Help: Signals/slots system

[0xl33t]

Hey, how do you connect a signal from a child widget with a slot from the parent widget?

1) I have a MainWindow, and i want to connect the newAction (QAction)
2) the central widget of my main window is a stackedWidget which contains the child widget i want to connect
3) the child widget is a customWidget with a public slot, called foo()

See the attached image...

i tried with this from stackedWidget, which is between(child & parent) mainwindow-customwidget:
connect(parentWidget()->newAction, SIGNAL(triggered()), customWidget, SLOT(foo()));

i get an error saying that QWidget doesn't have a member called newAction()....

So, in short how to connect a child's slot with a parent's signal?

thanks