General and Desktop

@SGaist oh, it is mingw64 from msys2.

Hello Daes, I'm facing the same problem and it seems no one responded to your previous post. Would it be possible to combine qt Remote objects and QConcurrent and Qfuture to execute the slots asynchronously?

@SGaist said in Reading integers from a line edit and publishing the data to ROS topics.: QSpinBox Worked like a charm :) Thanks a lot!

Hi, Sure it is, convert it to a QString. Just beware that depending on the content, it might have surprising results.

Hi and welcome to devnet, Did you try to use the eglfs backend ? Since the Nvdia documentation mentions egl as system to use so you do not need an X server running.

@mrjj Oh yeah! This is it and works! :D Many many thanks my hero!

@artwaw said in Is QSettings::setValue costly: QSettings saves all the data to registry. I'd rather avoid that, you understand. I set it to save to .ini files, I didn't try it but registry gave me a impression that it would be messy. Mind you, I don't say your approach will not work in the end. I know Thank you for your insight

@ivanicy You can also try to disable parts of your code until it stops crashing then you know roughly where it is. And if you use CVS like Git you can check the changes since last stable version.

@SPlatten The easiest way is to convert it to string (objectName.toString()) and parse the string with QJsonDocument::fromJson().

@raven-worx Oh, sad it isn't there. Thank you very much.

@aravmadd You have declared a private slot setValue() but do not seem to have actually defined the method, hence the link error?

@J-Hilk thank you

Yes. I am facing the same issue. Do you found any solution. How can I fix this problem.

@suslucoder ok im not sure what s does. Anyway, could you try (in on_Serial_Read) memset(dizi, 0, 14); memcpy(dizi, data.constData(), data.size()); in place ot the line memcpy(dizi, data.constData(), 14); and tell if it still stops at 15 ?

@ngochm You do not explain what this has to do with root. You talk about "privilege". Do you actually run a some (other) process as root from your app? Do you attempt to read from/write to a file in the file system which only allows root access? Or what?

Hi, and welcome! @thaya said in STUCK ! ERROR : No suitable kits found: I just installed the application. You need to install 3 things: Qt Creator, the IDE (Integrated Development Environment) A version of the Qt libraries A C++ compiler that is compatible with your Qt libraries You have definitely installed Qt Creator. However, it's not clear if you have installed Qt and a compiler. (A "Kit" = Qt + Compiler) Which compiler do you want to use?

@AI_Messiah After editing the ui file in designer you should rebuild your project, so the uic compiler generates ui code, then autocomplition should work.

I know this is a very old post but I am stating my solution for newcomers and people running into the same issue in hopes it will help them. I also had this issue and my solution was to add this to my .pro file QMAKE_LFLAGS += -no-pie When I had this issue I tried everything suggested and this is the first one that worked. Then I went online to try to see why that worked but didn't find anything right away so I left as it was. Working. I can't find the link to the forum where I found this now, I had many tabs open then and didn't pay attention to the website name.

Qt Webassembly cannot block the main thread, so normal Qt socket classes still do not work correctly, as is. There is some work being done to get them working better with a threaded version of Qt WebAssembly, but it is still fairly WIP and not scheduled for any Qt version yet. Even so, some things like select() and poll() will not work. Best to use websockets, as any posix sockets get translated into websockets, unless you use a proxy server method mentioned in: https://emscripten.org/docs/porting/networking.html