12 Class Blackboard

This example shows you how to use a class Blackboard.

These files can be found in the /Examples/[example] and /Blackboards/Examples folders.

ClassBlackboard.cs

using System;
using CrashKonijn.Blackboard.Contracts;

namespace CrashKonijn.BlackboardPro.Blackboards.Examples
{
    // Make sure the class is serializable so it can show in the editor
    [Serializable]
    public partial class ClassBlackboard : IBlackboard
    {
        private int health = 50;
        private static bool isLowHealth(Signals.Health health) => health.Value < 50;
    }
}

ClassBehaviour.cs

using CrashKonijn.Blackboard.Contracts;
using CrashKonijn.BlackboardPro.Blackboards.Examples;
using UnityEngine;

namespace CrashKonijn.BlackboardPro.Examples._12_blackboard_class
{
    public class ClassBehaviour : MonoBehaviour
    {
        // You can manage your own instance of classes that implement IBlackboard.
        [SerializeField]
        private ClassBlackboard blackboard = new ClassBlackboard();
        
        /* Simple hack to show a button in the editor */
        [Header("Removes 10 health.")]
        [Button(nameof(DoDamage))]
        public string doDamageButton;
        
        /* Simple hack to show a button in the editor */
        [Header("Adds 10 health")]
        [Button(nameof(Heal))]
        public string healButton;
        
        private void OnEnable()
        {
            blackboard.IsLowHealthSignal.OnValueChanged.AddListener(OnLowHealthChanged);
            blackboard.HealthSignal.OnValueChanged.AddListener(OnStartPlayerHealthChanged);
        }

        private void OnDisable()
        {
            blackboard.IsLowHealthSignal.OnValueChanged.RemoveListener(OnLowHealthChanged);
            blackboard.HealthSignal.OnValueChanged.RemoveListener(OnStartPlayerHealthChanged);
        }
        
        private void OnLowHealthChanged(bool value)
        {
            Debug.Log($"Is low health changed to {value}");
        }

        private void OnStartPlayerHealthChanged(int value)
        {
            Debug.Log($"Start player health changed to {value}");
        }
        
        public void Heal()
        {
            blackboard.Health += 10;
        }
        
        public void DoDamage()
        {
            blackboard.Health -= 10;
        }
    }
}