Is it possible to make RactiveProperty public get private set in UniRx

Question

I have two classes. One of them have BoolReactiveProperty. I want the second class to be able to subscribe only without being able to change the value. This is my current code

public class SourceToggle : MonoBehaviour
{
    public BoolReactiveProperty boolRP { get; private set; } 
        = new BoolReactiveProperty();

    private void Start()
    {
        boolRP.Subscribe(b => GetComponent<Toggle>().isOn = b);

        GetComponent<Toggle>()
            .OnValueChangedAsObservable()
            .Subscribe(b => boolRP.SetValueAndForceNotify(b));
    }
}

public class SubscribedToggle : MonoBehaviour
{
    [SerializeField]
    private SourceToggle sourceToggle;

    private void Start()
    {
        sourceToggle.boolRP
            .Subscribe(b => GetComponent<Toggle>().isOn = b);

        GetComponent<Toggle>()
            .OnValueChangedAsObservable()
            .Subscribe(b => sourceToggle.boolRP.SetValueAndForceNotify(b));
    }
}

Answer 1

I don't totally get what you want to prevent. I guess you want to prevent your SubscribedToggle to call SetValueAndForceNotify on your ReactiveProperty?

Then declare a public IReadOnlyReactiveProperty and manage a private BoolReactiveProperty in your SourceToggle class.

public class SourceToggle : MonoBehaviour
{
    private BoolReactiveProperty isOn;
    private Toggle toggle;

    public IReadOnlyReactiveProperty<bool> IsOn => isOn;

    private void Awake()
    {
        toggle = GetComponent<Toggle>();

        isOn = new BoolReactiveProperty(toggle.isOn);

        toggle
            .OnValueChangedAsObservable()
            .Subscribe(b => isOn.SetValueAndForceNotify(b));

        isOn.Subscribe(b => toggle.isOn = b);
    }
}

public class SubscribedToggle : MonoBehaviour
{
    [SerializeField]
    private SourceToggle sourceToggle;

    private void Start()
    {
        sourceToggle.IsOn
            .Subscribe(b => GetComponent<Toggle>().isOn = b);

        // GetComponent<Toggle>()
        //     .OnValueChangedAsObservable()
        //     .Subscribe(b => sourceToggle.IsOn.SetValueAndForceNotify(b)); // Impossible to call SetValueAndForceNotify
    }
}