YAHOO.lang.augmentProto

YAHOO.lang.augmentProto

YAHOO.namespace('example');

// Create a class Foo for some greater purpose
YAHOO.example.Foo = function () {
    /* code specific to Foo */

    // Add a custom event for the instance
    this.createEvent('interestingMoment');
}
YAHOO.example.Foo.prototype.doSomething = function() {
    /* ..do something interesting... */

    // Fire off the custom event
    this.fireEvent('interestingMoment');
}

// Make the custom event stuff possible via augmentProto
YAHOO.lang.augmentProto(YAHOO.example.Foo, YAHOO.util.EventProvider);

var f = new YAHOO.example.Foo();

// Add some event listeners
f.subscribe('interestingMoment', function () {
    var p = YAHOO.util.Dom.get('demo_p1');
    p.innerHTML = 'I was notified of an interesting moment';
});
f.subscribe('interestingMoment', function () {
    var p = YAHOO.util.Dom.get('demo_p2');
    p.innerHTML = 'I was also notified of an interesting moment';
});

// Add a listener to the button to call the instance's doSomething method
YAHOO.util.Event.on('demo','click', function () { f.doSomething() });