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

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: ...
29
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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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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 ...
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1answer
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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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2answers
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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
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1answer
71 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 ...
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1answer
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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
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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
288 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
34 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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2answers
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“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
39 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
105 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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1answer
334 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 ...
0
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1answer
43 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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0answers
78 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 ...
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2answers
1k 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 ...
5
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2answers
10k 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
174 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 ...
16
votes
3answers
19k views

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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0answers
25 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
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1answer
428 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 ...
0
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1answer
389 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 ...
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2answers
201 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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7answers
12k 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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1answer
490 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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3answers
4k 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 ...
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1answer
194 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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0answers
58 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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2answers
348 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
5k 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 ...
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1answer
655 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?
0
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1answer
418 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
54 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
446 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 ...
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vote
1answer
204 views

How to open a browser when the TextEdit::onLinkActivated signal is received

I'd like to open a browser window to display the URL received by a TextEdit onLinkActivated signal. Is it possible to perform such call from the QML application?
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0answers
56 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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0answers
200 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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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, ...
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0answers
200 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 ...
19
votes
1answer
23k 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 ...
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0answers
475 views

This application failed to start because it could not find or load the Qt platform plugin “xcb”

In a fresh installed system(Ubuntu 14.04.2 LTS), I can run Qt5 apps(like shadowsocks-qt5, qtcreator) without this error. But after a few days of using, this error suddently occured when I ran the ...
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0answers
408 views

use qt multimedia under 15.04

Ubuntu is missing the gstreamer0.10-ffmpeg packages quite a long time now. if i install them from the ppa of mc3man i can get my Qt 5.4.1 application running on 14.10 but on 15.04 i get on error, that ...
0
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0answers
217 views

Unmet dependencies - NEED HELP!

I am using Ubuntu 14.10 with LXDE. I downloaded libopenshot 0.0.4 sources and I need to compile them. For this I need a few packages, but I cannot get one of them (qtbase5-dev). I typed in a Terminal ...
2
votes
2answers
674 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 ...
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0answers
230 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
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0answers
149 views

ubuntu-sdk showing blank spaces where icons should be

When I launch Ubuntu-SDK in Ubuntu 14.10 (64-bit) every Qt Creator aspect works normally except all the content that was specifically added by canonical. This is especially annoying in the 'Welcome' ...
0
votes
1answer
178 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 ...
5
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2answers
10k 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 ...
3
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0answers
455 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 ...