Add ui scaling setup screen, kind of

osu.Game/Overlays/FirstRunSetup/ScreenSetupUIScale.cs

@@ -0,0 +1,87 @@
+// 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.Localisation;
+using osu.Framework.Screens;
+using osu.Game.Configuration;
+using osu.Game.Graphics.Containers;
+using osu.Game.Graphics.UserInterface;
+using osu.Game.Localisation;
+using osu.Game.Overlays.Settings;
+using osu.Game.Screens;
+using osu.Game.Screens.OnlinePlay.Match.Components;
+using osu.Game.Screens.Select;
+using osuTK;
+
+namespace osu.Game.Overlays.FirstRunSetup
+{
+    public class ScreenSetupUIScale : FirstRunSetupScreen
+    {
+        [Resolved]
+        private OsuConfigManager osuConfig { get; set; }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            OsuScreenStack stack;
+            Content.Children = new Drawable[]
+            {
+                new FillFlowContainer
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Direction = FillDirection.Vertical,
+                    Spacing = new Vector2(20),
+                    Children = new Drawable[]
+                    {
+                        new OsuTextFlowContainer
+                        {
+                            Text = "The osu! user interface size can be adjusted to your liking.",
+                            RelativeSizeAxes = Axes.X,
+                            AutoSizeAxes = Axes.Y
+                        },
+                        new SettingsSlider<float, UIScaleSlider>
+                        {
+                            LabelText = GraphicsSettingsStrings.UIScaling,
+                            TransferValueOnCommit = true,
+                            Current = osuConfig.GetBindable<float>(OsuSetting.UIScale),
+                            KeyboardStep = 0.01f,
+                        },
+                        new DrawSizePreservingFillContainer
+                        {
+                            Masking = true,
+                            RelativeSizeAxes = Axes.X,
+                            Height = 300,
+                            Child = stack = new OsuScreenStack()
+                        }
+                    }
+                },
+                new PurpleTriangleButton
+                {
+                    Anchor = Anchor.BottomCentre,
+                    Origin = Anchor.BottomCentre,
+                    RelativeSizeAxes = Axes.X,
+                    Margin = new MarginPadding(10),
+                    Text = "Finish",
+                    Action = () => Overlay.Hide()
+                }
+            };
+
+            stack.Push(new PlaySongSelect());
+        }
+
+        public override void OnEntering(IScreen last)
+        {
+            base.OnEntering(last);
+            Overlay.MoveDisplayTo(new Vector2(0.5f));
+            Overlay.ResizeDisplayTo(new Vector2(0.8f));
+        }
+
+        private class UIScaleSlider : OsuSliderBar<float>
+        {
+            public override LocalisableString TooltipText => base.TooltipText + "x";
+        }
+    }
+}

osu.Game/Overlays/FirstRunSetup/ScreenWelcome.cs

@@ -4,7 +4,6 @@
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Screens;
-using osu.Framework.Utils;
 using osu.Game.Graphics.Containers;
 using osu.Game.Screens.OnlinePlay.Match.Components;
 using osuTK;
@@ -38,7 +37,7 @@ namespace osu.Game.Overlays.FirstRunSetup
                     RelativeSizeAxes = Axes.X,
                     Margin = new MarginPadding(10),
                     Text = "Get started",
-                    Action = () => this.Push(new ScreenWelcome()),
+                    Action = () => this.Push(new ScreenSetupUIScale()),
                 }
             };
         }
@@ -46,13 +45,7 @@ namespace osu.Game.Overlays.FirstRunSetup
         public override void OnEntering(IScreen last)
         {
             base.OnEntering(last);
-            Overlay.MoveDisplayTo(new Vector2(RNG.NextSingle(), RNG.NextSingle()));
+            Overlay.MoveDisplayTo(new Vector2(0.5f));
-        }
-
-        public override void OnResuming(IScreen last)
-        {
-            base.OnResuming(last);
-            Overlay.MoveDisplayTo(new Vector2(RNG.NextSingle(), RNG.NextSingle()));
         }
     }
 }

osu.Game/Overlays/FirstRunSetupOverlay.cs

@@ -57,7 +57,8 @@ namespace osu.Game.Overlays
                 {
                     Origin = Anchor.Centre,
                     RelativePositionAxes = Axes.Both,
-                    Size = new Vector2(400, 300),
+                    RelativeSizeAxes = Axes.Both,
+                    Size = new Vector2(0.5f),
                     Position = new Vector2(0.5f),
                     EdgeEffect = new EdgeEffectParameters
                     {
@@ -130,5 +131,8 @@ namespace osu.Game.Overlays
 
         public void MoveDisplayTo(Vector2 position) =>
             currentDisplayContainer.MoveTo(position, 1000, Easing.OutElasticQuarter);
+
+        public void ResizeDisplayTo(Vector2 scale) =>
+            currentDisplayContainer.ScaleTo(scale, 1000, Easing.OutElasticQuarter);
     }
 }