Qt can I connect signals/slots to self in constructor?

EDIT: Not related to signals/slots/connect. Problem was constructor calling constructor.

There might be a better way to do this - I'd be interested in hearing those...

I have MyClass that is derived from a QLabel. I want to pass more data about the derived class back in the signal than what the base signal does. So I made a slot to intercept the customContextMenuRequested signal and emit a revised one that has more data.

When I try to connect up this signal in the constructor, then my slot never gets called. But if I move the Policy and connect lines out to the parent widget(not class hierarchy parent) so they execute after MyClass is fully constructed, then my slot will get called. But I always want that to be connected for this class and it seems like something I would want in it's constructor rather than counting on the parent class to remember to do it.

Is there something I'm doing wrong? Or a better way to add data to a signal?

MyClass::MyClass() : QLabel()
{
    QFont currFont = font();
    currFont.setPointSize(15);
    setFont(currFont);

    setBackgroundRole(QPalette::Mid);

    std::cout << "connecting customContextMenuRequested" << std::endl;
    /** PROBLEM START */
    setContextMenuPolicy(Qt::CustomContextMenu);

    // Is there anything wrong with connecting from "this" to "this" in a constructor?

    QObject::connect(this, SIGNAL(customContextMenuRequested(const QPoint&)),
                     this, SLOT(addCellDataToMenuContextRequest(const QPoint&)));
     /* PROBLEM END **/
}


MyClass::MyClass(QString &cellString, int row, int col)
    : QLabel(cellString)
{
    MyClass();
    setRow(row);
    setCol(col);

}

// This one is a slot
void MyClass::addCellDataToMenuContextRequest(const QPoint& pos)
{
        // This doesn't get printed if I connect in my constructor,
        // but it does print if I do the same connect from a parent widget.
    std::cout << "called addCellDataToMenuContextRequest" << std::endl;

    emit customContextMenuRequestedForCell(pos, _row, _col);
}

So I would like the parent widget to just look for customContextMenuRequestedForCell but right now, the parent widget seems to need to be responsible for customContextMenuRequested as well.