add player settings to multi spectator screen

osu.Game/Screens/OnlinePlay/Multiplayer/Spectate/MultiSpectatorScreen.cs

@@ -126,7 +126,8 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Spectate
                 syncManager = new SpectatorSyncManager(masterClockContainer)
                 {
                     ReadyToStart = performInitialSeek,
-                }
+                },
+                new MultiSpectatorSettings()
             };
 
             for (int i = 0; i < Users.Count; i++)

osu.Game/Screens/OnlinePlay/Multiplayer/Spectate/MultiSpectatorSettings.cs

@@ -0,0 +1,81 @@
+// 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.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Graphics.UserInterface;
+using osu.Game.Screens.Play.HUD;
+using osuTK;
+
+namespace osu.Game.Screens.OnlinePlay.Multiplayer.Spectate
+{
+    public partial class MultiSpectatorSettings : CompositeDrawable
+    {
+        private const double slide_duration = 200;
+
+        private readonly PlayerSettingsOverlay playerSettingsOverlay;
+        private readonly Container slidingContainer;
+
+        private readonly BindableBool opened = new BindableBool();
+
+        public MultiSpectatorSettings()
+        {
+            Origin = Anchor.TopLeft;
+            Anchor = Anchor.TopRight;
+            AutoSizeAxes = Axes.Both;
+
+            InternalChildren = new Drawable[]
+            {
+                slidingContainer = new Container
+                {
+                    Origin = Anchor.TopLeft,
+                    Anchor = Anchor.TopLeft,
+                    AutoSizeAxes = Axes.Both,
+                    Children = new Drawable[]
+                    {
+                        new IconButton
+                        {
+                            Icon = FontAwesome.Solid.Cog,
+                            Origin = Anchor.TopLeft,
+                            Anchor = Anchor.TopLeft,
+                            Scale = new Vector2(1f),
+                            Position = new Vector2(-30, 0),
+                            Action = () => opened.Toggle()
+                        },
+                        playerSettingsOverlay = new PlayerSettingsOverlay()
+                    }
+                }
+            };
+
+            playerSettingsOverlay.Show();
+
+            opened.BindValueChanged(value =>
+            {
+                if (value.NewValue)
+                    open();
+                else
+                    close();
+            });
+        }
+
+        private void open()
+        {
+            slidingContainer.MoveToOffset(new Vector2(-playerSettingsOverlay.Width, 0), slide_duration, Easing.Out).Then().OnComplete(c =>
+            {
+                c.Origin = Anchor.TopRight;
+                c.Position = Vector2.Zero;
+            });
+        }
+
+        private void close()
+        {
+            slidingContainer.MoveToOffset(new Vector2(playerSettingsOverlay.Width, 0), slide_duration, Easing.Out).Then().OnComplete(c =>
+            {
+                c.Origin = Anchor.TopLeft;
+                c.Position = Vector2.Zero;
+            });
+        }
+    }
+}