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.
14 var types = ['DOMMouseScroll', 'mousewheel'];
16 $.event.special.mousewheel = {
18 if ( this.addEventListener )
19 for ( var i=types.length; i; )
20 this.addEventListener( types[--i], handler, false );
22 this.onmousewheel = handler;
25 teardown: function() {
26 if ( this.removeEventListener )
27 for ( var i=types.length; i; )
28 this.removeEventListener( types[--i], handler, false );
30 this.onmousewheel = null;
35 mousewheel: function(fn) {
36 return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel");
39 unmousewheel: function(fn) {
40 return this.unbind("mousewheel", fn);
45 function handler(event) {
46 var args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true;
48 event = $.event.fix(event || window.event);
49 event.type = "mousewheel";
51 if ( event.wheelDelta ) delta = event.wheelDelta/120;
52 if ( event.detail ) delta = -event.detail/3;
54 // Add events and delta to the front of the arguments
55 args.unshift(event, delta);
57 return $.event.handle.apply(this, args);