/*! 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: 3.1.1
   *
   * 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, 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);
  	}
  
  }));