http://penmania.ru/application/maxsite/plugins/rater/jquery.rater.js

1/**
2 * jQuery Ajax Rater Plugin
3 *
4 * This rater is based on the code Ritesh Agrawal did. Unfortunatly his CSS and the hover technique breaks in some browsers.
5 * So i thought, why not use the best CSS star-rater known to man kind and throw it in the mix.
6 * I have used the CSS and technique from Komodo Media since it is stable and tested on many, many browsers.
7 *
8 * This rater compared, has no cancel button. But i think we can live with that :)
9 * To avoid conflicts i have changed the function name.
10 * 
11 * Licensed under The MIT License
12 * 
13 * @version     1.0
14 * @since       03.01.2007
15 * @author      Kjell Bublitz <[email protected]
16 * @link        http://www.m3nt0r.de/devel/raterDemo/ Demonstration and Documentation
17 * @link        http://php.scripts.psu.edu/rja171/widgets/rating.php Based on Ritesh Agrawal Star Rating System
18 * @link        http://komodomedia.com/blog/index.php/2007/01/20/css-star-rating-redux/ The Komodo Media CSS Rater Blogpost
19 * @license     http://www.opensource.org/licenses/mit-license.php MIT 
20 * @package     jQuery Plugins
21 * @subpackage  Rater
22 */ 
23
24/**
25 * Usage: $('#rating').rater('your_servlet', {style:'basic', maxvalue:5, curvalue:0});
26 *  
27 * @param url The address you want to post the result to. 
28 * @param options The style and value attributes
29 *
30 * Valid options:
31 * ---------------------------------------
32 *       style:       'basic', 'inline' OR 'small'
33 *       maxvalue:    the maximum value / number of stars
34 *       curvalue:    the initial value / selected stars
35 */ 
36jQuery.fn.rater = function(url, options)
37{
38	if(url == null) return;
39	var settings = {
40		url       : url, // post changes to 
41		maxvalue  : 5,   // max number of stars
42		curvalue  : 0,    // number of selected stars
43		slug  : ''    // page slug - MAX
44	};
45	
46	if(options) { jQuery.extend(settings, options); };
47	jQuery.extend(settings, {cancel: (settings.maxvalue > 1) ? true : false});
48	
49	var container = jQuery(this);
50	jQuery.extend(container, { averageRating: settings.curvalue, url: settings.url });
51
52	if(!settings.style || settings.style == null || settings.style == 'basic') {
53		var raterwidth = settings.maxvalue * 25;
54		var ratingparent = '<ul class="star-rating" style="width:'+raterwidth+'px">';
55	}
56	if(settings.style == 'small') {
57		var raterwidth = settings.maxvalue * 10;
58		var ratingparent = '<ul class="star-rating small-star" style="width:'+raterwidth+'px">';
59	}
60	if(settings.style == 'inline') {
61		var raterwidth = settings.maxvalue * 10;
62		var ratingparent = '<span class="inline-rating"><ul class="star-rating small-star" style="width:'+raterwidth+'px">';
63	}
64	container.append(ratingparent);
65	
66	// create rater
67	var starWidth, starIndex, listitems = '';
68	var curvalueWidth = Math.floor(100 / settings.maxvalue * settings.curvalue);
69	for(var i = 0; i <= settings.maxvalue ; i++) {
70		if (i == 0) {
71			listitems+='<li class="current-rating" style="width:'+curvalueWidth+'%;">'+settings.curvalue+'/'+settings.maxvalue+'</li>';
72		} else {
73			starWidth = Math.floor(100 / settings.maxvalue * i);
74			starIndex = (settings.maxvalue - i) + 2;
75			listitems+='<li class="star"><a href="#'+i+'" title="'+i+'/'+settings.maxvalue +'" style="width:'+starWidth+'%;z-index:'+starIndex+'">'+i+'</a></li>';
76		}
77	}
78	container.find('.star-rating').append(listitems); // i am using find here, because the span wrapped in the small style would break children()
79
80	if(settings.maxvalue > 1) // add a container for the ajax result
81	{
82		container.append('<span class="star-rating-result"></span>'); 
83	}
84	var stars = jQuery(container).find('.star-rating').children('.star');
85	stars.click(function()
86	{
87		if(settings.maxvalue == 1) // on / off
88		{
89			settings.curvalue = (settings.curvalue == 0) ? 1 : 0;
90			jQuery(container).find('.star-rating').children('.current-rating').css({width:(settings.curvalue*100)+'%'});
91			jQuery.post(container.url, { "rating": settings.curvalue, "slug": settings.slug });
92			return false;
93		}
94		else
95		{
96			settings.curvalue = stars.index(this) + 1;
97			raterValue = jQuery(this).children('a')[0].href.split('#')[1];
98			jQuery.post(container.url, { "rating": raterValue, "slug": settings.slug  }, function(response){
99				container.children('.star-rating-result').html(response)	
100			});
101			return false;
102		}
103		return true;
104	});
105
106	return this; // strict warning: anonymous function does not always return a value. fix?
107}