Adding mouse event tracking to a QLabel contained in a main window

[dmginc]

I have created a main window with Qt Creator containing a QLabel named tracking_frame ...

How would I add mouse tracking to this QLabel only? - for example, outputting the coordinates (with respect to the QLabel) of a mouse click within the label.

I realise that I need to overwrite the protected member function: void mousePressEvent(QMouseEvent *event) inside tracking_frame and then create a function like so:

void ??? ::mousePressEvent(QMouseEvent *event)
{
    fprintf(stderr,"(x,y)=(%d,%d)\n",event->pos().x(),event->pos().y());
} // mousePressEvent()

void ??? ::mousePressEvent(QMouseEvent *event)
{
    fprintf(stderr,"(x,y)=(%d,%d)\n",event->pos().x(),event->pos().y());
} // mousePressEvent()

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I am just unsure of where to place the

protected:
void mousePressEvent(QMouseEvent *event);

protected:
void mousePressEvent(QMouseEvent *event);

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(as the QLabel class definition is inside "ui_MainWindow.h" as it was all created in Qt Creator):

If I place it in the MainWin class definition in MainWindow.h the mouse tracking works but of course for anywhere in the main window...

What do I have to do?

I hope someone can help me out with this!
Hopefully it is a fairly straightforward procedure

Cheers!