[Unity] UI 롱 클릭 이벤트 처리 with UniRx

짧은 글

 

 

`ObservableLongPointerDownTrigger.cs`

- 판정을 원하는 UI오브젝트에 컴포넌트로 추가

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UniRx;
using UniRx.Triggers;
using UnityEngine.EventSystems;

public class ObservableLongPointerDownTrigger : ObservableTriggerBase, IPointerDownHandler, IPointerUpHandler
{
    public float IntervalSecond = 1f;

    Subject<Unit> onLongPointerDown;
    Subject<Unit> onPointerDown;
    Subject<Unit> onPointerUp;

    float? raiseTime;

    void Update()
    {
        if (raiseTime != null && raiseTime <= Time.realtimeSinceStartup)
        {
            if (onLongPointerDown != null) onLongPointerDown.OnNext(Unit.Default);
            raiseTime = null;
        }
    }

    void IPointerDownHandler.OnPointerDown(PointerEventData eventData)
    {
        raiseTime = Time.realtimeSinceStartup + IntervalSecond;
        if (onPointerDown != null)
            onPointerDown.OnNext(Unit.Default);
    }

    void IPointerUpHandler.OnPointerUp(PointerEventData eventData)
    {
        raiseTime = null;
        if (onPointerUp != null)
            onPointerUp.OnNext(Unit.Default);
    }

    public IObservable<Unit> OnLongPointerDownAsObservable()
    {
        return onLongPointerDown ?? (onLongPointerDown = new Subject<Unit>());
    }

    public IObservable<Unit> OnPointerDownAsObservable()
    {
        return onPointerDown ??= new Subject<Unit>();
    }

    public IObservable<Unit> OnPointerUpAsObservable()
    {
        return onPointerUp ??= new Subject<Unit>();
    }

    protected override void RaiseOnCompletedOnDestroy()
    {
        if (onLongPointerDown != null)
        {
            onLongPointerDown.OnCompleted();
        }

        if(onPointerDown != null)
        {
            onPointerDown.OnCompleted();
        }

        if(onPointerUp != null)
        {
            onPointerUp.OnCompleted();
        }
    }
}

 

 

`LongPointerDownTester.cs`

- 사용법

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

public class LongPointerDownTester : MonoBehaviour
{
    public ObservableLongPointerDownTrigger trigger;

    private void Start()
    {
        trigger.OnLongPointerDownAsObservable().Subscribe(val =>
        {
            Debug.Log("Long Click");
        });

        trigger.OnPointerUpAsObservable().Subscribe(val =>
        {
            Debug.Log("Pointer Up");
        });

        trigger.OnPointerDownAsObservable().Subscribe(val =>
        {
            Debug.Log("Pointer Down");
        });
    }
}

 

 

여담

사실 평범한 `Pointer Up&Down`의 경우는 `Event Trigger`컴포넌트를 쓰면 되긴한다

근데 이왕이면 롱클릭, 포인터 업&다운 셋 다 같은 방식으로 이벤트를 관리하면 좀 더 보기 좋지않을까 싶었다

 

출처

UniRx 저장소 리드미에서 찾은 코드를 약간 커스텀 함

GitHub - neuecc/UniRx: Reactive Extensions for Unity