. After downloading the installer (as described here: https://wiki.qt.io/Install_Qt_5_on_Ubuntu ) it wants ...
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15 views

Use Program made in qt to run on linux instead of windows

I have a program that is distributed for both Windows and Mac. Earlier I found out that it is made using qt creator. Is it possible to somehow use qt to make the program run on linux without using ...
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1answer
38 views

Application (Qt Creator) is unresponsive on launch, even after reinstalling

When I try to open Qt Creator, it loads fine but after a couple of seconds, the application window becomes unresponsive and turns gray. I can move the window around, but cannot interact with it. It ...
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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: ...
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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. ...
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28 views

How to get the name of connected ios phone in Linux using command

How to get the name of connected ios device name in Linux, or c++ programming. basically, I use the Qt in Linux. and I want to get the name of the connected device name. after a searching in google we ...
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Can't change version of Qt

I am trying to use Qt5.4, but when I write in console qmake --version only appears: Using Qt version 5.2.1 in /usr/lib/x86_64-linux-gnu I already install Qt 5.4, in another folder, but ...
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2answers
78 views

How to add element for QML ListModel using Javascript?

I have created one nested ListModel. ListModel { id: mainModel ListElement { mainName: "Alphabet" subAlpha: [ ListElement { alphaName: "A" }, ...
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Ampps warning Cannot mix incompatible Qt library (version 0x40806) with this library (version 0x40805) on kubuntu

I installed ampps in kubuntu 64 bit. When I tried to start ampps by sudo ./Ampps, I got the following error Cannot mix incompatible Qt library (version 0x40806) with this library (version 0x40805)
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1answer
322 views

Installing Qt 5.5.1 on Ubuntu 14.04 - throws qt.network.ssl error on terminal

I am planning to install qt 5.5.1 on my ubuntu 14.04 running on virtual machine. I have downloaded the installer from qt-io and when I try to install the setup, I notice the below warning on my ...
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1answer
47 views

Add image files in Ubuntu QML app with C++ plugins (qrc)

I'm writing an Ubuntu QML (phone) App with C++ plugins using ubuntu-sdk. My app includes a png image and in order to include the image in the binary (so it shows on the phone) I have created a qrc ...
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1answer
38 views

Applications refuse to start; “Could not load QT plugin ubuntumirclient”

I have been trying to build applications from the source and they compile perfectly. But when I go to run them, I get this error: This program failed to start because it could not find or load the ...
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66 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 ...
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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: ...
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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. ...
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1answer
99 views

I have installed QT4.8.7 but CMAKE codul not match the path

I got the error message CMake Error at /usr/local/share/cmake-3.4/Modules/FindPackageHandleStandardArgs.cmake:148 (message): Could NOT find Qt4 (missing: QT_QTOPENGL_INCLUDE_DIR ...
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29 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: ...
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1answer
100 views

missing dependencies for qtdeclarative-dev:i386 on Ubuntu 64 bit 14.04.3

I want to install the 32 bit qt libraries on ubuntu 64 bit, but apt-get can not resolve the dependencies. first I ran: sudo apt-get update sudo apt-get upgrade sudo apt-get dist-upgrade Then I ...
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1answer
45 views

Moto G not listed by Qt Creator / adb after upgrading to 15.10

I developed happily with my Moto G on Ubuntu 15.04 a while ago. I upgraded to 15.10 and now that I tested it again Qt Creator (official 5.5 SDK) doesn't see the device anymore. Developer mode and ...
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43 views

VLC 2.2.1 using Qt dialog

When I upgraded from 15.04 to 15.10, this included a new version of VLC, as well as a newer Qt. VLC now uses the Qt file open dialog, but I want the GTK one back. I have already checked VLC themes and ...
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89 views

LibQt4-core has unmet dependencies

I'm trying to install libqt4-core, but it seems that for the dependencies, I have more recent versions than are compatible with this package. When I use sudo apt-get install libqt4-core my output is ...
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79 views

VirtualBox and Skype are bad rendered after sometime

In Ubuntu 14.04 and 15.10 with A10 (Radeon HD7660) and Intel i5 (Integrated Graphic) respectability, the ui of VirtualBox and Skype are not rendered rightly after sometime. I researched and ...
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1answer
402 views

Where is the Qt Maintenance Tool?

I've installed QtCreator in Kubuntu 15.10 through apt-get and it say my computer doesn't have the required Qt Kit and can be installed through Qt Maintenance Tool. But I don't think I have Qt ...
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Why did Canonical choose to use the Qt toolkit for Ubuntu Touch and not Gtk? [duplicate]

I recently came across a question on Quora: What are future plans for Gtk? Is there plan for smartphone or tablet? Gnome focus on touch devices but Gtk software can not run on it? On Quora, ...
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1answer
73 views

Qt based apps are broken after time

I'm using Kubuntu 15.10 with Plasma 5 about 2 weeks. It has been a few updates, but the problem is still, and it prevent to work normaly. I don't know what problem is it, but this happens only with ...
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Qt installation error?

I used wget to download the latest Qt (still pretty new to linux, sorry) Page wget http://download.qt.io/official_releases/qt/5.0/5.0.2/qt-linux-opensource-5.0.2-x86-offline.run Now I proceeded ...
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77 views

No valid kits found, although a kit exists

I'm trying to open a new project in Qt Creator, and I'm getting a "No valid kits found" error. In options I do see a kit configured. I tried this and installed gcc from the maintaiance tool (although ...
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2answers
156 views

QT interfaces broken

I ran into a strange issue a couple of days ago and i have no idea what to do. Some of my programs interfaces seem to be broken recently. It is rather odd because i haven't done any major updates. It ...
0
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1answer
25 views

U1db-Qt not working as expected in ListView (Ubuntu Touch App Development)

Recently, I've been trying to learn how to use the U1db Library (if that's what you call it), but it hasn't been working the way I expected it to work. Here is my code: import QtQuick 2.4 import ...
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1answer
284 views

Qt version is not properly installed

Qt Creator says that Qt 5.4.2 is not properly installed. I installed the qtcreator package from the Ubuntu repositories. What can I do about it?
2
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1answer
64 views

Ubuntu 14.04 latest update Beyond Compare and TortoiseHG issues

After updating to the latest (as of Nov 1, 2015) Ubuntu 14.04 packages, the UI appears broken on Beyond Compare and TortoiseHG. Most items aren't visible and the when I move the mouse over the window, ...
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2answers
430 views

Upgraded to Ubuntu 15.10 Wily and get QNativeImage: Unable to attach shared memory segment

I just upgraded to Ubuntu 15.10. I am still using the latest NVIDIA binary driver 352.41 from nvidia-352 w/ GT730 card. When I start spyder and spyder3, the display is garbled with window elements ...
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74 views

update to 15.10 breaks qt apps

After upgrade to 15.10 my qt apps are unusable, creating new user doesn't help, what could be wrong ?
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104 views

How to setup Qt to use blueZ bluetooth stack

I am running btscanner demo in Qt Creator 5.5 but the 'scan' button comes out as disabled perhaps because the bluetooth is not setup right for Qt. I am using Ubuntu 14.04 (virtual machine) and I can ...
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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 ...
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1answer
51 views

CPP problem / Qt IDE

When trying to install Qt IDE this msg appears : The following packages have unmet dependencies: g++: Depends: cpp (>= 4:4.8.2-1ubuntu6) but 4:4.8.2-1ubuntu6 is to be installed Depends: gcc ...
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2answers
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:-1: error: The Qt version is invalid: qmake does not exist or is not executable

When I do deploy to Ubuntu device debug I get the following message :-1: error: The Qt version is invalid: qmake does not exist or is not executable
2
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1answer
87 views

Pure Qt application (QML/QtQuick) on Ubuntu Phone?

I have a Qt application that is based on QML/QtQuick and runs, among other platforms, on Android. Is it possible to compile this application without (major) modifications for Ubuntu phone? If yes, ...
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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), ...