Returns the value for the slider at the inputed position.
        
        :param      pos | <int>
        
        :return     <int>

def valueAt( self, pos ):
        """
        Returns the value for the slider at the inputed position.
        
        :param      pos | <int>
        
        :return     <int>
        """
        if ( self.orientation() == Qt.Horizontal ):
            perc = (self.width() - 4 - pos) / float(self.width())
        else:
            perc = (self.height() - 4 - pos) / float(self.height())
        
        start = self.minimum()
        end   = self.maximum()
        
        return round((end - start) * (1 - perc))