How to map to overload Qt slot

I want to overload a Qt SLOT to either react to an emitted clicked() SIGNAL from a QPushButton or a stateChanged(int) SIGNAL from a QCheckBox (since there is no SIGNAL that emits when the checkbox is checked only).

So these are my two SLOTs.

void Widget::sendCom(QString data)
{
    std::cout << "In scope of sendCom"<< std::endl;
}
void Widget::sendCom(QString data, int state)
{
    std::cout << "In scope of overloaded sendCom: " << std::endl;
}

With widget->createButton(SLOT(sendCom(QString), data); i call the following and the mapping works fine.

void Widget::createButton(const char *member, QString &data)
{
    QPushButton *button = new QPushButton(this);
    signalMapper = new QSignalMapper(this);
    signalMapper->setMapping(button, data);
    connect(signalMapper, SIGNAL(mapped(QString)), this, member);
    connect(button, SIGNAL(clicked()), signalMapper, SLOT(map()));
    ...
}


void Widget::createCheckBox(const char *member, QString &data)
{
}

with widget->createCheckBox(SLOT(QString, int), data) i want to pass in ChechBox's state to the overloaded Widget::sendCom(QString data, int state)as well. How has the mapping to be done?

According to the documentation QSignalMapper only manages parameterless signals. You could derive an new class from QCheckBox where you connect the stateChanged(int) SIGNAL to a corresponding slot in the class where you emit a setChecked() or a setUnchecked() SIGNAL which can be handled by a QSignalMapper.