Trait bevy_ecs::event::Event

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pub trait Event: Component { }
Expand description

Something that “happens” and might be read / observed by app logic.

Events can be stored in an Events<E> resource You can conveniently access events using the EventReader and EventWriter system parameter.

Events can also be “triggered” on a World, which will then cause any Observer of that trigger to run.

This trait can be derived.

Events implement the Component type (and they automatically do when they are derived). Events are (generally) not directly inserted as components. More often, the ComponentId is used to identify the event type within the context of the ECS.

Events must be thread-safe.

Object Safety§

This trait is not object safe.

Implementors§

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impl Event for RemovedComponentEntity
where Self: Send + Sync + 'static,

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impl Event for OnAdd
where Self: Send + Sync + 'static,

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impl Event for OnInsert
where Self: Send + Sync + 'static,

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impl Event for OnRemove
where Self: Send + Sync + 'static,