silverstripe-docsviewer/code/forms/DocumentationAdvancedSearchForm.php

<?php

/**
 * @package docsviewer
 */
class DocumentationAdvancedSearchForm extends Form
{
    public function __construct($controller)
    {
        $versions = $controller->getManifest()->getAllVersions();
        $entities = $controller->getManifest()->getEntities();

        $q = ($q = $controller->getSearchQuery()) ? $q->NoHTML() : "";

        // klude to take an array of objects down to a simple map
        $entities = $entities->map('Key', 'Title');

        // if we haven't gone any search limit then we're searching everything
        $searchedEntities = $controller->getSearchedEntities();

        if (count($searchedEntities) < 1) {
            $searchedEntities = $entities;
        }
        
        $searchedVersions = $controller->getSearchedVersions();
        
        if (count($searchedVersions) < 1) {
            $searchedVersions = $versions;
        }

        $fields = FieldList::create(
            TextField::create('q', _t('DocumentationViewer.KEYWORDS', 'Keywords'), $q),
            //CheckboxSetField::create('Entities', _t('DocumentationViewer.MODULES', 'Modules'), $entities, $searchedEntities),
            CheckboxSetField::create(
                'Versions',
                _t('DocumentationViewer.VERSIONS', 'Versions'),
                $versions, $searchedVersions
            )
        );

        $actions = FieldList::create(
            FormAction::create('results', _t('DocumentationViewer.SEARCH', 'Search'))
        );
        
        $required = RequiredFields::create(array('Search'));
        
        parent::__construct(
            $controller,
            'AdvancedSearchForm',
            $fields,
            $actions,
            $required
        );
        
        $this->disableSecurityToken();
        $this->setFormMethod('GET');
        $this->setFormAction($controller->Link('results'));
    }
}