source: Dev/trunk/src/client/dojox/lang/async/event.js @ 501

dojo.provide("dojox.lang.async.event");

// Source of Deferred for events

(function(){
        var d = dojo, event = dojox.lang.async.event;

        event.from = function(src, name){
                return function(){
                        var h, cancel = function(){
                                        if(h){
                                                d.disconnect(h);
                                                h = null;
                                        }
                                },
                                x = new d.Deferred(cancel);
                        h = d.connect(src, name, function(evt){
                                cancel();
                                x.callback(evt);
                        });
                        return x;
                };
        };

        event.failOn = function(src, name){
                return function(){
                        var h, cancel = function(){
                                        if(h){
                                                d.disconnect(h);
                                                h = null;
                                        }
                                },
                                x = new d.Deferred(cancel);
                        h = d.connect(src, name, function(evt){
                                cancel();
                                x.errback(new Error(evt));
                        });
                        return x;
                };
        };
})();