Merge remote-tracking branch 'upstream/master' into generic-download-model-manager

README.md

@@ -72,7 +72,7 @@ If the build fails, try to restore nuget packages with `dotnet restore`.
 
 On Linux, the environment variable `LD_LIBRARY_PATH` must point to the build directory, located at `osu.Desktop/bin/Debug/$NETCORE_VERSION`.
 
-`$NETCORE_VERSION` is the version of .NET Core SDK. You can have it with `grep TargetFramework osu.Desktop/osu.Desktop.csproj | sed -r 's/.*>(.*)<\/.*/\1/'`.
+`$NETCORE_VERSION` is the version of the targeted .NET Core SDK. You can check it by running `grep TargetFramework osu.Desktop/osu.Desktop.csproj | sed -r 's/.*>(.*)<\/.*/\1/'`.
 
 For example, you can run osu! with the following command:
 

osu.Game.Rulesets.Osu/UI/Cursor/OsuCursorContainer.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.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
@@ -73,7 +74,10 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
             {
                 case OsuAction.LeftButton:
                 case OsuAction.RightButton:
-                    if (--downCount == 0)
+                    // Todo: Math.Max() is required as a temporary measure to address https://github.com/ppy/osu-framework/issues/2576
+                    downCount = Math.Max(0, downCount - 1);
+
+                    if (downCount == 0)
                         updateExpandedState();
                     break;
             }

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

@@ -0,0 +1,52 @@
+// 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 osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics.UserInterface;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    public class TestSceneBackButton : OsuTestScene
+    {
+        private readonly BackButton button;
+
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(TwoLayerButton)
+        };
+
+        public TestSceneBackButton()
+        {
+            Child = new Container
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                Size = new Vector2(300),
+                Masking = true,
+                Children = new Drawable[]
+                {
+                    new Box
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Colour = Color4.SlateGray
+                    },
+                    button = new BackButton
+                    {
+                        Anchor = Anchor.BottomLeft,
+                        Origin = Anchor.BottomLeft,
+                        Action = () => button.Hide(),
+                    }
+                }
+            };
+
+            AddStep("show button", () => button.Show());
+            AddStep("hide button", () => button.Hide());
+        }
+    }
+}

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

@@ -1,17 +1,26 @@
 // 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.ComponentModel;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics.Sprites;
 using osu.Game.Graphics.UserInterface;
+using osuTK;
+using osuTK.Graphics;
 
 namespace osu.Game.Tests.Visual.UserInterface
 {
-    [Description("mostly back button")]
     public class TestSceneTwoLayerButton : OsuTestScene
     {
         public TestSceneTwoLayerButton()
         {
-            Add(new BackButton());
+            Add(new TwoLayerButton
+            {
+                Position = new Vector2(100),
+                Text = "button",
+                Icon = FontAwesome.Solid.Check,
+                BackgroundColour = Color4.SlateGray,
+                HoverColour = Color4.SlateGray.Darken(0.2f)
+            });
         }
     }
 }

osu.Game/Graphics/UserInterface/BackButton.cs

@@ -1,26 +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 System;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Input.Bindings;
+using osu.Game.Input.Bindings;
 
 namespace osu.Game.Graphics.UserInterface
 {
-    public class BackButton : TwoLayerButton
+    public class BackButton : VisibilityContainer, IKeyBindingHandler<GlobalAction>
     {
+        public Action Action;
+
+        private readonly TwoLayerButton button;
+
         public BackButton()
         {
-            Text = @"back";
+            Size = TwoLayerButton.SIZE_EXTENDED;
-            Icon = OsuIcon.LeftCircle;
+
-            Anchor = Anchor.BottomLeft;
+            Child = button = new TwoLayerButton
-            Origin = Anchor.BottomLeft;
+            {
+                Anchor = Anchor.CentreLeft,
+                Origin = Anchor.CentreLeft,
+                Text = @"back",
+                Icon = OsuIcon.LeftCircle,
+                Action = () => Action?.Invoke()
+            };
         }
 
         [BackgroundDependencyLoader]
         private void load(OsuColour colours)
         {
-            BackgroundColour = colours.Pink;
+            button.BackgroundColour = colours.Pink;
-            HoverColour = colours.PinkDark;
+            button.HoverColour = colours.PinkDark;
+        }
+
+        public bool OnPressed(GlobalAction action)
+        {
+            if (action == GlobalAction.Back)
+            {
+                Action?.Invoke();
+                return true;
+            }
+
+            return false;
+        }
+
+        public bool OnReleased(GlobalAction action) => action == GlobalAction.Back;
+
+        protected override void PopIn()
+        {
+            button.MoveToX(0, 400, Easing.OutQuint);
+            button.FadeIn(150, Easing.OutQuint);
+        }
+
+        protected override void PopOut()
+        {
+            button.MoveToX(-TwoLayerButton.SIZE_EXTENDED.X / 2, 400, Easing.OutQuint);
+            button.FadeOut(400, Easing.OutQuint);
         }
     }
 }

osu.Game/Graphics/UserInterface/OsuDropdown.cs

@@ -9,6 +9,7 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.UserInterface;
+using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.Sprites;
 using osuTK;
 
@@ -97,6 +98,8 @@ namespace osu.Game.Graphics.UserInterface
 
             protected override DrawableMenuItem CreateDrawableMenuItem(MenuItem item) => new DrawableOsuDropdownMenuItem(item) { AccentColour = accentColour };
 
+            protected override ScrollContainer<Drawable> CreateScrollContainer(Direction direction) => new OsuScrollContainer(direction);
+
             #region DrawableOsuDropdownMenuItem
 
             public class DrawableOsuDropdownMenuItem : DrawableDropdownMenuItem, IHasAccentColour
@@ -247,8 +250,8 @@ namespace osu.Game.Graphics.UserInterface
                         Icon = FontAwesome.Solid.ChevronDown,
                         Anchor = Anchor.CentreRight,
                         Origin = Anchor.CentreRight,
-                        Margin = new MarginPadding { Right = 4 },
+                        Margin = new MarginPadding { Right = 5 },
-                        Size = new Vector2(20),
+                        Size = new Vector2(12),
                     },
                 };
 

osu.Game/Graphics/UserInterface/OsuMenu.cs

@@ -11,6 +11,7 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.UserInterface;
 using osu.Framework.Input.Events;
+using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.Sprites;
 using osuTK;
 
@@ -46,6 +47,8 @@ namespace osu.Game.Graphics.UserInterface
 
         protected override DrawableMenuItem CreateDrawableMenuItem(MenuItem item) => new DrawableOsuMenuItem(item);
 
+        protected override ScrollContainer<Drawable> CreateScrollContainer(Direction direction) => new OsuScrollContainer(direction);
+
         protected override Menu CreateSubMenu() => new OsuMenu(Direction.Vertical)
         {
             Anchor = Direction == Direction.Horizontal ? Anchor.BottomLeft : Anchor.TopRight

osu.Game/Graphics/UserInterface/TwoLayerButton.cs

@@ -165,7 +165,8 @@ namespace osu.Game.Graphics.UserInterface
         protected override bool OnHover(HoverEvent e)
         {
             this.ResizeTo(SIZE_EXTENDED, transform_time, Easing.OutElastic);
-            IconLayer.FadeColour(HoverColour, transform_time, Easing.OutElastic);
+
+            IconLayer.FadeColour(HoverColour, transform_time / 2f, Easing.OutQuint);
 
             bouncingIcon.ScaleTo(1.1f, transform_time, Easing.OutElastic);
 
@@ -174,16 +175,13 @@ namespace osu.Game.Graphics.UserInterface
 
         protected override void OnHoverLost(HoverLostEvent e)
         {
-            this.ResizeTo(SIZE_RETRACTED, transform_time, Easing.OutElastic);
+            this.ResizeTo(SIZE_RETRACTED, transform_time, Easing.Out);
-            IconLayer.FadeColour(TextLayer.Colour, transform_time, Easing.OutElastic);
+            IconLayer.FadeColour(TextLayer.Colour, transform_time, Easing.Out);
 
-            bouncingIcon.ScaleTo(1, transform_time, Easing.OutElastic);
+            bouncingIcon.ScaleTo(1, transform_time, Easing.Out);
         }
 
-        protected override bool OnMouseDown(MouseDownEvent e)
+        protected override bool OnMouseDown(MouseDownEvent e) => true;
-        {
-            return true;
-        }
 
         protected override bool OnClick(ClickEvent e)
         {

osu.Game/Input/Bindings/GlobalActionContainer.cs

@@ -50,6 +50,7 @@ namespace osu.Game.Input.Bindings
         {
             new KeyBinding(InputKey.Space, GlobalAction.SkipCutscene),
             new KeyBinding(InputKey.Tilde, GlobalAction.QuickRetry),
+            new KeyBinding(new[] { InputKey.Control, InputKey.Tilde }, GlobalAction.QuickExit),
             new KeyBinding(new[] { InputKey.Control, InputKey.Plus }, GlobalAction.IncreaseScrollSpeed),
             new KeyBinding(new[] { InputKey.Control, InputKey.Minus }, GlobalAction.DecreaseScrollSpeed),
         };
@@ -111,5 +112,8 @@ namespace osu.Game.Input.Bindings
 
         [Description("Select")]
         Select,
+
+        [Description("Quick exit (Hold)")]
+        QuickExit,
     }
 }

osu.Game/Online/API/APIRequest.cs

@@ -88,7 +88,12 @@ namespace osu.Game.Online.API
             if (checkAndScheduleFailure())
                 return;
 
-            API.Schedule(delegate { Success?.Invoke(); });
+            API.Schedule(delegate
+            {
+                if (cancelled) return;
+
+                Success?.Invoke();
+            });
         }
 
         public void Cancel() => Fail(new OperationCanceledException(@"Request cancelled"));

osu.Game/OsuGame.cs

@@ -29,6 +29,7 @@ using osu.Framework.Threading;
 using osu.Game.Beatmaps;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Containers;
+using osu.Game.Graphics.UserInterface;
 using osu.Game.Input;
 using osu.Game.Overlays.Notifications;
 using osu.Game.Screens.Play;
@@ -82,6 +83,7 @@ namespace osu.Game
         private OsuScreenStack screenStack;
         private VolumeOverlay volume;
         private OsuLogo osuLogo;
+        private BackButton backButton;
 
         private MainMenu menuScreen;
         private Intro introScreen;
@@ -399,6 +401,16 @@ namespace osu.Game
                     Children = new Drawable[]
                     {
                         screenStack = new OsuScreenStack { RelativeSizeAxes = Axes.Both },
+                        backButton = new BackButton
+                        {
+                            Anchor = Anchor.BottomLeft,
+                            Origin = Anchor.BottomLeft,
+                            Action = () =>
+                            {
+                                if ((screenStack.CurrentScreen as IOsuScreen)?.AllowBackButton == true)
+                                    screenStack.Exit();
+                            }
+                        },
                         logoContainer = new Container { RelativeSizeAxes = Axes.Both },
                     }
                 },
@@ -795,6 +807,11 @@ namespace osu.Game
                     CloseAllOverlays();
                 else
                     Toolbar.Show();
+
+                if (newOsuScreen.AllowBackButton)
+                    backButton.Show();
+                else
+                    backButton.Hide();
             }
         }
 

osu.Game/Overlays/BeatmapSet/Header.cs

@@ -8,7 +8,6 @@ using osu.Framework.Graphics.Colour;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Effects;
 using osu.Framework.Graphics.Shapes;
-using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.Drawables;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
@@ -40,6 +39,10 @@ namespace osu.Game.Overlays.BeatmapSet
 
         private readonly FavouriteButton favouriteButton;
 
+        private readonly FillFlowContainer fadeContent;
+
+        private readonly LoadingAnimation loading;
+
         public Header()
         {
             ExternalLinkButton externalLink;
@@ -96,8 +99,7 @@ namespace osu.Game.Overlays.BeatmapSet
                         },
                         new Container
                         {
-                            RelativeSizeAxes = Axes.X,
+                            RelativeSizeAxes = Axes.Both,
-                            AutoSizeAxes = Axes.Y,
                             Padding = new MarginPadding
                             {
                                 Top = 20,
@@ -105,63 +107,71 @@ namespace osu.Game.Overlays.BeatmapSet
                                 Left = BeatmapSetOverlay.X_PADDING,
                                 Right = BeatmapSetOverlay.X_PADDING + BeatmapSetOverlay.RIGHT_WIDTH,
                             },
-                            Child = new FillFlowContainer
+                            Children = new Drawable[]
                             {
-                                RelativeSizeAxes = Axes.X,
+                                fadeContent = new FillFlowContainer
-                                AutoSizeAxes = Axes.Y,
-                                Direction = FillDirection.Vertical,
-                                Children = new Drawable[]
                                 {
-                                    new Container
+                                    RelativeSizeAxes = Axes.X,
+                                    AutoSizeAxes = Axes.Y,
+                                    Direction = FillDirection.Vertical,
+                                    Children = new Drawable[]
                                     {
-                                        RelativeSizeAxes = Axes.X,
+                                        new Container
-                                        AutoSizeAxes = Axes.Y,
-                                        Child = Picker = new BeatmapPicker(),
-                                    },
-                                    new FillFlowContainer
-                                    {
-                                        Direction = FillDirection.Horizontal,
-                                        AutoSizeAxes = Axes.Both,
-                                        Children = new Drawable[]
                                         {
-                                            title = new OsuSpriteText
+                                            RelativeSizeAxes = Axes.X,
-                                            {
+                                            AutoSizeAxes = Axes.Y,
-                                                Font = OsuFont.GetFont(size: 37, weight: FontWeight.Bold, italics: true)
+                                            Child = Picker = new BeatmapPicker(),
-                                            },
+                                        },
-                                            externalLink = new ExternalLinkButton
+                                        new FillFlowContainer
-                                            {
-                                                Anchor = Anchor.BottomLeft,
-                                                Origin = Anchor.BottomLeft,
-                                                Margin = new MarginPadding { Left = 3, Bottom = 4 }, //To better lineup with the font
-                                            },
-                                        }
-                                    },
-                                    artist = new OsuSpriteText { Font = OsuFont.GetFont(size: 25, weight: FontWeight.SemiBold, italics: true) },
-                                    new Container
-                                    {
-                                        RelativeSizeAxes = Axes.X,
-                                        AutoSizeAxes = Axes.Y,
-                                        Margin = new MarginPadding { Top = 20 },
-                                        Child = author = new AuthorInfo(),
-                                    },
-                                    new Container
-                                    {
-                                        RelativeSizeAxes = Axes.X,
-                                        Height = buttons_height,
-                                        Margin = new MarginPadding { Top = 10 },
-                                        Children = new Drawable[]
                                         {
-                                            favouriteButton = new FavouriteButton(),
+                                            Direction = FillDirection.Horizontal,
-                                            downloadButtonsContainer = new FillFlowContainer
+                                            AutoSizeAxes = Axes.Both,
+                                            Children = new Drawable[]
                                             {
-                                                RelativeSizeAxes = Axes.Both,
+                                                title = new OsuSpriteText
-                                                Padding = new MarginPadding { Left = buttons_height + buttons_spacing },
+                                                {
-                                                Spacing = new Vector2(buttons_spacing),
+                                                    Font = OsuFont.GetFont(size: 37, weight: FontWeight.Bold, italics: true)
+                                                },
+                                                externalLink = new ExternalLinkButton
+                                                {
+                                                    Anchor = Anchor.BottomLeft,
+                                                    Origin = Anchor.BottomLeft,
+                                                    Margin = new MarginPadding { Left = 3, Bottom = 4 }, //To better lineup with the font
+                                                },
+                                            }
+                                        },
+                                        artist = new OsuSpriteText { Font = OsuFont.GetFont(size: 25, weight: FontWeight.SemiBold, italics: true) },
+                                        new Container
+                                        {
+                                            RelativeSizeAxes = Axes.X,
+                                            AutoSizeAxes = Axes.Y,
+                                            Margin = new MarginPadding { Top = 20 },
+                                            Child = author = new AuthorInfo(),
+                                        },
+                                        new Container
+                                        {
+                                            RelativeSizeAxes = Axes.X,
+                                            Height = buttons_height,
+                                            Margin = new MarginPadding { Top = 10 },
+                                            Children = new Drawable[]
+                                            {
+                                                favouriteButton = new FavouriteButton(),
+                                                downloadButtonsContainer = new FillFlowContainer
+                                                {
+                                                    RelativeSizeAxes = Axes.Both,
+                                                    Padding = new MarginPadding { Left = buttons_height + buttons_spacing },
+                                                    Spacing = new Vector2(buttons_spacing),
+                                                },
                                             },
                                         },
                                     },
                                 },
-                            },
+                                loading = new LoadingAnimation
+                                {
+                                    Anchor = Anchor.Centre,
+                                    Origin = Anchor.Centre,
+                                }
+                            }
                         },
                         new FillFlowContainer
                         {
@@ -187,8 +197,11 @@ namespace osu.Game.Overlays.BeatmapSet
                 },
             };
 
-            Picker.Beatmap.ValueChanged += b => Details.Beatmap = b.NewValue;
+            Picker.Beatmap.ValueChanged += b =>
-            Picker.Beatmap.ValueChanged += b => externalLink.Link = $@"https://osu.ppy.sh/beatmapsets/{BeatmapSet.Value?.OnlineBeatmapSetID}#{b.NewValue?.Ruleset.ShortName}/{b.NewValue?.OnlineBeatmapID}";
+            {
+                Details.Beatmap = b.NewValue;
+                externalLink.Link = $@"https://osu.ppy.sh/beatmapsets/{BeatmapSet.Value?.OnlineBeatmapSetID}#{b.NewValue?.Ruleset.ShortName}/{b.NewValue?.OnlineBeatmapID}";
+            };
         }
 
         [BackgroundDependencyLoader]
@@ -201,24 +214,35 @@ namespace osu.Game.Overlays.BeatmapSet
             BeatmapSet.BindValueChanged(setInfo =>
             {
                 Picker.BeatmapSet = author.BeatmapSet = Details.BeatmapSet = setInfo.NewValue;
-
-                title.Text = setInfo.NewValue?.Metadata.Title ?? string.Empty;
-                artist.Text = setInfo.NewValue?.Metadata.Artist ?? string.Empty;
-                onlineStatusPill.Status = setInfo.NewValue?.OnlineInfo.Status ?? BeatmapSetOnlineStatus.None;
                 cover.BeatmapSet = setInfo.NewValue;
 
-                if (setInfo.NewValue != null)
+                if (setInfo.NewValue == null)
-                {
-                    downloadButtonsContainer.FadeIn(transition_duration);
-                    favouriteButton.FadeIn(transition_duration);
-                }
-                else
                 {
+                    onlineStatusPill.FadeTo(0.5f, 500, Easing.OutQuint);
+                    fadeContent.Hide();
+
+                    loading.Show();
+
                     downloadButtonsContainer.FadeOut(transition_duration);
                     favouriteButton.FadeOut(transition_duration);
                 }
+                else
+                {
+                    fadeContent.FadeIn(500, Easing.OutQuint);
 
-                updateDownloadButtons();
+                    loading.Hide();
+
+                    title.Text = setInfo.NewValue.Metadata.Title ?? string.Empty;
+                    artist.Text = setInfo.NewValue.Metadata.Artist ?? string.Empty;
+
+                    onlineStatusPill.FadeIn(500, Easing.OutQuint);
+                    onlineStatusPill.Status = setInfo.NewValue.OnlineInfo.Status;
+
+                    downloadButtonsContainer.FadeIn(transition_duration);
+                    favouriteButton.FadeIn(transition_duration);
+
+                    updateDownloadButtons();
+                }
             }, true);
         }
 

osu.Game/Overlays/BeatmapSet/Scores/TopScoreUserSection.cs

@@ -53,7 +53,7 @@ namespace osu.Game.Overlays.BeatmapSet.Scores
                         Size = new Vector2(40),
                         FillMode = FillMode.Fit,
                     },
-                    avatar = new UpdateableAvatar
+                    avatar = new UpdateableAvatar(hideImmediately: true)
                     {
                         Anchor = Anchor.Centre,
                         Origin = Anchor.Centre,
@@ -90,7 +90,7 @@ namespace osu.Game.Overlays.BeatmapSet.Scores
                                 Origin = Anchor.CentreLeft,
                                 Font = OsuFont.GetFont(size: 15, weight: FontWeight.Bold)
                             },
-                            flag = new UpdateableFlag
+                            flag = new UpdateableFlag(hideImmediately: true)
                             {
                                 Anchor = Anchor.CentreLeft,
                                 Origin = Anchor.CentreLeft,

osu.Game/Overlays/Settings/Sections/Audio/AudioDevicesSettings.cs

@@ -73,7 +73,7 @@ namespace osu.Game.Overlays.Settings.Sections.Audio
 
         private class AudioDeviceSettingsDropdown : SettingsDropdown<string>
         {
-            protected override OsuDropdown<string> CreateDropdown() => new AudioDeviceDropdownControl { Items = Items };
+            protected override OsuDropdown<string> CreateDropdown() => new AudioDeviceDropdownControl();
 
             private class AudioDeviceDropdownControl : DropdownControl
             {

osu.Game/Overlays/Settings/Sections/Graphics/LayoutSettings.cs

@@ -237,7 +237,7 @@ namespace osu.Game.Overlays.Settings.Sections.Graphics
 
         private class ResolutionSettingsDropdown : SettingsDropdown<Size>
         {
-            protected override OsuDropdown<Size> CreateDropdown() => new ResolutionDropdownControl { Items = Items };
+            protected override OsuDropdown<Size> CreateDropdown() => new ResolutionDropdownControl();
 
             private class ResolutionDropdownControl : DropdownControl
             {

osu.Game/Overlays/Settings/Sections/SkinSection.cs

@@ -108,7 +108,7 @@ namespace osu.Game.Overlays.Settings.Sections
 
         private class SkinSettingsDropdown : SettingsDropdown<SkinInfo>
         {
-            protected override OsuDropdown<SkinInfo> CreateDropdown() => new SkinDropdownControl { Items = Items };
+            protected override OsuDropdown<SkinInfo> CreateDropdown() => new SkinDropdownControl();
 
             private class SkinDropdownControl : DropdownControl
             {

osu.Game/Overlays/Settings/SettingsDropdown.cs

@@ -13,39 +13,23 @@ namespace osu.Game.Overlays.Settings
     {
         protected new OsuDropdown<T> Control => (OsuDropdown<T>)base.Control;
 
-        private IEnumerable<T> items = Enumerable.Empty<T>();
-
         public IEnumerable<T> Items
         {
-            get => items;
+            get => Control.Items;
-            set
+            set => Control.Items = value;
-            {
-                items = value;
-
-                if (Control != null)
-                    Control.Items = value;
-            }
         }
 
-        private IBindableList<T> itemSource;
-
         public IBindableList<T> ItemSource
         {
-            get => itemSource;
+            get => Control.ItemSource;
-            set
+            set => Control.ItemSource = value;
-            {
-                itemSource = value;
-
-                if (Control != null)
-                    Control.ItemSource = value;
-            }
         }
 
         public override IEnumerable<string> FilterTerms => base.FilterTerms.Concat(Control.Items.Select(i => i.ToString()));
 
         protected sealed override Drawable CreateControl() => CreateDropdown();
 
-        protected virtual OsuDropdown<T> CreateDropdown() => new DropdownControl { Items = Items, ItemSource = ItemSource };
+        protected virtual OsuDropdown<T> CreateDropdown() => new DropdownControl();
 
         protected class DropdownControl : OsuDropdown<T>
         {

osu.Game/Overlays/VolumeOverlay.cs

@@ -102,6 +102,10 @@ namespace osu.Game.Overlays
                 case GlobalAction.DecreaseVolume:
                     if (State.Value == Visibility.Hidden)
                         Show();
+                    else if (volumeMeterMusic.IsHovered)
+                        volumeMeterMusic.Decrease(amount, isPrecise);
+                    else if (volumeMeterEffect.IsHovered)
+                        volumeMeterEffect.Decrease(amount, isPrecise);
                     else
                         volumeMeterMaster.Decrease(amount, isPrecise);
                     return true;
@@ -109,6 +113,10 @@ namespace osu.Game.Overlays
                 case GlobalAction.IncreaseVolume:
                     if (State.Value == Visibility.Hidden)
                         Show();
+                    else if (volumeMeterMusic.IsHovered)
+                        volumeMeterMusic.Increase(amount, isPrecise);
+                    else if (volumeMeterEffect.IsHovered)
+                        volumeMeterEffect.Increase(amount, isPrecise);
                     else
                         volumeMeterMaster.Increase(amount, isPrecise);
                     return true;

osu.Game/Screens/Edit/Editor.cs

@@ -32,6 +32,8 @@ namespace osu.Game.Screens.Edit
     {
         protected override BackgroundScreen CreateBackground() => new BackgroundScreenCustom(@"Backgrounds/bg4");
 
+        public override bool AllowBackButton => false;
+
         public override bool HideOverlaysOnEnter => true;
 
         public override bool DisallowExternalBeatmapRulesetChanges => true;

osu.Game/Screens/IOsuScreen.cs

@@ -17,6 +17,11 @@ namespace osu.Game.Screens
         /// </summary>
         bool DisallowExternalBeatmapRulesetChanges { get; }
 
+        /// <summary>
+        /// Whether the user can exit this this <see cref="IOsuScreen"/> by pressing the back button.
+        /// </summary>
+        bool AllowBackButton { get; }
+
         /// <summary>
         /// Whether a top-level component should be allowed to exit the current screen to, for example,
         /// complete an import. Note that this can be overridden by a user if they specifically request.

osu.Game/Screens/Loader.cs

@@ -23,7 +23,7 @@ namespace osu.Game.Screens
 
         public override bool CursorVisible => false;
 
-        protected override bool AllowBackButton => false;
+        public override bool AllowBackButton => false;
 
         public Loader()
         {

osu.Game/Screens/Menu/Intro.cs

@@ -32,6 +32,8 @@ namespace osu.Game.Screens.Menu
         private SampleChannel welcome;
         private SampleChannel seeya;
 
+        public override bool AllowBackButton => false;
+
         public override bool HideOverlaysOnEnter => true;
         public override OverlayActivation InitialOverlayActivationMode => OverlayActivation.Disabled;
 

osu.Game/Screens/Menu/MainMenu.cs

@@ -27,7 +27,7 @@ namespace osu.Game.Screens.Menu
 
         public override bool HideOverlaysOnEnter => buttons == null || buttons.State == ButtonSystemState.Initial;
 
-        protected override bool AllowBackButton => buttons.State != ButtonSystemState.Initial && host.CanExit;
+        public override bool AllowBackButton => false;
 
         public override bool AllowExternalScreenChange => true;
 

osu.Game/Screens/Multi/Multiplayer.cs

@@ -212,6 +212,12 @@ namespace osu.Game.Screens.Multi
 
         public override bool OnExiting(IScreen next)
         {
+            if (!(screenStack.CurrentScreen is LoungeSubScreen))
+            {
+                screenStack.Exit();
+                return true;
+            }
+
             waves.Hide();
 
             this.Delay(WaveContainer.DISAPPEAR_DURATION).FadeOut();

osu.Game/Screens/OsuScreen.cs

@@ -8,10 +8,8 @@ using osu.Framework.Audio;
 using osu.Framework.Audio.Sample;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
-using osu.Framework.Input.Bindings;
 using osu.Framework.Screens;
 using osu.Game.Beatmaps;
-using osu.Game.Input.Bindings;
 using osu.Game.Rulesets;
 using osu.Game.Screens.Menu;
 using osu.Game.Overlays;
@@ -21,7 +19,7 @@ using osu.Game.Rulesets.Mods;
 
 namespace osu.Game.Screens
 {
-    public abstract class OsuScreen : Screen, IOsuScreen, IKeyBindingHandler<GlobalAction>, IHasDescription
+    public abstract class OsuScreen : Screen, IOsuScreen, IHasDescription
     {
         /// <summary>
         /// The amount of negative padding that should be applied to game background content which touches both the left and right sides of the screen.
@@ -36,7 +34,7 @@ namespace osu.Game.Screens
 
         public string Description => Title;
 
-        protected virtual bool AllowBackButton => true;
+        public virtual bool AllowBackButton => true;
 
         public virtual bool AllowExternalScreenChange => false;
 
@@ -131,21 +129,6 @@ namespace osu.Game.Screens
             sampleExit = audio.Samples.Get(@"UI/screen-back");
         }
 
-        public virtual bool OnPressed(GlobalAction action)
-        {
-            if (!this.IsCurrentScreen()) return false;
-
-            if (action == GlobalAction.Back && AllowBackButton)
-            {
-                this.Exit();
-                return true;
-            }
-
-            return false;
-        }
-
-        public bool OnReleased(GlobalAction action) => action == GlobalAction.Back && AllowBackButton;
-
         public override void OnResuming(IScreen last)
         {
             if (PlayResumeSound)

osu.Game/Screens/Play/HotkeyExitOverlay.cs

@@ -0,0 +1,28 @@
+// 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.Input.Bindings;
+using osu.Game.Input.Bindings;
+using osu.Game.Overlays;
+
+namespace osu.Game.Screens.Play
+{
+    public class HotkeyExitOverlay : HoldToConfirmOverlay, IKeyBindingHandler<GlobalAction>
+    {
+        public bool OnPressed(GlobalAction action)
+        {
+            if (action != GlobalAction.QuickExit) return false;
+
+            BeginConfirm();
+            return true;
+        }
+
+        public bool OnReleased(GlobalAction action)
+        {
+            if (action != GlobalAction.QuickExit) return false;
+
+            AbortConfirm();
+            return true;
+        }
+    }
+}

osu.Game/Screens/Play/Player.cs

@@ -33,7 +33,7 @@ namespace osu.Game.Screens.Play
 {
     public class Player : ScreenWithBeatmapBackground
     {
-        protected override bool AllowBackButton => false; // handled by HoldForMenuButton
+        public override bool AllowBackButton => false; // handled by HoldForMenuButton
 
         protected override UserActivity InitialActivity => new UserActivity.SoloGame(Beatmap.Value.BeatmapInfo, Ruleset.Value);
 
@@ -177,6 +177,16 @@ namespace osu.Game.Screens.Play
                         Restart();
                     },
                 },
+                new HotkeyExitOverlay
+                {
+                    Action = () =>
+                    {
+                        if (!this.IsCurrentScreen()) return;
+
+                        fadeOut(true);
+                        performUserRequestedExit();
+                    },
+                },
                 failAnimation = new FailAnimation(DrawableRuleset) { OnComplete = onFailComplete, }
             };
 
@@ -245,6 +255,11 @@ namespace osu.Game.Screens.Play
         {
             if (!this.IsCurrentScreen()) return;
 
+            // if a restart has been requested, cancel any pending completion (user has shown intent to restart).
+            onCompletionEvent = null;
+
+            ValidForResume = false;
+
             this.Exit();
         }
 

osu.Game/Screens/Play/PlayerLoader.cs

@@ -247,6 +247,7 @@ namespace osu.Game.Screens.Play
 
         public override void OnSuspending(IScreen next)
         {
+            BackgroundBrightnessReduction = false;
             base.OnSuspending(next);
             cancelLoad();
         }
@@ -258,6 +259,7 @@ namespace osu.Game.Screens.Play
             cancelLoad();
 
             Background.EnableUserDim.Value = false;
+            BackgroundBrightnessReduction = false;
 
             return base.OnExiting(next);
         }
@@ -273,6 +275,22 @@ namespace osu.Game.Screens.Play
             }
         }
 
+        private bool backgroundBrightnessReduction;
+
+        protected bool BackgroundBrightnessReduction
+        {
+            get => backgroundBrightnessReduction;
+            set
+            {
+                if (value == backgroundBrightnessReduction)
+                    return;
+
+                backgroundBrightnessReduction = value;
+
+                Background.FadeColour(OsuColour.Gray(backgroundBrightnessReduction ? 0.8f : 1), 200);
+            }
+        }
+
         protected override void Update()
         {
             base.Update();
@@ -287,12 +305,16 @@ namespace osu.Game.Screens.Play
                 // Preview user-defined background dim and blur when hovered on the visual settings panel.
                 Background.EnableUserDim.Value = true;
                 Background.BlurAmount.Value = 0;
+
+                BackgroundBrightnessReduction = false;
             }
             else
             {
                 // Returns background dim and blur to the values specified by PlayerLoader.
                 Background.EnableUserDim.Value = false;
                 Background.BlurAmount.Value = BACKGROUND_BLUR;
+
+                BackgroundBrightnessReduction = true;
             }
         }
 

osu.Game/Screens/Ranking/Results.cs

@@ -16,7 +16,6 @@ using osu.Game.Screens.Backgrounds;
 using osuTK;
 using osuTK.Graphics;
 using osu.Game.Graphics;
-using osu.Game.Graphics.UserInterface;
 using osu.Framework.Graphics.Shapes;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Scoring;
@@ -254,13 +253,7 @@ namespace osu.Game.Screens.Ranking
                             }
                         }
                     }
-                },
+                }
-                new BackButton
-                {
-                    Anchor = Anchor.BottomLeft,
-                    Origin = Anchor.BottomLeft,
-                    Action = this.Exit
-                },
             };
 
             foreach (var t in CreateResultPages())

osu.Game/Screens/ScreenWhiteBox.cs

@@ -20,8 +20,6 @@ namespace osu.Game.Screens
 {
     public class ScreenWhiteBox : OsuScreen
     {
-        private readonly BackButton popButton;
-
         private const double transition_time = 1000;
 
         protected virtual IEnumerable<Type> PossibleChildren => null;
@@ -35,10 +33,6 @@ namespace osu.Game.Screens
         {
             base.OnEntering(last);
 
-            //only show the pop button if we are entered form another screen.
-            if (last != null)
-                popButton.Alpha = 1;
-
             Alpha = 0;
             textContainer.Position = new Vector2(DrawSize.X / 16, 0);
 
@@ -144,13 +138,6 @@ namespace osu.Game.Screens
                         },
                     }
                 },
-                popButton = new BackButton
-                {
-                    Anchor = Anchor.BottomLeft,
-                    Origin = Anchor.BottomLeft,
-                    Alpha = 0,
-                    Action = this.Exit
-                },
                 childModeButtons = new FillFlowContainer
                 {
                     Direction = FillDirection.Vertical,

osu.Game/Screens/Select/Footer.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;
 using System.Collections.Generic;
 using System.Linq;
 using osuTK;
@@ -25,8 +24,6 @@ namespace osu.Game.Screens.Select
 
         private const float padding = 80;
 
-        public Action OnBack;
-
         private readonly FillFlowContainer<FooterButton> buttons;
 
         private readonly List<OverlayContainer> overlays = new List<OverlayContainer>();
@@ -83,12 +80,6 @@ namespace osu.Game.Screens.Select
                     Height = 3,
                     Position = new Vector2(0, -3),
                 },
-                new BackButton
-                {
-                    Anchor = Anchor.BottomLeft,
-                    Origin = Anchor.BottomLeft,
-                    Action = () => OnBack?.Invoke()
-                },
                 new FillFlowContainer
                 {
                     Anchor = Anchor.BottomLeft,

osu.Game/Screens/Select/SongSelect.cs

@@ -34,10 +34,11 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Input.Bindings;
 
 namespace osu.Game.Screens.Select
 {
-    public abstract class SongSelect : OsuScreen
+    public abstract class SongSelect : OsuScreen, IKeyBindingHandler<GlobalAction>
     {
         private static readonly Vector2 wedged_container_size = new Vector2(0.5f, 245);
 
@@ -186,31 +187,27 @@ namespace osu.Game.Screens.Select
 
             if (ShowFooter)
             {
-                AddInternal(FooterPanels = new Container
+                AddRangeInternal(new[]
                 {
-                    Anchor = Anchor.BottomLeft,
+                    FooterPanels = new Container
-                    Origin = Anchor.BottomLeft,
-                    RelativeSizeAxes = Axes.X,
-                    AutoSizeAxes = Axes.Y,
-                    Margin = new MarginPadding
-                    {
-                        Bottom = Footer.HEIGHT,
-                    },
-                });
-                AddInternal(Footer = new Footer
-                {
-                    OnBack = ExitFromBack,
-                });
-
-                FooterPanels.AddRange(new Drawable[]
-                {
-                    BeatmapOptions = new BeatmapOptionsOverlay(),
-                    ModSelect = new ModSelectOverlay
                     {
+                        Anchor = Anchor.BottomLeft,
+                        Origin = Anchor.BottomLeft,
                         RelativeSizeAxes = Axes.X,
-                        Origin = Anchor.BottomCentre,
+                        AutoSizeAxes = Axes.Y,
-                        Anchor = Anchor.BottomCentre,
+                        Margin = new MarginPadding { Bottom = Footer.HEIGHT },
-                    }
+                        Children = new Drawable[]
+                        {
+                            BeatmapOptions = new BeatmapOptionsOverlay(),
+                            ModSelect = new ModSelectOverlay
+                            {
+                                RelativeSizeAxes = Axes.X,
+                                Origin = Anchor.BottomCentre,
+                                Anchor = Anchor.BottomCentre,
+                            }
+                        }
+                    },
+                    Footer = new Footer()
                 });
             }
 
@@ -277,17 +274,6 @@ namespace osu.Game.Screens.Select
             return dependencies;
         }
 
-        protected virtual void ExitFromBack()
-        {
-            if (ModSelect.State.Value == Visibility.Visible)
-            {
-                ModSelect.Hide();
-                return;
-            }
-
-            this.Exit();
-        }
-
         public void Edit(BeatmapInfo beatmap = null)
         {
             Beatmap.Value = beatmaps.GetWorkingBeatmap(beatmap ?? beatmapNoDebounce);
@@ -518,6 +504,12 @@ namespace osu.Game.Screens.Select
 
         public override bool OnExiting(IScreen next)
         {
+            if (ModSelect.State.Value == Visibility.Visible)
+            {
+                ModSelect.Hide();
+                return true;
+            }
+
             if (base.OnExiting(next))
                 return true;
 
@@ -649,7 +641,7 @@ namespace osu.Game.Screens.Select
                 Schedule(() => BeatmapDetails.Leaderboard.RefreshScores())));
         }
 
-        public override bool OnPressed(GlobalAction action)
+        public virtual bool OnPressed(GlobalAction action)
         {
             if (!this.IsCurrentScreen()) return false;
 
@@ -660,9 +652,11 @@ namespace osu.Game.Screens.Select
                     return true;
             }
 
-            return base.OnPressed(action);
+            return false;
         }
 
+        public bool OnReleased(GlobalAction action) => action == GlobalAction.Select;
+
         protected override bool OnKeyDown(KeyDownEvent e)
         {
             if (e.Repeat) return false;

osu.Game/Users/Drawables/UpdateableAvatar.cs

@@ -5,6 +5,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Effects;
+using osu.Framework.Graphics.Transforms;
 
 namespace osu.Game.Users.Drawables
 {
@@ -37,6 +38,8 @@ namespace osu.Game.Users.Drawables
             set => base.EdgeEffect = value;
         }
 
+        protected override bool TransformImmediately { get; }
+
         /// <summary>
         /// Whether to show a default guest representation on null user (as opposed to nothing).
         /// </summary>
@@ -47,11 +50,14 @@ namespace osu.Game.Users.Drawables
         /// </summary>
         public readonly BindableBool OpenOnClick = new BindableBool(true);
 
-        public UpdateableAvatar(User user = null)
+        public UpdateableAvatar(User user = null, bool hideImmediately = false)
         {
+            TransformImmediately = hideImmediately;
             User = user;
         }
 
+        protected override TransformSequence<Drawable> ApplyHideTransforms(Drawable drawable) => TransformImmediately ? drawable?.FadeOut() : base.ApplyHideTransforms(drawable);
+
         protected override Drawable CreateDrawable(User user)
         {
             if (user == null && !ShowGuestOnNull)

osu.Game/Users/Drawables/UpdateableFlag.cs

@@ -3,6 +3,7 @@
 
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Transforms;
 
 namespace osu.Game.Users.Drawables
 {
@@ -14,16 +15,21 @@ namespace osu.Game.Users.Drawables
             set => Model = value;
         }
 
+        protected override bool TransformImmediately { get; }
+
         /// <summary>
         /// Whether to show a place holder on null country.
         /// </summary>
         public bool ShowPlaceholderOnNull = true;
 
-        public UpdateableFlag(Country country = null)
+        public UpdateableFlag(Country country = null, bool hideImmediately = false)
         {
+            TransformImmediately = hideImmediately;
             Country = country;
         }
 
+        protected override TransformSequence<Drawable> ApplyHideTransforms(Drawable drawable) => TransformImmediately ? drawable?.FadeOut() : base.ApplyHideTransforms(drawable);
+
         protected override Drawable CreateDrawable(Country country)
         {
             if (country == null && !ShowPlaceholderOnNull)

osu.Game/osu.Game.csproj

@@ -15,7 +15,7 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite.Core" Version="2.2.4" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
     <PackageReference Include="ppy.osu.Game.Resources" Version="2019.609.0" />
-    <PackageReference Include="ppy.osu.Framework" Version="2019.621.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2019.625.0" />
     <PackageReference Include="SharpCompress" Version="0.23.0" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="SharpRaven" Version="2.4.0" />

osu.iOS.props

@@ -105,8 +105,8 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite.Core" Version="2.2.1" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
     <PackageReference Include="ppy.osu.Game.Resources" Version="2019.609.0" />
-    <PackageReference Include="ppy.osu.Framework" Version="2019.621.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2019.625.0" />
-    <PackageReference Include="ppy.osu.Framework.iOS" Version="2019.621.0" />
+    <PackageReference Include="ppy.osu.Framework.iOS" Version="2019.625.0" />
     <PackageReference Include="SharpCompress" Version="0.22.0" />
     <PackageReference Include="NUnit" Version="3.11.0" />
     <PackageReference Include="SharpRaven" Version="2.4.0" />