Debugging console about qtfirebase

[Larpon]

Hi @Trikos
I'm glad to hear you got it working 🙂
I think you're referring to this ?

[Trikos]

Yes but you do you get the data inside the console? Im trying to print the qDebug from the C++ code inside this console. How do I achieve this? I think that if I write something I will be overwritten everytime

[Larpon]

It's done in the App QML singleton.
If you want to include qDebug messages from C++ I guess you could just set a message handler in C++ that redirects messages to a similar QML singleton or something?

[Trikos]

I don't know how to implement this handler. Right now I'm appending text into a QString and emitting a signal every time it gets updated, but it is a very bad implementation xD

[Larpon]

I can' t help with any specific setups. I have this code in one of my projects:

void messageOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg)
{
    QByteArray localMsg = msg.toLocal8Bit();
    const char *file = context.file ? context.file : "";
    const char *function = context.function ? context.function : "";
    switch (type) {
    case QtDebugMsg:
        //fprintf(stderr, "Debug (%s:%u) %s: %s\n", file, context.line, function, localMsg.constData());
        break;
    case QtInfoMsg:
        fprintf(stderr, "Info (%s:%u) %s: %s\n", file, context.line, function, localMsg.constData() );
        break;
    case QtWarningMsg:
        //fprintf(stderr, "Warning (%s:%u) %s: %s\n", file, context.line, function, localMsg.constData());
        break;
    case QtCriticalMsg:
        fprintf(stderr, "Critical (%s:%u) %s: %s\n", file, context.line, function, localMsg.constData());
        break;
    case QtFatalMsg:
        fprintf(stderr, "Fatal (%s:%u) %s: %s\n", file, context.line, function, localMsg.constData());
        break;
    }

}

int main(int argc, char *argv[])
{
   qInstallMessageHandler(messageOutput);

   ... <rest of your main.cpp> ...
}

So instead of using fprintf as I do in this example - you'd send a QString off to your QML object instead.

[Trikos]

What do you mean by "send a QString off to your QML"? I would replace fprintf with MyClass.MyQString = context.line.
Or you are referring to my main QML object that it is always a QQuickView?
`QQuickView *view = new QQuickView;

MyClass clss;

view->rootContext()->setContextProperty("MyClass", &clss);
view->setSource(QUrl("qrc:/Init.qml"));
view->setResizeMode(QQuickView::SizeRootObjectToView);
view->show();

return app.exec();`

Thank you, appreciate your master explanation and help

[Larpon]

Whatever works I guess.

You could probably send messages via a SingletonInstance also - there's many ways to do it I think.

If the way you're doing it currently, works - I guess there's no need to fix it 😉

[Trikos]

Ok, perfect and thanks again

[Larpon]

@Trikos I'm glad to help 🙂