CLre/CLre/Fixes/InventoryPanelScrollEngineFix.cs

using System;

using HarmonyLib;
using System.Reflection;
using UnityEngine;

namespace CLre.Fixes
{
       [Bugfix(name = "ScrollSpeedImprovement",
       description = "Improve mouse wheel scroll speed in inventory",
       more = "https://trello.com/c/elL8IVdn/4-scroll-menus-are-insensitive",
       component = BugfixType.HarmonyPatch, id = 5)]
        [HarmonyPatch]
        class InventoryPanelScrollEngine_ScrollPanelByMouseWheel_Patch
    {
            [HarmonyPrefix]
            public static bool BeforeMethodCall(ref object panelScrollComponent, ref float scrollValue)
            {
            if (panelScrollComponent == null) return true; // If it's null, we don't try to handle it.
            // We, perhaps dangerously, assume that we'll only get a panelScrollComponent.
            PropertyInfo scrollbar = panelScrollComponent.GetType().GetProperty("scrollbar", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            UnityEngine.UI.Scrollbar sb = scrollbar.GetValue(panelScrollComponent) as UnityEngine.UI.Scrollbar;
            float num = -scrollValue * (sb.size * 0.3f);
            float num2 = sb.value;
            num2 = Mathf.Clamp01(num2 + num);
            sb.value = num2;
            return false;   // Tell harmony not to invoke the original method
        }


        [HarmonyTargetMethod]
            public static MethodBase Target()
            {
                MethodInfo methodtopatch = AccessTools.Method("Game.UI.InventoryPanelScrollEngine:ScrollPanelByMouseWheel");
                if (null == methodtopatch) API.Utility.Logging.MetaLog("Intercepting Game.UI.InventoryPanelScrollEngine:ScrollPanelByMouseWheel() failed");
                return methodtopatch;
            }
        }
}