EventListener class

Listener is one who listen for specific event. Listener register for notification with EventEmitter Once the listener is registered, a Listener interface is returned back to the caller. Caller can use this Listener interface to cancel the registration or check the state.

Constructors

EventListener(String eventName, Object context, EventCallback callback, CancelEvent cancel)

Constructor for Listener. This will take four arguments. eventName, callback are mandatory. context, cancel are optional. if cancel callback is provided, then the listener can use that to cancel the subscription.

Properties

callback → EventCallback

The event callback, which the subscriber uses when he register it for.

final

cancel → CancelEvent

A mechanism to cancel the event.

final

context → Object

The context from which subscriber is interested in.

final

eventName → String

The event name, the subscriber subscribed to.

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited