feat: Add quality settings dropdown

Author: jcs090218

Assets/JCSUnity/Scripts/UI/Dropdown/JCS_DropdownQuality.cs

@@ -0,0 +1,116 @@
+/**
+ * $File: JCS_DropdownQuality.cs $
+ * $Date: 2025-07-14 01:14:38 $
+ * $Revision: $
+ * $Creator: Jen-Chieh Shen $
+ * $Notice: See LICENSE.txt for modification and distribution information
+ *                   Copyright © 2025 by Shen, Jen-Chieh $
+ */
+using UnityEngine;
+using UnityEngine.UI;
+using TMPro;
+using MyBox;
+
+namespace JCSUnity
+{
+    /// <summary>
+    /// A dropdown menu let you choose the quality level.
+    /// </summary>
+    public class JCS_DropdownQuality : JCS_DropdownObject
+    {
+        /* Variables */
+
+        [Separator("Initialize Variables (JCS_DropdownQuality)")]
+
+        [Tooltip("If true, remove all other options at the beginning.")]
+        [SerializeField]
+        private bool mRemoveAllOptions = true;
+
+        [Separator("Runtime Variables (JCS_DropdownQuality)")]
+
+        [Tooltip("Should expensive changes be applied.")]
+        [SerializeField]
+        private bool mApplyExpensiveChanges = false;
+
+        /* Setter & Getter */
+
+        public bool RemoveAllOptions { get { return mRemoveAllOptions; } set { this.mRemoveAllOptions = value; } }
+        public bool ApplyExpensiveChanges { get { return mApplyExpensiveChanges; } set { this.mApplyExpensiveChanges = value; } }
+
+        /* Functions */
+
+        private void Start()
+        {
+            Refresh();
+
+            AddListener();
+        }
+
+        private void AddListener()
+        {
+            mDropdownLegacy?.onValueChanged.AddListener(delegate
+            {
+                OnValueChanged_Legacy(mDropdownLegacy);
+            });
+
+            mDropdownTMP?.onValueChanged.AddListener(delegate
+            {
+                OnValueChanged_TMP(mDropdownTMP);
+            });
+
+            // Run once.
+            OnValueChanged_Legacy(mDropdownLegacy);
+            OnValueChanged_TMP(mDropdownTMP);
+        }
+
+        /// <summary>
+        /// Refresh all options once.
+        /// </summary>
+        public void Refresh()
+        {
+            if (mRemoveAllOptions)
+                ClearOptions();
+
+            foreach (string option in QualitySettings.names)
+            {
+                JCS_UIUtil.Dropdown_AddOption(this, option);
+            }
+
+            // Default to the current quality level.
+            {
+                int level = QualitySettings.GetQualityLevel();
+
+                string text = QualitySettings.names[level];
+
+                JCS_UIUtil.Dropdown_SetSelection(this, text);
+            }
+
+            JCS_UIUtil.Dropdown_RefreshSelection(this);
+        }
+
+        private void OnValueChanged_Legacy(Dropdown dropdown)
+        {
+            if (dropdown == null)
+                return;
+
+            string text = JCS_UIUtil.Dropdown_GetSelectedValue(dropdown);
+
+            OnValueChanged(text);
+        }
+        private void OnValueChanged_TMP(TMP_Dropdown dropdown)
+        {
+            if (dropdown == null)
+                return;
+
+            string text = JCS_UIUtil.Dropdown_GetSelectedValue(dropdown);
+
+            OnValueChanged(text);
+        }
+        private void OnValueChanged(string text)
+        {
+            int level = QualitySettings.names.IndexOfItem(text);
+
+            QualitySettings.SetQualityLevel(level);
+        }
+    }
+}