Move DimmedLoadingAnimation to it's own file

osu.Game/Graphics/UserInterface/DimmedLoadingAnimation.cs

@@ -0,0 +1,44 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osuTK.Graphics;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Extensions.Color4Extensions;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    public class DimmedLoadingAnimation : VisibilityContainer
+    {
+        private const float transition_duration = 250;
+
+        private readonly LoadingAnimation loading;
+
+        public DimmedLoadingAnimation()
+        {
+            RelativeSizeAxes = Axes.Both;
+            Children = new Drawable[]
+            {
+                new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Colour = Color4.Black.Opacity(0.5f),
+                },
+                loading = new LoadingAnimation(),
+            };
+        }
+
+        protected override void PopIn()
+        {
+            this.FadeIn(transition_duration, Easing.OutQuint);
+            loading.Show();
+        }
+
+        protected override void PopOut()
+        {
+            this.FadeOut(transition_duration, Easing.OutQuint);
+            loading.Hide();
+        }
+    }
+}

osu.Game/Screens/Select/BeatmapDetails.cs

@@ -156,10 +156,7 @@ namespace osu.Game.Screens.Select
                         },
                     },
                 },
-                loading = new DimmedLoadingAnimation
+                loading = new DimmedLoadingAnimation(),
-                {
-                    RelativeSizeAxes = Axes.Both,
-                },
             };
         }
 
@@ -365,35 +362,5 @@ namespace osu.Game.Screens.Select
                 });
             }
         }
-
-        private class DimmedLoadingAnimation : VisibilityContainer
-        {
-            private readonly LoadingAnimation loading;
-
-            public DimmedLoadingAnimation()
-            {
-                Children = new Drawable[]
-                {
-                    new Box
-                    {
-                        RelativeSizeAxes = Axes.Both,
-                        Colour = Color4.Black.Opacity(0.5f),
-                    },
-                    loading = new LoadingAnimation(),
-                };
-            }
-
-            protected override void PopIn()
-            {
-                this.FadeIn(transition_duration, Easing.OutQuint);
-                loading.Show();
-            }
-
-            protected override void PopOut()
-            {
-                this.FadeOut(transition_duration, Easing.OutQuint);
-                loading.Hide();
-            }
-        }
     }
 }