public function region_main_settings_menu() {
        $context = $this->page->context;
        $menu = new action_menu();

        if ($context->contextlevel == CONTEXT_MODULE) {

            $this->page->navigation->initialise();
            $node = $this->page->navigation->find_active_node();
            $buildmenu = false;
            // If the settings menu has been forced then show the menu.
            if ($this->page->is_settings_menu_forced()) {
                $buildmenu = true;
            } else if (!empty($node) && ($node->type == navigation_node::TYPE_ACTIVITY ||
                            $node->type == navigation_node::TYPE_RESOURCE)) {

                $items = $this->page->navbar->get_items();
                $navbarnode = end($items);
                // We only want to show the menu on the first page of the activity. This means
                // the breadcrumb has no additional nodes.
                if ($navbarnode && ($navbarnode->key === $node->key && $navbarnode->type == $node->type)) {
                    $buildmenu = true;
                }
            }
            if ($buildmenu) {
                // Get the course admin node from the settings navigation.
                $node = $this->page->settingsnav->find('modulesettings', navigation_node::TYPE_SETTING);
                if ($node) {
                    // Build an action menu based on the visible nodes from this navigation tree.
                    $this->build_action_menu_from_navigation($menu, $node);
                }
            }

        } else if ($context->contextlevel == CONTEXT_COURSECAT) {
            // For course category context, show category settings menu, if we're on the course category page.
            if ($this->page->pagetype === 'course-index-category') {
                $node = $this->page->settingsnav->find('categorysettings', navigation_node::TYPE_CONTAINER);
                if ($node) {
                    // Build an action menu based on the visible nodes from this navigation tree.
                    $this->build_action_menu_from_navigation($menu, $node);
                }
            }

        } else {
            $items = $this->page->navbar->get_items();
            $navbarnode = end($items);

            if ($navbarnode && ($navbarnode->key === 'participants')) {
                $node = $this->page->settingsnav->find('users', navigation_node::TYPE_CONTAINER);
                if ($node) {
                    // Build an action menu based on the visible nodes from this navigation tree.
                    $this->build_action_menu_from_navigation($menu, $node);
                }

            }
        }
        return $this->render($menu);
    }