https://www.geneacaux.net/spip/plugins/auto/sarkaspip/v4.2.0/scripts/jquery.mousewheel.js

1/*! Copyright (c) 2009 Brandon Aaron (http://brandonaaron.net)
2 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
3 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
4 * Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers.
5 * Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix.
6 *
7 * Version: 3.0.2
8 * 
9 * Requires: 1.2.2+
10 */
11
12(function($) {
13
14var types = ['DOMMouseScroll', 'mousewheel'];
15
16$.event.special.mousewheel = {
17	setup: function() {
18		if ( this.addEventListener )
19			for ( var i=types.length; i; )
20				this.addEventListener( types[--i], handler, false );
21		else
22			this.onmousewheel = handler;
23	},
24	
25	teardown: function() {
26		if ( this.removeEventListener )
27			for ( var i=types.length; i; )
28				this.removeEventListener( types[--i], handler, false );
29		else
30			this.onmousewheel = null;
31	}
32};
33
34$.fn.extend({
35	mousewheel: function(fn) {
36		return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel");
37	},
38	
39	unmousewheel: function(fn) {
40		return this.unbind("mousewheel", fn);
41	}
42});
43
44
45function handler(event) {
46	var args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true;
47	
48	event = $.event.fix(event || window.event);
49	event.type = "mousewheel";
50	
51	if ( event.wheelDelta ) delta = event.wheelDelta/120;
52	if ( event.detail     ) delta = -event.detail/3;
53	
54	// Add events and delta to the front of the arguments
55	args.unshift(event, delta);
56
57	return $.event.handle.apply(this, args);
58}
59
60})(jQuery);