[SOLVED] QFontComboBox signals

[ale6111]

Hi,
I need to know when the user change the font in a QFontComboBox and in case to call the slot changeTextFont(). I have

QFontComboBox *fontComboBox = new QFontComboBox(this);
connect(fontComboBox, SIGNAL(currentFontChanged()), this, SLOT(changeTextFont()));

QFontComboBox *fontComboBox = new QFontComboBox(this);
connect(fontComboBox, SIGNAL(currentFontChanged()), this, SLOT(changeTextFont()));

To copy to clipboard, switch view to plain text mode 

but it doesn't work, I get this message in console

Object::connect: No such signal QFontComboBox::currentFontChanged()

Object::connect: No such signal QFontComboBox::currentFontChanged()

To copy to clipboard, switch view to plain text mode 

What am I doing wrong?
Thanks