AZTECH_WB/Assets/Scripts/UI/SettingPanel/GraphicsSettingItem.cs

using AZTECHWB.Extensions;
using TMPro;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.UI;

namespace AZTECHWB.UI
{
    public class GraphicsSettingItem : MonoBehaviour
    {
        TMP_Dropdown Dropdown_Value;
        Toggle Toggle_Value;

        bool isDropdownOpen;
        Image dropdownImage;
        Sprite dropdownNormalSprite;
        Sprite dropdownSelectedSprite;

        public void InitDropdown(UnityAction<int> onValueChanged)
        {
            transform.TryGetComponentInChildren(nameof(Dropdown_Value), out Dropdown_Value);
            Dropdown_Value.onValueChanged.AddListener(onValueChanged);

            dropdownImage = Dropdown_Value.targetGraphic as Image;
            dropdownNormalSprite = dropdownImage.sprite;
            dropdownSelectedSprite = Dropdown_Value.spriteState.selectedSprite;
        }

        public void InitToggle(UnityAction<bool> onValueChanged)
        {
            transform.TryGetComponentInChildren(nameof(Toggle_Value), out Toggle_Value);
            Toggle_Value.onValueChanged.AddListener(onValueChanged);
        }

        public void SetDropdownOptions(string[] options)
        {
            Dropdown_Value.ClearOptions();
            Dropdown_Value.AddOptions(new System.Collections.Generic.List<string>(options));
        }

        public void SetDropdownValue(int index)
        {
            Dropdown_Value.SetValueWithoutNotify(index);
        }

        public void SetToggleValue(bool value)
        {
            Toggle_Value.SetIsOnWithoutNotify(value);
        }

        void LateUpdate()
        {
            if (Dropdown_Value == null) return;

            var list = Dropdown_Value.transform.Find("Dropdown List");

            if (list != null && !isDropdownOpen)
            {
                isDropdownOpen = true;
                StyleDropdownItems(list);
            }

            if (isDropdownOpen)
            {
                if (list != null)
                {
                    dropdownImage.sprite = dropdownSelectedSprite;
                }
                else
                {
                    dropdownImage.sprite = dropdownNormalSprite;
                    isDropdownOpen = false;

                    var eventSystem = UnityEngine.EventSystems.EventSystem.current;
                    if (eventSystem != null)
                        eventSystem.SetSelectedGameObject(null);
                }
            }
        }

        void StyleDropdownItems(Transform list)
        {
            var content = list.Find("Viewport/Content");
            if (content == null) return;

            for (int i = 0; i < content.childCount; i++)
            {
                var item = content.GetChild(i);
                if (item.GetComponent<DropdownItemStyler>() == null)
                {
                    var styler = item.gameObject.AddComponent<DropdownItemStyler>();
                    styler.Init();
                }
            }
        }
    }
}