From 218151bb3c7af0fe77b32e55757cc0079b40cce6 Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Wed, 12 Feb 2025 18:27:53 +0900
Subject: [PATCH] Flash footer freemod/freestyle buttons when active

---
 .../Screens/OnlinePlay/FooterButtonFreeMods.cs  |  2 ++
 .../Screens/OnlinePlay/FooterButtonFreestyle.cs |  4 ++--
 .../Screens/OnlinePlay/OnlinePlaySongSelect.cs  |  2 +-
 osu.Game/Screens/Select/FooterButton.cs         | 17 +++++++++++++++++
 4 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/osu.Game/Screens/OnlinePlay/FooterButtonFreeMods.cs b/osu.Game/Screens/OnlinePlay/FooterButtonFreeMods.cs
index 695ed74ab9..3605412b2b 100644
--- a/osu.Game/Screens/OnlinePlay/FooterButtonFreeMods.cs
+++ b/osu.Game/Screens/OnlinePlay/FooterButtonFreeMods.cs
@@ -26,6 +26,8 @@ namespace osu.Game.Screens.OnlinePlay
         public readonly Bindable<IReadOnlyList<Mod>> FreeMods = new Bindable<IReadOnlyList<Mod>>();
         public readonly IBindable<bool> Freestyle = new Bindable<bool>();
 
+        protected override bool IsActive => FreeMods.Value.Count > 0;
+
         public new Action Action { set => throw new NotSupportedException("The click action is handled by the button itself."); }
 
         private OsuSpriteText count = null!;
diff --git a/osu.Game/Screens/OnlinePlay/FooterButtonFreestyle.cs b/osu.Game/Screens/OnlinePlay/FooterButtonFreestyle.cs
index d907fec489..6ee983af20 100644
--- a/osu.Game/Screens/OnlinePlay/FooterButtonFreestyle.cs
+++ b/osu.Game/Screens/OnlinePlay/FooterButtonFreestyle.cs
@@ -8,11 +8,10 @@ using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
-using osu.Framework.Graphics.UserInterface;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
-using osu.Game.Screens.Select;
 using osu.Game.Localisation;
+using osu.Game.Screens.Select;
 
 namespace osu.Game.Screens.OnlinePlay
 {
@@ -20,6 +19,7 @@ namespace osu.Game.Screens.OnlinePlay
     {
         public readonly Bindable<bool> Freestyle = new Bindable<bool>();
 
+        protected override bool IsActive => Freestyle.Value;
 
         public new Action Action { set => throw new NotSupportedException("The click action is handled by the button itself."); }
 
diff --git a/osu.Game/Screens/OnlinePlay/OnlinePlaySongSelect.cs b/osu.Game/Screens/OnlinePlay/OnlinePlaySongSelect.cs
index cf351b31bf..9bedecc221 100644
--- a/osu.Game/Screens/OnlinePlay/OnlinePlaySongSelect.cs
+++ b/osu.Game/Screens/OnlinePlay/OnlinePlaySongSelect.cs
@@ -42,7 +42,7 @@ namespace osu.Game.Screens.OnlinePlay
         protected override UserActivity InitialActivity => new UserActivity.InLobby(room);
 
         protected readonly Bindable<IReadOnlyList<Mod>> FreeMods = new Bindable<IReadOnlyList<Mod>>(Array.Empty<Mod>());
-        protected readonly Bindable<bool> Freestyle = new Bindable<bool>();
+        protected readonly Bindable<bool> Freestyle = new Bindable<bool>(true);
 
         private readonly Room room;
         private readonly PlaylistItem? initialItem;
diff --git a/osu.Game/Screens/Select/FooterButton.cs b/osu.Game/Screens/Select/FooterButton.cs
index 128e750dca..dafa0b0c1c 100644
--- a/osu.Game/Screens/Select/FooterButton.cs
+++ b/osu.Game/Screens/Select/FooterButton.cs
@@ -25,6 +25,11 @@ namespace osu.Game.Screens.Select
 
         protected static readonly Vector2 SHEAR = new Vector2(SHEAR_WIDTH / Footer.HEIGHT, 0);
 
+        /// <summary>
+        /// Used to show an initial animation hinting at the enabled state.
+        /// </summary>
+        protected virtual bool IsActive => false;
+
         public LocalisableString Text
         {
             get => SpriteText?.Text ?? default;
@@ -124,6 +129,18 @@ namespace osu.Game.Screens.Select
         {
             base.LoadComplete();
             Enabled.BindValueChanged(_ => updateDisplay(), true);
+
+            if (IsActive)
+            {
+                box.ClearTransforms();
+
+                using (box.BeginDelayedSequence(200))
+                {
+                    box.FadeIn(200)
+                       .Then()
+                       .FadeOut(1500, Easing.OutQuint);
+                }
+            }
         }
 
         public Action Hovered;