From 38de3566b14b4d08a17c806f2891fa85c82dfafd Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Fri, 28 Feb 2025 17:37:18 +0900
Subject: [PATCH] Adjust set panel display and animations slightly

---
 .../SelectV2/BeatmapSetPanelBackground.cs        |  2 +-
 osu.Game/Screens/SelectV2/PanelBase.cs           | 12 ++++++------
 osu.Game/Screens/SelectV2/PanelBeatmapSet.cs     | 16 +++++++++++-----
 3 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/osu.Game/Screens/SelectV2/BeatmapSetPanelBackground.cs b/osu.Game/Screens/SelectV2/BeatmapSetPanelBackground.cs
index 435a0ad262..798acf62ee 100644
--- a/osu.Game/Screens/SelectV2/BeatmapSetPanelBackground.cs
+++ b/osu.Game/Screens/SelectV2/BeatmapSetPanelBackground.cs
@@ -16,7 +16,7 @@ namespace osu.Game.Screens.SelectV2
 {
     public partial class BeatmapSetPanelBackground : ModelBackedDrawable<WorkingBeatmap>
     {
-        protected override bool TransformImmediately => true;
+        protected override double TransformDuration => 400;
 
         public WorkingBeatmap? Beatmap
         {
diff --git a/osu.Game/Screens/SelectV2/PanelBase.cs b/osu.Game/Screens/SelectV2/PanelBase.cs
index 36f4f13a3b..05a1a55c03 100644
--- a/osu.Game/Screens/SelectV2/PanelBase.cs
+++ b/osu.Game/Screens/SelectV2/PanelBase.cs
@@ -25,7 +25,7 @@ namespace osu.Game.Screens.SelectV2
 
         private const float active_x_offset = 50f;
 
-        private const float duration = 400;
+        protected const float DURATION = 400;
 
         protected float PanelXOffset { get; init; }
 
@@ -207,7 +207,7 @@ namespace osu.Game.Screens.SelectV2
         protected override void PrepareForUse()
         {
             base.PrepareForUse();
-            this.FadeInFromZero(duration, Easing.OutQuint);
+            this.FadeInFromZero(DURATION, Easing.OutQuint);
         }
 
         protected override bool OnClick(ClickEvent e)
@@ -221,10 +221,10 @@ namespace osu.Game.Screens.SelectV2
             var backgroundColour = accentColour ?? Color4.White;
             var edgeEffectColour = accentColour ?? Color4Extensions.FromHex(@"4EBFFF");
 
-            backgroundAccentGradient.FadeColour(ColourInfo.GradientHorizontal(backgroundColour.Opacity(0.25f), backgroundColour.Opacity(0f)), duration, Easing.OutQuint);
-            backgroundBorder.FadeColour(backgroundColour, duration, Easing.OutQuint);
+            backgroundAccentGradient.FadeColour(ColourInfo.GradientHorizontal(backgroundColour.Opacity(0.25f), backgroundColour.Opacity(0f)), DURATION, Easing.OutQuint);
+            backgroundBorder.FadeColour(backgroundColour, DURATION, Easing.OutQuint);
 
-            TopLevelContent.FadeEdgeEffectTo(Expanded.Value ? edgeEffectColour.Opacity(0.5f) : Color4.Black.Opacity(0.4f), duration, Easing.OutQuint);
+            TopLevelContent.FadeEdgeEffectTo(Expanded.Value ? edgeEffectColour.Opacity(0.5f) : Color4.Black.Opacity(0.4f), DURATION, Easing.OutQuint);
 
             updateXOffset();
             updateHover();
@@ -240,7 +240,7 @@ namespace osu.Game.Screens.SelectV2
             if (!KeyboardSelected.Value)
                 x += active_x_offset * 0.5f;
 
-            TopLevelContent.MoveToX(x, duration, Easing.OutQuint);
+            TopLevelContent.MoveToX(x, DURATION, Easing.OutQuint);
         }
 
         private void updateHover()
diff --git a/osu.Game/Screens/SelectV2/PanelBeatmapSet.cs b/osu.Game/Screens/SelectV2/PanelBeatmapSet.cs
index 5c38fe8e04..512fbacec1 100644
--- a/osu.Game/Screens/SelectV2/PanelBeatmapSet.cs
+++ b/osu.Game/Screens/SelectV2/PanelBeatmapSet.cs
@@ -48,7 +48,7 @@ namespace osu.Game.Screens.SelectV2
 
             Icon = chevronIcon = new Container
             {
-                Size = new Vector2(22),
+                Size = new Vector2(0, 22),
                 Child = new SpriteIcon
                 {
                     Anchor = Anchor.Centre,
@@ -128,10 +128,16 @@ namespace osu.Game.Screens.SelectV2
 
         private void onExpanded()
         {
-            const float duration = 500;
-
-            chevronIcon.ResizeWidthTo(Expanded.Value ? 22 : 0f, duration, Easing.OutQuint);
-            chevronIcon.FadeTo(Expanded.Value ? 1f : 0f, duration, Easing.OutQuint);
+            if (Expanded.Value)
+            {
+                chevronIcon.ResizeWidthTo(18, 600, Easing.OutElasticQuarter);
+                chevronIcon.FadeTo(1f, DURATION, Easing.OutQuint);
+            }
+            else
+            {
+                chevronIcon.ResizeWidthTo(0f, DURATION, Easing.OutQuint);
+                chevronIcon.FadeTo(0f, DURATION, Easing.OutQuint);
+            }
         }
 
         protected override void PrepareForUse()