Merge branch 'master' into show-mod-settings-tooltip

osu.Game.Rulesets.Osu.Tests/TestSceneHitCircleArea.cs

@@ -4,29 +4,25 @@
 using System;
 using NUnit.Framework;
 using osu.Framework.Graphics;
-using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Skinning;
+using osu.Game.Tests.Visual;
 using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Tests
 {
-    public class TestSceneHitCircleArea : ManualInputManagerTestScene
+    public class TestSceneHitCircleArea : OsuManualInputManagerTestScene
     {
         private HitCircle hitCircle;
         private DrawableHitCircle drawableHitCircle;
         private DrawableHitCircle.HitReceptor hitAreaReceptor => drawableHitCircle.HitArea;
 
         [SetUp]
-        public new void SetUp()
+        public void SetUp() => Schedule(() =>
-        {
-            base.SetUp();
-
-            Schedule(() =>
         {
             hitCircle = new HitCircle
             {
@@ -45,7 +41,6 @@ namespace osu.Game.Rulesets.Osu.Tests
                 }
             };
         });
-        }
 
         [Test]
         public void TestCircleHitCentre()

osu.Game.Rulesets.Osu.Tests/TestSceneOsuDistanceSnapGrid.cs

@@ -23,7 +23,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Osu.Tests
 {
-    public class TestSceneOsuDistanceSnapGrid : ManualInputManagerTestScene
+    public class TestSceneOsuDistanceSnapGrid : OsuManualInputManagerTestScene
     {
         private const double beat_length = 100;
         private static readonly Vector2 grid_position = new Vector2(512, 384);

osu.Game.Rulesets.Osu.Tests/TestSceneResumeOverlay.cs

@@ -12,7 +12,7 @@ using osu.Game.Tests.Visual;
 
 namespace osu.Game.Rulesets.Osu.Tests
 {
-    public class TestSceneResumeOverlay : ManualInputManagerTestScene
+    public class TestSceneResumeOverlay : OsuManualInputManagerTestScene
     {
         public override IReadOnlyList<Type> RequiredTypes => new[]
         {

osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/SpinnerDisc.cs

@@ -126,7 +126,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
                     .FadeTo(tracking_alpha, 250, Easing.OutQuint);
             }
 
-            this.RotateTo(currentRotation / 2, validAndTracking ? 500 : 1500, Easing.OutExpo);
+            Rotation = (float)Interpolation.Lerp(Rotation, currentRotation / 2, Math.Clamp(Math.Abs(Time.Elapsed) / 40, 0, 1));
         }
     }
 }

osu.Game.Rulesets.Taiko.Tests/Mods/TestSceneTaikoModPerfect.cs

@@ -19,7 +19,7 @@ namespace osu.Game.Rulesets.Taiko.Tests.Mods
 
         [TestCase(false)]
         [TestCase(true)]
-        public void TestHit(bool shouldMiss) => CreateHitObjectTest(new HitObjectTestData(new CentreHit { StartTime = 1000 }), shouldMiss);
+        public void TestHit(bool shouldMiss) => CreateHitObjectTest(new HitObjectTestData(new Hit { StartTime = 1000, Type = HitType.Centre }), shouldMiss);
 
         [TestCase(false)]
         [TestCase(true)]

osu.Game.Rulesets.Taiko.Tests/TaikoBeatmapConversionTest.cs

@@ -27,8 +27,8 @@ namespace osu.Game.Rulesets.Taiko.Tests
             {
                 StartTime = hitObject.StartTime,
                 EndTime = hitObject.GetEndTime(),
-                IsRim = hitObject is RimHit,
+                IsRim = (hitObject as Hit)?.Type == HitType.Rim,
-                IsCentre = hitObject is CentreHit,
+                IsCentre = (hitObject as Hit)?.Type == HitType.Centre,
                 IsDrumRoll = hitObject is DrumRoll,
                 IsSwell = hitObject is Swell,
                 IsStrong = ((TaikoHitObject)hitObject).IsStrong

osu.Game.Rulesets.Taiko.Tests/TestSceneTaikoPlayfield.cs

@@ -69,7 +69,7 @@ namespace osu.Game.Rulesets.Taiko.Tests
 
             WorkingBeatmap beatmap = CreateWorkingBeatmap(new Beatmap
             {
-                HitObjects = new List<HitObject> { new CentreHit() },
+                HitObjects = new List<HitObject> { new Hit { Type = HitType.Centre } },
                 BeatmapInfo = new BeatmapInfo
                 {
                     BaseDifficulty = new BeatmapDifficulty(),

osu.Game.Rulesets.Taiko/Beatmaps/TaikoBeatmapConverter.cs

@@ -124,24 +124,13 @@ namespace osu.Game.Rulesets.Taiko.Beatmaps
                             bool isRim = currentSamples.Any(s => s.Name == HitSampleInfo.HIT_CLAP || s.Name == HitSampleInfo.HIT_WHISTLE);
                             strong = currentSamples.Any(s => s.Name == HitSampleInfo.HIT_FINISH);
 
-                            if (isRim)
+                            yield return new Hit
-                            {
-                                yield return new RimHit
                             {
                                 StartTime = j,
+                                Type = isRim ? HitType.Rim : HitType.Centre,
                                 Samples = currentSamples,
                                 IsStrong = strong
                             };
-                            }
-                            else
-                            {
-                                yield return new CentreHit
-                                {
-                                    StartTime = j,
-                                    Samples = currentSamples,
-                                    IsStrong = strong
-                                };
-                            }
 
                             i = (i + 1) % allSamples.Count;
                         }
@@ -180,24 +169,13 @@ namespace osu.Game.Rulesets.Taiko.Beatmaps
                 {
                     bool isRim = samples.Any(s => s.Name == HitSampleInfo.HIT_CLAP || s.Name == HitSampleInfo.HIT_WHISTLE);
 
-                    if (isRim)
+                    yield return new Hit
-                    {
-                        yield return new RimHit
                     {
                         StartTime = obj.StartTime,
+                        Type = isRim ? HitType.Rim : HitType.Centre,
                         Samples = obj.Samples,
                         IsStrong = strong
                     };
-                    }
-                    else
-                    {
-                        yield return new CentreHit
-                        {
-                            StartTime = obj.StartTime,
-                            Samples = obj.Samples,
-                            IsStrong = strong
-                        };
-                    }
 
                     break;
                 }

osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/TaikoDifficultyHitObject.cs

@@ -14,7 +14,7 @@ namespace osu.Game.Rulesets.Taiko.Difficulty.Preprocessing
         public TaikoDifficultyHitObject(HitObject hitObject, HitObject lastObject, double clockRate)
             : base(hitObject, lastObject, clockRate)
         {
-            HasTypeChange = lastObject is RimHit != hitObject is RimHit;
+            HasTypeChange = (lastObject as Hit)?.Type != (hitObject as Hit)?.Type;
         }
     }
 }

osu.Game.Rulesets.Taiko/Objects/CentreHit.cs

@@ -1,9 +0,0 @@
-// 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.
-
-namespace osu.Game.Rulesets.Taiko.Objects
-{
-    public class CentreHit : Hit
-    {
-    }
-}

osu.Game.Rulesets.Taiko/Objects/Hit.cs

@@ -5,5 +5,9 @@ namespace osu.Game.Rulesets.Taiko.Objects
 {
     public class Hit : TaikoHitObject
     {
+        /// <summary>
+        /// The <see cref="HitType"/> that actuates this <see cref="Hit"/>.
+        /// </summary>
+        public HitType Type { get; set; }
     }
 }

osu.Game.Rulesets.Taiko/Objects/HitType.cs

@@ -0,0 +1,21 @@
+// 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.
+
+namespace osu.Game.Rulesets.Taiko.Objects
+{
+    /// <summary>
+    /// The type of a <see cref="Hit"/>.
+    /// </summary>
+    public enum HitType
+    {
+        /// <summary>
+        /// A <see cref="Hit"/> that can be hit by the centre portion of the drum.
+        /// </summary>
+        Centre,
+
+        /// <summary>
+        /// A <see cref="Hit"/> that can be hit by the rim portion of the drum.
+        /// </summary>
+        Rim
+    }
+}

osu.Game.Rulesets.Taiko/Objects/RimHit.cs

@@ -1,9 +0,0 @@
-// 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.
-
-namespace osu.Game.Rulesets.Taiko.Objects
-{
-    public class RimHit : Hit
-    {
-    }
-}

osu.Game.Rulesets.Taiko/Replays/TaikoAutoGenerator.cs

@@ -97,7 +97,7 @@ namespace osu.Game.Rulesets.Taiko.Replays
                     {
                         TaikoAction[] actions;
 
-                        if (hit is CentreHit)
+                        if (hit.Type == HitType.Centre)
                         {
                             actions = h.IsStrong
                                 ? new[] { TaikoAction.LeftCentre, TaikoAction.RightCentre }

osu.Game.Rulesets.Taiko/UI/DrawableTaikoRuleset.cs

@@ -48,11 +48,11 @@ namespace osu.Game.Rulesets.Taiko.UI
         {
             switch (h)
             {
-                case CentreHit centreHit:
+                case Hit hit:
-                    return new DrawableCentreHit(centreHit);
+                    if (hit.Type == HitType.Centre)
-
+                        return new DrawableCentreHit(hit);
-                case RimHit rimHit:
+                    else
-                    return new DrawableRimHit(rimHit);
+                        return new DrawableRimHit(hit);
 
                 case DrumRoll drumRoll:
                     return new DrawableDrumRoll(drumRoll);

osu.Game.Rulesets.Taiko/UI/TaikoPlayfield.cs

@@ -14,9 +14,9 @@ using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.UI;
 using osu.Game.Rulesets.UI.Scrolling;
-using osu.Game.Rulesets.Taiko.Objects;
 using osu.Game.Rulesets.Taiko.Objects.Drawables;
 using osu.Game.Rulesets.Taiko.Judgements;
+using osu.Game.Rulesets.Taiko.Objects;
 using osuTK;
 using osuTK.Graphics;
 
@@ -245,7 +245,7 @@ namespace osu.Game.Rulesets.Taiko.UI
                     if (!result.IsHit)
                         break;
 
-                    bool isRim = judgedObject.HitObject is RimHit;
+                    bool isRim = (judgedObject.HitObject as Hit)?.Type == HitType.Rim;
 
                     hitExplosionContainer.Add(new HitExplosion(judgedObject, isRim));
 

osu.Game.Tests/Visual/Background/TestSceneUserDimBackgrounds.cs

@@ -37,7 +37,7 @@ using osuTK.Graphics;
 namespace osu.Game.Tests.Visual.Background
 {
     [TestFixture]
-    public class TestSceneUserDimBackgrounds : ManualInputManagerTestScene
+    public class TestSceneUserDimBackgrounds : OsuManualInputManagerTestScene
     {
         public override IReadOnlyList<Type> RequiredTypes => new[]
         {
@@ -278,6 +278,7 @@ namespace osu.Game.Tests.Visual.Background
 
         private void setupUserSettings()
         {
+            AddUntilStep("Song select is current", () => songSelect.IsCurrentScreen());
             AddUntilStep("Song select has selection", () => songSelect.Carousel?.SelectedBeatmap != null);
             AddStep("Set default user settings", () =>
             {

osu.Game.Tests/Visual/Components/TestSceneIdleTracker.cs

@@ -12,7 +12,7 @@ using osuTK.Graphics;
 namespace osu.Game.Tests.Visual.Components
 {
     [TestFixture]
-    public class TestSceneIdleTracker : ManualInputManagerTestScene
+    public class TestSceneIdleTracker : OsuManualInputManagerTestScene
     {
         private IdleTrackingBox box1;
         private IdleTrackingBox box2;

osu.Game.Tests/Visual/Editor/TestSceneBeatDivisorControl.cs

@@ -16,7 +16,7 @@ using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Editor
 {
-    public class TestSceneBeatDivisorControl : ManualInputManagerTestScene
+    public class TestSceneBeatDivisorControl : OsuManualInputManagerTestScene
     {
         public override IReadOnlyList<Type> RequiredTypes => new[] { typeof(BindableBeatDivisor) };
         private BeatDivisorControl beatDivisorControl;

osu.Game.Tests/Visual/Editor/TestSceneZoomableScrollContainer.cs

@@ -17,7 +17,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Tests.Visual.Editor
 {
-    public class TestSceneZoomableScrollContainer : ManualInputManagerTestScene
+    public class TestSceneZoomableScrollContainer : OsuManualInputManagerTestScene
     {
         private ZoomableScrollContainer scrollContainer;
         private Drawable innerBox;

osu.Game.Tests/Visual/Gameplay/TestSceneGameplayMenuOverlay.cs

@@ -18,7 +18,7 @@ using osuTK.Input;
 namespace osu.Game.Tests.Visual.Gameplay
 {
     [Description("player pause/fail screens")]
-    public class TestSceneGameplayMenuOverlay : ManualInputManagerTestScene
+    public class TestSceneGameplayMenuOverlay : OsuManualInputManagerTestScene
     {
         public override IReadOnlyList<Type> RequiredTypes => new[] { typeof(FailOverlay), typeof(PauseOverlay) };
 

osu.Game.Tests/Visual/Gameplay/TestSceneHUDOverlay.cs

@@ -15,7 +15,7 @@ using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Gameplay
 {
-    public class TestSceneHUDOverlay : ManualInputManagerTestScene
+    public class TestSceneHUDOverlay : OsuManualInputManagerTestScene
     {
         private HUDOverlay hudOverlay;
 

osu.Game.Tests/Visual/Gameplay/TestSceneHoldForMenuButton.cs

@@ -13,7 +13,7 @@ using osuTK.Input;
 namespace osu.Game.Tests.Visual.Gameplay
 {
     [Description("'Hold to Quit' UI element")]
-    public class TestSceneHoldForMenuButton : ManualInputManagerTestScene
+    public class TestSceneHoldForMenuButton : OsuManualInputManagerTestScene
     {
         private bool exitAction;
 

osu.Game.Tests/Visual/Gameplay/TestSceneKeyCounter.cs

@@ -13,7 +13,7 @@ using osuTK.Input;
 namespace osu.Game.Tests.Visual.Gameplay
 {
     [TestFixture]
-    public class TestSceneKeyCounter : ManualInputManagerTestScene
+    public class TestSceneKeyCounter : OsuManualInputManagerTestScene
     {
         public override IReadOnlyList<Type> RequiredTypes => new[]
         {

osu.Game.Tests/Visual/Gameplay/TestScenePlayerLoader.cs

@@ -29,7 +29,7 @@ using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Gameplay
 {
-    public class TestScenePlayerLoader : ManualInputManagerTestScene
+    public class TestScenePlayerLoader : OsuManualInputManagerTestScene
     {
         private TestPlayerLoader loader;
         private TestPlayerLoaderContainer container;

osu.Game.Tests/Visual/Gameplay/TestSceneSkipOverlay.cs

@@ -14,7 +14,7 @@ using osuTK.Input;
 namespace osu.Game.Tests.Visual.Gameplay
 {
     [TestFixture]
-    public class TestSceneSkipOverlay : ManualInputManagerTestScene
+    public class TestSceneSkipOverlay : OsuManualInputManagerTestScene
     {
         private SkipOverlay skip;
         private int requestCount;

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

@@ -20,7 +20,7 @@ using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
-    public class TestSceneDrawableRoomPlaylist : ManualInputManagerTestScene
+    public class TestSceneDrawableRoomPlaylist : OsuManualInputManagerTestScene
     {
         public override IReadOnlyList<Type> RequiredTypes => new[]
         {

osu.Game.Tests/Visual/Navigation/OsuGameTestScene.cs

@@ -27,7 +27,7 @@ namespace osu.Game.Tests.Visual.Navigation
     /// <summary>
     /// A scene which tests full game flow.
     /// </summary>
-    public abstract class OsuGameTestScene : ManualInputManagerTestScene
+    public abstract class OsuGameTestScene : OsuManualInputManagerTestScene
     {
         private GameHost host;
 

osu.Game.Tests/Visual/Online/TestSceneChatOverlay.cs

@@ -22,7 +22,7 @@ using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Online
 {
-    public class TestSceneChatOverlay : ManualInputManagerTestScene
+    public class TestSceneChatOverlay : OsuManualInputManagerTestScene
     {
         public override IReadOnlyList<Type> RequiredTypes => new[]
         {

osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapCarousel.cs

@@ -227,6 +227,34 @@ namespace osu.Game.Tests.Visual.SongSelect
             waitForSelection(set_count);
         }
 
+        [Test]
+        public void TestSelectionEnteringFromEmptyRuleset()
+        {
+            var sets = new List<BeatmapSetInfo>();
+
+            AddStep("Create beatmaps for taiko only", () =>
+            {
+                sets.Clear();
+
+                var rulesetBeatmapSet = createTestBeatmapSet(1);
+                var taikoRuleset = rulesets.AvailableRulesets.ElementAt(1);
+                rulesetBeatmapSet.Beatmaps.ForEach(b =>
+                {
+                    b.Ruleset = taikoRuleset;
+                    b.RulesetID = 1;
+                });
+
+                sets.Add(rulesetBeatmapSet);
+            });
+
+            loadBeatmaps(sets, () => new FilterCriteria { Ruleset = rulesets.AvailableRulesets.ElementAt(0) });
+
+            AddStep("Set non-empty mode filter", () =>
+                carousel.Filter(new FilterCriteria { Ruleset = rulesets.AvailableRulesets.ElementAt(1) }, false));
+
+            AddAssert("Something is selected", () => carousel.SelectedBeatmap != null);
+        }
+
         /// <summary>
         /// Test sorting
         /// </summary>
@@ -399,27 +427,32 @@ namespace osu.Game.Tests.Visual.SongSelect
             AddStep("filter to ruleset 0", () =>
                 carousel.Filter(new FilterCriteria { Ruleset = rulesets.AvailableRulesets.ElementAt(0) }, false));
             AddStep("select filtered map skipping filtered", () => carousel.SelectBeatmap(testMixed.Beatmaps[1], false));
-            AddAssert("unfiltered beatmap not selected", () => carousel.SelectedBeatmap == null);
+            AddAssert("unfiltered beatmap not selected", () => carousel.SelectedBeatmap.RulesetID == 0);
 
             AddStep("remove mixed set", () =>
             {
                 carousel.RemoveBeatmapSet(testMixed);
                 testMixed = null;
             });
-            var testSingle = createTestBeatmapSet(set_count + 2);
+            BeatmapSetInfo testSingle = null;
+            AddStep("add single ruleset beatmapset", () =>
+            {
+                testSingle = createTestBeatmapSet(set_count + 2);
                 testSingle.Beatmaps.ForEach(b =>
                 {
                     b.Ruleset = rulesets.AvailableRulesets.ElementAt(1);
                     b.RulesetID = b.Ruleset.ID ?? 1;
                 });
-            AddStep("add single ruleset beatmapset", () => carousel.UpdateBeatmapSet(testSingle));
+
+                carousel.UpdateBeatmapSet(testSingle);
+            });
             AddStep("select filtered map skipping filtered", () => carousel.SelectBeatmap(testSingle.Beatmaps[0], false));
             checkNoSelection();
             AddStep("remove single ruleset set", () => carousel.RemoveBeatmapSet(testSingle));
         }
 
         [Test]
-        public void TestCarouselRootIsRandom()
+        public void TestCarouselRemembersSelection()
         {
             List<BeatmapSetInfo> manySets = new List<BeatmapSetInfo>();
 
@@ -429,12 +462,74 @@ namespace osu.Game.Tests.Visual.SongSelect
             loadBeatmaps(manySets);
 
             advanceSelection(direction: 1, diff: false);
-            checkNonmatchingFilter();
+
-            checkNonmatchingFilter();
+            for (int i = 0; i < 5; i++)
-            checkNonmatchingFilter();
+            {
-            checkNonmatchingFilter();
+                AddStep("Toggle non-matching filter", () =>
-            checkNonmatchingFilter();
+                {
-            AddAssert("Selection was random", () => eagerSelectedIDs.Count > 1);
+                    carousel.Filter(new FilterCriteria { SearchText = Guid.NewGuid().ToString() }, false);
+                });
+
+                AddStep("Restore no filter", () =>
+                {
+                    carousel.Filter(new FilterCriteria(), false);
+                    eagerSelectedIDs.Add(carousel.SelectedBeatmapSet.ID);
+                });
+            }
+
+            // always returns to same selection as long as it's available.
+            AddAssert("Selection was remembered", () => eagerSelectedIDs.Count == 1);
+        }
+
+        [Test]
+        public void TestRandomFallbackOnNonMatchingPrevious()
+        {
+            List<BeatmapSetInfo> manySets = new List<BeatmapSetInfo>();
+
+            AddStep("populate maps", () =>
+            {
+                for (int i = 0; i < 10; i++)
+                {
+                    var set = createTestBeatmapSet(i);
+
+                    foreach (var b in set.Beatmaps)
+                    {
+                        // all taiko except for first
+                        int ruleset = i > 0 ? 1 : 0;
+
+                        b.Ruleset = rulesets.GetRuleset(ruleset);
+                        b.RulesetID = ruleset;
+                    }
+
+                    manySets.Add(set);
+                }
+            });
+
+            loadBeatmaps(manySets);
+
+            for (int i = 0; i < 10; i++)
+            {
+                AddStep("Reset filter", () => carousel.Filter(new FilterCriteria(), false));
+
+                AddStep("select first beatmap", () => carousel.SelectBeatmap(manySets.First().Beatmaps.First()));
+
+                AddStep("Toggle non-matching filter", () =>
+                {
+                    carousel.Filter(new FilterCriteria { SearchText = Guid.NewGuid().ToString() }, false);
+                });
+
+                AddAssert("selection lost", () => carousel.SelectedBeatmap == null);
+
+                AddStep("Restore different ruleset filter", () =>
+                {
+                    carousel.Filter(new FilterCriteria { Ruleset = rulesets.GetRuleset(1) }, false);
+                    eagerSelectedIDs.Add(carousel.SelectedBeatmapSet.ID);
+                });
+
+                AddAssert("selection changed", () => carousel.SelectedBeatmap != manySets.First().Beatmaps.First());
+            }
+
+            AddAssert("Selection was random", () => eagerSelectedIDs.Count > 2);
         }
 
         [Test]
@@ -484,7 +579,7 @@ namespace osu.Game.Tests.Visual.SongSelect
             checkVisibleItemCount(true, 15);
         }
 
-        private void loadBeatmaps(List<BeatmapSetInfo> beatmapSets = null)
+        private void loadBeatmaps(List<BeatmapSetInfo> beatmapSets = null, Func<FilterCriteria> initialCriteria = null)
         {
             createCarousel();
 
@@ -499,7 +594,7 @@ namespace osu.Game.Tests.Visual.SongSelect
             bool changed = false;
             AddStep($"Load {(beatmapSets.Count > 0 ? beatmapSets.Count.ToString() : "some")} beatmaps", () =>
             {
-                carousel.Filter(new FilterCriteria());
+                carousel.Filter(initialCriteria?.Invoke() ?? new FilterCriteria());
                 carousel.BeatmapSetsChanged = () => changed = true;
                 carousel.BeatmapSets = beatmapSets;
             });
@@ -593,16 +688,6 @@ namespace osu.Game.Tests.Visual.SongSelect
             AddAssert("Selection is visible", selectedBeatmapVisible);
         }
 
-        private void checkNonmatchingFilter()
-        {
-            AddStep("Toggle non-matching filter", () =>
-            {
-                carousel.Filter(new FilterCriteria { SearchText = "Dingo" }, false);
-                carousel.Filter(new FilterCriteria(), false);
-                eagerSelectedIDs.Add(carousel.SelectedBeatmapSet.ID);
-            });
-        }
-
         private BeatmapSetInfo createTestBeatmapSet(int id)
         {
             return new BeatmapSetInfo

osu.Game.Tests/Visual/UserInterface/TestSceneCommentEditor.cs

@@ -15,7 +15,7 @@ using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.UserInterface
 {
-    public class TestSceneCommentEditor : ManualInputManagerTestScene
+    public class TestSceneCommentEditor : OsuManualInputManagerTestScene
     {
         public override IReadOnlyList<Type> RequiredTypes => new[]
         {

osu.Game.Tests/Visual/UserInterface/TestSceneCursors.cs

@@ -17,7 +17,7 @@ using osuTK.Graphics;
 namespace osu.Game.Tests.Visual.UserInterface
 {
     [TestFixture]
-    public class TestSceneCursors : ManualInputManagerTestScene
+    public class TestSceneCursors : OsuManualInputManagerTestScene
     {
         private readonly MenuCursorContainer menuCursorContainer;
         private readonly CustomCursorBox[] cursorBoxes = new CustomCursorBox[6];

osu.Game.Tests/Visual/UserInterface/TestSceneDeleteLocalScore.cs

@@ -27,7 +27,7 @@ using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.UserInterface
 {
-    public class TestSceneDeleteLocalScore : ManualInputManagerTestScene
+    public class TestSceneDeleteLocalScore : OsuManualInputManagerTestScene
     {
         public override IReadOnlyList<Type> RequiredTypes => new[]
         {

osu.Game.Tests/Visual/UserInterface/TestSceneOsuHoverContainer.cs

@@ -12,7 +12,7 @@ using osuTK.Graphics;
 namespace osu.Game.Tests.Visual.UserInterface
 {
     [TestFixture]
-    public class TestSceneOsuHoverContainer : ManualInputManagerTestScene
+    public class TestSceneOsuHoverContainer : OsuManualInputManagerTestScene
     {
         private OsuHoverTestContainer hoverContainer;
         private Box colourContainer;

osu.Game.Tests/Visual/UserInterface/TestSceneStatefulMenuItem.cs

@@ -12,7 +12,7 @@ using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.UserInterface
 {
-    public class TestSceneStatefulMenuItem : ManualInputManagerTestScene
+    public class TestSceneStatefulMenuItem : OsuManualInputManagerTestScene
     {
         public override IReadOnlyList<Type> RequiredTypes => new[]
         {

osu.Game.Tests/Visual/UserInterface/TestSceneSwitchButton.cs

@@ -9,7 +9,7 @@ using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.UserInterface
 {
-    public class TestSceneSwitchButton : ManualInputManagerTestScene
+    public class TestSceneSwitchButton : OsuManualInputManagerTestScene
     {
         private SwitchButton switchButton;
 

osu.Game.Tournament.Tests/LadderTestScene.cs

@@ -1,16 +1,147 @@
 // 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.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Utils;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets;
 using osu.Game.Tournament.Models;
+using osu.Game.Users;
 
 namespace osu.Game.Tournament.Tests
 {
     [TestFixture]
     public abstract class LadderTestScene : TournamentTestScene
     {
+        [Cached]
+        protected LadderInfo Ladder { get; private set; } = new LadderInfo();
+
         [Resolved]
-        protected LadderInfo Ladder { get; private set; }
+        private RulesetStore rulesetStore { get; set; }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            if (Ladder.Ruleset.Value == null)
+                Ladder.Ruleset.Value = rulesetStore.AvailableRulesets.First();
+
+            Ruleset.BindTo(Ladder.Ruleset);
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            TournamentMatch match = CreateSampleMatch();
+
+            Ladder.Rounds.Add(match.Round.Value);
+            Ladder.Matches.Add(match);
+            Ladder.Teams.Add(match.Team1.Value);
+            Ladder.Teams.Add(match.Team2.Value);
+
+            Ladder.CurrentMatch.Value = match;
+        }
+
+        public static TournamentMatch CreateSampleMatch() => new TournamentMatch
+        {
+            Team1 =
+            {
+                Value = new TournamentTeam
+                {
+                    FlagName = { Value = "JP" },
+                    FullName = { Value = "Japan" },
+                    LastYearPlacing = { Value = 10 },
+                    Seed = { Value = "Low" },
+                    SeedingResults =
+                    {
+                        new SeedingResult
+                        {
+                            Mod = { Value = "NM" },
+                            Seed = { Value = 10 },
+                            Beatmaps =
+                            {
+                                new SeedingBeatmap
+                                {
+                                    BeatmapInfo = CreateSampleBeatmapInfo(),
+                                    Score = 12345672,
+                                    Seed = { Value = 24 },
+                                },
+                                new SeedingBeatmap
+                                {
+                                    BeatmapInfo = CreateSampleBeatmapInfo(),
+                                    Score = 1234567,
+                                    Seed = { Value = 12 },
+                                },
+                                new SeedingBeatmap
+                                {
+                                    BeatmapInfo = CreateSampleBeatmapInfo(),
+                                    Score = 1234567,
+                                    Seed = { Value = 16 },
+                                }
+                            }
+                        },
+                        new SeedingResult
+                        {
+                            Mod = { Value = "DT" },
+                            Seed = { Value = 5 },
+                            Beatmaps =
+                            {
+                                new SeedingBeatmap
+                                {
+                                    BeatmapInfo = CreateSampleBeatmapInfo(),
+                                    Score = 234567,
+                                    Seed = { Value = 3 },
+                                },
+                                new SeedingBeatmap
+                                {
+                                    BeatmapInfo = CreateSampleBeatmapInfo(),
+                                    Score = 234567,
+                                    Seed = { Value = 6 },
+                                },
+                                new SeedingBeatmap
+                                {
+                                    BeatmapInfo = CreateSampleBeatmapInfo(),
+                                    Score = 234567,
+                                    Seed = { Value = 12 },
+                                }
+                            }
+                        }
+                    },
+                    Players =
+                    {
+                        new User { Username = "Hello", Statistics = new UserStatistics { Ranks = new UserStatistics.UserRanks { Global = 12 } } },
+                        new User { Username = "Hello", Statistics = new UserStatistics { Ranks = new UserStatistics.UserRanks { Global = 16 } } },
+                        new User { Username = "Hello", Statistics = new UserStatistics { Ranks = new UserStatistics.UserRanks { Global = 20 } } },
+                        new User { Username = "Hello", Statistics = new UserStatistics { Ranks = new UserStatistics.UserRanks { Global = 24 } } },
+                        new User { Username = "Hello", Statistics = new UserStatistics { Ranks = new UserStatistics.UserRanks { Global = 30 } } },
+                    }
+                }
+            },
+            Team2 =
+            {
+                Value = new TournamentTeam
+                {
+                    FlagName = { Value = "US" },
+                    FullName = { Value = "United States" },
+                    Players =
+                    {
+                        new User { Username = "Hello" },
+                        new User { Username = "Hello" },
+                        new User { Username = "Hello" },
+                        new User { Username = "Hello" },
+                        new User { Username = "Hello" },
+                    }
+                }
+            },
+            Round =
+            {
+                Value = new TournamentRound { Name = { Value = "Quarterfinals" } }
+            }
+        };
+
+        public static BeatmapInfo CreateSampleBeatmapInfo() =>
+            new BeatmapInfo { Metadata = new BeatmapMetadata { Title = "Test Title", Artist = "Test Artist", ID = RNG.Next(0, 1000000) } };
     }
 }

osu.Game.Tournament.Tests/Screens/TestSceneMapPoolScreen.cs

@@ -1,24 +1,140 @@
 // 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.Linq;
-using System.Collections.Generic;
+using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Testing;
+using osu.Game.Tournament.Components;
+using osu.Game.Tournament.Models;
 using osu.Game.Tournament.Screens.MapPool;
 
 namespace osu.Game.Tournament.Tests.Screens
 {
     public class TestSceneMapPoolScreen : LadderTestScene
     {
-        public override IReadOnlyList<Type> RequiredTypes => new[]
+        private MapPoolScreen screen;
-        {
-            typeof(MapPoolScreen)
-        };
 
         [BackgroundDependencyLoader]
         private void load()
         {
-            Add(new MapPoolScreen { Width = 0.7f });
+            Add(screen = new MapPoolScreen { Width = 0.7f });
+        }
+
+        [Test]
+        public void TestFewMaps()
+        {
+            AddStep("load few maps", () =>
+            {
+                Ladder.CurrentMatch.Value.Round.Value.Beatmaps.Clear();
+
+                for (int i = 0; i < 8; i++)
+                    addBeatmap();
+            });
+
+            AddStep("reset match", () =>
+            {
+                Ladder.CurrentMatch.Value = new TournamentMatch();
+                Ladder.CurrentMatch.Value = Ladder.Matches.First();
+            });
+
+            assertTwoWide();
+        }
+
+        [Test]
+        public void TestJustEnoughMaps()
+        {
+            AddStep("load just enough maps", () =>
+            {
+                Ladder.CurrentMatch.Value.Round.Value.Beatmaps.Clear();
+
+                for (int i = 0; i < 18; i++)
+                    addBeatmap();
+            });
+
+            AddStep("reset match", () =>
+            {
+                Ladder.CurrentMatch.Value = new TournamentMatch();
+                Ladder.CurrentMatch.Value = Ladder.Matches.First();
+            });
+
+            assertTwoWide();
+        }
+
+        [Test]
+        public void TestManyMaps()
+        {
+            AddStep("load many maps", () =>
+            {
+                Ladder.CurrentMatch.Value.Round.Value.Beatmaps.Clear();
+
+                for (int i = 0; i < 19; i++)
+                    addBeatmap();
+            });
+
+            AddStep("reset match", () =>
+            {
+                Ladder.CurrentMatch.Value = new TournamentMatch();
+                Ladder.CurrentMatch.Value = Ladder.Matches.First();
+            });
+
+            assertThreeWide();
+        }
+
+        [Test]
+        public void TestJustEnoughMods()
+        {
+            AddStep("load many maps", () =>
+            {
+                Ladder.CurrentMatch.Value.Round.Value.Beatmaps.Clear();
+
+                for (int i = 0; i < 11; i++)
+                    addBeatmap(i > 4 ? $"M{i}" : "NM");
+            });
+
+            AddStep("reset match", () =>
+            {
+                Ladder.CurrentMatch.Value = new TournamentMatch();
+                Ladder.CurrentMatch.Value = Ladder.Matches.First();
+            });
+
+            assertTwoWide();
+        }
+
+        private void assertTwoWide() =>
+            AddAssert("ensure layout width is 2", () => screen.ChildrenOfType<FillFlowContainer<FillFlowContainer<TournamentBeatmapPanel>>>().First().Padding.Left > 0);
+
+        private void assertThreeWide() =>
+            AddAssert("ensure layout width is 3", () => screen.ChildrenOfType<FillFlowContainer<FillFlowContainer<TournamentBeatmapPanel>>>().First().Padding.Left == 0);
+
+        [Test]
+        public void TestManyMods()
+        {
+            AddStep("load many maps", () =>
+            {
+                Ladder.CurrentMatch.Value.Round.Value.Beatmaps.Clear();
+
+                for (int i = 0; i < 12; i++)
+                    addBeatmap(i > 4 ? $"M{i}" : "NM");
+            });
+
+            AddStep("reset match", () =>
+            {
+                Ladder.CurrentMatch.Value = new TournamentMatch();
+                Ladder.CurrentMatch.Value = Ladder.Matches.First();
+            });
+
+            assertThreeWide();
+        }
+
+        private void addBeatmap(string mods = "nm")
+        {
+            Ladder.CurrentMatch.Value.Round.Value.Beatmaps.Add(new RoundBeatmap
+            {
+                BeatmapInfo = CreateSampleBeatmapInfo(),
+                Mods = mods
+            });
         }
     }
 }

osu.Game.Tournament.Tests/Screens/TestSceneSeedingEditorScreen.cs

@@ -14,7 +14,7 @@ namespace osu.Game.Tournament.Tests.Screens
 
         public TestSceneSeedingEditorScreen()
         {
-            var match = TestSceneSeedingScreen.CreateSampleSeededMatch();
+            var match = CreateSampleMatch();
 
             Add(new SeedingEditorScreen(match.Team1.Value)
             {

osu.Game.Tournament.Tests/Screens/TestSceneSeedingScreen.cs

@@ -3,10 +3,8 @@
 
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
-using osu.Game.Beatmaps;
 using osu.Game.Tournament.Models;
 using osu.Game.Tournament.Screens.TeamIntro;
-using osu.Game.Users;
 
 namespace osu.Game.Tournament.Tests.Screens
 {
@@ -18,110 +16,11 @@ namespace osu.Game.Tournament.Tests.Screens
         [BackgroundDependencyLoader]
         private void load()
         {
-            ladder.CurrentMatch.Value = CreateSampleSeededMatch();
-
             Add(new SeedingScreen
             {
                 FillMode = FillMode.Fit,
                 FillAspectRatio = 16 / 9f
             });
         }
-
-        public static TournamentMatch CreateSampleSeededMatch() => new TournamentMatch
-        {
-            Team1 =
-            {
-                Value = new TournamentTeam
-                {
-                    FlagName = { Value = "JP" },
-                    FullName = { Value = "Japan" },
-                    LastYearPlacing = { Value = 10 },
-                    Seed = { Value = "Low" },
-                    SeedingResults =
-                    {
-                        new SeedingResult
-                        {
-                            Mod = { Value = "NM" },
-                            Seed = { Value = 10 },
-                            Beatmaps =
-                            {
-                                new SeedingBeatmap
-                                {
-                                    BeatmapInfo = new BeatmapInfo { Metadata = new BeatmapMetadata { Title = "Test Title", Artist = "Test Artist" } },
-                                    Score = 12345672,
-                                    Seed = { Value = 24 },
-                                },
-                                new SeedingBeatmap
-                                {
-                                    BeatmapInfo = new BeatmapInfo { Metadata = new BeatmapMetadata { Title = "Test Title", Artist = "Test Artist" } },
-                                    Score = 1234567,
-                                    Seed = { Value = 12 },
-                                },
-                                new SeedingBeatmap
-                                {
-                                    BeatmapInfo = new BeatmapInfo { Metadata = new BeatmapMetadata { Title = "Test Title", Artist = "Test Artist" } },
-                                    Score = 1234567,
-                                    Seed = { Value = 16 },
-                                }
-                            }
-                        },
-                        new SeedingResult
-                        {
-                            Mod = { Value = "DT" },
-                            Seed = { Value = 5 },
-                            Beatmaps =
-                            {
-                                new SeedingBeatmap
-                                {
-                                    BeatmapInfo = new BeatmapInfo { Metadata = new BeatmapMetadata { Title = "Test Title", Artist = "Test Artist" } },
-                                    Score = 234567,
-                                    Seed = { Value = 3 },
-                                },
-                                new SeedingBeatmap
-                                {
-                                    BeatmapInfo = new BeatmapInfo { Metadata = new BeatmapMetadata { Title = "Test Title", Artist = "Test Artist" } },
-                                    Score = 234567,
-                                    Seed = { Value = 6 },
-                                },
-                                new SeedingBeatmap
-                                {
-                                    BeatmapInfo = new BeatmapInfo { Metadata = new BeatmapMetadata { Title = "Test Title", Artist = "Test Artist" } },
-                                    Score = 234567,
-                                    Seed = { Value = 12 },
-                                }
-                            }
-                        }
-                    },
-                    Players =
-                    {
-                        new User { Username = "Hello", Statistics = new UserStatistics { Ranks = new UserStatistics.UserRanks { Global = 12 } } },
-                        new User { Username = "Hello", Statistics = new UserStatistics { Ranks = new UserStatistics.UserRanks { Global = 16 } } },
-                        new User { Username = "Hello", Statistics = new UserStatistics { Ranks = new UserStatistics.UserRanks { Global = 20 } } },
-                        new User { Username = "Hello", Statistics = new UserStatistics { Ranks = new UserStatistics.UserRanks { Global = 24 } } },
-                        new User { Username = "Hello", Statistics = new UserStatistics { Ranks = new UserStatistics.UserRanks { Global = 30 } } },
-                    }
-                }
-            },
-            Team2 =
-            {
-                Value = new TournamentTeam
-                {
-                    FlagName = { Value = "US" },
-                    FullName = { Value = "United States" },
-                    Players =
-                    {
-                        new User { Username = "Hello" },
-                        new User { Username = "Hello" },
-                        new User { Username = "Hello" },
-                        new User { Username = "Hello" },
-                        new User { Username = "Hello" },
-                    }
-                }
-            },
-            Round =
-            {
-                Value = new TournamentRound { Name = { Value = "Quarterfinals" } }
-            }
-        };
     }
 }

osu.Game.Tournament/Components/TournamentMatchChatDisplay.cs

@@ -70,6 +70,17 @@ namespace osu.Game.Tournament.Components
 
         protected override ChatLine CreateMessage(Message message) => new MatchMessage(message);
 
+        protected override StandAloneDrawableChannel CreateDrawableChannel(Channel channel) => new MatchChannel(channel);
+
+        public class MatchChannel : StandAloneDrawableChannel
+        {
+            public MatchChannel(Channel channel)
+                : base(channel)
+            {
+                ScrollbarVisible = false;
+            }
+        }
+
         protected class MatchMessage : StandAloneMessage
         {
             public MatchMessage(Message message)

osu.Game.Tournament/Models/LadderInfo.cs

@@ -24,7 +24,13 @@ namespace osu.Game.Tournament.Models
         // only used for serialisation
         public List<TournamentProgression> Progressions = new List<TournamentProgression>();
 
-        [JsonIgnore]
+        [JsonIgnore] // updated manually in TournamentGameBase
         public Bindable<TournamentMatch> CurrentMatch = new Bindable<TournamentMatch>();
+
+        public Bindable<int> ChromaKeyWidth = new BindableInt(1024)
+        {
+            MinValue = 640,
+            MaxValue = 1366,
+        };
     }
 }

osu.Game.Tournament/Screens/Gameplay/GameplayScreen.cs

@@ -9,6 +9,7 @@ using osu.Framework.Graphics.Shapes;
 using osu.Framework.Platform;
 using osu.Framework.Threading;
 using osu.Game.Graphics.UserInterface;
+using osu.Game.Overlays.Settings;
 using osu.Game.Tournament.Components;
 using osu.Game.Tournament.IPC;
 using osu.Game.Tournament.Models;
@@ -35,6 +36,8 @@ namespace osu.Game.Tournament.Screens.Gameplay
         [Resolved]
         private TournamentMatchChatDisplay chat { get; set; }
 
+        private Box chroma;
+
         [BackgroundDependencyLoader]
         private void load(LadderInfo ladder, MatchIPCInfo ipc, Storage storage)
         {
@@ -60,11 +63,10 @@ namespace osu.Game.Tournament.Screens.Gameplay
                     Origin = Anchor.TopCentre,
                     Children = new Drawable[]
                     {
-                        new Box
+                        chroma = new Box
                         {
                             // chroma key area for stable gameplay
                             Name = "chroma",
-                            RelativeSizeAxes = Axes.X,
                             Anchor = Anchor.TopCentre,
                             Origin = Anchor.TopCentre,
                             Height = 512,
@@ -93,6 +95,12 @@ namespace osu.Game.Tournament.Screens.Gameplay
                             RelativeSizeAxes = Axes.X,
                             Text = "Toggle chat",
                             Action = () => { State.Value = State.Value == TourneyState.Idle ? TourneyState.Playing : TourneyState.Idle; }
+                        },
+                        new SettingsSlider<int>
+                        {
+                            LabelText = "Chroma Width",
+                            Bindable = LadderInfo.ChromaKeyWidth,
+                            KeyboardStep = 1,
                         }
                     }
                 }
@@ -101,6 +109,8 @@ namespace osu.Game.Tournament.Screens.Gameplay
             State.BindTo(ipc.State);
             State.BindValueChanged(stateChanged, true);
 
+            ladder.ChromaKeyWidth.BindValueChanged(width => chroma.Width = width.NewValue, true);
+
             currentMatch.BindValueChanged(m =>
             {
                 warmup.Value = m.NewValue.Team1Score.Value + m.NewValue.Team2Score.Value == 0;

osu.Game.Tournament/Screens/MapPool/MapPoolScreen.cs

@@ -50,11 +50,11 @@ namespace osu.Game.Tournament.Screens.MapPool
                 new MatchHeader(),
                 mapFlows = new FillFlowContainer<FillFlowContainer<TournamentBeatmapPanel>>
                 {
-                    Y = 140,
+                    Y = 160,
                     Spacing = new Vector2(10, 10),
-                    Padding = new MarginPadding(25),
                     Direction = FillDirection.Vertical,
-                    RelativeSizeAxes = Axes.Both,
+                    RelativeSizeAxes = Axes.X,
+                    AutoSizeAxes = Axes.Y,
                 },
                 new ControlPanel
                 {
@@ -95,6 +95,7 @@ namespace osu.Game.Tournament.Screens.MapPool
                             Text = "Reset",
                             Action = reset
                         },
+                        new ControlPanel.Spacer(),
                     }
                 }
             };
@@ -211,11 +212,15 @@ namespace osu.Game.Tournament.Screens.MapPool
         {
             mapFlows.Clear();
 
+            int totalRows = 0;
+
             if (match.NewValue.Round.Value != null)
             {
                 FillFlowContainer<TournamentBeatmapPanel> currentFlow = null;
                 string currentMod = null;
 
+                int flowCount = 0;
+
                 foreach (var b in match.NewValue.Round.Value.Beatmaps)
                 {
                     if (currentFlow == null || currentMod != b.Mods)
@@ -229,6 +234,15 @@ namespace osu.Game.Tournament.Screens.MapPool
                         });
 
                         currentMod = b.Mods;
+
+                        totalRows++;
+                        flowCount = 0;
+                    }
+
+                    if (++flowCount > 2)
+                    {
+                        totalRows++;
+                        flowCount = 1;
                     }
 
                     currentFlow.Add(new TournamentBeatmapPanel(b.BeatmapInfo, b.Mods)
@@ -239,6 +253,12 @@ namespace osu.Game.Tournament.Screens.MapPool
                     });
                 }
             }
+
+            mapFlows.Padding = new MarginPadding(5)
+            {
+                // remove horizontal padding to increase flow width to 3 panels
+                Horizontal = totalRows > 9 ? 0 : 100
+            };
         }
     }
 }

osu.Game.Tournament/Screens/SetupScreen.cs

@@ -116,7 +116,7 @@ namespace osu.Game.Tournament.Screens
                     {
                         windowSize.Value = new Size((int)(1920 / TournamentSceneManager.STREAM_AREA_WIDTH * TournamentSceneManager.REQUIRED_WIDTH), 1080);
                     }
-                }
+                },
             };
         }
 

osu.Game/Online/Chat/StandAloneChatDisplay.cs

@@ -26,7 +26,7 @@ namespace osu.Game.Online.Chat
 
         protected ChannelManager ChannelManager;
 
-        private DrawableChannel drawableChannel;
+        private StandAloneDrawableChannel drawableChannel;
 
         private readonly bool postingTextbox;
 
@@ -77,6 +77,9 @@ namespace osu.Game.Online.Chat
                 ChannelManager = manager;
         }
 
+        protected virtual StandAloneDrawableChannel CreateDrawableChannel(Channel channel) =>
+            new StandAloneDrawableChannel(channel);
+
         private void postMessage(TextBox sender, bool newtext)
         {
             var text = textbox.Text.Trim();
@@ -100,14 +103,14 @@ namespace osu.Game.Online.Chat
 
             if (e.NewValue == null) return;
 
-            AddInternal(drawableChannel = new StandAloneDrawableChannel(e.NewValue)
+            drawableChannel = CreateDrawableChannel(e.NewValue);
-            {
+            drawableChannel.CreateChatLineAction = CreateMessage;
-                CreateChatLineAction = CreateMessage,
+            drawableChannel.Padding = new MarginPadding { Bottom = postingTextbox ? textbox_height : 0 };
-                Padding = new MarginPadding { Bottom = postingTextbox ? textbox_height : 0 }
+
-            });
+            AddInternal(drawableChannel);
         }
 
-        protected class StandAloneDrawableChannel : DrawableChannel
+        public class StandAloneDrawableChannel : DrawableChannel
         {
             public Func<Message, ChatLine> CreateChatLineAction;
 

osu.Game/OsuGameBase.cs

@@ -47,6 +47,8 @@ namespace osu.Game
     {
         public const string CLIENT_STREAM_NAME = "lazer";
 
+        public const int SAMPLE_CONCURRENCY = 6;
+
         protected OsuConfigManager LocalConfig;
 
         protected BeatmapManager BeatmapManager;
@@ -153,6 +155,8 @@ namespace osu.Game
             AddFont(Resources, @"Fonts/Venera-Bold");
             AddFont(Resources, @"Fonts/Venera-Black");
 
+            Audio.Samples.PlaybackConcurrency = SAMPLE_CONCURRENCY;
+
             runMigrations();
 
             dependencies.Cache(SkinManager = new SkinManager(Storage, contextFactory, Host, Audio, new NamespacedResourceStore<byte[]>(Resources, "Skins/Legacy")));

osu.Game/Overlays/Chat/DrawableChannel.cs

@@ -26,6 +26,20 @@ namespace osu.Game.Overlays.Chat
         protected FillFlowContainer ChatLineFlow;
         private OsuScrollContainer scroll;
 
+        private bool scrollbarVisible = true;
+
+        public bool ScrollbarVisible
+        {
+            set
+            {
+                if (scrollbarVisible == value) return;
+
+                scrollbarVisible = value;
+                if (scroll != null)
+                    scroll.ScrollbarVisible = value;
+            }
+        }
+
         [Resolved]
         private OsuColour colours { get; set; }
 
@@ -44,6 +58,7 @@ namespace osu.Game.Overlays.Chat
                 Masking = true,
                 Child = scroll = new OsuScrollContainer
                 {
+                    ScrollbarVisible = scrollbarVisible,
                     RelativeSizeAxes = Axes.Both,
                     // Some chat lines have effects that slightly protrude to the bottom,
                     // which we do not want to mask away, hence the padding.

osu.Game/Overlays/Settings/SettingsCheckbox.cs

@@ -8,16 +8,14 @@ namespace osu.Game.Overlays.Settings
 {
     public class SettingsCheckbox : SettingsItem<bool>
     {
-        private OsuCheckbox checkbox;
-
         private string labelText;
 
-        protected override Drawable CreateControl() => checkbox = new OsuCheckbox();
+        protected override Drawable CreateControl() => new OsuCheckbox();
 
         public override string LabelText
         {
             get => labelText;
-            set => checkbox.LabelText = labelText = value;
+            set => ((OsuCheckbox)Control).LabelText = labelText = value;
         }
     }
 }

osu.Game/Overlays/Settings/SettingsItem.cs

@@ -33,22 +33,24 @@ namespace osu.Game.Overlays.Settings
 
         protected readonly FillFlowContainer FlowContent;
 
-        private SpriteText text;
+        private SpriteText labelText;
 
         public bool ShowsDefaultIndicator = true;
 
         public virtual string LabelText
         {
-            get => text?.Text ?? string.Empty;
+            get => labelText?.Text ?? string.Empty;
             set
             {
-                if (text == null)
+                if (labelText == null)
                 {
                     // construct lazily for cases where the label is not needed (may be provided by the Control).
-                    FlowContent.Insert(-1, text = new OsuSpriteText());
+                    FlowContent.Insert(-1, labelText = new OsuSpriteText());
+
+                    updateDisabled();
                 }
 
-                text.Text = value;
+                labelText.Text = value;
             }
         }
 
@@ -96,13 +98,19 @@ namespace osu.Game.Overlays.Settings
             if (controlWithCurrent != null)
             {
                 controlWithCurrent.Current.ValueChanged += _ => SettingChanged?.Invoke();
-                controlWithCurrent.Current.DisabledChanged += disabled => { Colour = disabled ? Color4.Gray : Color4.White; };
+                controlWithCurrent.Current.DisabledChanged += _ => updateDisabled();
 
                 if (ShowsDefaultIndicator)
                     restoreDefaultButton.Bindable = controlWithCurrent.Current;
             }
         }
 
+        private void updateDisabled()
+        {
+            if (labelText != null)
+                labelText.Alpha = controlWithCurrent.Current.Disabled ? 0.3f : 1;
+        }
+
         private class RestoreDefaultValueButton : Container, IHasTooltip
         {
             private Bindable<T> bindable;

osu.Game/Rulesets/UI/DrawableRuleset.cs

@@ -158,6 +158,7 @@ namespace osu.Game.Rulesets.UI
                 dependencies.Cache(textureStore);
 
                 localSampleStore = dependencies.Get<AudioManager>().GetSampleStore(new NamespacedResourceStore<byte[]>(resources, "Samples"));
+                localSampleStore.PlaybackConcurrency = OsuGameBase.SAMPLE_CONCURRENCY;
                 dependencies.CacheAs<ISampleStore>(new FallbackSampleStore(localSampleStore, dependencies.Get<ISampleStore>()));
             }
 

osu.Game/Screens/Select/BeatmapCarousel.cs

@@ -333,8 +333,7 @@ namespace osu.Game.Screens.Select
             else
                 set = visibleSets.ElementAt(RNG.Next(visibleSets.Count));
 
-            var visibleBeatmaps = set.Beatmaps.Where(s => !s.Filtered.Value).ToList();
+            select(set);
-            select(visibleBeatmaps[RNG.Next(visibleBeatmaps.Count)]);
             return true;
         }
 
@@ -751,13 +750,17 @@ namespace osu.Game.Screens.Select
 
             public CarouselRoot(BeatmapCarousel carousel)
             {
+                // root should always remain selected. if not, PerformSelection will not be called.
+                State.Value = CarouselItemState.Selected;
+                State.ValueChanged += state => State.Value = CarouselItemState.Selected;
+
                 this.carousel = carousel;
             }
 
             protected override void PerformSelection()
             {
-                if (LastSelected == null)
+                if (LastSelected == null || LastSelected.Filtered.Value)
-                    carousel.SelectNextRandom();
+                    carousel?.SelectNextRandom();
                 else
                     base.PerformSelection();
             }

osu.Game/Screens/Select/Carousel/CarouselGroupEagerSelect.cs

@@ -104,6 +104,7 @@ namespace osu.Game.Screens.Select.Carousel
 
         private void updateSelected(CarouselItem newSelection)
         {
+            if (newSelection != null)
                 LastSelected = newSelection;
             updateSelectedIndex();
         }

osu.Game/Screens/Select/SongSelect.cs

@@ -150,6 +150,7 @@ namespace osu.Game.Screens.Select
                                         },
                                         Child = Carousel = new BeatmapCarousel
                                         {
+                                            AllowSelection = false, // delay any selection until our bindables are ready to make a good choice.
                                             Anchor = Anchor.CentreRight,
                                             Origin = Anchor.CentreRight,
                                             RelativeSizeAxes = Axes.Both,
@@ -655,6 +656,8 @@ namespace osu.Game.Screens.Select
         {
             bindBindables();
 
+            Carousel.AllowSelection = true;
+
             // If a selection was already obtained, do not attempt to update the selected beatmap.
             if (Carousel.SelectedBeatmapSet != null)
                 return;

osu.Game/Skinning/LegacySkin.cs

@@ -52,7 +52,11 @@ namespace osu.Game.Skinning
 
             if (storage != null)
             {
-                Samples = audioManager?.GetSampleStore(storage);
+                var samples = audioManager?.GetSampleStore(storage);
+                if (samples != null)
+                    samples.PlaybackConcurrency = OsuGameBase.SAMPLE_CONCURRENCY;
+
+                Samples = samples;
                 Textures = new TextureStore(new TextureLoaderStore(storage));
 
                 (storage as ResourceStore<byte[]>)?.AddExtension("ogg");

osu.Game/Tests/Visual/OsuManualInputManagerTestScene.cs

@@ -14,7 +14,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Tests.Visual
 {
-    public abstract class ManualInputManagerTestScene : OsuTestScene
+    public abstract class OsuManualInputManagerTestScene : OsuTestScene
     {
         protected override Container<Drawable> Content => content;
         private readonly Container content;
@@ -24,7 +24,7 @@ namespace osu.Game.Tests.Visual
         private readonly TriangleButton buttonTest;
         private readonly TriangleButton buttonLocal;
 
-        protected ManualInputManagerTestScene()
+        protected OsuManualInputManagerTestScene()
         {
             base.Content.AddRange(new Drawable[]
             {

osu.Game/Tests/Visual/ScreenTestScene.cs

@@ -11,7 +11,7 @@ namespace osu.Game.Tests.Visual
     /// <summary>
     /// A test case which can be used to test a screen (that relies on OnEntering being called to execute startup instructions).
     /// </summary>
-    public abstract class ScreenTestScene : ManualInputManagerTestScene
+    public abstract class ScreenTestScene : OsuManualInputManagerTestScene
     {
         protected readonly OsuScreenStack Stack;
 

osu.Game/Tests/Visual/SelectionBlueprintTestScene.cs

@@ -8,7 +8,7 @@ using osu.Game.Rulesets.Edit;
 
 namespace osu.Game.Tests.Visual
 {
-    public abstract class SelectionBlueprintTestScene : ManualInputManagerTestScene
+    public abstract class SelectionBlueprintTestScene : OsuManualInputManagerTestScene
     {
         protected override Container<Drawable> Content => content ?? base.Content;
         private readonly Container content;