init: version 1

Assets/Prefabs/UI/Scripts/HelpTextManager.cs

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+using System.Collections;
+using System.Collections.Generic;
+using TMPro;
+using UnityEngine;
+
+/// <summary>
+/// HelpTextManager manages the display of help text messages in the UI.
+/// </summary>
+[RequireComponent(typeof(TextMeshProUGUI))]
+public class HelpTextManager : MonoBehaviour
+{
+    public static HelpTextManager Instance => _instance;
+    private static HelpTextManager _instance;
+    
+    [Header("Display Settings")]
+    public float displayTime = 5f;
+    public float fadeDuration = .5f;
+
+    private Queue<string> _helpMessages;
+    private TextMeshProUGUI _textMesh;
+    private Coroutine _currentCoroutine;
+
+    private void Awake()
+    {
+        if (_instance != null && _instance != this)
+        {
+            Destroy(gameObject);
+            return;
+        }
+        _instance = this;
+        _textMesh = GetComponent<TextMeshProUGUI>();
+    }
+
+    public void DisplayHelpText(string[] text)
+    {
+        _helpMessages = new Queue<string>(text);
+        if (_currentCoroutine != null) StopCoroutine(_currentCoroutine);
+        _currentCoroutine = StartCoroutine(CycleMessages());
+    }
+    
+    private IEnumerator CycleMessages()
+    {
+        while (_helpMessages.Count > 0)
+        {
+            _textMesh.text = _helpMessages.Dequeue();
+            _textMesh.alpha = 1f;
+            yield return new WaitForSeconds(displayTime);
+        }
+        yield return StartCoroutine(FadeOut());
+    }
+
+    private IEnumerator FadeOut()
+    {
+        float elapsed = 0f;
+        float startAlpha = _textMesh.alpha;
+
+        while (elapsed < fadeDuration)
+        {
+            elapsed += Time.deltaTime;
+            _textMesh.alpha = Mathf.Lerp(startAlpha, 0f, elapsed / fadeDuration);
+            yield return null;
+        }
+
+        _textMesh.alpha = 0f;
+    }
+}