<?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@magento.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.magento.com for more information.
 *
 * @category    Mage
 * @package     Mage_Adminhtml
 * @copyright  Copyright (c) 2006-2015 X.commerce, Inc. (http://www.magento.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
{
    /**
     * Returns js code that is used instead of default toggle code for "Use default config" checkbox
     *
     * @return string
     */
    public function getToggleCode()
    {
        $htmlId = 'use_config_' . $this->getHtmlId();
        return "toggleValueElements(this, this.parentNode.parentNode);"
            . "if (!this.checked) toggleValueElements($('$htmlId'), $('$htmlId').parentNode);";
    }

    /**
     * Retrieve Element HTML fragment
     *
     * @return string
     */
    public function getElementHtml()
    {
        $elementDisabled = $this->getDisabled() == 'disabled';
        $disabled = false;

        if (!$this->getValue() || $elementDisabled) {
            $this->setData('disabled', 'disabled');
            $disabled = true;
        }

        $html = parent::getElementHtml();
        $htmlId = 'use_config_' . $this->getHtmlId();
        $html .= '<input id="' . $htmlId . '" name="use_config[]" value="' . $this->getId() . '"';
        $html .= ($disabled ? ' checked="checked"' : '');

        if ($this->getReadonly() || $elementDisabled) {
            $html .= ' disabled="disabled"';
        }

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

        return $html;
    }
}
