/**
* Adds mousewheel event support
* @module event
* @submodule event-mousewheel
*/
var DOM_MOUSE_SCROLL = 'DOMMouseScroll',
fixArgs = function(args) {
var a = Y.Array(args, 0, true), target;
if (Y.UA.gecko) {
a[0] = DOM_MOUSE_SCROLL;
target = Y.config.win;
} else {
target = Y.config.doc;
}
if (a.length < 3) {
a[2] = target;
} else {
a.splice(2, 0, target);
}
return a;
};
/**
* Mousewheel event. This listener is automatically attached to the
* correct target, so one should not be supplied. Mouse wheel
* direction and velocity is stored in the 'mouseDelta' field.
* @event mousewheel
* @param type {string} 'mousewheel'
* @param fn {function} the callback to execute
* @param context optional context object
* @param args 0..n additional arguments to provide to the listener.
* @return {EventHandle} the detach handle
* @for YUI
*/
Y.Env.evt.plugins.mousewheel = {
on: function() {
return Y.Event._attach(fixArgs(arguments));
},
detach: function() {
return Y.Event.detach.apply(Y.Event, fixArgs(arguments));
}
};