Mootools Event Proxy

gistfile1.js

//http://jsfiddle.net/sixtyseconds/HrKHp/

var Proxy = new Class({
    'addDelegate': function(object, events) {
        var self = this;
        
        if (!self.delegates) {
            self.delegates = [];
        }
        
        Array.each(Array.from(events), function(event) {
            var callback = function() {
                object.fireEvent(event);
            }.bind(self);
            
            self.delegates.push({
                'object': object,
                'event': event,
                'callback': callback
            });
            
            self.addEvent(event, callback);
        });
    },
    'removeDelegate': function(object, event) {
        var self = this;
        Array.each(self.delegates, function(delegate, i) {
            if (delegate.object == object) {
                if (!event || delegate.event == event) {
                    self.removeEvent(delegate.event, delegate.callback);
                    delete self.delegates[i];
                }
            }
        });
    }
});

var Foo = new Class({
    Implements: [Options, Events, Proxy],
    'options': {
        'onEvent1': function() {
            console.log('[Foo] onEvent1');
        }
    },
    'initialize': function(options) {
        this.setOptions(options);
        
        var bar = new Bar();
        this.addDelegate(bar, 'onEvent2');
        this.addDelegate(bar, ['onEvent3', 'onEvent4']);
        this.removeDelegate(bar, 'onEvent3');
    }
});

var Bar = new Class({
    Implements: [Options, Events],
    'options': {
        'onEvent2': function() {
            console.log('[Bar] onEvent2');
        },
        'onEvent3': function() {
            console.log('[Bar] onEvent3');
        },
        'onEvent4': function() {
            console.log('[Bar] onEvent4');
        }
    },
    'initialize': function(options) {
        this.setOptions(options);
    }
});

var something = new Foo();
something.fireEvent('onEvent1');
something.fireEvent('onEvent2');
something.fireEvent('onEvent3');
something.fireEvent('onEvent4');