Postpone connect of QML function to c++ Qt signal

[rdeem]

Hi,

I have successfully managed to connect a QML callback function to a Qt signal being emitted from a C++ class using the code below:

//QML
onClicked: {
   CppClass.finished.connect(callback)
}
 function callback() {
   console.log("Callback function called!")
}
//C++
void CppClass::ready()
{
    emit finished();
}

My problem is that I would like to have several functions connected to the signal, but only one at a time. To solve this i would like to register the functions to the CppClass which pushes the functions to a local stack so they later can be connected from within the CppClass. I can unfortunately not find out the type of the argument used in the connect function called from QML. Below is sample code for what I would like to do:

//QML
onClicked: {
   CppClass.registerFunction(callback)
}
 function callback() {
   console.log("Callback function called!")
}
//C++
void CppClass::registerFunction(void* function) // <--- Not sure what type to use here
{
    m_stack.push(function);
}
void CppClass::ready()
{
    void* function = m_stack.pop();
    connect(this, SIGNAL(finished()), <arguments to connect function here>);
    emit finished();
    disconnect(function);
}

[rdeem]

I solved it without signal using callback function directly:

Item {
   id: myItem
   onClicked: {
      CppClass.registerFunction(myItem, "callback")
   }
   function callback() {
      console.log("Callback function called!")
   }
}
//C++
void CppClass::registerFunction(QObject* object, QString function)
{
    struct CallbackInfo info;
    info.object = object;
    info.function = function;
    m_stack.push(info);
}
void CppClass::ready()
{
    struct CallbackInfo info = m_callbackStack.pop();
    QMetaObject::invokeMethod(info.object, info.function.toLatin1().constData());
}