ProjectDDD/Packages/SLUnity/SLUI/SLUI2DPosition.cs

using UnityEngine;

namespace Superlazy.UI
{
    public class SLUI2DPosition : SLUIComponent
    {
        public string bind = "Position";
        public bool screenPos = false;

        private RectTransform t;
        private Canvas canvas;
        private RectTransform parent;

        protected override void Validate()
        {
            t = GetComponent<RectTransform>();
            parent = t.parent as RectTransform;
            canvas = GetComponentInParent<Canvas>();
        }

        protected override void Init()
        {
        }

        protected override void Enable()
        {
            SLGame.AddNotify(bindParent.BindPath.CombinePath(bind), OnChange);
        }

        protected override void Disable()
        {
            SLGame.RemoveNotify(bindParent.BindPath.CombinePath(bind), OnChange);
        }

        private void OnChange()
        {
            if (bindParent.Active == false)
                return;

            if (screenPos)
            {
                var pos = SLGame.SessionGet(bindParent.BindPath).Get(bind).ToVector2();

                if (RectTransformUtility.ScreenPointToLocalPointInRectangle(parent, pos, canvas.worldCamera, out var localPoint))
                {
                    t.anchoredPosition = localPoint;
                }
            }
            else
            {
                t.anchoredPosition = SLGame.SessionGet(bindParent.BindPath).Get(bind).ToVector2();
            }
        }
    }
}