<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @copyright  Copyright (c) 2009 Irubin Consulting Inc. DBA Varien (http://www.varien.com)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * Adminhtml additional helper block for sort by
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Adminhtml_Block_Catalog_Category_Helper_Sortby_Available
    extends Varien_Data_Form_Element_Multiselect
{
/**
     * Retrieve Element HTML fragment
     *
     * @return string
     */
    public function getElementHtml()
    {
        $disabled = false;
        if (!$this->getValue()) {
            $this->setData('disabled', 'disabled');
            $disabled = true;
        }
        $html = parent::getElementHtml();

        $htmlId = 'use_config_' . $this->getHtmlId();
        $html .= '<input id="'.$htmlId.'" value="1"';
        $html .= ($disabled ? ' checked="checked"' : '');
        $html .= 'onclick="toggleValueElements(this, this.parentNode);" class="checkbox" type="checkbox">';

        $html .= ' <label for="'.$htmlId.'" class="normal">'
            . Mage::helper('adminhtml')->__('Use Config Settings').'</label>';
        $html .= '<script type="text/javascript">toggleValueElements($(\''.$htmlId.'\'), $(\''.$htmlId.'\').parentNode);</script>';

        return $html;
    }
}
