Module event

Event handling types.

Re-exports

• pub use update::EventUpdates;

Structs

• EventCursor
  Stores the state for an EventReader or EventMutator.
• EventId
  An EventId uniquely identifies an event stored in a specific World.
• EventIterator
  An iterator that yields any unread events from an EventReader or EventCursor.
• EventIteratorWithId
  An iterator that yields any unread events (and their IDs) from an EventReader or EventCursor.
• EventMutIterator
  An iterator that yields any unread events from an EventMutator or EventCursor.
• EventMutIteratorWithId
  An iterator that yields any unread events (and their IDs) from an EventMutator or EventCursor.
• EventMutator
  Mutably reads events of type T keeping track of which events have already been read by each system allowing multiple systems to read the same events. Ideal for chains of systems that all want to modify the same events.
• 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.
• SendBatchIds
  Iterator over sent EventIds from a batch.
• SendEvent
  A command to send an arbitrary Event, used by Commands::send_event.

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