1/*! Copyright (c) 2010 Brandon Aaron (http://brandonaaron.net) 2 * Licensed under the MIT License (LICENSE.txt). 3 * 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 * Thanks to: Seamus Leahy for adding deltaX and deltaY 7 * 8 * Version: 3.0.4 9 * 10 * Requires: 1.2.2+ 11 */ 12 13(function($) { 14 15var types = ['DOMMouseScroll', 'mousewheel']; 16 17$.event.special.mousewheel = { 18 setup: function() { 19 if ( this.addEventListener ) { 20 for ( var i=types.length; i; ) { 21 this.addEventListener( types[--i], handler, false ); 22 } 23 } else { 24 this.onmousewheel = handler; 25 } 26 }, 27 28 teardown: function() { 29 if ( this.removeEventListener ) { 30 for ( var i=types.length; i; ) { 31 this.removeEventListener( types[--i], handler, false ); 32 } 33 } else { 34 this.onmousewheel = null; 35 } 36 } 37}; 38 39$.fn.extend({ 40 mousewheel: function(fn) { 41 return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel"); 42 }, 43 44 unmousewheel: function(fn) { 45 return this.unbind("mousewheel", fn); 46 } 47}); 48 49 50function handler(event) { 51 var orgEvent = event || window.event, args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true, deltaX = 0, deltaY = 0; 52 event = $.event.fix(orgEvent); 53 event.type = "mousewheel"; 54 55 // Old school scrollwheel delta 56 if ( event.wheelDelta ) { delta = event.wheelDelta/120; } 57 if ( event.detail ) { delta = -event.detail/3; } 58 59 // New school multidimensional scroll (touchpads) deltas 60 deltaY = delta; 61 62 // Gecko 63 if ( orgEvent.axis !== undefined && orgEvent.axis === orgEvent.HORIZONTAL_AXIS ) { 64 deltaY = 0; 65 deltaX = -1*delta; 66 } 67 68 // Webkit 69 if ( orgEvent.wheelDeltaY !== undefined ) { deltaY = orgEvent.wheelDeltaY/120; } 70 if ( orgEvent.wheelDeltaX !== undefined ) { deltaX = -1*orgEvent.wheelDeltaX/120; } 71 72 // Add event and delta to the front of the arguments 73 args.unshift(event, delta, deltaX, deltaY); 74 75 return $.event.handle.apply(this, args); 76} 77 78})(jQuery);