/**
  * Returns a list of users belonging to a specified group
  *
  * @param class_admin_formgenerator $objForm
  *
  * @return string
  * @permissions edit
  */
 protected function actionGroupMember(class_admin_formgenerator $objForm = null)
 {
     $strReturn = "";
     if ($this->getSystemid() != "") {
         $objGroup = new class_module_user_group($this->getSystemid());
         //validate possible blocked groups
         $bitRenderEdit = $this->isGroupEditable($objGroup);
         $objSourceGroup = $objGroup->getObjSourceGroup();
         $strReturn .= $this->objToolkit->formHeadline($this->getLang("group_memberlist") . "\"" . $objGroup->getStrName() . "\"");
         $objUsersources = new class_module_user_sourcefactory();
         if ($objUsersources->getUsersource($objGroup->getStrSubsystem())->getMembersEditable() && $bitRenderEdit) {
             if ($objForm == null) {
                 $objForm = $this->getGroupMemberForm($objGroup);
             }
             $arrFolder = $this->objToolkit->getLayoutFolder($objForm->renderForm(getLinkAdminHref($this->getArrModule("modul"), "addUserToGroup")), $this->getLang("group_add_user"));
             $strReturn .= $this->objToolkit->getFieldset($arrFolder[1], $arrFolder[0]);
         }
         $objIterator = new class_array_section_iterator($objSourceGroup->getNumberOfMembers());
         $objIterator->setPageNumber((int) ($this->getParam("pv") != "" ? $this->getParam("pv") : 1));
         $objIterator->setArraySection($objSourceGroup->getUserIdsForGroup($objIterator->calculateStartPos(), $objIterator->calculateEndPos()));
         $strReturn .= $this->objToolkit->listHeader();
         $intI = 0;
         foreach ($objIterator as $strSingleMemberId) {
             $objSingleMember = new class_module_user_user($strSingleMemberId);
             $strAction = "";
             if ($objUsersources->getUsersource($objGroup->getStrSubsystem())->getMembersEditable() && $bitRenderEdit) {
                 $strAction .= $this->objToolkit->listDeleteButton($objSingleMember->getStrUsername() . " (" . $objSingleMember->getStrForename() . " " . $objSingleMember->getStrName() . ")", $this->getLang("mitglied_loeschen_frage"), class_link::getLinkAdminHref($this->getArrModule("modul"), "groupMemberDelete", "&groupid=" . $objGroup->getSystemid() . "&userid=" . $objSingleMember->getSystemid()));
             }
             $strReturn .= $this->objToolkit->genericAdminList($objSingleMember->getSystemid(), $objSingleMember->getStrDisplayName(), getImageAdmin("icon_user"), $strAction, $intI++);
         }
         $strReturn .= $this->objToolkit->listFooter() . $this->objToolkit->getPageview($objIterator, "user", "groupMember", "systemid=" . $this->getSystemid());
     }
     return $strReturn;
 }