imagelist.php

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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

JFormHelper::loadFieldClass('filelist');

/**
 * Supports an HTML select list of image
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @since       11.1
 */
class JFormFieldImageList extends JFormFieldFileList
{
        /**
         * The form field type.
         *
         * @var    string
         * @since  11.1
         */
        protected $type = 'ImageList';

        /**
         * Method to get the list of images field options.
         * Use the filter attribute to specify allowable file extensions.
         *
         * @return  array  The field option objects.
         *
         * @since   11.1
         */
        protected function getOptions()
        {
                // Define the image file type filter.
                $filter = '\.png$|\.gif$|\.jpg$|\.bmp$|\.ico$|\.jpeg$|\.psd$|\.eps$';

                // Set the form field element attribute for file type filter.
                $this->element->addAttribute('filter', $filter);

                // Get the field options.
                return parent::getOptions();
        }
}