Module bevy_ecs::event

Event handling types.

Structs

• EventId
  An EventId uniquely identifies an event stored in a specific World.
• EventIterator
  An iterator that yields any unread events from an EventReader or ManualEventReader.
• EventIteratorWithId
  An iterator that yields any unread events (and their IDs) from an EventReader or ManualEventReader.
• EventReader
  Reads events of type T in order and tracks which events have already been read.
• EventRegistry
  A registry of all of the Events in the World, used by event_update_system to update all of the events.
• EventWriter
  Sends events of type T.
• Events
  An event collection that represents the events that occurred within the last two Events::update calls. Events can be written to using an EventWriter and are typically cheaply read using an EventReader.
• ManualEventReader
  Stores the state for an EventReader.
• SendBatchIds
  Iterator over sent EventIds from a batch.

Enums

• ShouldUpdateEvents
  Controls whether or not the events in an EventRegistry should be updated.

Traits

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

Functions

• event_update_condition
  A run condition for event_update_system.
• event_update_system
  A system that calls Events::update on all registered Events in the world.
• signal_event_update_system
  Signals the event_update_system to run after FixedUpdate systems.

Derive Macros

• Event