From 59e5a8556f91b3a47a3d8088c1041331a3c243df Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Fri, 8 Jun 2018 18:15:03 +0900
Subject: [PATCH] Fix volume control adjustment being extreme when precision
 scrolling

---
 osu.Game/Overlays/Volume/VolumeMeter.cs | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/osu.Game/Overlays/Volume/VolumeMeter.cs b/osu.Game/Overlays/Volume/VolumeMeter.cs
index 64106967f4..b2cf43704b 100644
--- a/osu.Game/Overlays/Volume/VolumeMeter.cs
+++ b/osu.Game/Overlays/Volume/VolumeMeter.cs
@@ -167,9 +167,25 @@ namespace osu.Game.Overlays.Volume
             private set => Bindable.Value = value;
         }
 
-        public void Increase() => Volume += 0.05f;
+        private const float adjust_step = 0.05f;
 
-        public void Decrease() => Volume -= 0.05f;
+        public void Increase() => adjust(1);
+        public void Decrease() => adjust(-1);
+
+        private void adjust(int direction)
+        {
+            float amount = adjust_step * direction;
+
+            var mouse = GetContainingInputManager().CurrentState.Mouse;
+            if (mouse.HasPreciseScroll)
+            {
+                float scrollDelta = mouse.ScrollDelta.Y;
+                if (scrollDelta != 0)
+                    amount *= Math.Abs(scrollDelta / 10);
+            }
+
+            Volume += amount;
+        }
 
         public bool OnPressed(GlobalAction action)
         {