[SOLVED] SIGNALs and SLOTs in console mode

vcsala

I am working on a small application which should run in console mode but uses QNetworkAccessManager. The main.cpp looks like this:

@#include <QtCore/QCoreApplication>
#include <QStringList>
#include <QTimer>

#include "clientlogin.h"

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

if (QCoreApplication::arguments().count() < 2)
{
    qDebug() << "Usage: enforceCaptcha <email address>";
    exit(1);

}
else
{
    qDebug() << "Called with" << QCoreApplication::arguments().at(1);
    ClientLogin cl(0, QCoreApplication::arguments().at(1));
    QTimer::singleShot(0, &cl, SLOT(loginLoop()));
}

a.exec&#40;&#41;;

}
@

and my pro file:

@#-------------------------------------------------

Project created by QtCreator 2010-12-16T20:11:33

#-------------------------------------------------

QT += core network
QT -= gui

TARGET = enforceCaptcha
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += main.cpp
clientlogin.cpp

HEADERS +=
clientlogin.h
@

ClientLogin class is inherited from QObject.

The issue is that when I start the application (with an email address) it prints out the debug message then nothing happens. I know it is a noob question, but is the signal-slot mechanism works in console mode? Or what else can be the issue?

vcsala

Some more additional info: in earlier version I left out a.exec() and called cl.loginLoop() directly. That way the first request was sent but no slot (nor the sslErrorHanlder nor the handleNetworkData) was called.

giesbert

Hi,
it could not work, as your object is located on the stack:

@
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

if (QCoreApplication::arguments().count() < 2)
{
    qDebug() << "Usage: enforceCaptcha <email address>";
    exit(1);

}
else
{
    qDebug() << "Called with" << QCoreApplication::arguments().at(1);
    ClientLogin cl(0, QCoreApplication::arguments().at(1));
    QTimer::singleShot(0, &cl, SLOT(loginLoop()));
    // --&gt; here the cl object is destroyed.
}

a.exec&#40;&#41;;

}@

Move the event loop and the cl object in one scope, cl to outside or event loop to insite:

@
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

if (QCoreApplication::arguments().count() < 2)
{
    qDebug() << "Usage: enforceCaptcha <email address>";
    exit(1);

}
else
{
    ClientLogin cl(0, QCoreApplication::arguments().at(1));
    qDebug() << "Called with" << QCoreApplication::arguments().at(1);
    QTimer::singleShot(0, &cl, SLOT(loginLoop()));
    a.exec&#40;&#41;;
}

}@

vcsala

Thanks, this was the solution (and it was really a noob question :))

I beleive as I reedited the code several times to solve the issue I just forgot to check if it is still correct from C++ point of view.