source: extensions/Public_Piwigo_WordPress_Widget/Public_WP_Piwigo_Widget.php @ 4056

<?php
/*
Plugin Name: Public Piwigo WordPress Widget
Plugin URI: http://piwigo.org/ext/extension_view.php?eid=
Description: Public Piwigo WordPress Widget (PW^2) is a WordPress 2.8 widget, it links a public picture in your Piwigo gallery (<a href="http://piwigo.org/">Piwigo</a>). In other words, it's a WordPress Sidebar Widget with some available public pictures in your Piwigo gallery as a prereq.
Version: 1.00
Author: VDigital
Author URI: http://www.vdigital.org/sharing/
*/
if (defined('PHPWG_ROOT_PATH')) return; /* Avoid Automatic install under Piwigo */
/*  Copyright 2009  VDigital  (email : vpiwigo[at]gmail[dot]com)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
if (!defined('PPW_NAME')) define('PPW_NAME','Public Piwigo WordPress ');
if (!defined('PPW_PFX')) define('PPW_PFX','Public_Piwigo_WordPress_');

class Public_Piwigo_WordPress_Widget extends WP_Widget
{
        function Public_Piwigo_WordPress_Widget(){
                $widget_ops = array('classname' => PPW_PFX . 'Widget',
                        'description' => __( "Adds a thumbnail and its link (to the picture) inside your blog sidebar.") );
                $control_ops = array('width' => 300, 'height' => 300);
                $this->WP_Widget(PPW_PFX . 'Widget', PPW_NAME . 'Widget', $widget_ops, $control_ops);
        }
        // Code generator
        function widget($args, $gallery){
                include 'Public_WP_Piwigo_code.php';
        }
        function update($new_gallery, $old_gallery){
                $gallery = $old_gallery;
                $gallery['title'] = strip_tags(stripslashes($new_gallery['title']));
                $gallery['thumbnail'] = (strip_tags(stripslashes($new_gallery['thumbnail'])) == 'true') ? 'true':'false';
                $gallery['piwigo'] = strip_tags(stripslashes($new_gallery['piwigo']));
                $gallery['external'] = strip_tags(stripslashes($new_gallery['external']));
                $gallery['number'] = intval(strip_tags(stripslashes($new_gallery['number'])));
                $gallery['category'] = intval(strip_tags(stripslashes($new_gallery['category'])));
                $gallery['from'] = intval(strip_tags(stripslashes($new_gallery['from'])));
                $gallery['divclass'] = strip_tags(stripslashes($new_gallery['divclass']));
                $gallery['class'] = strip_tags(stripslashes($new_gallery['class']));
                $gallery['most_visited'] = (strip_tags(stripslashes($new_gallery['most_visited'])) == 'true') ? 'true':'false';
                $gallery['best_rated'] = (strip_tags(stripslashes($new_gallery['best_rated'])) == 'true') ? 'true':'false';
                $gallery['most_commented'] = (strip_tags(stripslashes($new_gallery['most_commented'])) == 'true') ? 'true':'false';
                $gallery['random'] = (strip_tags(stripslashes($new_gallery['random'])) == 'true') ? 'true':'false';
                $gallery['recent_pics'] = (strip_tags(stripslashes($new_gallery['recent_pics'])) == 'true') ? 'true':'false';
                $gallery['calendar'] = (strip_tags(stripslashes($new_gallery['calendar'])) == 'true') ? 'true':'false';
                $gallery['tags'] = (strip_tags(stripslashes($new_gallery['tags'])) == 'true') ? 'true':'false';
                $gallery['comments'] = (strip_tags(stripslashes($new_gallery['comments'])) == 'true') ? 'true':'false';
                $gallery['mbcategories'] = (strip_tags(stripslashes($new_gallery['mbcategories'])) == 'true') ? 'true':'false';
                return $gallery;
        }
        function form($gallery){
                // Options
                include 'Public_WP_Piwigo_options.php';
        }
}

// Register
function Public_Piwigo_WordPress_Widget_Init() {
                        register_widget(PPW_PFX . 'Widget');
}
add_action('widgets_init', PPW_PFX . 'Widget_Init');
?>