EventEmitter class




count int
Get the unique count of events registered in the emitter.
no setter
hashCode int
The hash code for this object.
no setterinherited
runtimeType Type
A representation of the runtime type of the object.
no setterinherited


clear() → void
Clear all subscribers from the cache.
emit(String event, [Object? sender, Object? data]) → void
API to emit events. event is a required parameter. If sender information is sent, it will be used to intimate user about it.
getListenersCount(String event) int
Get the list of subscribers for a particular event.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
off(EventListener listener) → void
Remove event listener from emitter. This will unsubscribe the caller from the emitter from any future events. Listener should be a valid instance.
on(String event, Object context, EventCallback? callback) EventListener
API to register for notification. It is mandatory to pass event name and callback parameters.
removeAllByCallback(EventCallback callback) → void
Remove all listeners which matches with the callback provided. It is possible to register for multiple events with a single callback. This mechanism makesure that all event registrations would be cancelled which matches the callback.
removeAllByEvent(String event) → void
Use this mechanism to remove all subscription for a particular event. Caution : This will remove all the listeners from multiple files or classes or modules. Think twice before calling this API and make sure you know what you are doing!!!
removeListener(String eventName, EventCallback? callback) → void
Unsubscribe from getting any future events from emitter. This mechanism uses event name and callback to unsubscribe from all possible events.
toString() String
A string representation of this object.


operator ==(Object other) bool
The equality operator.