using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

// this is only a simple example code to show the zoomming is possible with the correct hierarchy, please, use a more reliable code in your project 
namespace MeadowGames.UINodeConnect4.SampleScene.ScrollViewGraph
{
    public class Zoom : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
    {
        bool _mouseIsOver;
        public RectTransform contentRectTransform;
        public GraphManager graphManager;

        void Start()
        {
            graphManager = GetComponentInParent<GraphManager>();
        }

        void Update()
        {
            if (_mouseIsOver)
            {
                if (Input.mouseScrollDelta.y != 0)
                {
                    // 计算新的缩放比例
                    Vector3 newScale = contentRectTransform.localScale + Vector3.one * Input.mouseScrollDelta.y * 0.2f;

                    // 将缩放值限制在 0.6 到 1.6 之间
                    newScale.x = Mathf.Clamp(newScale.x, 0.6f, 1.6f);
                    newScale.y = Mathf.Clamp(newScale.y, 0.6f, 1.6f);
                    newScale.z = Mathf.Clamp(newScale.z, 0.6f, 1.6f);

                    // 应用新的缩放比例
                    contentRectTransform.localScale = newScale;

                    // 更新 connectionDetectionDistance
                    graphManager.connectionDetectionDistance = 15 * contentRectTransform.localScale.x;
                }
            }
        }

        public void OnPointerEnter(PointerEventData eventData)
        {
            _mouseIsOver = true;
        }

        public void OnPointerExit(PointerEventData eventData)
        {
            _mouseIsOver = false;
        }
    }
}