Merge branch 'master' into path-type-menuitem

osu.Android.props

@@ -54,6 +54,6 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="ppy.osu.Game.Resources" Version="2019.1010.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2019.1205.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2019.1210.1" />
   </ItemGroup>
 </Project>

osu.Game.Rulesets.Catch/MathUtils/FastRandom.cs

@@ -12,14 +12,14 @@ namespace osu.Game.Rulesets.Catch.MathUtils
     {
         private const double int_to_real = 1.0 / (int.MaxValue + 1.0);
         private const uint int_mask = 0x7FFFFFFF;
-        private const uint y = 842502087;
+        private const uint y_initial = 842502087;
-        private const uint z = 3579807591;
+        private const uint z_initial = 3579807591;
-        private const uint w = 273326509;
+        private const uint w_initial = 273326509;
-        private uint _x, _y = y, _z = z, _w = w;
+        private uint x, y = y_initial, z = z_initial, w = w_initial;
 
         public FastRandom(int seed)
         {
-            _x = (uint)seed;
+            x = (uint)seed;
         }
 
         public FastRandom()
@@ -33,11 +33,11 @@ namespace osu.Game.Rulesets.Catch.MathUtils
         /// <returns>The random value.</returns>
         public uint NextUInt()
         {
-            uint t = _x ^ (_x << 11);
+            uint t = x ^ (x << 11);
-            _x = _y;
+            x = y;
-            _y = _z;
+            y = z;
-            _z = _w;
+            z = w;
-            return _w = _w ^ (_w >> 19) ^ t ^ (t >> 8);
+            return w = w ^ (w >> 19) ^ t ^ (t >> 8);
         }
 
         /// <summary>

osu.Game.Rulesets.Catch/UI/CatcherSprite.cs

@@ -22,7 +22,7 @@ namespace osu.Game.Rulesets.Catch.UI
         [BackgroundDependencyLoader]
         private void load()
         {
-            InternalChild = new SkinnableSprite("Gameplay/catch/fruit-catcher-idle")
+            InternalChild = new SkinnableSprite("Gameplay/catch/fruit-catcher-idle", confineMode: ConfineMode.ScaleDownToFit)
             {
                 RelativeSizeAxes = Axes.Both,
                 Anchor = Anchor.TopCentre,

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs

@@ -128,8 +128,8 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
                 slider.Path.ControlPoints.Remove(c);
             }
 
-            // If there are 0 remaining control points, treat the slider as being deleted
+            // If there are 0 or 1 remaining control points, the slider is in a degenerate (single point) form and should be deleted
-            if (slider.Path.ControlPoints.Count == 0)
+            if (slider.Path.ControlPoints.Count <= 1)
             {
                 placementHandler?.Delete(slider);
                 return true;
@@ -163,7 +163,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
 
                 return new MenuItem[]
                 {
-                    new OsuMenuItem($"Delete {"control point".ToQuantity(selectedPoints)}", MenuItemType.Destructive, () => deleteSelected()),
+                    new OsuMenuItem($"Delete {"control point".ToQuantity(selectedPoints, selectedPoints > 1 ? ShowQuantityAs.Numeric : ShowQuantityAs.None)}", MenuItemType.Destructive, () => deleteSelected()),
                     new OsuMenuItem("Type")
                     {
                         Items = new[]

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderPlacementBlueprint.cs

@@ -1,7 +1,6 @@
 // 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.Collections.Generic;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Input;
@@ -191,15 +190,5 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             Initial,
             Body,
         }
-
-        private class Segment
-        {
-            public readonly List<Vector2> ControlPoints = new List<Vector2>();
-
-            public Segment(Vector2 offset)
-            {
-                ControlPoints.Add(offset);
-            }
-        }
     }
 }

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs

@@ -104,7 +104,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             int insertionIndex = 0;
             float minDistance = float.MaxValue;
 
-            for (int i = 0; i < HitObject.Path.ControlPoints.Count - 2; i++)
+            for (int i = 0; i < HitObject.Path.ControlPoints.Count - 1; i++)
             {
                 float dist = new Line(HitObject.Path.ControlPoints[i].Position.Value, HitObject.Path.ControlPoints[i + 1].Position.Value).DistanceToPoint(position);
 

osu.Game.Rulesets.Osu/Skinning/LegacyCursor.cs

@@ -3,15 +3,14 @@
 
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
-using osu.Framework.Graphics.Containers;
 using osu.Game.Skinning;
+using osu.Game.Rulesets.Osu.UI.Cursor;
 using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Skinning
 {
-    public class LegacyCursor : CompositeDrawable
+    public class LegacyCursor : OsuCursorSprite
     {
-        private NonPlayfieldSprite cursor;
         private bool spin;
 
         public LegacyCursor()
@@ -27,7 +26,7 @@ namespace osu.Game.Rulesets.Osu.Skinning
         {
             spin = skin.GetConfig<OsuSkinConfiguration, bool>(OsuSkinConfiguration.CursorRotate)?.Value ?? true;
 
-            InternalChildren = new Drawable[]
+            InternalChildren = new[]
             {
                 new NonPlayfieldSprite
                 {
@@ -35,7 +34,7 @@ namespace osu.Game.Rulesets.Osu.Skinning
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,
                 },
-                cursor = new NonPlayfieldSprite
+                ExpandTarget = new NonPlayfieldSprite
                 {
                     Texture = skin.GetTexture("cursor"),
                     Anchor = Anchor.Centre,
@@ -47,7 +46,7 @@ namespace osu.Game.Rulesets.Osu.Skinning
         protected override void LoadComplete()
         {
             if (spin)
-                cursor.Spin(10000, RotationDirection.Clockwise);
+                ExpandTarget.Spin(10000, RotationDirection.Clockwise);
         }
     }
 }

osu.Game.Rulesets.Osu/UI/Cursor/OsuCursor.cs

@@ -20,7 +20,9 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
 
         private bool cursorExpand;
 
-        private Container expandTarget;
+        private SkinnableDrawable cursorSprite;
+
+        private Drawable expandTarget => (cursorSprite.Drawable as OsuCursorSprite)?.ExpandTarget ?? cursorSprite;
 
         public OsuCursor()
         {
@@ -37,12 +39,12 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
         [BackgroundDependencyLoader]
         private void load()
         {
-            InternalChild = expandTarget = new Container
+            InternalChild = new Container
             {
                 RelativeSizeAxes = Axes.Both,
                 Origin = Anchor.Centre,
                 Anchor = Anchor.Centre,
-                Child = new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.Cursor), _ => new DefaultCursor(), confineMode: ConfineMode.NoScaling)
+                Child = cursorSprite = new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.Cursor), _ => new DefaultCursor(), confineMode: ConfineMode.NoScaling)
                 {
                     Origin = Anchor.Centre,
                     Anchor = Anchor.Centre,
@@ -62,7 +64,7 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
 
         public void Contract() => expandTarget.ScaleTo(released_scale, 100, Easing.OutQuad);
 
-        private class DefaultCursor : CompositeDrawable
+        private class DefaultCursor : OsuCursorSprite
         {
             public DefaultCursor()
             {
@@ -71,10 +73,12 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
                 Anchor = Anchor.Centre;
                 Origin = Anchor.Centre;
 
-                InternalChildren = new Drawable[]
+                InternalChildren = new[]
                 {
-                    new CircularContainer
+                    ExpandTarget = new CircularContainer
                     {
+                        Anchor = Anchor.Centre,
+                        Origin = Anchor.Centre,
                         RelativeSizeAxes = Axes.Both,
                         Masking = true,
                         BorderThickness = size / 6,

osu.Game.Rulesets.Osu/UI/Cursor/OsuCursorSprite.cs

@@ -0,0 +1,17 @@
+// 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.Graphics;
+using osu.Framework.Graphics.Containers;
+
+namespace osu.Game.Rulesets.Osu.UI.Cursor
+{
+    public abstract class OsuCursorSprite : CompositeDrawable
+    {
+        /// <summary>
+        /// The an optional piece of the cursor to expand when in a clicked state.
+        /// If null, the whole cursor will be affected by expansion.
+        /// </summary>
+        public Drawable ExpandTarget { get; protected set; }
+    }
+}

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

@@ -57,8 +57,8 @@ namespace osu.Game.Tests.Visual.Gameplay
             beforeLoadAction?.Invoke();
             Beatmap.Value = CreateWorkingBeatmap(new OsuRuleset().RulesetInfo);
 
-            foreach (var mod in Mods.Value.OfType<IApplicableToClock>())
+            foreach (var mod in Mods.Value.OfType<IApplicableToTrack>())
-                mod.ApplyToClock(Beatmap.Value.Track);
+                mod.ApplyToTrack(Beatmap.Value.Track);
 
             InputManager.Child = container = new TestPlayerLoaderContainer(
                 loader = new TestPlayerLoader(() =>

osu.Game.Tests/Visual/Settings/TestSceneSettingsSource.cs

@@ -0,0 +1,65 @@
+// 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 NUnit.Framework;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Configuration;
+using osuTK;
+
+namespace osu.Game.Tests.Visual.Settings
+{
+    [TestFixture]
+    public class TestSceneSettingsSource : OsuTestScene
+    {
+        public TestSceneSettingsSource()
+        {
+            Children = new Drawable[]
+            {
+                new FillFlowContainer
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Direction = FillDirection.Vertical,
+                    Spacing = new Vector2(20),
+                    Width = 0.5f,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Padding = new MarginPadding(50),
+                    ChildrenEnumerable = new TestTargetClass().CreateSettingsControls()
+                },
+            };
+        }
+
+        private class TestTargetClass
+        {
+            [SettingSource("Sample bool", "Clicking this changes a setting")]
+            public BindableBool TickBindable { get; } = new BindableBool();
+
+            [SettingSource("Sample float", "Change something for a mod")]
+            public BindableFloat SliderBindable { get; } = new BindableFloat
+            {
+                MinValue = 0,
+                MaxValue = 10,
+                Default = 5,
+                Value = 7
+            };
+
+            [SettingSource("Sample enum", "Change something for a mod")]
+            public Bindable<TestEnum> EnumBindable { get; } = new Bindable<TestEnum>
+            {
+                Default = TestEnum.Value1,
+                Value = TestEnum.Value2
+            };
+
+            [SettingSource("Sample string", "Change something for a mod")]
+            public Bindable<string> StringBindable { get; } = new Bindable<string>();
+        }
+
+        private enum TestEnum
+        {
+            Value1,
+            Value2
+        }
+    }
+}

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

@@ -95,6 +95,42 @@ namespace osu.Game.Tests.Visual.SongSelect
             AddAssert("filter count is 1", () => songSelect.FilterCount == 1);
         }
 
+        [Test]
+        public void TestNoFilterOnSimpleResume()
+        {
+            addRulesetImportStep(0);
+            addRulesetImportStep(0);
+
+            createSongSelect();
+
+            AddStep("push child screen", () => Stack.Push(new TestSceneOsuScreenStack.TestScreen("test child")));
+            AddUntilStep("wait for not current", () => !songSelect.IsCurrentScreen());
+
+            AddStep("return", () => songSelect.MakeCurrent());
+            AddUntilStep("wait for current", () => songSelect.IsCurrentScreen());
+            AddAssert("filter count is 1", () => songSelect.FilterCount == 1);
+        }
+
+        [Test]
+        public void TestFilterOnResumeAfterChange()
+        {
+            addRulesetImportStep(0);
+            addRulesetImportStep(0);
+
+            AddStep("change convert setting", () => config.Set(OsuSetting.ShowConvertedBeatmaps, false));
+
+            createSongSelect();
+
+            AddStep("push child screen", () => Stack.Push(new TestSceneOsuScreenStack.TestScreen("test child")));
+            AddUntilStep("wait for not current", () => !songSelect.IsCurrentScreen());
+
+            AddStep("change convert setting", () => config.Set(OsuSetting.ShowConvertedBeatmaps, true));
+
+            AddStep("return", () => songSelect.MakeCurrent());
+            AddUntilStep("wait for current", () => songSelect.IsCurrentScreen());
+            AddAssert("filter count is 2", () => songSelect.FilterCount == 2);
+        }
+
         [Test]
         public void TestAudioResuming()
         {

osu.Game.Tests/Visual/TestSceneOsuScreenStack.cs

@@ -42,7 +42,7 @@ namespace osu.Game.Tests.Visual
             AddAssert("Parallax is off", () => stack.ParallaxAmount == 0);
         }
 
-        private class TestScreen : ScreenWithBeatmapBackground
+        public class TestScreen : ScreenWithBeatmapBackground
         {
             private readonly string screenText;
 

osu.Game.Tournament/Screens/Drawings/Components/ScrollingTeamContainer.cs

@@ -83,22 +83,16 @@ namespace osu.Game.Tournament.Screens.Drawings.Components
             };
         }
 
-        private ScrollState _scrollState;
+        private ScrollState scrollState;
 
-        private ScrollState scrollState
+        private void setScrollState(ScrollState newstate)
         {
-            get => _scrollState;
+            if (scrollState == newstate)
-
-            set
-            {
-                if (_scrollState == value)
                 return;
 
-                _scrollState = value;
-
             delayedStateChangeDelegate?.Cancel();
 
-                switch (value)
+            switch (scrollState = newstate)
             {
                 case ScrollState.Scrolling:
                     resetSelected();
@@ -113,7 +107,7 @@ namespace osu.Game.Tournament.Screens.Drawings.Components
                     speedTo(0f, 2000);
                     tracker.FadeIn(200);
 
-                        delayedStateChangeDelegate = Scheduler.AddDelayed(() => scrollState = ScrollState.Stopped, 2300);
+                    delayedStateChangeDelegate = Scheduler.AddDelayed(() => setScrollState(ScrollState.Stopped), 2300);
                     break;
 
                 case ScrollState.Stopped:
@@ -153,7 +147,7 @@ namespace osu.Game.Tournament.Screens.Drawings.Components
                     st.Selected = true;
                     OnSelected?.Invoke(st.Team);
 
-                        delayedStateChangeDelegate = Scheduler.AddDelayed(() => scrollState = ScrollState.Idle, 10000);
+                    delayedStateChangeDelegate = Scheduler.AddDelayed(() => setScrollState(ScrollState.Idle), 10000);
                     break;
 
                 case ScrollState.Idle:
@@ -166,7 +160,6 @@ namespace osu.Game.Tournament.Screens.Drawings.Components
                     break;
             }
         }
-        }
 
         public void AddTeam(TournamentTeam team)
         {
@@ -176,7 +169,7 @@ namespace osu.Game.Tournament.Screens.Drawings.Components
             availableTeams.Add(team);
 
             RemoveAll(c => c is ScrollingTeam);
-            scrollState = ScrollState.Idle;
+            setScrollState(ScrollState.Idle);
         }
 
         public void AddTeams(IEnumerable<TournamentTeam> teams)
@@ -192,7 +185,7 @@ namespace osu.Game.Tournament.Screens.Drawings.Components
         {
             availableTeams.Clear();
             RemoveAll(c => c is ScrollingTeam);
-            scrollState = ScrollState.Idle;
+            setScrollState(ScrollState.Idle);
         }
 
         public void RemoveTeam(TournamentTeam team)
@@ -217,7 +210,7 @@ namespace osu.Game.Tournament.Screens.Drawings.Components
             if (availableTeams.Count == 0)
                 return;
 
-            scrollState = ScrollState.Scrolling;
+            setScrollState(ScrollState.Scrolling);
         }
 
         public void StopScrolling()
@@ -232,13 +225,13 @@ namespace osu.Game.Tournament.Screens.Drawings.Components
                     return;
             }
 
-            scrollState = ScrollState.Stopping;
+            setScrollState(ScrollState.Stopping);
         }
 
         protected override void LoadComplete()
         {
             base.LoadComplete();
-            scrollState = ScrollState.Idle;
+            setScrollState(ScrollState.Idle);
         }
 
         protected override void UpdateAfterChildren()
@@ -305,7 +298,7 @@ namespace osu.Game.Tournament.Screens.Drawings.Components
         private void speedTo(float value, double duration = 0, Easing easing = Easing.None) =>
             this.TransformTo(nameof(speed), value, duration, easing);
 
-        private enum ScrollState
+        protected enum ScrollState
         {
             None,
             Idle,

osu.Game/Configuration/DatabasedConfigManager.cs

@@ -1,6 +1,7 @@
 // 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 System.Linq;
 using osu.Framework.Bindables;
@@ -9,8 +10,8 @@ using osu.Game.Rulesets;
 
 namespace osu.Game.Configuration
 {
-    public abstract class DatabasedConfigManager<T> : ConfigManager<T>
+    public abstract class DatabasedConfigManager<TLookup> : ConfigManager<TLookup>
-        where T : struct
+        where TLookup : struct, Enum
     {
         private readonly SettingsStore settings;
 
@@ -53,7 +54,7 @@ namespace osu.Game.Configuration
 
         private readonly List<DatabasedSetting> dirtySettings = new List<DatabasedSetting>();
 
-        protected override void AddBindable<TBindable>(T lookup, Bindable<TBindable> bindable)
+        protected override void AddBindable<TBindable>(TLookup lookup, Bindable<TBindable> bindable)
         {
             base.AddBindable(lookup, bindable);
 

osu.Game/Configuration/InMemoryConfigManager.cs

@@ -1,12 +1,13 @@
 // 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 osu.Framework.Configuration;
 
 namespace osu.Game.Configuration
 {
-    public class InMemoryConfigManager<T> : ConfigManager<T>
+    public class InMemoryConfigManager<TLookup> : ConfigManager<TLookup>
-        where T : struct
+        where TLookup : struct, Enum
     {
         public InMemoryConfigManager()
         {

osu.Game/Configuration/SettingSourceAttribute.cs

@@ -0,0 +1,110 @@
+// 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 System.Reflection;
+using JetBrains.Annotations;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.UserInterface;
+using osu.Game.Overlays.Settings;
+
+namespace osu.Game.Configuration
+{
+    /// <summary>
+    /// An attribute to mark a bindable as being exposed to the user via settings controls.
+    /// Can be used in conjunction with <see cref="SettingSourceExtensions.CreateSettingsControls"/> to automatically create UI controls.
+    /// </summary>
+    [MeansImplicitUse]
+    [AttributeUsage(AttributeTargets.Property)]
+    public class SettingSourceAttribute : Attribute
+    {
+        public string Label { get; }
+
+        public string Description { get; }
+
+        public SettingSourceAttribute(string label, string description = null)
+        {
+            Label = label ?? string.Empty;
+            Description = description ?? string.Empty;
+        }
+    }
+
+    public static class SettingSourceExtensions
+    {
+        public static IEnumerable<Drawable> CreateSettingsControls(this object obj)
+        {
+            foreach (var property in obj.GetType().GetProperties(BindingFlags.GetProperty | BindingFlags.Public | BindingFlags.Instance))
+            {
+                var attr = property.GetCustomAttribute<SettingSourceAttribute>(true);
+
+                if (attr == null)
+                    continue;
+
+                var prop = property.GetValue(obj);
+
+                switch (prop)
+                {
+                    case BindableNumber<float> bNumber:
+                        yield return new SettingsSlider<float>
+                        {
+                            LabelText = attr.Label,
+                            Bindable = bNumber
+                        };
+
+                        break;
+
+                    case BindableNumber<double> bNumber:
+                        yield return new SettingsSlider<double>
+                        {
+                            LabelText = attr.Label,
+                            Bindable = bNumber
+                        };
+
+                        break;
+
+                    case BindableNumber<int> bNumber:
+                        yield return new SettingsSlider<int>
+                        {
+                            LabelText = attr.Label,
+                            Bindable = bNumber
+                        };
+
+                        break;
+
+                    case Bindable<bool> bBool:
+                        yield return new SettingsCheckbox
+                        {
+                            LabelText = attr.Label,
+                            Bindable = bBool
+                        };
+
+                        break;
+
+                    case Bindable<string> bString:
+                        yield return new SettingsTextBox
+                        {
+                            LabelText = attr.Label,
+                            Bindable = bString
+                        };
+
+                        break;
+
+                    case IBindable bindable:
+                        var dropdownType = typeof(SettingsEnumDropdown<>).MakeGenericType(bindable.GetType().GetGenericArguments()[0]);
+                        var dropdown = (Drawable)Activator.CreateInstance(dropdownType);
+
+                        dropdown.GetType().GetProperty(nameof(IHasCurrentValue<object>.Current))?.SetValue(dropdown, obj);
+
+                        yield return dropdown;
+
+                        break;
+
+                    default:
+                        throw new InvalidOperationException($"{nameof(SettingSourceAttribute)} was attached to an unsupported type ({prop})");
+                }
+            }
+        }
+    }
+}

osu.Game/Graphics/IHasAccentColour.cs

@@ -24,7 +24,7 @@ namespace osu.Game.Graphics
         /// </summary>
         /// <returns>A <see cref="TransformSequence{T}"/> to which further transforms can be added.</returns>
         public static TransformSequence<T> FadeAccent<T>(this T accentedDrawable, Color4 newColour, double duration = 0, Easing easing = Easing.None)
-            where T : IHasAccentColour
+            where T : class, IHasAccentColour
             => accentedDrawable.TransformTo(nameof(accentedDrawable.AccentColour), newColour, duration, easing);
 
         /// <summary>

osu.Game/Graphics/UserInterface/OsuEnumDropdown.cs

@@ -6,12 +6,10 @@ using System;
 namespace osu.Game.Graphics.UserInterface
 {
     public class OsuEnumDropdown<T> : OsuDropdown<T>
+        where T : struct, Enum
     {
         public OsuEnumDropdown()
         {
-            if (!typeof(T).IsEnum)
-                throw new InvalidOperationException("OsuEnumDropdown only supports enums as the generic type argument");
-
             Items = (T[])Enum.GetValues(typeof(T));
         }
     }

osu.Game/Online/DownloadTrackingComposite.cs

@@ -26,7 +26,7 @@ namespace osu.Game.Online
         /// </summary>
         protected readonly Bindable<DownloadState> State = new Bindable<DownloadState>();
 
-        protected readonly Bindable<double> Progress = new Bindable<double>();
+        protected readonly BindableNumber<double> Progress = new BindableNumber<double> { MinValue = 0, MaxValue = 1 };
 
         protected DownloadTrackingComposite(TModel model = null)
         {

osu.Game/Online/Multiplayer/PlaylistItem.cs

@@ -45,23 +45,25 @@ namespace osu.Game.Online.Multiplayer
         [JsonProperty("beatmap")]
         private APIBeatmap apiBeatmap { get; set; }
 
+        private APIMod[] allowedModsBacking;
+
         [JsonProperty("allowed_mods")]
         private APIMod[] allowedMods
         {
             get => AllowedMods.Select(m => new APIMod { Acronym = m.Acronym }).ToArray();
-            set => _allowedMods = value;
+            set => allowedModsBacking = value;
         }
 
+        private APIMod[] requiredModsBacking;
+
         [JsonProperty("required_mods")]
         private APIMod[] requiredMods
         {
             get => RequiredMods.Select(m => new APIMod { Acronym = m.Acronym }).ToArray();
-            set => _requiredMods = value;
+            set => requiredModsBacking = value;
         }
 
         private BeatmapInfo beatmap;
-        private APIMod[] _allowedMods;
-        private APIMod[] _requiredMods;
 
         public void MapObjects(BeatmapManager beatmaps, RulesetStore rulesets)
         {
@@ -70,20 +72,20 @@ namespace osu.Game.Online.Multiplayer
             Beatmap = apiBeatmap == null ? beatmaps.QueryBeatmap(b => b.OnlineBeatmapID == BeatmapID) : apiBeatmap.ToBeatmap(rulesets);
             Ruleset = rulesets.GetRuleset(RulesetID);
 
-            if (_allowedMods != null)
+            if (allowedModsBacking != null)
             {
                 AllowedMods.Clear();
-                AllowedMods.AddRange(Ruleset.CreateInstance().GetAllMods().Where(mod => _allowedMods.Any(m => m.Acronym == mod.Acronym)));
+                AllowedMods.AddRange(Ruleset.CreateInstance().GetAllMods().Where(mod => allowedModsBacking.Any(m => m.Acronym == mod.Acronym)));
 
-                _allowedMods = null;
+                allowedModsBacking = null;
             }
 
-            if (_requiredMods != null)
+            if (requiredModsBacking != null)
             {
                 RequiredMods.Clear();
-                RequiredMods.AddRange(Ruleset.CreateInstance().GetAllMods().Where(mod => _requiredMods.Any(m => m.Acronym == mod.Acronym)));
+                RequiredMods.AddRange(Ruleset.CreateInstance().GetAllMods().Where(mod => requiredModsBacking.Any(m => m.Acronym == mod.Acronym)));
 
-                _requiredMods = null;
+                requiredModsBacking = null;
             }
         }
 

osu.Game/Overlays/MusicController.cs

@@ -261,8 +261,8 @@ namespace osu.Game.Overlays
 
             if (allowRateAdjustments)
             {
-                foreach (var mod in mods.Value.OfType<IApplicableToClock>())
+                foreach (var mod in mods.Value.OfType<IApplicableToTrack>())
-                    mod.ApplyToClock(track);
+                    mod.ApplyToTrack(track);
             }
         }
 

osu.Game/Overlays/SearchableList/DisplayStyleControl.cs

@@ -1,6 +1,7 @@
 // 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 osu.Framework.Bindables;
 using osuTK;
 using osu.Framework.Graphics;
@@ -11,6 +12,7 @@ using osu.Game.Graphics.Containers;
 namespace osu.Game.Overlays.SearchableList
 {
     public class DisplayStyleControl<T> : Container
+        where T : struct, Enum
     {
         public readonly SlimEnumDropdown<T> Dropdown;
         public readonly Bindable<PanelDisplayStyle> DisplayStyle = new Bindable<PanelDisplayStyle>();

osu.Game/Overlays/SearchableList/SearchableListFilterControl.cs

@@ -13,7 +13,9 @@ using osu.Framework.Graphics.Shapes;
 
 namespace osu.Game.Overlays.SearchableList
 {
-    public abstract class SearchableListFilterControl<T, U> : Container
+    public abstract class SearchableListFilterControl<TTab, TCategory> : Container
+        where TTab : struct, Enum
+        where TCategory : struct, Enum
     {
         private const float padding = 10;
 
@@ -21,12 +23,12 @@ namespace osu.Game.Overlays.SearchableList
         private readonly Box tabStrip;
 
         public readonly SearchTextBox Search;
-        public readonly PageTabControl<T> Tabs;
+        public readonly PageTabControl<TTab> Tabs;
-        public readonly DisplayStyleControl<U> DisplayStyleControl;
+        public readonly DisplayStyleControl<TCategory> DisplayStyleControl;
 
         protected abstract Color4 BackgroundColour { get; }
-        protected abstract T DefaultTab { get; }
+        protected abstract TTab DefaultTab { get; }
-        protected abstract U DefaultCategory { get; }
+        protected abstract TCategory DefaultCategory { get; }
         protected virtual Drawable CreateSupplementaryControls() => null;
 
         /// <summary>
@@ -36,9 +38,6 @@ namespace osu.Game.Overlays.SearchableList
 
         protected SearchableListFilterControl()
         {
-            if (!typeof(T).IsEnum)
-                throw new InvalidOperationException("SearchableListFilterControl's sort tabs only support enums as the generic type argument");
-
             RelativeSizeAxes = Axes.X;
 
             var controls = CreateSupplementaryControls();
@@ -90,7 +89,7 @@ namespace osu.Game.Overlays.SearchableList
                                     RelativeSizeAxes = Axes.X,
                                     AutoSizeAxes = Axes.Y,
                                     Padding = new MarginPadding { Right = 225 },
-                                    Child = Tabs = new PageTabControl<T>
+                                    Child = Tabs = new PageTabControl<TTab>
                                     {
                                         RelativeSizeAxes = Axes.X,
                                     },
@@ -105,7 +104,7 @@ namespace osu.Game.Overlays.SearchableList
                         },
                     },
                 },
-                DisplayStyleControl = new DisplayStyleControl<U>
+                DisplayStyleControl = new DisplayStyleControl<TCategory>
                 {
                     Anchor = Anchor.TopRight,
                     Origin = Anchor.TopRight,

osu.Game/Overlays/SearchableList/SearchableListHeader.cs

@@ -14,6 +14,7 @@ using osu.Framework.Graphics.Sprites;
 namespace osu.Game.Overlays.SearchableList
 {
     public abstract class SearchableListHeader<T> : Container
+        where T : struct, Enum
     {
         public readonly HeaderTabControl<T> Tabs;
 
@@ -24,9 +25,6 @@ namespace osu.Game.Overlays.SearchableList
 
         protected SearchableListHeader()
         {
-            if (!typeof(T).IsEnum)
-                throw new InvalidOperationException("BrowseHeader only supports enums as the generic type argument");
-
             RelativeSizeAxes = Axes.X;
             Height = 90;
 

osu.Game/Overlays/SearchableList/SearchableListOverlay.cs

@@ -1,6 +1,7 @@
 // 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 osuTK.Graphics;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -16,19 +17,22 @@ namespace osu.Game.Overlays.SearchableList
         public const float WIDTH_PADDING = 80;
     }
 
-    public abstract class SearchableListOverlay<T, U, S> : SearchableListOverlay
+    public abstract class SearchableListOverlay<THeader, TTab, TCategory> : SearchableListOverlay
+        where THeader : struct, Enum
+        where TTab : struct, Enum
+        where TCategory : struct, Enum
     {
         private readonly Container scrollContainer;
 
-        protected readonly SearchableListHeader<T> Header;
+        protected readonly SearchableListHeader<THeader> Header;
-        protected readonly SearchableListFilterControl<U, S> Filter;
+        protected readonly SearchableListFilterControl<TTab, TCategory> Filter;
         protected readonly FillFlowContainer ScrollFlow;
 
         protected abstract Color4 BackgroundColour { get; }
         protected abstract Color4 TrianglesColourLight { get; }
         protected abstract Color4 TrianglesColourDark { get; }
-        protected abstract SearchableListHeader<T> CreateHeader();
+        protected abstract SearchableListHeader<THeader> CreateHeader();
-        protected abstract SearchableListFilterControl<U, S> CreateFilterControl();
+        protected abstract SearchableListFilterControl<TTab, TCategory> CreateFilterControl();
 
         protected SearchableListOverlay()
         {

osu.Game/Overlays/SearchableList/SlimEnumDropdown.cs

@@ -1,6 +1,7 @@
 // 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 osuTK.Graphics;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
@@ -11,6 +12,7 @@ using osuTK;
 namespace osu.Game.Overlays.SearchableList
 {
     public class SlimEnumDropdown<T> : OsuEnumDropdown<T>
+        where T : struct, Enum
     {
         protected override DropdownHeader CreateHeader() => new SlimDropdownHeader();
 

osu.Game/Overlays/Settings/SettingsEnumDropdown.cs

@@ -1,12 +1,14 @@
 // 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 osu.Framework.Graphics;
 using osu.Game.Graphics.UserInterface;
 
 namespace osu.Game.Overlays.Settings
 {
     public class SettingsEnumDropdown<T> : SettingsDropdown<T>
+        where T : struct, Enum
     {
         protected override OsuDropdown<T> CreateDropdown() => new DropdownControl();
 

osu.Game/Overlays/Settings/SettingsItem.cs

@@ -53,27 +53,10 @@ namespace osu.Game.Overlays.Settings
             }
         }
 
-        // hold a reference to the provided bindable so we don't have to in every settings section.
-        private Bindable<T> bindable;
-
         public virtual Bindable<T> Bindable
         {
-            get => bindable;
+            get => controlWithCurrent.Current;
-
+            set => controlWithCurrent.Current = value;
-            set
-            {
-                if (bindable != null)
-                    controlWithCurrent?.Current.UnbindFrom(bindable);
-
-                bindable = value;
-                controlWithCurrent?.Current.BindTo(bindable);
-
-                if (ShowsDefaultIndicator)
-                {
-                    restoreDefaultButton.Bindable = bindable.GetBoundCopy();
-                    restoreDefaultButton.Bindable.TriggerChange();
-                }
-            }
         }
 
         public virtual IEnumerable<string> FilterTerms => Keywords == null ? new[] { LabelText } : new List<string>(Keywords) { LabelText }.ToArray();
@@ -110,7 +93,12 @@ namespace osu.Game.Overlays.Settings
         private void load()
         {
             if (controlWithCurrent != null)
+            {
                 controlWithCurrent.Current.DisabledChanged += disabled => { Colour = disabled ? Color4.Gray : Color4.White; };
+
+                if (ShowsDefaultIndicator)
+                    restoreDefaultButton.Bindable = controlWithCurrent.Current;
+            }
         }
 
         private class RestoreDefaultValueButton : Container, IHasTooltip
@@ -125,6 +113,7 @@ namespace osu.Game.Overlays.Settings
                     bindable = value;
                     bindable.ValueChanged += _ => UpdateState();
                     bindable.DisabledChanged += _ => UpdateState();
+                    UpdateState();
                 }
             }
 

osu.Game/Rulesets/Configuration/RulesetConfigManager.cs

@@ -1,12 +1,13 @@
 // 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 osu.Game.Configuration;
 
 namespace osu.Game.Rulesets.Configuration
 {
-    public abstract class RulesetConfigManager<T> : DatabasedConfigManager<T>, IRulesetConfigManager
+    public abstract class RulesetConfigManager<TLookup> : DatabasedConfigManager<TLookup>, IRulesetConfigManager
-        where T : struct
+        where TLookup : struct, Enum
     {
         protected RulesetConfigManager(SettingsStore settings, RulesetInfo ruleset, int? variant = null)
             : base(settings, ruleset, variant)

osu.Game/Rulesets/Difficulty/DifficultyCalculator.cs

@@ -4,8 +4,8 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using osu.Framework.Audio.Track;
 using osu.Framework.Extensions.IEnumerableExtensions;
-using osu.Framework.Timing;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Difficulty.Preprocessing;
 using osu.Game.Rulesets.Difficulty.Skills;
@@ -41,10 +41,10 @@ namespace osu.Game.Rulesets.Difficulty
 
             IBeatmap playableBeatmap = beatmap.GetPlayableBeatmap(ruleset.RulesetInfo, mods);
 
-            var clock = new StopwatchClock();
+            var track = new TrackVirtual(10000);
-            mods.OfType<IApplicableToClock>().ForEach(m => m.ApplyToClock(clock));
+            mods.OfType<IApplicableToTrack>().ForEach(m => m.ApplyToTrack(track));
 
-            return calculate(playableBeatmap, mods, clock.Rate);
+            return calculate(playableBeatmap, mods, track.Rate);
         }
 
         /// <summary>

osu.Game/Rulesets/Difficulty/PerformanceCalculator.cs

@@ -3,8 +3,8 @@
 
 using System.Collections.Generic;
 using System.Linq;
+using osu.Framework.Audio.Track;
 using osu.Framework.Extensions.IEnumerableExtensions;
-using osu.Framework.Timing;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Scoring;
@@ -35,9 +35,9 @@ namespace osu.Game.Rulesets.Difficulty
 
         protected virtual void ApplyMods(Mod[] mods)
         {
-            var clock = new StopwatchClock();
+            var track = new TrackVirtual(10000);
-            mods.OfType<IApplicableToClock>().ForEach(m => m.ApplyToClock(clock));
+            mods.OfType<IApplicableToTrack>().ForEach(m => m.ApplyToTrack(track));
-            TimeRate = clock.Rate;
+            TimeRate = track.Rate;
         }
 
         public abstract double Calculate(Dictionary<string, double> categoryDifficulty = null);

osu.Game/Rulesets/Mods/IApplicableToTrack.cs

@@ -1,15 +1,15 @@
 // 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.Timing;
+using osu.Framework.Audio.Track;
 
 namespace osu.Game.Rulesets.Mods
 {
     /// <summary>
     /// An interface for mods that make adjustments to the track.
     /// </summary>
-    public interface IApplicableToClock : IApplicableMod
+    public interface IApplicableToTrack : IApplicableMod
     {
-        void ApplyToClock(IAdjustableClock clock);
+        void ApplyToTrack(Track track);
     }
 }

osu.Game/Rulesets/Mods/ModDaycore.cs

@@ -1,9 +1,8 @@
 // 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.Audio;
+using osu.Framework.Audio.Track;
 using osu.Framework.Graphics.Sprites;
-using osu.Framework.Timing;
 
 namespace osu.Game.Rulesets.Mods
 {
@@ -14,12 +13,9 @@ namespace osu.Game.Rulesets.Mods
         public override IconUsage Icon => FontAwesome.Solid.Question;
         public override string Description => "Whoaaaaa...";
 
-        public override void ApplyToClock(IAdjustableClock clock)
+        public override void ApplyToTrack(Track track)
         {
-            if (clock is IHasPitchAdjust pitchAdjust)
+            track.Frequency.Value *= RateAdjust;
-                pitchAdjust.PitchAdjust *= RateAdjust;
-            else
-                base.ApplyToClock(clock);
         }
     }
 }

osu.Game/Rulesets/Mods/ModDoubleTime.cs

@@ -8,7 +8,7 @@ using osu.Game.Graphics;
 
 namespace osu.Game.Rulesets.Mods
 {
-    public abstract class ModDoubleTime : ModTimeAdjust, IApplicableToClock
+    public abstract class ModDoubleTime : ModTimeAdjust
     {
         public override string Name => "Double Time";
         public override string Acronym => "DT";

osu.Game/Rulesets/Mods/ModHalfTime.cs

@@ -8,7 +8,7 @@ using osu.Game.Graphics;
 
 namespace osu.Game.Rulesets.Mods
 {
-    public abstract class ModHalfTime : ModTimeAdjust, IApplicableToClock
+    public abstract class ModHalfTime : ModTimeAdjust
     {
         public override string Name => "Half Time";
         public override string Acronym => "HT";

osu.Game/Rulesets/Mods/ModNightcore.cs

@@ -1,9 +1,8 @@
 // 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.Audio;
+using osu.Framework.Audio.Track;
 using osu.Framework.Graphics.Sprites;
-using osu.Framework.Timing;
 using osu.Game.Graphics;
 
 namespace osu.Game.Rulesets.Mods
@@ -15,12 +14,9 @@ namespace osu.Game.Rulesets.Mods
         public override IconUsage Icon => OsuIcon.ModNightcore;
         public override string Description => "Uguuuuuuuu...";
 
-        public override void ApplyToClock(IAdjustableClock clock)
+        public override void ApplyToTrack(Track track)
         {
-            if (clock is IHasPitchAdjust pitchAdjust)
+            track.Frequency.Value *= RateAdjust;
-                pitchAdjust.PitchAdjust *= RateAdjust;
-            else
-                base.ApplyToClock(clock);
         }
     }
 }

osu.Game/Rulesets/Mods/ModTimeAdjust.cs

@@ -2,23 +2,19 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
-using osu.Framework.Audio;
+using osu.Framework.Audio.Track;
-using osu.Framework.Timing;
 
 namespace osu.Game.Rulesets.Mods
 {
-    public abstract class ModTimeAdjust : Mod
+    public abstract class ModTimeAdjust : Mod, IApplicableToTrack
     {
         public override Type[] IncompatibleMods => new[] { typeof(ModTimeRamp) };
 
         protected abstract double RateAdjust { get; }
 
-        public virtual void ApplyToClock(IAdjustableClock clock)
+        public virtual void ApplyToTrack(Track track)
         {
-            if (clock is IHasTempoAdjust tempo)
+            track.Tempo.Value *= RateAdjust;
-                tempo.TempoAdjust *= RateAdjust;
-            else
-                clock.Rate *= RateAdjust;
         }
     }
 }

osu.Game/Rulesets/Mods/ModTimeRamp.cs

@@ -3,15 +3,14 @@
 
 using System;
 using System.Linq;
-using osu.Framework.Audio;
+using osu.Framework.Audio.Track;
-using osu.Framework.Timing;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.UI;
 using osu.Game.Rulesets.Objects;
 
 namespace osu.Game.Rulesets.Mods
 {
-    public abstract class ModTimeRamp : Mod, IUpdatableByPlayfield, IApplicableToClock, IApplicableToBeatmap
+    public abstract class ModTimeRamp : Mod, IUpdatableByPlayfield, IApplicableToTrack, IApplicableToBeatmap
     {
         /// <summary>
         /// The point in the beatmap at which the final ramping rate should be reached.
@@ -24,11 +23,11 @@ namespace osu.Game.Rulesets.Mods
 
         private double finalRateTime;
         private double beginRampTime;
-        private IAdjustableClock clock;
+        private Track track;
 
-        public virtual void ApplyToClock(IAdjustableClock clock)
+        public virtual void ApplyToTrack(Track track)
         {
-            this.clock = clock;
+            this.track = track;
 
             lastAdjust = 1;
 
@@ -46,7 +45,7 @@ namespace osu.Game.Rulesets.Mods
 
         public virtual void Update(Playfield playfield)
         {
-            applyAdjustment((clock.CurrentTime - beginRampTime) / finalRateTime);
+            applyAdjustment((track.CurrentTime - beginRampTime) / finalRateTime);
         }
 
         private double lastAdjust = 1;
@@ -59,23 +58,8 @@ namespace osu.Game.Rulesets.Mods
         {
             double adjust = 1 + (Math.Sign(FinalRateAdjustment) * Math.Clamp(amount, 0, 1) * Math.Abs(FinalRateAdjustment));
 
-            switch (clock)
+            track.Tempo.Value /= lastAdjust;
-            {
+            track.Tempo.Value *= adjust;
-                case IHasPitchAdjust pitch:
-                    pitch.PitchAdjust /= lastAdjust;
-                    pitch.PitchAdjust *= adjust;
-                    break;
-
-                case IHasTempoAdjust tempo:
-                    tempo.TempoAdjust /= lastAdjust;
-                    tempo.TempoAdjust *= adjust;
-                    break;
-
-                default:
-                    clock.Rate /= lastAdjust;
-                    clock.Rate *= adjust;
-                    break;
-            }
 
             lastAdjust = adjust;
         }

osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs

@@ -257,14 +257,13 @@ namespace osu.Game.Rulesets.Objects.Legacy
         {
             if (type == PathType.PerfectCurve)
             {
-                if (vertices.Length == 3)
+                if (vertices.Length != 3)
+                    type = PathType.Bezier;
+                else if (isLinear(vertices))
                 {
                     // osu-stable special-cased colinear perfect curves to a linear path
-                    if (isLinear(vertices))
                     type = PathType.Linear;
                 }
-                else
-                    type = PathType.Bezier;
             }
 
             var points = new List<PathControlPoint>(vertices.Length)

osu.Game/Rulesets/Objects/PathControlPoint.cs

@@ -30,8 +30,9 @@ namespace osu.Game.Rulesets.Objects
         /// Creates a new <see cref="PathControlPoint"/>.
         /// </summary>
         public PathControlPoint()
-            : this(Vector2.Zero, null)
         {
+            Position.ValueChanged += _ => Changed?.Invoke();
+            Type.ValueChanged += _ => Changed?.Invoke();
         }
 
         /// <summary>
@@ -40,12 +41,10 @@ namespace osu.Game.Rulesets.Objects
         /// <param name="position">The initial position.</param>
         /// <param name="type">The initial type.</param>
         public PathControlPoint(Vector2 position, PathType? type = null)
+            : this()
         {
             Position.Value = position;
             Type.Value = type;
-
-            Position.ValueChanged += _ => Changed?.Invoke();
-            Type.ValueChanged += _ => Changed?.Invoke();
         }
 
         public bool Equals(PathControlPoint other) => Position.Value == other?.Position.Value && Type.Value == other.Type.Value;

osu.Game/Rulesets/UI/DrawableRuleset.cs

@@ -511,15 +511,19 @@ namespace osu.Game.Rulesets.UI
 
         public IEnumerable<string> GetAvailableResources() => throw new NotImplementedException();
 
-        public void AddAdjustment(AdjustableProperty type, BindableDouble adjustBindable) => throw new NotImplementedException();
+        public void AddAdjustment(AdjustableProperty type, BindableNumber<double> adjustBindable) => throw new NotImplementedException();
 
-        public void RemoveAdjustment(AdjustableProperty type, BindableDouble adjustBindable) => throw new NotImplementedException();
+        public void RemoveAdjustment(AdjustableProperty type, BindableNumber<double> adjustBindable) => throw new NotImplementedException();
 
-        public BindableDouble Volume => throw new NotImplementedException();
+        public BindableNumber<double> Volume => throw new NotImplementedException();
 
-        public BindableDouble Balance => throw new NotImplementedException();
+        public BindableNumber<double> Balance => throw new NotImplementedException();
 
-        public BindableDouble Frequency => throw new NotImplementedException();
+        public BindableNumber<double> Frequency => throw new NotImplementedException();
+
+        public BindableNumber<double> Tempo => throw new NotImplementedException();
+
+        public IBindable<double> GetAggregate(AdjustableProperty type) => throw new NotImplementedException();
 
         public IBindable<double> AggregateVolume => throw new NotImplementedException();
 
@@ -527,6 +531,8 @@ namespace osu.Game.Rulesets.UI
 
         public IBindable<double> AggregateFrequency => throw new NotImplementedException();
 
+        public IBindable<double> AggregateTempo => throw new NotImplementedException();
+
         public int PlaybackConcurrency
         {
             get => throw new NotImplementedException();

osu.Game/Screens/Play/GameplayClockContainer.cs

@@ -28,9 +28,9 @@ namespace osu.Game.Screens.Play
         private readonly IReadOnlyList<Mod> mods;
 
         /// <summary>
-        /// The original source (usually a <see cref="WorkingBeatmap"/>'s track).
+        /// The <see cref="WorkingBeatmap"/>'s track.
         /// </summary>
-        private IAdjustableClock sourceClock;
+        private Track track;
 
         public readonly BindableBool IsPaused = new BindableBool();
 
@@ -72,8 +72,8 @@ namespace osu.Game.Screens.Play
 
             RelativeSizeAxes = Axes.Both;
 
-            sourceClock = (IAdjustableClock)beatmap.Track ?? new StopwatchClock();
+            track = beatmap.Track;
-            (sourceClock as IAdjustableAudioComponent)?.AddAdjustment(AdjustableProperty.Frequency, pauseFreqAdjust);
+            track.AddAdjustment(AdjustableProperty.Frequency, pauseFreqAdjust);
 
             adjustableClock = new DecoupleableInterpolatingFramedClock { IsCoupled = false };
 
@@ -127,11 +127,11 @@ namespace osu.Game.Screens.Play
         {
             Task.Run(() =>
             {
-                sourceClock.Reset();
+                track.Reset();
 
                 Schedule(() =>
                 {
-                    adjustableClock.ChangeSource(sourceClock);
+                    adjustableClock.ChangeSource(track);
                     updateRate();
 
                     if (!IsPaused.Value)
@@ -197,13 +197,13 @@ namespace osu.Game.Screens.Play
         /// </summary>
         public void StopUsingBeatmapClock()
         {
-            if (sourceClock != beatmap.Track)
+            if (track != beatmap.Track)
                 return;
 
             removeSourceClockAdjustments();
 
-            sourceClock = new TrackVirtual(beatmap.Track.Length);
+            track = new TrackVirtual(beatmap.Track.Length);
-            adjustableClock.ChangeSource(sourceClock);
+            adjustableClock.ChangeSource(track);
         }
 
         protected override void Update()
@@ -218,18 +218,15 @@ namespace osu.Game.Screens.Play
 
         private void updateRate()
         {
-            if (sourceClock == null) return;
+            if (track == null) return;
 
             speedAdjustmentsApplied = true;
-            sourceClock.ResetSpeedAdjustments();
+            track.ResetSpeedAdjustments();
 
-            if (sourceClock is IHasTempoAdjust tempo)
+            track.Tempo.Value = UserPlaybackRate.Value;
-                tempo.TempoAdjust = UserPlaybackRate.Value;
-            else
-                sourceClock.Rate = UserPlaybackRate.Value;
 
-            foreach (var mod in mods.OfType<IApplicableToClock>())
+            foreach (var mod in mods.OfType<IApplicableToTrack>())
-                mod.ApplyToClock(sourceClock);
+                mod.ApplyToTrack(track);
         }
 
         protected override void Dispose(bool isDisposing)
@@ -237,18 +234,18 @@ namespace osu.Game.Screens.Play
             base.Dispose(isDisposing);
 
             removeSourceClockAdjustments();
-            sourceClock = null;
+            track = null;
         }
 
         private void removeSourceClockAdjustments()
         {
             if (speedAdjustmentsApplied)
             {
-                sourceClock.ResetSpeedAdjustments();
+                track.ResetSpeedAdjustments();
                 speedAdjustmentsApplied = false;
             }
 
-            (sourceClock as IAdjustableAudioComponent)?.RemoveAdjustment(AdjustableProperty.Frequency, pauseFreqAdjust);
+            track.RemoveAdjustment(AdjustableProperty.Frequency, pauseFreqAdjust);
         }
     }
 }

osu.Game/Screens/Play/GameplayMenuOverlay.cs

@@ -188,26 +188,22 @@ namespace osu.Game.Screens.Play
             InternalButtons.Add(button);
         }
 
-        private int _selectionIndex = -1;
+        private int selectionIndex = -1;
 
-        private int selectionIndex
+        private void setSelected(int value)
         {
-            get => _selectionIndex;
+            if (selectionIndex == value)
-            set
-            {
-                if (_selectionIndex == value)
                 return;
 
             // Deselect the previously-selected button
-                if (_selectionIndex != -1)
+            if (selectionIndex != -1)
-                    InternalButtons[_selectionIndex].Selected.Value = false;
+                InternalButtons[selectionIndex].Selected.Value = false;
 
-                _selectionIndex = value;
+            selectionIndex = value;
 
             // Select the newly-selected button
-                if (_selectionIndex != -1)
+            if (selectionIndex != -1)
-                    InternalButtons[_selectionIndex].Selected.Value = true;
+                InternalButtons[selectionIndex].Selected.Value = true;
-            }
         }
 
         protected override bool OnKeyDown(KeyDownEvent e)
@@ -218,16 +214,16 @@ namespace osu.Game.Screens.Play
                 {
                     case Key.Up:
                         if (selectionIndex == -1 || selectionIndex == 0)
-                            selectionIndex = InternalButtons.Count - 1;
+                            setSelected(InternalButtons.Count - 1);
                         else
-                            selectionIndex--;
+                            setSelected(selectionIndex - 1);
                         return true;
 
                     case Key.Down:
                         if (selectionIndex == -1 || selectionIndex == InternalButtons.Count - 1)
-                            selectionIndex = 0;
+                            setSelected(0);
                         else
-                            selectionIndex++;
+                            setSelected(selectionIndex + 1);
                         return true;
                 }
             }
@@ -266,9 +262,9 @@ namespace osu.Game.Screens.Play
         private void buttonSelectionChanged(DialogButton button, bool isSelected)
         {
             if (!isSelected)
-                selectionIndex = -1;
+                setSelected(-1);
             else
-                selectionIndex = InternalButtons.IndexOf(button);
+                setSelected(InternalButtons.IndexOf(button));
         }
 
         private void updateRetryCount()

osu.Game/Screens/Select/FilterCriteria.cs

@@ -44,7 +44,7 @@ namespace osu.Game.Screens.Select
         }
 
         public struct OptionalRange<T> : IEquatable<OptionalRange<T>>
-            where T : struct, IComparable
+            where T : struct
         {
             public bool HasFilter => Max != null || Min != null;
 

osu.Game/Screens/Select/FilterQueryParser.cs

@@ -170,7 +170,7 @@ namespace osu.Game.Screens.Select
         }
 
         private static void updateCriteriaRange<T>(ref FilterCriteria.OptionalRange<T> range, string op, T value)
-            where T : struct, IComparable
+            where T : struct
         {
             switch (op)
             {

osu.Game/Screens/Select/SongSelect.cs

@@ -262,8 +262,10 @@ namespace osu.Game.Screens.Select
 
         protected virtual void ApplyFilterToCarousel(FilterCriteria criteria)
         {
-            if (this.IsCurrentScreen())
+            // if not the current screen, we want to get carousel in a good presentation state before displaying (resume or enter).
-                Carousel.Filter(criteria);
+            bool shouldDebounce = this.IsCurrentScreen();
+
+            Schedule(() => Carousel.Filter(criteria, shouldDebounce));
         }
 
         private DependencyContainer dependencies;
@@ -437,8 +439,6 @@ namespace osu.Game.Screens.Select
         {
             base.OnEntering(last);
 
-            Carousel.Filter(FilterControl.CreateCriteria(), false);
-
             this.FadeInFromZero(250);
             FilterControl.Activate();
         }

osu.Game/Skinning/SkinConfigManager.cs

@@ -1,11 +1,12 @@
 // 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 osu.Framework.Configuration;
 
 namespace osu.Game.Skinning
 {
-    public class SkinConfigManager<T> : ConfigManager<T> where T : struct
+    public class SkinConfigManager<TLookup> : ConfigManager<TLookup> where TLookup : struct, Enum
     {
         protected override void PerformLoad()
         {

osu.Game/Storyboards/Drawables/IFlippable.cs

@@ -41,7 +41,7 @@ namespace osu.Game.Storyboards.Drawables
         /// </summary>
         /// <returns>A <see cref="TransformSequence{T}"/> to which further transforms can be added.</returns>
         public static TransformSequence<T> TransformFlipH<T>(this T flippable, bool newValue, double delay = 0)
-            where T : IFlippable
+            where T : class, IFlippable
             => flippable.TransformTo(flippable.PopulateTransform(new TransformFlipH(), newValue, delay));
 
         /// <summary>
@@ -49,7 +49,7 @@ namespace osu.Game.Storyboards.Drawables
         /// </summary>
         /// <returns>A <see cref="TransformSequence{T}"/> to which further transforms can be added.</returns>
         public static TransformSequence<T> TransformFlipV<T>(this T flippable, bool newValue, double delay = 0)
-            where T : IFlippable
+            where T : class, IFlippable
             => flippable.TransformTo(flippable.PopulateTransform(new TransformFlipV(), newValue, delay));
     }
 }

osu.Game/Tests/Visual/RateAdjustedBeatmapTestScene.cs

@@ -13,7 +13,7 @@ namespace osu.Game.Tests.Visual
             base.Update();
 
             // note that this will override any mod rate application
-            Beatmap.Value.Track.TempoAdjust = Clock.Rate;
+            Beatmap.Value.Track.Tempo.Value = Clock.Rate;
         }
     }
 }

osu.Game/Tests/Visual/ScreenTestScene.cs

@@ -12,7 +12,7 @@ namespace osu.Game.Tests.Visual
     /// </summary>
     public abstract class ScreenTestScene : ManualInputManagerTestScene
     {
-        private readonly OsuScreenStack stack;
+        protected readonly OsuScreenStack Stack;
 
         private readonly Container content;
 
@@ -22,16 +22,16 @@ namespace osu.Game.Tests.Visual
         {
             base.Content.AddRange(new Drawable[]
             {
-                stack = new OsuScreenStack { RelativeSizeAxes = Axes.Both },
+                Stack = new OsuScreenStack { RelativeSizeAxes = Axes.Both },
                 content = new Container { RelativeSizeAxes = Axes.Both }
             });
         }
 
         protected void LoadScreen(OsuScreen screen)
         {
-            if (stack.CurrentScreen != null)
+            if (Stack.CurrentScreen != null)
-                stack.Exit();
+                Stack.Exit();
-            stack.Push(screen);
+            Stack.Push(screen);
         }
     }
 }

osu.Game/osu.Game.csproj

@@ -23,7 +23,7 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite.Core" Version="2.2.6" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="ppy.osu.Game.Resources" Version="2019.1010.0" />
-    <PackageReference Include="ppy.osu.Framework" Version="2019.1205.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2019.1210.1" />
     <PackageReference Include="Sentry" Version="1.2.0" />
     <PackageReference Include="SharpCompress" Version="0.24.0" />
     <PackageReference Include="NUnit" Version="3.12.0" />

osu.iOS.props

@@ -74,7 +74,7 @@
   </ItemGroup>
   <ItemGroup Label="Package References">
     <PackageReference Include="ppy.osu.Game.Resources" Version="2019.1010.0" />
-    <PackageReference Include="ppy.osu.Framework.iOS" Version="2019.1205.0" />
+    <PackageReference Include="ppy.osu.Framework.iOS" Version="2019.1210.1" />
   </ItemGroup>
   <!-- Xamarin.iOS does not automatically handle transitive dependencies from NuGet packages. -->
   <ItemGroup Label="Transitive Dependencies">
@@ -82,7 +82,7 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.2.6" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite.Core" Version="2.2.6" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-    <PackageReference Include="ppy.osu.Framework" Version="2019.1205.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2019.1210.1" />
     <PackageReference Include="SharpCompress" Version="0.24.0" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="SharpRaven" Version="2.4.0" />