using UnityEngine.UI;
using UnityEngine;
using UnityEngine.EventSystems;
using KTGMGemClient;

public class ImageWater : MonoBehaviour, IDragHandler, IBeginDragHandler, IEndDragHandler
{
    RectTransform rectTransform;//自身Rect
    GameObject target;//推拽到塔位置的标识
    Image tmpImage;//自身图片
    Vector2 pos;//初始坐标

    // Start is called before the first frame update
    void Start()
    {
        rectTransform = GetComponent<RectTransform>();
        pos = rectTransform.anchoredPosition;
        tmpImage = GetComponent<Image>();

    }
    public void SetTarget(GameObject target)
    {
        this.target = target;
    }
    bool isDraging;
    public bool IsDraging
    {
        get
        {
            return isDraging;
        }
    }
    Vector3 dragPos;//开始拖拽的临时变量
    public void OnDrag(PointerEventData eventData)
    {
        RectTransformUtility.ScreenPointToWorldPointInRectangle(rectTransform, eventData.position, eventData.enterEventCamera, out dragPos);
        rectTransform.position = dragPos;
    }

    public void OnBeginDrag(PointerEventData eventData)
    {
        isDraging = true;
        tmpImage.raycastTarget = false;

    }

    public void OnEndDrag(PointerEventData eventData)
    {
        isDraging = false;
        if (target != null)
        {
            //生成一个1级的水元素塔
            Debug.Log("生成一个1级的水元素塔");
            EventCenter.Ins.BroadCast((int)KTGMGemClient.EventType.CreateWaterLv1);
            gameObject.SetActive(false);
            target.GetComponent<Image>().sprite = tmpImage.sprite;

        }
        else
        {
            rectTransform.anchoredPosition = pos;
            tmpImage.raycastTarget = true;
        }
    }
}