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

public class LockPanelHandleCtr : MonoBehaviour, IPointerDownHandler
{
    public RectTransform _SelfRec;
    public RectTransform _BGRec;  //用背景尺寸计算
    public GameObject _DescText;
    private float _MaxAnchoredVal = 0;
    private float _MistakeVal = 0.5f;  //误差距离

    private void GetMaxAnchoredVal()
    {
        _MaxAnchoredVal = _BGRec.rect.width - gameObject.GetComponent<Image>().rectTransform.rect.width - _MistakeVal;
    }

    private void OnEnable()
    {
        Reset();
        GetMaxAnchoredVal();

    }

    private void Reset()
    {
        _SelfRec.anchoredPosition = new Vector2(0, 0);
        _DescText.SetActive(true);
    }

    public void OnDrag(PointerEventData eventData)
    {
        if(_SelfRec.anchoredPosition.x >= _MaxAnchoredVal)
        {
            if (LockPanelCtr.Instance)
                LockPanelCtr.Instance.OnUnLock();
        }
        else
        {
            _SelfRec.anchoredPosition = new Vector2(Mathf.Clamp(_SelfRec.anchoredPosition.x + eventData.delta.x, 0, _MaxAnchoredVal), 0);
            if(_DescText.activeInHierarchy)
                _DescText.SetActive(false);
        }

    }

    public void OnPointerUp(PointerEventData eventData)
    {
        if(_SelfRec.anchoredPosition.x >= _MaxAnchoredVal)
        {
            if (LockPanelCtr.Instance)
                LockPanelCtr.Instance.OnUnLock();
        }
        else
        {
            Reset();
        }

    }

    public void OnPointerDown(PointerEventData eventData)
    {
        if (LockPanelCtr.Instance)
            LockPanelCtr.Instance.OnUnLock();
        return;
    }
}