Assigns the font family and point size settings from the font picker
        widget.

def assignFont(self):
        """
        Assigns the font family and point size settings from the font picker
        widget.
        """
        font = self.currentFont()
        font.setFamily(self._fontPickerWidget.currentFamily())
        font.setPointSize(self._fontPickerWidget.pointSize())
        self.setCurrentFont(font)