Contao\DC_Table::panel PHP Method

    protected function panel()
    {
        if ($GLOBALS['TL_DCA'][$this->strTable]['list']['sorting']['panelLayout'] == '') {
            return '';
        }
        // Reset all filters
        if (isset($_POST['filter_reset']) && \Input::post('FORM_SUBMIT') == 'tl_filters') {
            /** @var AttributeBagInterface $objSessionBag */
            $objSessionBag = \System::getContainer()->get('session')->getBag('contao_backend');
            $data = $objSessionBag->all();
            unset($data['filter'][$this->strTable]);
            unset($data['filter'][$this->strTable . '_' . CURRENT_ID]);
            unset($data['sorting'][$this->strTable]);
            unset($data['search'][$this->strTable]);
            $objSessionBag->replace($data);
            $this->reload();
        }
        $intFilterPanel = 0;
        $arrPanels = array();
        $arrPanes = \StringUtil::trimsplit(';', $GLOBALS['TL_DCA'][$this->strTable]['list']['sorting']['panelLayout']);
        foreach ($arrPanes as $strPanel) {
            $panels = '';
            $arrSubPanels = \StringUtil::trimsplit(',', $strPanel);
            foreach ($arrSubPanels as $strSubPanel) {
                $panel = '';
                // Regular panels
                if ($strSubPanel == 'search' || $strSubPanel == 'limit' || $strSubPanel == 'sort') {
                    $panel = $this->{$strSubPanel . 'Menu'}();
                } elseif ($strSubPanel == 'filter') {
                    $panel = $this->{$strSubPanel . 'Menu'}(++$intFilterPanel);
                } else {
                    $arrCallback = $GLOBALS['TL_DCA'][$this->strTable]['list']['sorting']['panel_callback'][$strSubPanel];
                    if (is_array($arrCallback)) {
                        $this->import($arrCallback[0]);
                        $panel = $this->{$arrCallback[0]}->{$arrCallback[1]}($this);
                    } elseif (is_callable($arrCallback)) {
                        $panel = $arrCallback($this);
                    }
                }
                // Add the panel if it is not empty
                if ($panel != '') {
                    $panels = $panel . $panels;
                }
            }
            // Add the group if it is not empty
            if ($panels != '') {
                $arrPanels[] = $panels;
            }
        }
        if (empty($arrPanels)) {
            return '';
        }
        if (\Input::post('FORM_SUBMIT') == 'tl_filters') {
            $this->reload();
        }
        $return = '';
        $intTotal = count($arrPanels);
        $intLast = $intTotal - 1;
        for ($i = 0; $i < $intTotal; $i++) {
            $submit = '';
            if ($i == $intLast) {
                $submit = '

<div class="tl_submit_panel tl_subpanel">
  <button name="filter" id="filter" class="tl_img_submit filter_apply" title="' . \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['applyTitle']) . '">' . $GLOBALS['TL_LANG']['MSC']['apply'] . '</button>
  <button name="filter_reset" id="filter_reset" value="1" class="tl_img_submit filter_reset" title="' . \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['resetTitle']) . '">' . $GLOBALS['TL_LANG']['MSC']['reset'] . '</button>
</div>';
            }
            $return .= '
<div class="tl_panel cf">
  ' . $submit . $arrPanels[$i] . '
</div>';
        }
        $return = '
<form action="' . ampersand(\Environment::get('request'), true) . '" class="tl_form" method="post">
<div class="tl_formbody">
  <input type="hidden" name="FORM_SUBMIT" value="tl_filters">
  <input type="hidden" name="REQUEST_TOKEN" value="' . REQUEST_TOKEN . '">
  ' . $return . '
</div>
</form>
';
        return $return;
    }