analytics/webcontent/dojo17/dojo/Evented.js

define("dojo/Evented", ["./aspect", "./on"], function(aspect, on){
	// summary:
	//		The export of this module is a class that can be used as a mixin or base class, 
	// 		to add on() and emit() methods to a class
	// 		for listening for events and emiting events:
	// 		|define(["dojo/Evented"], function(Evented){
	// 		|	var EventedWidget = dojo.declare([Evented, dijit._Widget], {...});
	//		|	widget = new EventedWidget();
	//		|	widget.on("open", function(event){
	//		|	... do something with event
	//		|	 });
	//		|
	//		|	widget.emit("open", {name:"some event", ...});

 	"use strict";
 	var after = aspect.after;
	function Evented(){
	}
	Evented.prototype = {
		on: function(type, listener){
			return on.parse(this, type, listener, function(target, type){
				return after(target, 'on' + type, listener, true);
			});
		},
		emit: function(type, event){
			var args = [this];
			args.push.apply(args, arguments);
			return on.emit.apply(on, args);
		}
	};
	return Evented;
});