Unity C# Event Bus

Description

This EventBus system provides a way to create decoupled architectures in Unity projects. It allows communication between different parts of an application without requiring direct references.

Code Structure

This EventBus system contains several C# classes residing in the Scripts\EventBus directory:

EventBus.cs - Main EventBus class that provides static functions for registering, deregistering, and triggering custom events.
EventBinding.cs - IEventBinding interface and class definition for EventBinding, which is used to bind functions to events.
Events.cs - IEvent interface and sample code, which shows how to define custom events.
PredefinedAssemblyUtil.cs - Utility class for locating assemblies and finding types within them. See Unity Documentation.
EventBusUtil.cs - Static initialization methods and additional utilities used for EventBus.

Example Usage

The usage generally works like:

public struct PlayerEvent : IEvent {
    public int health;
    public int mana;
}

EventBinding<PlayerEvent> playerEventBinding;

void OnEnable() {    
    playerEventBinding = new EventBinding<PlayerEvent>(HandlePlayerEvent);
    EventBus<PlayerEvent>.Register(playerEventBinding);

    // Can Add or Remove Actions to/from the EventBinding
}

void OnDisable() {
    EventBus<PlayerEvent>.Deregister(playerEventBinding);
}

void Start() {
    EventBus<PlayerEvent>.Raise(new PlayerEvent {
        health = healthComponent.GetHealth(),
        mana = manaComponent.GetMana()
    });    
}

void HandlePlayerEvent(PlayerEvent playerEvent) {
    Debug.Log($"Player event received! Health: {playerEvent.health}, Mana: {playerEvent.mana}");
}

YouTube

Watch the tutorial video here

You can also check out my YouTube channel for more Unity content.

Installation and Setup

Since this is a Unity-centric project, you will need to have Unity installed on your system. The EventBus codebase is entirely C# and conforms to the .NETFramework v4.7.1 standards.

To use these scripts in your project, please place these scripts in your Scripts or a related directory in the Unity editor.

Contributions

Contributions are always welcome. You can contribute by improving the EventBus codebase, enhancing its features, or providing suggestions.

Inspired by

This project takes inspiration from the following open source projects:

thedodd/Unity-Event-Bus