IdleRPG2024/Assets/_2_0Script/UI/ButtonGroup.cs

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

public class ButtonGroup : MonoBehaviour
{
    struct ButtonElement
    {
        public int idx;
        public Button button;
    }

    [SerializeField] ButtonIV[] buttons;
    [SerializeField] int selectableCount = 1;

    List<ButtonElement> selectedButtons = new List<ButtonElement>();

    public event Action<int, Button, bool> OnChangedButtonState;

    private void Awake()
    {
        for(int i = 0; i < buttons.Length; i++)
        {
            ButtonElement buttonElement = new ButtonElement();
            buttonElement.idx = i;
            buttonElement.button = buttons[i];

            buttonElement.button.onClick.AddListener(() => OnClickButton(buttonElement));
        }
    }

    private void OnClickButton(ButtonElement elm)
    {
        int removedCount = selectedButtons.RemoveAll((element) => element.idx == elm.idx);
        if (removedCount > 0)
        {
            elm.button.interactable = true;
            OnChangedButtonState?.Invoke(elm.idx, elm.button, false);
        }
        else if (selectedButtons.Count >= selectableCount)
        {
            var removedElm = selectedButtons[0];
            removedElm.button.interactable = true;
            selectedButtons.RemoveAt(0);
            OnChangedButtonState?.Invoke(removedElm.idx, removedElm.button, false);
        }

        elm.button.interactable = false;
        selectedButtons.Add(elm);
        OnChangedButtonState?.Invoke(elm.idx, elm.button, true);
    }

    public void SelectButton(int idx)
    {
        if (idx < 0 || idx >= buttons.Length) return;
        OnClickButton(new ButtonElement { idx = idx, button = buttons[idx] });
    }
}