DaoNiaoShu_Dog/Assets/_Scripts/Application/daoNiaoShu/Other/推拽题/Drag.cs

using JetBrains.Annotations;
using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using ZXKFramework;
namespace DongWuYiXue.DaoNiaoShu
{
    public class Drag : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler, IPointerEnterHandler, IPointerExitHandler
    {
        public enum Group
        {
            group1,
            group2,
            group3,
            group4
        }
        public string dragName;
        public Group group;
        [Header("<22>Ƿ<EFBFBD><C7B7><EFBFBD>ק")]
        public bool drag;
        [HideInInspector]
        public GameObject falseImage;
        [HideInInspector]
        public GameObject rightImage;
        [HideInInspector]
        public GameObject hoverImage;
        [HideInInspector]
        public GameObject dragImage;
        public Drag rightTarget;//<2F><>ȷ<EFBFBD><C8B7><EFBFBD><EFBFBD>
        [HideInInspector]
        public Drag yourTarget;//<2F><><EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD>
        DragManager dragManager;
        [HideInInspector]
        public RectTransform rectTransform;
        private Vector3 startPos;
        private Vector2 offset;
        [HideInInspector]
        public bool right;
        private Canvas canvas;
        private void Awake()
        {
            canvas = GetComponentInParent<Canvas>();
            rectTransform = GetComponent<RectTransform>();
            startPos = rectTransform.localPosition;
            falseImage = transform.FindFirst("FalseImg");
            rightImage = transform.FindFirst("RightImg");
            hoverImage = transform.FindFirst("HoverImg");
            dragImage = transform.FindFirst("DragImg");
        }
        public void Init(DragManager dragManager)
        {
            this.dragManager = dragManager;
            ResetPos();
            right = false;
            falseImage.SetActive(false);
            rightImage.SetActive(false);
            hoverImage.SetActive(false);
            dragImage.SetActive(false);
            yourTarget = null;
        }

        // <20><>ʼ<EFBFBD><CABC>קʱ<D7A7><CAB1><EFBFBD><EFBFBD>
        public void OnBeginDrag(PointerEventData eventData)
        {
            if (drag && !falseImage.activeSelf && !rightImage.activeSelf)
            {
                Vector2 localPoint;
                // ʹ<>ø<EFBFBD><C3B8><EFBFBD> RectTransform <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>
                RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform.parent as RectTransform, eventData.position, canvas.worldCamera, out localPoint);
                // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> UI Ԫ<>ص<EFBFBD>ƫ<EFBFBD><C6AB><EFBFBD><EFBFBD>
                offset = rectTransform.anchoredPosition - localPoint;
                dragManager.drag = this;
            }
        }

        // <20><>ק<EFBFBD><D7A7><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><D0B5><EFBFBD>
        public void OnDrag(PointerEventData eventData)
        {
            if (drag && !falseImage.activeSelf && !rightImage.activeSelf)
            {
                dragImage.SetActive(true);
                hoverImage.SetActive(false);
                Vector2 localPoint;
                RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform.parent as RectTransform, eventData.position, canvas.worldCamera, out localPoint);
                // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD>ú<EFBFBD>ƫ<EFBFBD><C6AB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> UI Ԫ<>ص<EFBFBD>λ<EFBFBD><CEBB>
                rectTransform.anchoredPosition = localPoint + offset;
            }
        }

        public void OnEndDrag(PointerEventData eventData)
        {
            if (drag && !falseImage.activeSelf && !rightImage.activeSelf)
            {
                dragManager.DragEnd();
                dragImage.SetActive(false);
            }
        }
        public void ResetPos()
        {
            rectTransform.localPosition = startPos;
        }

        public void OnPointerEnter(PointerEventData eventData)
        {

            // <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0> EventSystem
            EventSystem eventSystem = EventSystem.current;
            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD> UI <20><>
            if (eventSystem.IsPointerOverGameObject())
            {
                if (!dragImage.activeSelf && yourTarget == null)//dragImage<67><65>hoverImageֻ<65><D6BB><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>ʾ
                {
                    hoverImage.SetActive(true);
                }
            }
        }
        public void OnPointerExit(PointerEventData eventData)
        {
            // <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0> EventSystem
            EventSystem eventSystem = EventSystem.current;
            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD> UI <20><>
            if (eventSystem.IsPointerOverGameObject())
            {
                hoverImage.SetActive(false);
            }
        }
    }
}