Hidden Items for Min/Max - Level

TreePicker.php

<?php 

    /**
     * Generate the tree view for a given collection.
     *
     * @param CollectionInterface $objCollection The collection to iterate over.
     *
     * @param string              $treeClass     The class to use for the tree.
     *
     * @return string
     */
    protected function generateTreeView($objCollection, $treeClass)
    {
        $arrHtml = array();

        foreach ($objCollection as $objModel) {
            /** @var ModelInterface $objModel */

            $level = $objModel->getMeta(DCGE::TREE_VIEW_LEVEL);
            if ((($this->maxLevel) > 0) && ($level > ($this->maxLevel - 2))) {
                $objModel->setMeta($objModel::HAS_CHILDREN, false);
            }
            if (($this->maxLevel > 0) && ($level > ($this->maxLevel - 1))) {
                continue;
            }


            $strToggleID = $objModel->getProviderName() . '_' . $treeClass . '_' . $objModel->getID();
            $arrHtml[] = $this->parseModel($objModel, $strToggleID);
            if ($objModel->getMeta($objModel::HAS_CHILDREN) && $objModel->getMeta(DCGE::TREE_VIEW_IS_OPEN)) {
                $template = new ContaoBackendViewTemplate('widget_treepicker_child');
                $subHtml  = '';

                foreach ($objModel->getMeta(DCGE::TREE_VIEW_CHILD_COLLECTION) as $objCollection) {
                    $subHtml .= $this->generateTreeView($objCollection, $treeClass);
                }

                $template
                    ->setTranslator($this->getEnvironment()->getTranslator())
                    ->set('objParentModel', $objModel)
                    ->set('strToggleID', $strToggleID)
                    ->set('strHTML', $subHtml)
                    ->set('strTable', $objModel->getProviderName());

                $arrHtml[] = $template->parse();
            }
        }

        return implode("\n", $arrHtml);
    }