Signals and Slots woes

[waynew]

Trying to connect a pair of mutually exclusive radio buttons to slots in a different class.
Signals originate from class EnterLog when a radio button is clicked and should be received in ControlDB. The slot functions are defined as public slots in ControlDB.
Here is the code in ControlDB:

public slots:
    void setSingleModeEdit();
    void setSingleModeEntry();

public slots:
    void setSingleModeEdit();
    void setSingleModeEntry();

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void ControlDB::setSingleModeEdit() {
    qDebug() << "single display mode changed to EDIT";
   QSqlDatabase db = QSqlDatabase::database(ctrlConn);
    QSqlQuery query(db);
    query.prepare("UPDATE preferences set defaultSingleView = ?");
    query.addBindValue("EDIT");
    query.exec();
}
 
void ControlDB::setSingleModeEntry() {
    qDebug() << "single display mode changed to ENTRY";
   QSqlDatabase db = QSqlDatabase::database(ctrlConn);
    QSqlQuery query(db);
    query.prepare("UPDATE preferences set defaultSingleView = ?");
    query.addBindValue("ENTRY");
    query.exec();
}

void ControlDB::setSingleModeEdit() {
    qDebug() << "single display mode changed to EDIT";
   QSqlDatabase db = QSqlDatabase::database(ctrlConn);
    QSqlQuery query(db);
    query.prepare("UPDATE preferences set defaultSingleView = ?");
    query.addBindValue("EDIT");
    query.exec();
}

void ControlDB::setSingleModeEntry() {
    qDebug() << "single display mode changed to ENTRY";
   QSqlDatabase db = QSqlDatabase::database(ctrlConn);
    QSqlQuery query(db);
    query.prepare("UPDATE preferences set defaultSingleView = ?");
    query.addBindValue("ENTRY");
    query.exec();
}

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Here is the code in EnterLog:

ControlDB ctrl;
    connect(ui->rbEdit, SIGNAL(clicked()),  &ctrl,  SLOT(setSingleModeEdit()));
    connect(ui->rbEntry, SIGNAL(clicked()),  &ctrl,  SLOT(setSingleModeEntry()));

ControlDB ctrl;
    connect(ui->rbEdit, SIGNAL(clicked()),  &ctrl,  SLOT(setSingleModeEdit()));
    connect(ui->rbEntry, SIGNAL(clicked()),  &ctrl,  SLOT(setSingleModeEntry()));

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The problem is, the signals don't get received. What am I doing wrong here?

[Zlatomir]

You should check that ctrl reference is still valid when the signals are emitted.

[wysota]

Your ctrl object goes out of scope and is destroyed before anything has a chance to happen.

[waynew]

Thanks folks. Working fine now.