EventSystem class

A concrete implementation of EventSystemInterface.

This event system supports:

  • Priority-based event listeners.
  • One-time listeners.
  • Grouped events.
  • Subscriber-aware management.
  • Optional queued execution.
  • Future support for broadcasting events.
Implemented types
Annotations

Constructors

EventSystem()
Creates a new EventSystem instance.

Properties

eventGroups → Map<String, Set<String>>
Returns all registered event groups.
no setteroverride
hashCode → int
The hash code for this object.
no setterinherited
listeners → Map<String, List<EventRegistration>>
Returns all event listeners.
no setteroverride
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
subscriberEvents → Map<Object, Set<String>>
Returns all subscriber-specific event mappings.
no setteroverride

Methods

addToGroup(String groupName, String event) → void
Adds an event to a named group groupName.
override
clear() → void
Clears all event listeners, groups, and subscribers.
override
emit(String event, [dynamic payload, bool queue = false]) → Future<void>
Emits a single event with optional payload.
override
emitGroup(String groupName, [dynamic payload, bool queue = false]) → Future<void>
Emits all events inside a groupName with optional payload.
override
hasListeners(String event) → bool
Checks if an event has active listeners.
override
listenerCount(String event) → int
Returns the number of listeners attached to event.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
off(String event, EventListener listener) → void
Removes a specific listener from an event.
override
offEvent(String event) → void
Removes all listeners registered for a specific event.
override
offSubscriber(Object subscriber) → void
Removes all events registered by a specific subscriber.
override
on(String event, EventListener listener, {EventPriority priority = EventPriority.normal, bool once = false, Object? subscriber}) → void
Registers a listener for an event.
override
once(String event, EventListener listener, {EventPriority priority = EventPriority.normal, Object? subscriber}) → void
Registers a one-time listener for event.
override
removeFromGroup(String groupName, String event) → void
Removes an event from group groupName.
override
toString() → String
A string representation of this object.
inherited

Operators

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