Add control to allow changing offset from gameplay

osu.Game/Screens/Play/GameplayOffsetControl.cs

@@ -0,0 +1,104 @@
+// 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.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Threading;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Containers;
+using osu.Game.Overlays;
+using osu.Game.Screens.Play.PlayerSettings;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Screens.Play
+{
+    /// <summary>
+    /// This provides the ability to change the offset while in gameplay.
+    /// Eventually this should be replaced with all settings from PlayerLoader being accessible from the game.
+    /// </summary>
+    internal partial class GameplayOffsetControl : VisibilityContainer
+    {
+        protected override bool StartHidden => true;
+
+        public override bool PropagateNonPositionalInputSubTree => true;
+
+        private BeatmapOffsetControl offsetControl = null!;
+
+        private OsuTextFlowContainer text = null!;
+
+        private ScheduledDelegate? hideOp;
+
+        public GameplayOffsetControl()
+        {
+            AutoSizeAxes = Axes.Y;
+            Width = SettingsToolboxGroup.CONTAINER_WIDTH;
+
+            Masking = true;
+            CornerRadius = 5;
+
+            // Allow BeatmapOffsetControl to handle keyboard input.
+            AlwaysPresent = true;
+
+            Anchor = Anchor.CentreRight;
+            Origin = Anchor.CentreRight;
+
+            X = 100;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OverlayColourProvider? colourProvider)
+        {
+            InternalChildren = new Drawable[]
+            {
+                new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Alpha = 0.8f,
+                    Colour = colourProvider?.Background4 ?? Color4.Black,
+                },
+                new FillFlowContainer
+                {
+                    RelativeSizeAxes = Axes.X,
+                    AutoSizeAxes = Axes.Y,
+                    Padding = new MarginPadding(10),
+                    Spacing = new Vector2(5),
+                    Direction = FillDirection.Vertical,
+                    Children = new Drawable[]
+                    {
+                        offsetControl = new BeatmapOffsetControl(),
+                        text = new OsuTextFlowContainer(cp => cp.Font = OsuFont.Default.With(weight: FontWeight.SemiBold))
+                        {
+                            RelativeSizeAxes = Axes.X,
+                            AutoSizeAxes = Axes.Y,
+                            TextAnchor = Anchor.TopCentre,
+                        }
+                    }
+                },
+            };
+
+            offsetControl.Current.BindValueChanged(val =>
+            {
+                text.Text = BeatmapOffsetControl.GetOffsetExplanatoryText(val.NewValue);
+                Show();
+
+                hideOp?.Cancel();
+                hideOp = Scheduler.AddDelayed(Hide, 500);
+            });
+        }
+
+        protected override void PopIn()
+        {
+            this.FadeIn(500, Easing.OutQuint)
+                .MoveToX(0, 500, Easing.OutQuint);
+        }
+
+        protected override void PopOut()
+        {
+            this.FadeOut(500, Easing.InQuint)
+                .MoveToX(100, 500, Easing.InQuint);
+        }
+    }
+}

osu.Game/Screens/Play/Player.cs

@@ -461,6 +461,12 @@ namespace osu.Game.Screens.Play
                         OnRetry = () => Restart(),
                         OnQuit = () => PerformExit(true),
                     },
+                    new GameplayOffsetControl
+                    {
+                        Margin = new MarginPadding(20),
+                        Anchor = Anchor.CentreRight,
+                        Origin = Anchor.CentreRight,
+                    }
                 },
             };