Subscribing to Events
The following code example shows how to call the subscribe method within a Visualforce page to subscribe to specified events published from a canvas app.
// Subscribe to a single event.
Sfdc.canvas.controller.subscribe({name : 'mynamespace.myevent0',
onData : function (e) {}});
// Subscribe to multiple events in a single call.
Sfdc.canvas.controller.subscribe([
{name : 'mynamespace.myevent1', onData : function(e) {}},
{name : 'mynamespace.myevent2', onData : function(e) {}}
]);