API Docs for: 3.8.0
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File: event/js/mousewheel.js

  1. /**
  2.  * Adds mousewheel event support
  3.  * @module event
  4.  * @submodule event-mousewheel
  5.  */
  6. var DOM_MOUSE_SCROLL = 'DOMMouseScroll',
  7.     fixArgs = function(args) {
  8.         var a = Y.Array(args, 0, true), target;
  9.         if (Y.UA.gecko) {
  10.             a[0] = DOM_MOUSE_SCROLL;
  11.             target = Y.config.win;
  12.         } else {
  13.             target = Y.config.doc;
  14.         }

  16.         if (a.length < 3) {
  17.             a[2] = target;
  18.         } else {
  19.             a.splice(2, 0, target);
  20.         }

  22.         return a;
  23.     };

  25. /**
  26.  * Mousewheel event.  This listener is automatically attached to the
  27.  * correct target, so one should not be supplied.  Mouse wheel 
  28.  * direction and velocity is stored in the 'wheelDelta' field.
  29.  * @event mousewheel
  30.  * @param type {string} 'mousewheel'
  31.  * @param fn {function} the callback to execute
  32.  * @param context optional context object
  33.  * @param args 0..n additional arguments to provide to the listener.
  34.  * @return {EventHandle} the detach handle
  35.  * @for YUI
  36.  */
  37. Y.Env.evt.plugins.mousewheel = {
  38.     on: function() {
  39.         return Y.Event._attach(fixArgs(arguments));
  40.     },

  42.     detach: function() {
  43.         return Y.Event.detach.apply(Y.Event, fixArgs(arguments));
  44.     }
  45. };

  47.