if (defined $text)
        {
            $self->{gdta_x_axis}->set_text($text);

            my $angle = 0;
            if ($self->{x_labels_vertical})
            {
                $self->{gdta_x_axis}->set_align('bottom', 'center');
                $angle = PI/2;
            }
            else
            {
                $self->{gdta_x_axis}->set_align('center', 'right');
            }
            $self->{gdta_x_axis}->draw($x - $self->{axis_space}, $y, $angle);
        }