The docs mention how to include and link qtmultimedia:
https://doc.qt.io/qt-5/qtmultimedia-module.html#details
but looking at the maintenance tool:
there don't seem to be any intuitively named libraries. Where is qtmultimedia?
QMultimedia first beta has just been release at qt 6.2. source.
You do not have to dowload further qt extension.
If you want to use it, you have to include QMultimedia and add the following code into qmake: QT += multimedia
Related
I've found out that XmlListModel QML element resides in qtdeclarative git submodule and that to include it in the build I need somehow to enable xmlpatterns module of Qt (according to qtdeclarative/src/imports/imports.pro file). The question is how do I do that? The answer should definitely be simple and obvious but Google doesn't give it among the most popular results.
just add framework in you .pro file:
QT += core xml xmlpatterns
I am new in Qt framework and now, I want to create an app which supports multi-language display. I known there is a way to do: Qt Linguist. I searched, and archieved some information about lupdate, lrelease ... But I just have Qt Creator IDE, how can I run or compile lupdate, lrelease ???
How can I create *.ts file ?
Please give me some code example or guide to do. (I often use Qt Designer to create GUI)
As far as i know, there is no option in QtCreator to use QtLinguist - you have to do it manually. Here you have an excellent documentation about how to do it. I have learned from there also.
I include this library:
#include <QtCopyDialog>
When i compile, i see this error
"QtCopyDialog: No such file or directory"
How to solve this problem?
Thanks.
QtCopyDialog is not part of the core Qt library, but was released as part of Qt Solutions, a now discontinued add-on. The official Qt site links to a newish Git repository containing a few of the original Qt Solutions classes. This appears to be the most (only?) maintained location for the Qt Solutions source, but QtCopyDialog appears not to have made the grade. The only place I can find the source for QtCopyDialog is here. Judging from the docs, the last time it was maintained was pre Qt 4.5. You might need to make some changes in order to get it to work with whatever version of the Qt libs you're using.
I am new to Qt and I have problem. I downloaded Qt SDK for Open Source C++ development from http://qt.nokia.com/downloads/sdk-windows-cpp, I add C:\QT\2010.05\bin in my PATH. When I start some demo projects it works, but when I create same project (I create a new project and copy the source code from the demo) it shows an error like "QGLWidget cannot be found" (I need to create an OpenGL project). Do I need to add anything else to my PATH? Does anybody know what could be the problem?
Edit your .pro file and add opengl as an option to QT:
QT += core gui opengl
You need to add the OpenGL module in your project file (.pro) as explain in the doc: http://doc.qt.io/qt-5/qtopengl-index.html#details
From Qt 6, you need to use cmake to access this. This is how you would do it:
find_package(Qt6 REQUIRED COMPONENTS OpenGL)
target_link_libraries(mytarget Qt::OpenGL)
For Qt 6+, add QT += openglwidgets instead of opengl, as per the documentation.
Since I am very UNHAPPY with Visual Studio (It's just Junk!) I am trying to use Qt Creator, which seems to be the solution for my c++ projects to get easily run in my Mac also.
But I am using OpenCV. So, How do I set libraries in Qt?
(include folder and maybe some libs)
I am trying with this app:
http://www.qt-apps.org/content/show.php/Qt+Opencv+webcam+viewer?content=89995
But getting many errors since Qt does not know where to find the libraries, where should I enter the paths or something?
Help will be very well appreciated.
Ignacio
I think I have answered 2 Qt questions that recoup what you are asking :
The first answer is about OpenCV integration in Qt: OpenCV with other GUI (like Qt or WxWidgets) on Win32 VC++
And the second about using 3rd party libraries in Qt: How do i reference the qjson.dll file from my qt project?
I know that this is an old thread but this answer might help anyone on unix trying to link to OpenCV 2.3.1 +
It is actually quite simple with pkgconfig. All you have to do is in your qmake file *.pro add the following:
unix {
CONFIG += link_pkgconfig
PKGCONFIG += opencv
}
Thats it if you are on a unix based system.
Warning, the answers above are deprecated & misleading. Just set up your project with CMake, just like opencv 2.x itself is. Then you just set CMake to add $OPENCV_LIBS as a library to link to and you're done. In qt creator, file-->open project and open the CMakeLists.txt file, presto.
Don't use qmake or pro files unless you really want a QT gui. Even then, look at the QT samples in opencv 2.2+ first, I think they use cmake to handle the qt interface.
Partial answer to myself:
See qmake project files, declaring other libraries.
But I think I will have to compile OpenCV for Linux as I don't think opencv.framework will work with LIBS.
Is there any variable like FRAMEWORKS?