ADOFAIRenderer/Patch/ClassPatch/scnEditorPatch.cs

using HarmonyLib;
using UnityEngine;
using UnityEngine.UI;

namespace ADOFAIRenderer.Patch.ClassPatch
{
    [HarmonyPatch(typeof(scnEditor))]
    // ReSharper disable once InconsistentNaming
    public static class scnEditorPatch
    {
        [HarmonyPostfix]
        [HarmonyPatch("Start")]
        // ReSharper disable once InconsistentNaming
        public static void AddButtonRender(scnEditor __instance)
        {
            var cloneTarget = __instance.buttonExit!.gameObject;
            var buttonContainer = cloneTarget.transform.parent!;
            
            var buttonObj = Object.Instantiate(cloneTarget, buttonContainer)!;
            buttonObj.name = "buttonRender";
            
            var button = buttonObj.GetComponent<Button>()!;
            // Clear persistent and non-persistent listeners from the original button
            button.onClick = new Button.ButtonClickedEvent();
            button.onClick.AddListener(RenderMod.StartRender);
            
            // The button root has an Image component for the background (rounded box).
            // We want to change the icon sprite, which is on a child GameObject.
            var images = buttonObj.GetComponentsInChildren<Image>();
            if (images.Length <= 1) return;
            
            // ReSharper disable once Unity.UnknownResource
            // images[0] is the background on the root, images[1] is the icon on the child
            var sprite = Resources.Load<Sprite>("LevelEditor/LevelEvents/MoveCamera");
            if (sprite != null)
            {
                var iconImage = images[1];
                iconImage.sprite = sprite;
                iconImage.rectTransform.sizeDelta = new Vector2(24, 24);
            }
        }
    }
}