[UGUI] Joystick

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

public class MyJoystick : MonoBehaviour, IDragHandler, IPointerUpHandler, IPointerDownHandler
{
    public GameObject decoTopRight;
    public GameObject decoTopLeft;
    public GameObject decoBottomLeft;
    public GameObject decoBottomRight;

    private VariableJoystick joystick;

    public UnityAction<Vector2> OnDragAction;
    public UnityAction OnDownAction;
    public UnityAction OnUpAction;

    void Start()
    {
        this.joystick = this.GetComponent<VariableJoystick>();
        this.joystick.SnapX = true;
        this.joystick.SnapY = true;

        this.AllDecoDisable();
    }

    public void OnDrag(PointerEventData eventData)
    {
        //Debug.Log(this.joystick.Direction);
        var dir = this.joystick.Direction;
        var dirX = dir.x;
        var dirY = dir.y;

        if (dirX == 1 && dirY == 1)
        {
            this.AllDecoDisable();
            this.decoTopRight.SetActive(true);
        }
        else if (dirX == -1 && dirY == 1)
        {
            this.AllDecoDisable();
            this.decoTopLeft.SetActive(true);
        }
        else if (dirX == -1 && dirY == -1)
        {
            this.AllDecoDisable();
            this.decoBottomLeft.SetActive(true);
        }
        else if (dirX == 1 && dirY == -1)
        {
            this.AllDecoDisable();
            this.decoBottomRight.SetActive(true);
        }

        this.OnDragAction(this.joystick.Direction);
    }

    private void AllDecoDisable()
    {
        this.decoTopRight.SetActive(false);
        this.decoTopLeft.SetActive(false);
        this.decoBottomRight.SetActive(false);
        this.decoBottomLeft.SetActive(false);
    }

    public void OnPointerUp(PointerEventData eventData)
    {
        this.AllDecoDisable();
        this.OnUpAction();
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        this.OnDownAction();
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class TestJoystick : MonoBehaviour
{
    public MyJoystick joystick;

    void Start()
    {
        this.joystick.OnDragAction = (dir) =>
        {
            Debug.Log(dir);
        };

        this.joystick.OnDownAction = () =>
        {
            Debug.Log("down");
        };

        this.joystick.OnUpAction = () =>
        {
            Debug.Log("up");
        };
    }
}