def _display_value_vertical(self, value):
        """Display the current value and update the label position."""
        if self._showvalue:
            self.label.configure(text=self._formatter.format(float(value)))
            if self._labelpos in ['e', 'w']:
                y = self.convert_to_pixels(float(value))
                self.label.place_configure(y=y)
Display the current value and update the label position.