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 ...
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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 ...
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2answers
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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
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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?
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2answers
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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),...
0
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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 ...
2
votes
1answer
321 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 ...
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2answers
655 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 ...
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0answers
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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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1answer
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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
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1answer
380 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 ...
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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
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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 ...
0
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1answer
375 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 ...
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 ...
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 ...
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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 ...
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0answers
197 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 ...
0
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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 ...
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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 ...
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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 ...
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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 ...
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2answers
462 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 ...
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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....
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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 ...
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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... ...
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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....
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2answers
944 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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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:...
0
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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-...
0
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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
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1answer
767 views

Unable to install QT5 .run file on ubuntu

I know that to install .run files, I need to do chmod +x qt.run ./qt.run But it seems the ubuntu is not trying or able to run the executable. I even tried appending the sudo but it doesn't work. ...
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1answer
70 views

Deploy application with Qt5 to 12.04

I need to deploy my application which is depend on Qt5.x. No problem with that on 14.04+, but for 12.04 users there is seems to be no way to get qt5 from standard package repository. I'd like to pack ...
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0answers
1k views

Getting error: Unknown module(s) in QT: webkitwidgets in QT 5.2.1 in Ubutu 12.04

I have built Qt 5 libs from source into Ubuntu 12.04 and made a Qt test app. In .pro file I have written QT += core gui webkitwidgets to use Qwebview in my test project. But when I run qmake into Qt ...
2
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2answers
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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-...
2
votes
0answers
61 views

How to make an online, offline app with cache

I just wanted to know how I can do this. For example, I want to have an app that's linked to a WordPress site and when I'm connected to the internet, I want see everything normally, but when I'm not ...
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254 views

Ubuntu web browser not loading in 14.04

I am on Ubuntu 14.04.2 32 bit platform. When I launch ubuntu web browser GUI window opens but it's white empty. I launched it in terminal /usr/bin/webbrowser-app it's the same, it only prints: /...
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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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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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276 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
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?
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2answers
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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 ...
2
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2answers
924 views

QML app with C++ plugin (cmake) adding resource file

How to add qrc file to "QML app with C++ plugin (cmake)" project ? I can't find a working instruction. I found only one thing, add this to CMakeLists.txt: qt5_add_resources(RESOURCES modules/...
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votes
0answers
318 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 "...
0
votes
1answer
261 views

how to build simple program run from terminal in ubuntu [duplicate]

I'm writing simple program in c++ using netbeans. I want it should be executable thru ubuntu terminal as other do like "php samel.php" it works I want something like this please guide me how to do ...
3
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661 views

Simple OpenCV program crashes

I am currently having a problem. I am following the instructions given in this book "OpenCV 2 Computer Vison Application Programming Cookbook" for creating a simple image display program in OpenCV (2....
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2answers
3k views

Qt 5.4 supported .so files come with default Ubuntu 14.04 LTS Trusty or not

I am able to make deb file of Qt 5.2.1 app but not Qt 5.4 app in Ubuntu 14.04 LTS, 64 bit. I have seen that Qt .so files present at the path /usr/lib/x86_64-linux-gnu/ are Qt 5.2.1 compatible not ...
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1answer
256 views

No option for C++ in Qt Creator (for project)

I've installed the Qt 5.4.0 for Linux 64-bit (542 MB) on gnome ubuntu 14.04, When I started new project, I couldn't find the "Qt C++ Application" tab. There is option for C,QT,BLACKBERY....... But no ...
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Broken QT5 packages are in release 14

Fresh Ubuntu 14.04 install. Tried this on two different machines. Same problem: tstimac@promel:~$ sudo apt-get install build-essential qmlscene qt5-qmake qt5-default qtdeclarative5-dev ...