Qt evet integrated with QML

Damian7546

Hi,

I write simple application in QML and Qt. To exchnage data with visu I use SystemController class which one is registered in QML.
In SystemuController constructor I am creating my objects like: "http networkclient", "serial slave1" etc, etc.. and in this constructor I am doing connecting beetwen them

Now I must use key event filter., but I do not know how expose data from myKeyEventFilter object to object created in SystemController . Below is my main.cpp

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    MyKeyEventFilter myKeyEventFilter;
    app.installEventFilter(&myKeyEventFilter);

    //QML
    qmlRegisterType< SystemController >  ("MyController",1,0,"SystemController");
    QQmlApplicationEngine engine;

    const QUrl url(QStringLiteral("qrc:/main.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();
}

for example in SystemController I have:

SystemController::SystemController(QObject *parent)
    : QObject{parent}
{
    NetworkWorker    *networkWorker = new NetworkWorker;
  connect(networkWorker, &NetworkWorker::companyDetail, this, &SystemController::companyDetails);

}

So I need emit signal form myKeyEventFilter to networkWorker . And in networkWorker emit signal companyDetails to SystemController....

I can not create second networkWorker object in main.cpp and do connect because I will have two different objects

I would be really grateful for any tips and samples ...

JoeCFD

engine->rootContext()->setContextProperty( "myKeyEventFilter",  &myKeyEventFilter );

in your qml file
connect myKeyEventFilter to its signal and then call a func in SystemController.