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Current File : /home/azimutno/www/demo/libraries/nextend/javascript/jquery/1.9.1/jquery.mousewheel.js

/*! 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 (jQuery) {
    (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);
    
            // <=ie9 (fix for ie8)
            try {
              event.originalEvent.hasOwnProperty('wheelDelta')
            }
            catch(e) {
              deltaY = delta;
            }
        
            // Add event and delta to the front of the arguments
            args.unshift(event, delta, deltaX, deltaY);
    
            return ($.event.dispatch || $.event.handle).apply(this, args);
        }
    
    }));
})(njQuery);