Subversion-Projekte lars-tiefland.ci

/*! 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);
        }

}));