Separate out Leaderboard into BeatmapLeaderboard

osu.Game/Online/Leaderboards/RetrievalFailurePlaceholder.cs

@@ -0,0 +1,64 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using osu.Framework.Graphics;
+using osu.Framework.Input.Events;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Containers;
+using osuTK;
+
+namespace osu.Game.Online.Leaderboards
+{
+    public class RetrievalFailurePlaceholder : Placeholder
+    {
+        public Action OnRetry;
+
+        public RetrievalFailurePlaceholder()
+        {
+            AddArbitraryDrawable(new RetryButton
+            {
+                Action = () => OnRetry?.Invoke(),
+                Padding = new MarginPadding { Right = 10 }
+            });
+
+            AddText(@"Couldn't retrieve scores!");
+        }
+
+        public class RetryButton : OsuHoverContainer
+        {
+            private readonly SpriteIcon icon;
+
+            public new Action Action;
+
+            public RetryButton()
+            {
+                AutoSizeAxes = Axes.Both;
+
+                Child = new OsuClickableContainer
+                {
+                    AutoSizeAxes = Axes.Both,
+                    Action = () => Action?.Invoke(),
+                    Child = icon = new SpriteIcon
+                    {
+                        Icon = FontAwesome.fa_refresh,
+                        Size = new Vector2(TEXT_SIZE),
+                        Shadow = true,
+                    },
+                };
+            }
+
+            protected override bool OnMouseDown(MouseDownEvent e)
+            {
+                icon.ScaleTo(0.8f, 4000, Easing.OutQuint);
+                return base.OnMouseDown(e);
+            }
+
+            protected override bool OnMouseUp(MouseUpEvent e)
+            {
+                icon.ScaleTo(1, 1000, Easing.OutElastic);
+                return base.OnMouseUp(e);
+            }
+        }
+    }
+}