public function display($scorm, $cm, $course, $download) {
        global $DB, $OUTPUT, $PAGE;

        $contextmodule = context_module::instance($cm->id);

        if ($groupmode = groups_get_activity_groupmode($cm)) {   // Groups are being used.
            groups_print_activity_menu($cm, new moodle_url($PAGE->url));
        }

        // Find out current restriction.
        $group = groups_get_activity_group($cm, true);
        if (empty($group)) {
            // All users who can attempt scoes.
            $students = get_users_by_capability($contextmodule, 'mod/scorm:savetrack', 'u.id' , '', '', '', '', '', false);
            $allowedlist = empty($students) ? array() : array_keys($students);
        } else {
            // All users who can attempt scoes and who are in the currently selected group.
            $groupstudents = get_users_by_capability($contextmodule, 'mod/scorm:savetrack', 'u.id', '', '', '', $group, '', false);
            $allowedlist = empty($groupstudents) ? array() : array_keys($groupstudents);
        }

        // Labels.
        $labels = [get_string('invaliddata', 'scormreport_graphs')];
        for ($i = 1; $i <= self::BANDS - 1; $i++) {
            $labels[] = ($i - 1) * self::BANDWIDTH . ' - ' . $i * self::BANDWIDTH;
        }

        if ($scoes = $DB->get_records('scorm_scoes', array("scorm" => $scorm->id), 'sortorder, id')) {
            foreach ($scoes as $sco) {
                if ($sco->launch != '') {

                    $data = $this->get_data($sco->id, $allowedlist);
                    $series = new chart_series($sco->title, $data);

                    $chart = new chart_bar();
                    $chart->set_labels($labels);
                    $chart->add_series($series);
                    $chart->get_xaxis(0, true)->set_label(get_string('percent', 'scormreport_graphs'));
                    $yaxis = $chart->get_yaxis(0, true);
                    $yaxis->set_label(get_string('participants', 'scormreport_graphs'));
                    $yaxis->set_stepsize(max(1, round(max($data) / 10)));

                    echo $OUTPUT->heading($sco->title, 3);
                    echo $OUTPUT->render($chart);
                }
            }
        }
    }