Implement CommentsShowMoreButton

osu.Game/Overlays/Comments/CommentsShowMoreButton.cs

@@ -0,0 +1,32 @@
+// 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 osu.Framework.Bindables;
+using osu.Game.Graphics;
+using osu.Game.Graphics.UserInterface;
+
+namespace osu.Game.Overlays.Comments
+{
+    public class CommentsShowMoreButton : ShowMoreButton
+    {
+        public readonly BindableInt Current = new BindableInt();
+
+        public CommentsShowMoreButton()
+        {
+            IdleColour = OsuColour.Gray(0.3f);
+            HoverColour = OsuColour.Gray(0.4f);
+            ChevronIconColour = OsuColour.Gray(0.5f);
+        }
+
+        protected override void LoadComplete()
+        {
+            Current.BindValueChanged(onCurrentChanged, true);
+            base.LoadComplete();
+        }
+
+        private void onCurrentChanged(ValueChangedEvent<int> count)
+        {
+            Text = $@"Show More ({count.NewValue})".ToUpper();
+        }
+    }
+}