QObject::connect: No such slot (for QComboBox object)

U7Development

Hi...
I have a window which has a QComboBox component, on constructor I add some QStrings so this will be composed by some names., then final user selects one.

I'm looking for a way the user select and call a function, so i need to use slot and signals..:

//mywindow.h

class mywindow{
Q_OBJECT

private slots:
     void onAct_cBox(int _i);
}

//mywindow.cpp
//Constructor:
connect(ui->cBox, SIGNAL(activated(int)), this, SLOT(onAct_cBox()));

//member:
void mywindow::onAct_cBox(int _i){
    qDebug() << "Im here"; //never reached here
}

After building:
QObject::connect: No such slot mywindow::onAct_cBox() in
../reservas_minsal/mywindow.cpp:19
QObject::connect: (sender name: 'cBox')
QObject::connect: (receiver name: 'mywindow')

Any clues?
Thanks so much.

JSher

@U7Development

void mywindow::onAct_cBox(int _i){
    qDebug() << "Im here"; //never reached here
}

Takes and int

you have none in

connect(ui->cBox, SIGNAL(activated(int)), this, SLOT(onAct_cBox()));

U7Development

@JSher

Thanks for your answer...

connect(ui->cBox, SIGNAL(activated(int)), this, SLOT(onAct_cBox(int)));

I tried that too, may i still misunderstood it?

Bonnie

That should work.
Do you still get any error message?

eyllanesc

@U7Development change onAct_cBox to onActivatedcBox, See https://doc.qt.io/qt-5/qmetaobject.html#connectSlotsByName. The MOC uses some rules like the format on_<object name>_<signal name>(<signal parameters>); to make connections, and which in your case does not match so it throws that warning.

U7Development

@JSher << @Bonnie << @eyllanesc << " I'm pretty sure i'd try adding int on the lambda argument, now is working";

Thanks!