Implement leaderboard chat display

osu.Game.Tests/Visual/Multiplayer/TestSceneMatchLeaderboardChatDisplay.cs

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+// 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 System;
+using System.Collections.Generic;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Screens.Multi.Match.Components;
+using osuTK;
+
+namespace osu.Game.Tests.Visual.Multiplayer
+{
+    public class TestSceneMatchLeaderboardChatDisplay : MultiplayerTestScene
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(LeaderboardChatDisplay)
+        };
+
+        protected override bool UseOnlineAPI => true;
+
+        public TestSceneMatchLeaderboardChatDisplay()
+        {
+            Room.RoomID.Value = 7;
+
+            Add(new Container
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                Size = new Vector2(500),
+                Child = new LeaderboardChatDisplay
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                }
+            });
+        }
+    }
+}

osu.Game/Screens/Multi/Match/Components/LeaderboardChatDisplay.cs

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+// 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.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.UserInterface;
+using osu.Game.Graphics;
+using osu.Game.Graphics.UserInterface;
+
+namespace osu.Game.Screens.Multi.Match.Components
+{
+    public class LeaderboardChatDisplay : MultiplayerComposite
+    {
+        private const double fade_duration = 100;
+
+        private readonly OsuTabControl<DisplayMode> tabControl;
+        private readonly MatchLeaderboard leaderboard;
+        private readonly MatchChatDisplay chat;
+
+        public LeaderboardChatDisplay()
+        {
+            RelativeSizeAxes = Axes.Both;
+
+            InternalChild = new GridContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+                Content = new[]
+                {
+                    new Drawable[]
+                    {
+                        tabControl = new DisplayModeTabControl
+                        {
+                            RelativeSizeAxes = Axes.X,
+                            Height = 24,
+                        }
+                    },
+                    new Drawable[]
+                    {
+                        new Container
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                            Padding = new MarginPadding { Top = 10 },
+                            Children = new Drawable[]
+                            {
+                                leaderboard = new MatchLeaderboard { RelativeSizeAxes = Axes.Both },
+                                chat = new MatchChatDisplay
+                                {
+                                    RelativeSizeAxes = Axes.Both,
+                                    Alpha = 0
+                                }
+                            }
+                        }
+                    },
+                },
+                RowDimensions = new[]
+                {
+                    new Dimension(GridSizeMode.AutoSize),
+                }
+            };
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            tabControl.AccentColour = colours.Yellow;
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            tabControl.Current.BindValueChanged(changeTab);
+        }
+
+        public void RefreshScores() => leaderboard.RefreshScores();
+
+        private void changeTab(ValueChangedEvent<DisplayMode> mode)
+        {
+            chat.FadeTo(mode.NewValue == DisplayMode.Chat ? 1 : 0, fade_duration);
+            leaderboard.FadeTo(mode.NewValue == DisplayMode.Leaderboard ? 1 : 0, fade_duration);
+        }
+
+        private class DisplayModeTabControl : OsuTabControl<DisplayMode>
+        {
+            protected override TabItem<DisplayMode> CreateTabItem(DisplayMode value) => base.CreateTabItem(value).With(d =>
+            {
+                d.Anchor = Anchor.Centre;
+                d.Origin = Anchor.Centre;
+            });
+        }
+
+        private enum DisplayMode
+        {
+            Leaderboard,
+            Chat,
+        }
+    }
+}