1 YUI.add('event-mousewheel', function (Y, NAME) {

     2 

     3 /**

     4  * Adds mousewheel event support

     5  * @module event

     6  * @submodule event-mousewheel

     7  */

     8 var DOM_MOUSE_SCROLL = 'DOMMouseScroll',

     9     fixArgs = function(args) {

    10         var a = Y.Array(args, 0, true), target;

    11         if (Y.UA.gecko) {

    12             a[0] = DOM_MOUSE_SCROLL;

    13             target = Y.config.win;

    14         } else {

    15             target = Y.config.doc;

    16         }

    17 

    18         if (a.length < 3) {

    19             a[2] = target;

    20         } else {

    21             a.splice(2, 0, target);

    22         }

    23 

    24         return a;

    25     };

    26 

    27 /**

    28  * Mousewheel event.  This listener is automatically attached to the

    29  * correct target, so one should not be supplied.  Mouse wheel

    30  * direction and velocity is stored in the 'wheelDelta' field.

    31  * @event mousewheel

    32  * @param type {string} 'mousewheel'

    33  * @param fn {function} the callback to execute

    34  * @param context optional context object

    35  * @param args 0..n additional arguments to provide to the listener.

    36  * @return {EventHandle} the detach handle

    37  * @for YUI

    38  */

    39 Y.Env.evt.plugins.mousewheel = {

    40     on: function() {

    41         return Y.Event._attach(fixArgs(arguments));

    42     },

    43 

    44     detach: function() {

    45         return Y.Event.detach.apply(Y.Event, fixArgs(arguments));

    46     }

    47 };

    48 

    49 

    50 }, '@VERSION@', {"requires": ["node-base"]});