Struct ObserverDescriptor 

pub struct ObserverDescriptor { /* private fields */ }

Store information about what an Observer observes.

This information is stored inside of the Observer component,

Implementations

impl ObserverDescriptor

pub unsafe fn with_event_keys(self, event_keys: Vec<EventKey>) -> Self

Add the given event_keys to the descriptor.

Safety

The type of each EventKey in event_keys must match the actual value of the event passed into the observer.

pub fn with_components(self, components: Vec<ComponentId>) -> Self

Add the given components to the descriptor.

pub fn with_entities(self, entities: Vec<Entity>) -> Self

Add the given entities to the descriptor.

pub fn event_keys(&self) -> &[EventKey]

Returns the event_keys that the observer is watching.

pub fn components(&self) -> &[ComponentId]

Returns the components that the observer is watching.

pub fn entities(&self) -> &[Entity]

Returns the entities that the observer is watching.

Trait Implementations

impl Clone for ObserverDescriptor

fn clone(&self) -> ObserverDescriptor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for ObserverDescriptor

fn default() -> ObserverDescriptor

Returns the “default value” for a type.