QT overloaded signal in QComboBox cannot connect to slot

Asked Jan 14 '15 at 12:35

Active Jan 14 '15 at 12:46

Viewed 463 times

I want to use slot-signals stuff without SLOT() & SIGNAL() macroses, as explained here - exactly, I want to implement this part

QObject::connect(&a, &Counter::valueChanged, &b, &Counter::setValue);

In example above - slot and signal taking no arguments.

My real-life example:

connect(m_subsystemComboBox, &QComboBox::currentIndexChanged, this, &CMainWindow::ComboBoxChange);

Catch here is following - QComboBox::currentIndexChanged is overloaded to accept QString and int. And by using example above - I get following error from visual studio

IntelliSense: cannot determine which instance of overloaded function "QComboBox::currentIndexChanged" is intended
IntelliSense: no instance of overloaded function "CMainWindow::connect" matches the argument list
        argument types are: (QComboBox *, <unknown-type>, CMainWindow *, void (CMainWindow::*)(const QString &str))

I have tried to append (QString) to functions in connect() - another error:

IntelliSense: expression must be an lvalue or a function designator

Could anyone help me to achieve connection of currentIndexChanged signal with QString to my slot?

edited Jan 14 '15 at 12:46

asked Jan 14 '15 at 12:35

Starl1ght

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`CMainWindow::ComboBoxChange` accept `QString` or `int` too? – pezy Jan 14 '15 at 12:41
How do you "overload" the QComboBox::currentIndexChanged signal? Please show the code. – vahancho Jan 14 '15 at 12:41
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You seem to be connecting the signals and slots the other way around. The syntax is `object, signal, object slot` not `object, slot, object signal`. – thuga Jan 14 '15 at 12:43
@pezy nope, only QString. – Starl1ght Jan 14 '15 at 12:44
@thuga right, fixed, however, error remains the same – Starl1ght Jan 14 '15 at 12:46
@vahancho I did not overload anything, it's already overloaded - I've made a link to QT docs on submitting question. – Starl1ght Jan 14 '15 at 12:47
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See [this question](http://stackoverflow.com/questions/16794695/qt5-overloaded-signals-and-slots). – thuga Jan 14 '15 at 12:50
@thuga thanks, exactly what I need, will search better next time! – Starl1ght Jan 14 '15 at 12:57

QT overloaded signal in QComboBox cannot connect to slot

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