Struct EventBus 

pub struct EventBus { /* private fields */ }

A publish-subscribe event bus for decoupled inter-entity communication.

Entities and game systems can subscribe to named event channels and emit events that are dispatched to all registered handlers.

Implementations

impl EventBus

Implements event subscription, emission, and management for EventBus.

pub fn create() -> EventBus

Creates a new empty event bus.

Returns

• EventBus - The new event bus.

pub fn subscribe(&mut self, event_name: String, handler: EventHandler)

Subscribes a handler to the named event channel.

Arguments

• String - The event name to subscribe to.
• EventHandler - The handler closure to call when the event is emitted.

pub fn emit(&self, event: &EntityEvent)

Emits an event to all handlers subscribed to the matching channel.

The event name is derived from the EntityEvent variant.

Arguments

• &EntityEvent - The event to emit.

pub fn unsubscribe_all(&mut self, event_name: &str)

Removes all handlers for the named event channel.

Arguments

• &str - The event name to clear.

pub fn handler_count(&self, event_name: &str) -> usize

Returns the number of handlers registered for the named event.

Arguments

• &str - The event name.

Returns

• usize - The handler count.

impl EventBus

pub fn get_handlers(&self) -> &EventHandlers

pub fn set_handlers(&mut self, val: EventHandlers) -> &mut Self

impl EventBus

pub fn new() -> Self

Trait Implementations

impl Clone for EventBus

fn clone(&self) -> EventBus

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for EventBus

Implements Default for EventBus as a new empty bus.

fn default() -> EventBus

Returns the “default value” for a type.