using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.EventSystems;

public class Trigger : MonoBehaviour

{

    EventTrigger eventTrigger;

    // Start is called before the first frame update

    void Start()

    {

        eventTrigger = GetComponent<EventTrigger>();

        AddPointerEnterEvent();

        AddPointerExitEvent();

        AddPointerClickEvent();

    }

    void AddPointerEnterEvent()

    {

        EventTrigger.Entry entry = new EventTrigger.Entry();

        entry.eventID = EventTriggerType.PointerEnter;

        entry.callback = new EventTrigger.TriggerEvent();

        UnityEngine.Events.UnityAction<BaseEventData> callback = new UnityEngine.Events.UnityAction<BaseEventData>(PointerEnter);

        entry.callback.AddListener(callback);

        eventTrigger.triggers.Add(entry);

        Debug.Log("AddPointerEnterEvent");

    }

    void AddPointerExitEvent()

    {

        EventTrigger.Entry entry = new EventTrigger.Entry();

        entry.eventID = EventTriggerType.PointerExit;

        entry.callback = new EventTrigger.TriggerEvent();

        UnityEngine.Events.UnityAction<BaseEventData> callback = new UnityEngine.Events.UnityAction<BaseEventData>(PointerExit);

        entry.callback.AddListener(callback);

        eventTrigger.triggers.Add(entry);

        Debug.Log("AddPointerExitEvent");

    }

    void AddPointerClickEvent()

    {

        EventTrigger.Entry entry = new EventTrigger.Entry();

        entry.eventID = EventTriggerType.PointerClick;

        entry.callback = new EventTrigger.TriggerEvent();

        UnityEngine.Events.UnityAction<BaseEventData> callback = new UnityEngine.Events.UnityAction<BaseEventData>(PointerClick);

        entry.callback.AddListener(callback);

        eventTrigger.triggers.Add(entry);

        Debug.Log("AddPointerClickEvent");

    }

    void PointerEnter(BaseEventData baseEventData)

    {

        Debug.Log("enter");

    }

    void PointerExit(BaseEventData baseEventData)

    {

        Debug.Log("exit");

    }

    void PointerClick(BaseEventData baseEventData)

    {

        Debug.Log("click");

    }

}