Qt 5 is the 5th major version of the popular GUI toolkit for implementing graphical applications. This version contains major changes, and Qt Quick is central to it.

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ListView model reload with U1db.Query

I have a ListView with his model coming from a U1db.Query The reading and saving operation form U1db works, but i need to update the ListView model when a new item is inserted in the database, to ...
2
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1answer
4k views

Recent Qt repository

Is there any repository for latest Qt versions (recent version is 5.0.1 while ubuntu has 4.8) ? PS I found this PPA but it tagged as [deprecated]!!!, so I'm wondering what if there is official one ...
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3answers
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How can I install Qt 5.x on 12.04 LTS?

If you want to develop with QML 2.0 and Qt5, the base packages don't seem to exist in repository for 12.04. What PPA should I add? Is it a binary installer? a compile the toolkit yourself? Those ...
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votes
1answer
60 views

libqt5webchannel.so.5 missing or not found in Ubuntu 16.04

I am trying to create deb of QT 5.5 app which uses QT5 webkit and webkitwidgets in it. When I am trying to create deb with command "debuild -kMYGPGKEY" then it gives me below error. /usr/bin/ld: ...
2
votes
1answer
67 views

kdevelop not finding qt libs

Currently I am trying to create a brand new project using KDevelop 4.7.3. I am also targeting Qt5. When I attempt to create a new project using the template for a Qt Gui project it creates a Qt4 ...
0
votes
1answer
42 views

Qtbase5 installation modified graphics significantly

I was trying to apply a patch, which has been a problem because information on this subject is very limited. I use Kubuntu 16.04 LTS, by the way. For some reason I thought that the package to be ...
1
vote
2answers
68 views

Problems installing on terminal, I keep receiving a “E: sub-process /usr/bin/dpkg returned an error code (1)”

I have recently installed Ubuntu and I am a Linux noob. Initially all was fine and installations worked as instructed in various threads. I have now encountered a problem while trying to download an ...
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0answers
22 views

Which Qt5 interface settings match the default Ubuntu 16.04 design?

I would like to set the interface settings for Qt5 to match the default style for Ubuntu 16.04. How should the settings be defined in the below dialog window?
26
votes
3answers
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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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8answers
13k views

How do I install Sigil?

Is there a ppa I can use to install Sigil in Ubuntu? The old ppa:rgibert/ebook doesn't work for me any more.
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2answers
74 views

Qt5 apps won't open on one computer

There is a Qt5 app (Musescore), that I am trying to get to work on my second Ubuntu computer. On my main computer (Lubuntu 16.04), Musescore works fine, but on my second computer (also Lubuntu 16.04),...
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vote
2answers
654 views

How do I install the Declarative module for Qt5 in Ubuntu 16.04?

In the pro file I have the following line. QT += core gui quick widgets quickwidgets declarative sql When running qmake I get the following error. error: Unknown module(s) in QT: declarative I ...
2
votes
1answer
319 views

Cannot compile Qt 5.6.0 mysql plugin in Ubuntu 16.04 LTS - 64bit

I've recently upgraded both Qt to version 5.6.0 and my Ubuntu workstation to version 16.04 LTS. Now, I know I have to recompile mysql plugin and I've successfully done it several times. However, I had ...
2
votes
1answer
4k 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 ...
2
votes
3answers
13k views

“Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed

I wrote application for linux which uses QT5. But when I am trying to launch it on the linux without QT SDK installed, the output in console is: Failed to load platform plugin "xcb". Available ...
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0answers
40 views

Installing Qt4.8.7 without installing any version of Qt5 in Ubuntu14.04?

I need to install just Qt4.8.7 on Ubuntu 14.04. I compiled qt-everywhere-opensource-src-4.8.7, but qt5 is also getting installed with this. Can i stop it to install qt5 libraries?
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votes
1answer
46 views

qt5 error on setting the CMAKE_PREFIX_PATH

Why am I getting this error -bash: syntax error near unexpected token `CMAKE_PREFIX_PATH' on running this command kv@kv:~/catkin_ws$ set(CMAKE_PREFIX_PATH $ENV{HOME}/Qt/5.5/gcc_64)
2
votes
2answers
699 views

Zeal from the PPA has unmet dependences

I'm trying to install Zeal through ppa in Ubuntu 13.04, but is giving the error: The following packages have unmet dependencies: zeal : Depends: libqt5core5 (>= 5.0.2) but 5.0.1+dfsg-0ubuntu4.1 ...
2
votes
1answer
353 views

Change QT5 theme

I am using i3wm on Ubuntu 15.10. I was wondering on how to change the QT5 theme? With old QT4 it was possible to change it with qt4-config. There is however no qt5-config as of yet. I have tried using ...
4
votes
0answers
151 views

How to integrate Qt software like FocusWriter, Telegram, Toggl Desktop or RStudio?

What is required to integrate Qt applications such as FocusWriter, RStudio, Toggl Desktop or Telegram Desktop into the design of Ubuntu? By default, these applications look as follows on Ubuntu 16.04:...
2
votes
1answer
376 views

ImportError: No module named 'PyQt5.QtWebEngineWidgets'

I try to run a python script using PyQt5 QtWebEngineWidgets but it throws errors: from PyQt5.QtWebEngineWidgets import ( ImportError: No module named 'PyQt5.QtWebEngineWidgets' I think there is a ...
5
votes
2answers
13k views

Ubuntu 14.04 QtCreator Qt5 examples missing

After upgrading to Ubuntu 14.04 I removed the official qtcreator in order to install the modified version from the software center because I'd like to try the SDK. Fortunately, the docs are now ...
28
votes
1answer
30k views

How can I uninstall Qt5 that I installed from .run?

I installed Qt from qt-linux-opensource-5.0.1-x86_64-offline.run file. It works fine, but I am unable to use KDE libs in it. So can anyone please say how to uninstall it?? I could also not find any ...
3
votes
4answers
8k views

How to Update Qt 5.4.1 to Qt 5.5?

I want to update qt 5.4.1 to Qt 5.5 or 5.4.2 because I want to test KDE Plasma on WayLand. Note: Please provide solution that consume least network resources as I have limited bandwidth. KUbuntu 15....
2
votes
1answer
902 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 ...
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2answers
2k 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 ...
3
votes
0answers
2k views

Installing QT 5.5 On Ubuntu 14.04 LTS with error : QSslSocket: cannot resolve SSLv2_server_method [duplicate]

I've Downloaded qt-opensource-linux-x64-5.5.0-2.run file and tryed to install it using terminal, so I added execute permission and run it: ./qt-opensource-linux-x64-5.5.0-2.run But it shows: qt....
5
votes
2answers
2k views

Error: PyQt5 requires Qt v5.0 or later

I want to install PyQt5 on Ubuntu 14.04.2. Once downloaded and uncompressed, I run python configure.py as it is mentioned on the previous link. However, it asks me to install QT 5 or later. Which ...
0
votes
1answer
3k views

Default installation prefix QT5 / QT5 Widgets Ubuntu

I have a CMake project. I am trying to switch from QT4 to QT5. find_package(QT5Widgets REQUIRED) EDIT HERE IS A TYPO problem solved (Qt5... instead of QT5...) already gives me By not providing "...
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votes
2answers
18k views

What package do I need to build a Qt 5 & CMake application?

I'm trying to build sdrangelove, which wants Qt 5 and uses CMake for its build system, on Ubuntu 13.10. What package do I need to install to give it the file it's asking for here? There are a lot of *...
0
votes
1answer
374 views

Ubuntu Qt 5.5.1: error Cannot find -lGL

I have developed an GUI application on Qt 5.3.1. I am using Qt Creator 3.1.2 (based on Qt 5.3.1) to build my GUI application and am able to build and deploy my application successfully. I wanted to ...
6
votes
1answer
12k views

Ubuntu 14.04 Qt5 development libraries?

I want to build applications requiring Qt5 via CMake. Which libraries do I have to install to achieve that? What I have tried so far is searching for anything containing qt 5 core and dev, but have ...
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0answers
16 views

libGL.so running Qt Application draw colored polygons

qt application I have fglrx installed on Ubuntu 14.04. Programs run fine. Steam games are working. But when I try to open a Qt-App, it draws this colored polygons instead of interface. This program ...
0
votes
1answer
359 views

“error: cannot find -lGL” in Qt creator 5.5.0 on Ubuntu 14.04 LTS

I am trying to build and run a sample program on Qt creator 5.5.0 and Ubuntu version is 14.04 LTS. Every time its giving an error cannot find -lGL and id returns exit 0. I tried to resolve this ...
0
votes
1answer
89 views

Unable to install qt5.5 from git in Kubuntu 14.04.3?

I tried to install qt5.5 from git and after doing the following git clone git://code.qt.io/qt/qt5.git -branch5.5 cd qt5 ./init-repostiory ./configure I am getting the following error: You ...
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votes
1answer
169 views

Graphic driver error

When I run my Qt app I get the following error: libva info: VA-API version 0.35.0 libva info: va_getDriverName() returns 0 libva info: Trying to open /usr/lib/i386-linux-gnu/dri/vmwgfx_drv_video.so ...
0
votes
1answer
96 views

Style won't load for Ubuntu SDK apps

I have recently performed a fresh install of Ubuntu 15.10. However, the preinstalled webbrowser-app's look is corrupted. I have found out that the style is not loading, however I can't solve this ...
0
votes
0answers
196 views

Qt Creator 3.5.1 running slowly in Ubuntu 14.04

I recently installed Qt Creator 3.5.1 on Ubuntu 14.04 LTS and it freezes for several seconds every once and a while (e.g., while editing text). Is this a known problem? How can I go about debugging ...
2
votes
2answers
3k views

where is qt5 designer

I updated an Ubuntu 12.04 machine to 14.04. The 12.04 install just had qt4, and had /usr/lib/x86_64-linux-gnu/qt4/bin/designer The 14.04 install has qt5, but I cannot get a /usr/lib/x86_64-...
8
votes
2answers
18k views

Qt5 installation and path configuration

I have installed Qt5 from the Qt5 project site, to the following directory /opt/Qt5 I would also like to mention that I had Qt4 installed previously, I have removed all instances of Qt4 through ...
0
votes
1answer
385 views

Python3 + ipython + pylab on Ubuntu 14.04

I really want to switch to Python 3, but Ubuntu 14.04 makes it difficult to do so when using the IPython+pylab framework. My settings: I have installed most of the important packages using pip rather ...
0
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0answers
29 views

Question mark at left side pane.Ubuntu compatibility

I had implemented an gui in Qt.I need the guidance for the below one... At present while running my project the application shows the default icon that is having question mark(?) symbol. How to set ...
0
votes
1answer
756 views

Opengl for Ubuntu14 (building QT 5.4)

I have a fresh install of Ubuntu 14 LTS from this morning, I am using a PC with Nvidia graphic cards and I have successfully installed the latest version of the driver from the Nvidia website (NVIDIA-...
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vote
2answers
460 views

Cannot compile Qt 5.5.1 mysql plugin

I have system with Kubntu 15.10 and yesterday I've ugpraded Qt version to Qt 5.5.1 Opensource via its MaintenanceTool. Today I've installed mysql development package via sudo apt-get install ...
0
votes
1answer
721 views

How to show the menus for a window in the window's title bar in KDE Plasma 5

I installed both the 'appmenu-qt' and 'appmenu-qt5' packages on a fresh install of Kubuntu 15.04. Then I looked in 'System Settings > Application Style', but found no options to enable the appmenu. ...
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vote
1answer
316 views

Ubuntu 14.04.3 qtbase5 dependencies problem, is this a bug?

I want to install qtbase5-dev, but this will delete many *-vivid packages. sudo apt-get install qtbase5-dev Reading package lists... Done Building dependency tree Reading state information... ...
0
votes
0answers
97 views

Missing images from Qt Creator examples

I installed in Qt creator (3.0.1 based on Qt 5.2.1) the examples by running sudo apt-get install qtbase5-examples qtbase5-doc-html The examples have been installed, but I can't see any images of ...
1
vote
2answers
943 views

How to perform Qt installation

I downloaded qt-opensource-linux-x86-5.4.1.run but how to install it on ubuntu 14.04LTS? This is the output which I get: administrator@pc-7:~$ cd /home/administrator/Downloads/FlareGet/Applications ...
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2answers
7k 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 /usr/lib/...
1
vote
1answer
1k views

How to install Qt5 X11 Extras module in Ubuntu 12.04?

For my build on travis CI I need qt5 x11extras addon. I tried to add ppa:ubuntu-sdk-team/ppa but cmakes find_package(Qt5X11Extras REQUIRED) still fails. Where the heck does ubuntu hide the qt stuff?