General and Desktop

@ofmrew hey, I'm glad you made it work. One more question: Why the inline for tval()? Well,... habid. I believe a function defined entirely inside a class is implicitly an inline function.

@VRHans Do you mean on Windows? Chromium has been using Clang for Linux and macOS for many years now: https://www.phoronix.com/scan.php?page=news_item&px=MTg0MTk On Windows, the switch from MSVC to Clang happened 8 months ago: https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/Y3OEIKkdlu0 I'm not sure what it means for Qt. It would be nice if there's an easy way for Clang to produce binaries that are compatible with GCC -- then we could get Qt WebEngine for MinGW compilers too. In broader terms, Clang for Chromium might be an extra motivator for the Qt Project to make Clang/LLVM a Tier 1 toolchain on Windows. However, this would require dropping a at least one version of MSVC or even MinGW, so I doubt we will see this in the near future.

Hi, Because the first one has been obsoleted and QUrlQuery should be used and the second one has also been obsoleted and should be replaced by query(QUrl::FullyEncoded).toLatin1().

Hi, Depending on what you need, you can draw on a QImage and then draw that image in your custom widget. What is it that you want to achieve ?

Hi, Can you share your code ? What about the stack trace ?

For anyone else stuck here. I give you the gift of working code. m_system is a pointer to the FMOD system m_sound is a pointer to the FMOD sound void Sound::createSoundFromResource(std::string filePath) { // get the file based on the path QFile resourceFile(QString::fromStdString(filePath)); Q_ASSERT_X(resourceFile.exists(), "createSoundFromResource", "the filepath does not exist"); // open the file and read all the data from it if (resourceFile.open(QIODevice::ReadOnly)) { auto data = resourceFile.readAll(); // set metadata about the file so FMOD can read it FMOD_CREATESOUNDEXINFO* exinfo = new FMOD_CREATESOUNDEXINFO(); exinfo->length = static_cast<unsigned int>(data.length()); exinfo->cbsize = sizeof(FMOD_CREATESOUNDEXINFO); // the unmentioned line which was killing me auto result = FMOD_System_CreateSound(m_system, data.data(), FMOD_OPENMEMORY, exinfo, &m_sound); SoundWrapper::CheckError(result); } else { Q_ASSERT_X(false, "createSoundFromResource", "opening the files failed"); } }

Hi, QApplication::setFont comes to mind for that.

Hi, What do you mean by regular string ? If it comes from the Windows API, you should then consider using QDir:: fromNativeSeparators.

What is the stack trace of the crash ?

The correct way is described in the documentation of the function: void someFunction() { { QSqlDatabase db = QSqlDatabase::database("sales"); QSqlQuery query("SELECT NAME, DOB FROM EMPLOYEES", db); } // Both "db" and "query" are destroyed because they are out of scope QSqlDatabase::removeDatabase("sales"); // correct }

Thank you guys. For now I solved it with semaphore, and a queue to which I am putting all the variables, which gonna be sent. This is not the nicest design, but it works as it should. Maybe I will try to do it with local QEventLoop as you recommended @beecksche, when I will get more understanding of it. For now, problem solved :)

@Qt_crazyer Just run the Qt Maintenance tool again and select the missing components. Then add the kits to QtCreator (in the Options screen)

@El3ctroGh0st said in Can't remove widget from layout: for some reason it doesn't remove it from the layout on what test is your assumption based? I guess you are confused that you still see it in the parent widget? After removing the widget from the layout it is still a child of the parent widget (as also stated in the docs) So you either need to hide it and/or give it a new parent widget. If you want to show the widget again, you do not need to remove it from the layout, but just toggle it's visibility (show()/hide()).

Hi, First post your PyQt5 version, Qt version and OpenCV version. The show the code you are using, the video specification. Explain exactly what your application does while the video is playing. Try the same using OpenCV's highgui library to see if the bottleneck's also there.

I solved the problem. The problem was, I was using wrong library file :). I used library file (.lib) in dll/ directory not in lib/ directory. It worked. Maybe I can update wiki at the end of https://wiki.qt.io/How_to_link_to_a_dll . @jsulm No, I downloded them from microchip website. Thanks for all answers.

@becht hi, first of you shouldn't modify the ui.h file. that one is generated on the fly each time you hit qmake!!! For your class/struct you simply create it like any other cpp class and whereever you want to use it you include the header file. That could be your main.cpp or any other class. If your class does not have any UI-elements but you want to use Qt's MetaOjectSystem and/or use Signal and Slot let your calss inherit from QObject. If your calss describes a part of your UI and you want to display it directly than inherit - generally speaking - from QWidget. For a simple Data/Property storage, create a normal cpp class or use a struct - its quit litteraly the same. Do decide what you should use, really depends on how you want to display and interact with the data.

The issue is solved. See https://www.opengl.org/discussion_boards/showthread.php/200495-Cannot-read-GL_DEPTH_COMPONENT-using-QOpenGLWidget-outside-of-paintGL()-function?p=1290643#post1290643 for explanations

Problem solved. Since windows 10 sole user is the administrator, he has write access everywhere. Simply changing permission of the C:\Qt\Examples directory solved the problem. Please remove write access for administrator and any user on that drectory.