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qt.network.ssl: No functional TLS backend was found ?

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #13

    What kind of data do you intend to process ?

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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    • B Offline
      B Offline
      BVladimir
      wrote on last edited by
      #14

      Data from stock exchange terminal

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      • B Offline
        B Offline
        BVladimir
        wrote on last edited by
        #15

        I tried to build an exe file:

        #include <QGuiApplication>
        #include <QQmlApplicationEngine>

        int main(int argc, char* argv[]) {
        int argc2 = 1;
        const char* p1{ "C" };
        const char** argv2 = &p1;

        QGuiApplication app(argc2, (char**)argv2);
        
        QQmlApplicationEngine engine;
        const QUrl url(QStringLiteral("qrc:tmpQML/tmpQML.qml"));
        QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
            &app, [url](QObject* obj, const QUrl& objUrl) {
                if (!obj && url == objUrl)
                    QCoreApplication::exit(-1);
            }, Qt::QueuedConnection);
        engine.load(url);
        
        return app.exec();
        

        }

        Same QML:

        import QtQuick 2.12
        import QtQuick.Controls 2.12

        ApplicationWindow {

        title: "Qt Quick Controls Gallery"
        visible: true
        width: 640
        height: 480    
        

        }

        When running from VS 2019, it works fine. And does not try to search any of:

        QFactoryLoader::QFactoryLoader() checking directory path "C:/Qt/6.2.1/msvc2019_64/plugins/platforms/networkaccess" ...

        or

        QFactoryLoader::QFactoryLoader() checking directory path "C:/Qt/6.2.1/msvc2019_64/plugins/platforms/tls" ...

        It's only with dll problem...

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #16

          What are going to use to process your data ?

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • B Offline
            B Offline
            BVladimir
            wrote on last edited by
            #17

            The main idea is Python calls dll's that receive data and display using qt, General work with data where speed is not needed in Python

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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #18

              Well, I must say I fail to understand your architecture here.

              What is so speed critical in your app that you need to have your UI in C++ while doing some processing in Python while the rest is done in C++ again.

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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              • B Offline
                B Offline
                BVladimir
                wrote on last edited by
                #19

                Data from stock exchange terminal - through с++ & qt, analysis in Python.

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #20

                  Why not load the data directly in Python using something like numpy ?

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                  • B Offline
                    B Offline
                    BVladimir
                    wrote on last edited by
                    #21

                    It is assumed that there can be over 10,000 changing values on the screen once per second. I would like to have fewer lags.

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #22

                      If you do all the heavy lifting in Python you should benchmark the GUI as well.

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                      • B Offline
                        B Offline
                        BVladimir
                        wrote on last edited by
                        #23

                        Maybe, but if it is possible to execute all gui in native c++, wouldn't it be preferable?

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                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #24

                          As I wrote: benchmark.

                          Adding a layer of complexity might not be of any benefit in terms of performance, maintainability and architecture.

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                          • B Offline
                            B Offline
                            BVladimir
                            wrote on last edited by
                            #25

                            In any case, I already have a dll for getting data, and I thought it was the easiest way to use it for the gui... But with python, I'll have to do more research...

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                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #26

                              Wait... you are loading the data from C++ then do processing in Python and then trying to send that back to C++ ?

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                              • B Offline
                                B Offline
                                BVladimir
                                wrote on last edited by
                                #27

                                Yes, some data for analysis in python, and some I would like to leave in c++ for gui

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                                • SGaistS Offline
                                  SGaistS Offline
                                  SGaist
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #28

                                  Then wouldn't it make more sense to do it the other way around ? Since you get data through a C++ library, it would make more sense to invoke your Python code from C++ as well.

                                  Interested in AI ? www.idiap.ch
                                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                  • B Offline
                                    B Offline
                                    BVladimir
                                    wrote on last edited by
                                    #29

                                    Well, if it is impossible to use dll for gui, then I will have to write c++ exe and provide interaction with python...

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