Qt Mainwindow menu signals - qt

Question

I've "Core" object that handles QMainWindow.
Core.h code
class Core : public QObject
{
Q_OBJECT
public:
explicit Core(QObject *parent = 0);
~Core();
void appInit();
int getAuth();
public slots:
void appExit();
private slots:
void appMenuTriggered(QAction *action);
private:
void preInit();
MainWindow *mwnd;
};
Core.cpp code
Core::Core(QObject *parent) : QObject(parent)
{
qDebug() << "Core::Constructor called";
preInit();
}
Core::~Core()
{
delete mwnd;
qDebug() << "Core::Destructor called";
}
int Core::getAuth()
{
LoginDialog *login = new LoginDialog();
int r = login->exec();
delete login;
return r;
}
void Core::appExit() // connected to qapplication aboutToQuit
{
qDebug() << "Core::appExit called";
}
void Core::preInit() // called after getAuth im main.cpp
{
qDebug() << "Core::preInit called";
}
void Core::appMenuTriggered( QAction *action )
{
qDebug() << "action triggered";
}
void Core::appInit()
{
mwnd = new MainWindow();
mwnd->show();
qDebug() << "Core::appInit called";
}
I'm trying to connect mainwindow menubar signal to core slot like this:
connect(mwnd->menuBar(), SIGNAL(triggered()), this, SLOT(appMenuTriggered()));
But it doesn't work. Im new to c++ and Qt. How to connect this?
Or maybe there is better way to handle mainwindow actions to other programm parts.
UPD
Problem solved. Forget to include QMenuBar

Answer 1

You have to give the full function spec in the SIGNAL and SLOT parameters (but without the argument names). Like this:
connect(mwnd->menuBar(),
SIGNAL(triggered(QAction*)),
this,
SLOT(appMenuTriggered(QAction*)));
If you debug such code in Qt Creator, the connect function will write diagnostic error messages to the Application Output pane when it doesn't find a signal or a slot. I suggest that you find these error messages before you fix your problem, so that you know where to look in future. It's very easy to get signals and slots wrong!