TuanTuan-Engine/Assets/GameFramework/Runtime/EventSystem/IEvent.cs

namespace Tuan.GameFramework
{
    public interface IEvent { }

    public interface IEventHandler<TEvent> where TEvent : IEvent
    {
        void HandleEvent(TEvent eventData);
    }

    public struct ApplicationFocusEvent : IEvent
    {
        public bool HasFocus;
    }

    public struct SceneLoadEvent : IEvent
    {
        public string SceneName;
        public float Progress;
    }

    public abstract class EventHandler<TEvent> : IEventHandler<TEvent> where TEvent : IEvent
    {
        public void HandleEvent(TEvent eventData)
        {
            OnEvent(eventData);
        }

        protected abstract void OnEvent(TEvent eventData);
    }
}