vampire-like/Assets/GameMain/Scripts/Runtime/UIBase/Common/CommonButton.cs

using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace SepCore.UI
{
    public class CommonButton : Button
    {
        [SerializeField] private Image _background = null;
        
        private Color _originalBackgroundColor;

        [SerializeField] private UnityEvent _onPointerEnterAction = new();

        [SerializeField] private UnityEvent _onClickAction = new();

        [SerializeField] private UnityEvent _onPointerExitAction = new();

        protected override void Awake()
        {
            base.Awake();
            _originalBackgroundColor = _background.color;
        }

        protected override void OnEnable()
        {
            _background.color = _originalBackgroundColor;
        }

        protected override void OnDisable()
        {
            _background.color = new Color(0.3f, 0.3f, 0.3f,  0.3f);
        }

        public override void OnPointerEnter(PointerEventData eventData)
        {
            if (eventData.button != PointerEventData.InputButton.Left)
            {
                return;
            }

            EnterHoverState();
        }

        public override void OnPointerDown(PointerEventData eventData)
        {
            base.OnPointerDown(eventData);

            _onClickAction?.Invoke();
        }

        public override void OnPointerExit(PointerEventData eventData)
        {
            if (eventData.button != PointerEventData.InputButton.Left)
            {
                return;
            }

            ExitHoverState();
        }

        public override void OnSelect(BaseEventData eventData)
        {
            _background.color = new Color(1f, 0.9f, 0.3f);
            EnterHoverState();
        }

        public override void OnDeselect(BaseEventData eventData)
        {
            _background.color = _originalBackgroundColor;
            ExitHoverState();
        }

        private void EnterHoverState()
        {
            if (EventSystem.current.currentSelectedGameObject != gameObject)
            {
                EventSystem.current.SetSelectedGameObject(this.gameObject);
            }

            _onPointerEnterAction.Invoke();
        }

        private void ExitHoverState()
        {
            _onPointerExitAction.Invoke();
        }
    }
}