Major_Project_A/Assets/Scripts/UI/LogicTrayUI.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;
using UnityEngine.UI;

public class LogicTrayUI : MonoBehaviour
{

    [SerializeField]
    protected List<LogicBlock> list;
    [SerializeField]
    protected GameObject Prefab;
    [SerializeField]
    protected int insertIndex = -1;
    [SerializeField]
    private Transform content;


    public void Start()
    {
        UpdateDisplay();
    }

    public void OnHoverStart(BagItem item, RectTransform rect)
    {
        insertIndex = content.childCount;
        UpdateDisplay();
    }

    public void OnHoverEnd(BagItem item, RectTransform rect)
    {
        insertIndex = -1;
        UpdateDisplay();
    }

    public void OnHoverUpdate(BagItem item, RectTransform rect)
    {
        
        foreach(Transform child in content)
        {
            RectTransform childRect = child as RectTransform;
            if (child == null)
                continue;

            if (rect.GlobalRect().Overlaps(childRect.GlobalRect()))
            {
                if (insertIndex != child.GetSiblingIndex())
                {
                    insertIndex = child.GetSiblingIndex();
                    UpdateDisplay();
                    
                }
                break;
            }

        }


    }

    [ContextMenu("Update Display")]
    public void UpdateDisplay()
    {
        int destroyedCount = content.childCount;
        foreach (Transform child in content)
            Destroy(child.gameObject);


        foreach(LogicBlock element in list)
        {
            GameObject elementObject = Instantiate(Prefab, content);
            elementObject.GetComponentInChildren<TextMeshProUGUI>().text = element.name;
        }

        if (insertIndex != -1)
        {
            GameObject elementObject = Instantiate(Prefab, content);
            elementObject.GetComponentInChildren<TextMeshProUGUI>().text = "insert";
            elementObject.GetComponentInChildren<Image>().color = new Color(0.5f, 0.5f, 0.5f, 0.25f);

            elementObject.transform.SetSiblingIndex(destroyedCount + insertIndex);
        }

            

    }




}