60 lines
1.8 KiB
C#
60 lines
1.8 KiB
C#
using System.Collections;
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using UnityEngine;
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using BaseGames.Core.Events;
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namespace BaseGames.UI
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{
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/// <summary>
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/// 右下角存档进行中提示（架构 10_UIModule §7.6）。
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/// 订阅 EVT_SaveIndicatorVisible（BoolEventChannelSO）：true = 淡入，false = 淡出。
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/// </summary>
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[RequireComponent(typeof(CanvasGroup))]
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public class SaveIndicator : MonoBehaviour
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{
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[SerializeField] private CanvasGroup _cg;
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[SerializeField] private float _fadeDuration = 0.2f;
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[Header("Event Channel")]
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[SerializeField] private BoolEventChannelSO _onSaveIndicatorVisible; // EVT_SaveIndicatorVisible
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private Coroutine _fadeCoroutine;
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private readonly CompositeDisposable _subs = new();
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private void Awake()
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{
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if (_cg == null) _cg = GetComponent<CanvasGroup>();
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_cg.alpha = 0f;
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}
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private void OnEnable()
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{
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_onSaveIndicatorVisible?.Subscribe(OnVisibilityChanged).AddTo(_subs);
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}
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private void OnDisable()
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{
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_subs.Clear();
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}
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private void OnVisibilityChanged(bool visible) => FadeTo(visible ? 1f : 0f);
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private void FadeTo(float target)
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{
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if (_fadeCoroutine != null) StopCoroutine(_fadeCoroutine);
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_fadeCoroutine = StartCoroutine(FadeCoroutine(target));
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}
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private IEnumerator FadeCoroutine(float target)
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{
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float start = _cg.alpha;
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float elapsed = 0f;
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while (elapsed < _fadeDuration)
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{
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_cg.alpha = Mathf.Lerp(start, target, elapsed / _fadeDuration);
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elapsed += Time.unscaledDeltaTime;
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yield return null;
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}
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_cg.alpha = target;
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}
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}
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}
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