root/galaxy-central/static/scripts/jquery.mousewheel.js @ 2

/*! Copyright (c) 2009 Brandon Aaron (http://brandonaaron.net)
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
 * 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.
 *
 * Version: 3.0.2
 * 
 * Requires: 1.2.2+
 */

(function($) {

var types = ['DOMMouseScroll', 'mousewheel'];

$.event.special.mousewheel = {
        setup: function() {
                if ( this.addEventListener )
                        for ( var i=types.length; i; )
                                this.addEventListener( types[--i], handler, false );
                else
                        this.onmousewheel = handler;
        },
        
        teardown: function() {
                if ( this.removeEventListener )
                        for ( var i=types.length; i; )
                                this.removeEventListener( types[--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 args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true;
        
        event = $.event.fix(event || window.event);
        event.type = "mousewheel";
        
        if ( event.wheelDelta ) delta = event.wheelDelta/120;
        if ( event.detail     ) delta = -event.detail/3;
        
        // Add events and delta to the front of the arguments
        args.unshift(event, delta);

        return $.event.handle.apply(this, args);
}

})(jQuery);