If you want to use an Observer Pattern for a value, and you don't want
to implement the entire change event handler, the ValueListener<T> lets
you do that for you.
You need to declare a ValueListener<T> of your type as a field or a property.
I recommend to declare it as readonly to avoid loosing the OnChanged event references.
Value is implicitly casted to or from the value type you want. That means you can initialize
your object using the value directly (see following example).
using BaseTool;
using UnityEngine;
using UnityEngine.UI;
public class MyComponent : MonoBehaviour
{
public readonly ValueListener<int> Lifepoints = 100;
public readonly ValueListener<string> Nickname = new();
public Text NameLabel;
public Text LifeLabel;
public void Start()
{
Lifepoints.OnChanged += (oldLife, newLife) =>
LifeLabel.text = $"{oldLife} -> {newLife}/100";
Nickname.OnChanged += (_, newName) =>
NameLabel.text = newName;
Nickname.Value = "MyName";
string name = Nickname;
Debug.Log(name);
}
}
ValueListener
If you want to use an Observer Pattern for a value, and you don't want to implement the entire change event handler, the
ValueListener<T>lets you do that for you.You need to declare a
ValueListener<T>of your type as a field or a property. I recommend to declare it as readonly to avoid loosing theOnChangedevent references.Value is implicitly casted to or from the value type you want. That means you can initialize your object using the value directly (see following example).