//--------------------------------------------------------
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// [Author]: 玩个游戏
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// [ Date ]: Saturday, March 16, 2019
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//--------------------------------------------------------
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using System;
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using UnityEngine;
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using UnityEngine.Events;
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using UnityEngine.EventSystems;
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public class GestureCatcher : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
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{
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Action<Vector2> m_OnDrag;
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Vector2 prePosition = Vector2.zero;
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public void SetDragListener(Action<Vector2> callBack)
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{
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m_OnDrag = callBack;
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}
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public void RemoveListener()
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{
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m_OnDrag = null;
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}
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public void OnBeginDrag(PointerEventData eventData)
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{
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prePosition = eventData.position;
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}
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public void OnDrag(PointerEventData eventData)
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{
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var deltaPosition = eventData.position - prePosition;
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m_OnDrag.Invoke(deltaPosition);
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prePosition = eventData.position;
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}
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public void OnEndDrag(PointerEventData eventData)
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{
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prePosition = eventData.position;
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}
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}
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