Observable Wrapper of event Action<T> for .NET / Unity

Runtime/Reactive/ObservableEvent.cs   HeaderDoc

(c) 2025 Sator Imaging, Licensed under the MIT License https://github.com/sator-imaging/Unity-Fundamentals

Similar to and different from ObservableAction<T>, this class completely encapsulates actual event field inside to provide more elegant look & feel.

How to Use

// keep raw instance private to prevent event invocation
private ObservableEvent<int> m_myEvent = new();

// provide readonly (sub/unsub) interface to consumers
public IObservableEvent<int> MyEvent => m_myEvent;

// invoke event
m_myEvent.Invoke(310);

// consumer can only perform subscribe/unsubscribe
MyEvent.Subscribe(myAction)
    .BindTo(cancellationToken);  // unsubscribe when token is canceled.
    .AddTo(disposables);         // or, add to IDisposable collection to unsub later.
MyEvent.Unsubscribe(myAction);   // ofcourse able to unsubscribe manually.

// clear all event handlers. note that event is still exist and accepts new handler
m_myEvent.Dispose();