bad syntax on connect() statement

mzimmers

Hi all - my notes are at home and I've started a new job (where I'm trying to make a case for adopting Qt). I'm trying to put together a very small example, but getting an error.

Here's the code:

#include "widget.h"
#include "serial.h"

#include <QApplication>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    Serial s;

    QObject::connect(s, &Serial::newText, w, &Widget::addText);
    w.show();

    return a.exec();
}

And here's the error:

C:\Users\mzimmers.CYBERDATA\Qt projects\WiFiButtonProvisioner\main.cpp:12: error: no matching function for call to 'QObject::connect(Serial&, void (Serial::*)(QString), Widget&, void (Widget::*)(QString))'
     QObject::connect(s, &Serial::newText, w, &Widget::addText);
                                                              ^

I'm sure I'm botching the syntax, but I can't find my error. Can someone lend a hand? Thanks.

aha_1980

@mzimmers said in bad syntax on connect() statement:

QObject::connect(s, &Serial::newText, w, &Widget::addText);

I'm pretty sure you must specify the address of s and w:

QObject::connect(&s, &Serial::newText, &w, &Widget::addText);

mzimmers

Hi - yeah, that was it. I'd tried that, and gotten another error that was due to my not declaring QObject as a public base class. Fixed that, and it seems to work now.

Thanks...