/*! 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: 3.1.3 * * Requires: 1.2.2+ */ (function (factory) { if ( typeof define === 'function' && define.amd ) { // AMD. Register as an anonymous module. define(['jquery'], factory); } else if (typeof exports === 'object') { // Node/CommonJS style for Browserify module.exports = factory; } else { // Browser globals factory(jQuery); } }(function ($) { var toFix = ['wheel', 'mousewheel', 'DOMMouseScroll', 'MozMousePixelScroll']; 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, fn; event = $.event.fix(orgEvent); event.type = "mousewheel"; // Old school scrollwheel delta if ( orgEvent.wheelDelta ) { delta = orgEvent.wheelDelta; } if ( orgEvent.detail ) { delta = orgEvent.detail * -1; } // New school wheel delta (wheel event) if ( orgEvent.deltaY ) { deltaY = orgEvent.deltaY * -1; delta = deltaY; } if ( orgEvent.deltaX ) { deltaX = orgEvent.deltaX; delta = deltaX * -1; } // Webkit if ( orgEvent.wheelDeltaY !== undefined ) { deltaY = orgEvent.wheelDeltaY; } if ( orgEvent.wheelDeltaX !== undefined ) { deltaX = orgEvent.wheelDeltaX * -1; } // Look for lowest delta to normalize the delta values absDelta = Math.abs(delta); if ( !lowestDelta || absDelta < lowestDelta ) { lowestDelta = absDelta; } absDeltaXY = Math.max(Math.abs(deltaY), Math.abs(deltaX)); if ( !lowestDeltaXY || absDeltaXY < lowestDeltaXY ) { lowestDeltaXY = absDeltaXY; } // Get a whole value for the deltas fn = delta > 0 ? 'floor' : 'ceil'; delta = Math[fn](delta / lowestDelta); deltaX = Math[fn](deltaX / lowestDeltaXY); deltaY = Math[fn](deltaY / lowestDeltaXY); // Add event and delta to the front of the arguments args.unshift(event, delta, deltaX, deltaY); return ($.event.dispatch || $.event.handle).apply(this, args); } }));