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+/*! Copyright (c) 2013 Brandon Aaron (http://brandonaaron.net)
+ * Licensed under the MIT License (LICENSE.txt).
+ *
+ * Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers.
+ * Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix.
+ * Thanks to: Seamus Leahy for adding deltaX and deltaY
+ *
+ * Version: 3.1.0
+ *
+ * Requires: 1.2.2+
+ */
+
+(function (factory) {
+ if (typeof define === 'function' && define.amd) {
+ // AMD. Register as an anonymous module.
+ define(['jquery'], factory);
+ } else {
+ // Browser globals
+ factory(jQuery);
+ }
+}(function ($) {
+
+ var toFix = ['wheel', 'mousewheel', 'DOMMouseScroll'];
+ var toBind = 'onwheel' in document || document.documentMode >= 9 ? ['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll'];
+ var lowestDelta, lowestDeltaXY;
+
+ if ($.event.fixHooks) {
+ for ( var i=toFix.length; i; ) {
+ $.event.fixHooks[ toFix[--i] ] = $.event.mouseHooks;
+ }
+ }
+
+ $.event.special.mousewheel = {
+ setup: function() {
+ if ( this.addEventListener ) {
+ for ( var i=toBind.length; i; ) {
+ this.addEventListener( toBind[--i], handler, false );
+ }
+ } else {
+ this.onmousewheel = handler;
+ }
+ },
+
+ teardown: function() {
+ if ( this.removeEventListener ) {
+ for ( var i=toBind.length; i; ) {
+ this.removeEventListener( toBind[--i], handler, false );
+ }
+ } else {
+ this.onmousewheel = null;
+ }
+ }
+ };
+
+ $.fn.extend({
+ mousewheel: function(fn) {
+ return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel");
+ },
+
+ unmousewheel: function(fn) {
+ return this.unbind("mousewheel", fn);
+ }
+ });
+
+
+ function handler(event) {
+ var orgEvent = event || window.event, args = [].slice.call( arguments, 1 ), delta = 0, deltaX = 0, deltaY = 0, absDelta = 0, absDeltaXY = 0;
+ event = $.event.fix(orgEvent);
+ event.type = "mousewheel";
+
+ // Old school scrollwheel delta
+ if ( orgEvent.wheelDelta ) { delta = orgEvent.wheelDelta; }
+ if ( orgEvent.detail ) { delta = orgEvent.detail * -1; }
+
+ // New school wheel delta (wheel event)
+ if ( orgEvent.deltaY ) {
+ deltaY = orgEvent.deltaY * -1;
+ delta = deltaY;
+ }
+ if ( orgEvent.deltaX ) {
+ deltaX = orgEvent.deltaX;
+ delta = deltaX * -1;
+ }
+
+ // Webkit
+ if ( orgEvent.wheelDeltaY !== undefined ) { deltaY = orgEvent.wheelDeltaY; }
+ if ( orgEvent.wheelDeltaX !== undefined ) { deltaX = orgEvent.wheelDeltaX * -1; }
+
+ absDelta = Math.abs(delta);
+ if ( !lowestDelta || absDelta < lowestDelta ) { lowestDelta = absDelta; }
+
+ absDeltaXY = Math.max( Math.abs(deltaY), Math.abs(deltaX) );
+ if ( !lowestDeltaXY || absDeltaXY < lowestDeltaXY ) { lowestDeltaXY = absDeltaXY; }
+
+ // Add event and delta to the front of the arguments
+ args.unshift(event, Math.floor(delta/lowestDelta), Math.floor(deltaX/lowestDeltaXY), Math.floor(deltaY/lowestDeltaXY));
+
+ return ($.event.dispatch || $.event.handle).apply(this, args);
+ }
+
+}));