Global Event System for Unreal Engine (EventDispatcher)

EventDispatcher is a lightweight global event system for Unreal Engine that lets Blueprints and C++ classes communicate through events without direct references between objects.

Register a listener in one part of your project and invoke the event from anywhere else, including GameMode, GameInstance, Level Blueprints, Actors, Components and UMG Widgets.

This makes it easier to build decoupled, modular and maintainable gameplay systems, especially when different parts of your game need to communicate without tightly referencing each other.

New in 2.0: Gameplay Tag Events

• Gameplay Tags as Event Identifiers
  Use the Gameplay Tags you already have, no extra assets needed

• Any Struct as Payload
  Send any Blueprint or C++ struct with an event, holding as many values as you need

• Listener Handles
  Register Event returns a handle that unregisters exactly that listener

• Wait For Event
  Async Blueprint node that waits for an event directly in your graph

• Unregister All Events For Object
  Remove every listener an object registered with one node

Key Features

• Global Event Communication
  Invoke events from anywhere in your project

• Blueprint and C++
  Every node is also available as a static C++ function

• No Direct References Required
  Communicate between unrelated Actors, Widgets and systems

• Many Event Types
  Gameplay Tag events with struct payload, plus Simple, Object Payload, String, Int, Float, Bool (and more)

• Event Identifiers or Names
  Use Gameplay Tags, Event Identifier assets or plain string names

• Optional Target
  Send an event to one specific listener instead of all of them

• Predictable Order
  Events are delivered in the order they were invoked

• Queued or Immediate Dispatch
  Run callbacks on the next frame or directly inside the Invoke call

• Automatic Cleanup
  Listeners on destroyed objects are removed automatically

• Safe Payloads
  Payload objects are kept alive until every listener has received them

• Debugging
  Verbose logging and a Debug Event Manager node that lists every registered listener

Common Use Cases

• UI and HUD updates

• Quest and inventory changes

• Gameplay and player events

• Game state changes

• Global notifications

• Menu communication

• Level events

• System-to-system communication

Requirements

• Unreal Engine 5.1 or newer for version 2.0

• Unreal Engine 4.27 – 5.0 use version 1.6.8, which does not include Gameplay Tag events

Documentation & Examples

• https://eventdispatcher.eeldev.com/

• Feature Demonstration: https://youtu.be/uWZn_4Hz1n4

• Tutorial Guide: https://youtu.be/7FfA-v4aLLg

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