From 59420721285e2e9b52398be20f786ed87165bd2e Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Thu, 9 May 2019 18:05:28 +0900
Subject: [PATCH] Add a tween when clicking to seek

---
 osu.Game/Screens/Play/SongProgressBar.cs | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/osu.Game/Screens/Play/SongProgressBar.cs b/osu.Game/Screens/Play/SongProgressBar.cs
index 2e7d452fe7..8ee2c0aa74 100644
--- a/osu.Game/Screens/Play/SongProgressBar.cs
+++ b/osu.Game/Screens/Play/SongProgressBar.cs
@@ -8,6 +8,7 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Graphics.UserInterface;
+using osu.Framework.MathUtils;
 
 namespace osu.Game.Screens.Play
 {
@@ -107,9 +108,17 @@ namespace osu.Game.Screens.Play
 
         protected override void UpdateValue(float value)
         {
-            var xFill = value * UsableWidth;
-            fill.Width = xFill;
-            handleBase.X = xFill;
+            // handled in update
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            float newX = (float)Interpolation.Lerp(handleBase.X, NormalizedValue * UsableWidth, Time.Elapsed / 40);
+
+            fill.Width = newX;
+            handleBase.X = newX;
         }
 
         protected override void OnUserChange(double value) => OnSeek?.Invoke(value);