Move absolute scroll support local to carousel and allow custom bindings

osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapCarouselV2.cs

@@ -38,7 +38,7 @@ namespace osu.Game.Tests.Visual.SongSelect
         private OsuTextFlowContainer stats = null!;
         private BeatmapCarousel carousel = null!;
 
-        private OsuScrollContainer scroll => carousel.ChildrenOfType<OsuScrollContainer>().Single();
+        private OsuScrollContainer<Drawable> scroll => carousel.ChildrenOfType<OsuScrollContainer<Drawable>>().Single();
 
         private int beatmapCount;
 

osu.Game/Graphics/Containers/OsuScrollContainer.cs

@@ -26,26 +26,12 @@ namespace osu.Game.Graphics.Containers
         }
     }
 
-    public partial class OsuScrollContainer<T> : ScrollContainer<T> where T : Drawable
+    public partial class OsuScrollContainer<T> : ScrollContainer<T>
+        where T : Drawable
     {
         public const float SCROLL_BAR_WIDTH = 10;
         public const float SCROLL_BAR_PADDING = 3;
 
-        /// <summary>
-        /// Allows controlling the scroll bar from any position in the container using the right mouse button.
-        /// Uses the value of <see cref="DistanceDecayOnRightMouseScrollbar"/> to smoothly scroll to the dragged location.
-        /// </summary>
-        public bool RightMouseScrollbar;
-
-        /// <summary>
-        /// Controls the rate with which the target position is approached when performing a relative drag. Default is 0.02.
-        /// </summary>
-        public double DistanceDecayOnRightMouseScrollbar = 0.02;
-
-        private bool rightMouseDragging;
-
-        protected override bool IsDragging => base.IsDragging || rightMouseDragging;
-
         public OsuScrollContainer(Direction scrollDirection = Direction.Vertical)
             : base(scrollDirection)
         {
@@ -71,50 +57,6 @@ namespace osu.Game.Graphics.Containers
                 ScrollTo(maxPos - DisplayableContent + extraScroll, animated);
         }
 
-        protected override bool OnMouseDown(MouseDownEvent e)
-        {
-            if (shouldPerformRightMouseScroll(e))
-            {
-                ScrollFromMouseEvent(e);
-                return true;
-            }
-
-            return base.OnMouseDown(e);
-        }
-
-        protected override void OnDrag(DragEvent e)
-        {
-            if (rightMouseDragging)
-            {
-                ScrollFromMouseEvent(e);
-                return;
-            }
-
-            base.OnDrag(e);
-        }
-
-        protected override bool OnDragStart(DragStartEvent e)
-        {
-            if (shouldPerformRightMouseScroll(e))
-            {
-                rightMouseDragging = true;
-                return true;
-            }
-
-            return base.OnDragStart(e);
-        }
-
-        protected override void OnDragEnd(DragEndEvent e)
-        {
-            if (rightMouseDragging)
-            {
-                rightMouseDragging = false;
-                return;
-            }
-
-            base.OnDragEnd(e);
-        }
-
         protected override bool OnScroll(ScrollEvent e)
         {
             // allow for controlling volume when alt is held.
@@ -124,15 +66,22 @@ namespace osu.Game.Graphics.Containers
             return base.OnScroll(e);
         }
 
-        protected virtual void ScrollFromMouseEvent(MouseEvent e)
+        #region Absolute scrolling
+
+        /// <summary>
+        /// Controls the rate with which the target position is approached when performing a relative drag. Default is 0.02.
+        /// </summary>
+        public double DistanceDecayOnAbsoluteScroll = 0.02;
+
+        protected virtual void ScrollToAbsolutePosition(Vector2 screenSpacePosition)
         {
-            float fromScrollbarPosition = FromScrollbarPosition(ToLocalSpace(e.ScreenSpaceMousePosition)[ScrollDim]);
+            float fromScrollbarPosition = FromScrollbarPosition(ToLocalSpace(screenSpacePosition)[ScrollDim]);
             float scrollbarCentreOffset = FromScrollbarPosition(Scrollbar.DrawHeight) * 0.5f;
 
-            ScrollTo(Clamp(fromScrollbarPosition - scrollbarCentreOffset), true, DistanceDecayOnRightMouseScrollbar);
+            ScrollTo(Clamp(fromScrollbarPosition - scrollbarCentreOffset), true, DistanceDecayOnAbsoluteScroll);
         }
 
-        private bool shouldPerformRightMouseScroll(MouseButtonEvent e) => RightMouseScrollbar && e.Button == MouseButton.Right;
+        #endregion
 
         protected override ScrollbarContainer CreateScrollbar(Direction direction) => new OsuScrollbar(direction);
 

osu.Game/Graphics/Containers/UserTrackingScrollContainer.cs

@@ -2,7 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Graphics;
-using osu.Framework.Input.Events;
+using osuTK;
 
 namespace osu.Game.Graphics.Containers
 {
@@ -47,10 +47,10 @@ namespace osu.Game.Graphics.Containers
             base.ScrollIntoView(target, animated);
         }
 
-        protected override void ScrollFromMouseEvent(MouseEvent e)
+        protected override void ScrollToAbsolutePosition(Vector2 screenSpacePosition)
         {
             UserScrolling = true;
-            base.ScrollFromMouseEvent(e);
+            base.ScrollToAbsolutePosition(screenSpacePosition);
         }
 
         public new void ScrollTo(double value, bool animated = true, double? distanceDecay = null)

osu.Game/Input/Bindings/GlobalActionContainer.cs

@@ -204,6 +204,7 @@ namespace osu.Game.Input.Bindings
             new KeyBinding(InputKey.BackSpace, GlobalAction.DeselectAllMods),
             new KeyBinding(new[] { InputKey.Control, InputKey.Up }, GlobalAction.IncreaseModSpeed),
             new KeyBinding(new[] { InputKey.Control, InputKey.Down }, GlobalAction.DecreaseModSpeed),
+            new KeyBinding(new[] { InputKey.MouseRight }, GlobalAction.AbsoluteScrollSongList),
         };
 
         private static IEnumerable<KeyBinding> audioControlKeyBindings => new[]
@@ -490,6 +491,9 @@ namespace osu.Game.Input.Bindings
 
         [LocalisableDescription(typeof(GlobalActionKeyBindingStrings), nameof(GlobalActionKeyBindingStrings.EditorSeekToNextBookmark))]
         EditorSeekToNextBookmark,
+
+        [LocalisableDescription(typeof(GlobalActionKeyBindingStrings), nameof(GlobalActionKeyBindingStrings.AbsoluteScrollSongList))]
+        AbsoluteScrollSongList
     }
 
     public enum GlobalActionCategory

osu.Game/Localisation/GlobalActionKeyBindingStrings.cs

@@ -449,6 +449,11 @@ namespace osu.Game.Localisation
         /// </summary>
         public static LocalisableString EditorSeekToNextBookmark => new TranslatableString(getKey(@"editor_seek_to_next_bookmark"), @"Seek to next bookmark");
 
+        /// <summary>
+        /// "Absolute scroll song list"
+        /// </summary>
+        public static LocalisableString AbsoluteScrollSongList => new TranslatableString(getKey(@"absolute_scroll_song_list"), @"Absolute scroll song list");
+
         private static string getKey(string key) => $@"{prefix}:{key}";
     }
 }

osu.Game/Screens/Select/BeatmapCarousel.cs

@@ -14,6 +14,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Caching;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Pooling;
 using osu.Framework.Input.Bindings;
 using osu.Framework.Input.Events;
@@ -208,7 +209,6 @@ namespace osu.Game.Screens.Select
                     setPool,
                     Scroll = new CarouselScrollContainer
                     {
-                        RightMouseScrollbar = true,
                         RelativeSizeAxes = Axes.Both,
                     },
                     noResultsPlaceholder = new NoResultsPlaceholder()
@@ -1157,10 +1157,8 @@ namespace osu.Game.Screens.Select
             }
         }
 
-        public partial class CarouselScrollContainer : UserTrackingScrollContainer<DrawableCarouselItem>
+        public partial class CarouselScrollContainer : UserTrackingScrollContainer<DrawableCarouselItem>, IKeyBindingHandler<GlobalAction>
         {
-            private bool rightMouseScrollBlocked;
-
             public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => true;
 
             public CarouselScrollContainer()
@@ -1172,31 +1170,54 @@ namespace osu.Game.Screens.Select
                 Masking = false;
             }
 
-            protected override bool OnMouseDown(MouseDownEvent e)
+            #region Absolute scrolling
-            {
-                if (e.Button == MouseButton.Right)
-                {
-                    // we need to block right click absolute scrolling when hovering a carousel item so context menus can display.
-                    // this can be reconsidered when we have an alternative to right click scrolling.
-                    if (GetContainingInputManager()!.HoveredDrawables.OfType<DrawableCarouselItem>().Any())
-                    {
-                        rightMouseScrollBlocked = true;
-                        return false;
-                    }
-                }
 
-                rightMouseScrollBlocked = false;
+            private bool absoluteScrolling;
-                return base.OnMouseDown(e);
-            }
 
-            protected override bool OnDragStart(DragStartEvent e)
+            protected override bool IsDragging => base.IsDragging || absoluteScrolling;
+
+            public bool OnPressed(KeyBindingPressEvent<GlobalAction> e)
             {
-                if (rightMouseScrollBlocked)
+                switch (e.Action)
+                {
+                    case GlobalAction.AbsoluteScrollSongList:
+                        // The default binding for absolute scroll is right mouse button.
+                        // To avoid conflicts with context menus, disallow absolute scroll completely if it looks like things will fall over.
+                        if (e.CurrentState.Mouse.Buttons.Contains(MouseButton.Right)
+                            && GetContainingInputManager()!.HoveredDrawables.OfType<IHasContextMenu>().Any())
                             return false;
 
-                return base.OnDragStart(e);
+                        ScrollToAbsolutePosition(e.CurrentState.Mouse.Position);
+                        absoluteScrolling = true;
+                        return true;
                 }
 
+                return false;
+            }
+
+            public void OnReleased(KeyBindingReleaseEvent<GlobalAction> e)
+            {
+                switch (e.Action)
+                {
+                    case GlobalAction.AbsoluteScrollSongList:
+                        absoluteScrolling = false;
+                        break;
+                }
+            }
+
+            protected override bool OnMouseMove(MouseMoveEvent e)
+            {
+                if (absoluteScrolling)
+                {
+                    ScrollToAbsolutePosition(e.CurrentState.Mouse.Position);
+                    return true;
+                }
+
+                return base.OnMouseMove(e);
+            }
+
+            #endregion
+
             protected override ScrollbarContainer CreateScrollbar(Direction direction)
             {
                 return new PaddedScrollbar();

osu.Game/Screens/SelectV2/Carousel.cs

@@ -11,13 +11,18 @@ using osu.Framework.Bindables;
 using osu.Framework.Extensions.TypeExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Pooling;
 using osu.Framework.Graphics.Shapes;
+using osu.Framework.Input.Bindings;
+using osu.Framework.Input.Events;
 using osu.Framework.Logging;
 using osu.Framework.Utils;
 using osu.Game.Graphics.Containers;
+using osu.Game.Input.Bindings;
 using osuTK;
 using osuTK.Graphics;
+using osuTK.Input;
 
 namespace osu.Game.Screens.SelectV2
 {
@@ -121,7 +126,6 @@ namespace osu.Game.Screens.SelectV2
                 },
                 scroll = new CarouselScrollContainer
                 {
-                    RightMouseScrollbar = true,
                     RelativeSizeAxes = Axes.Both,
                     Masking = false,
                 }
@@ -391,7 +395,7 @@ namespace osu.Game.Screens.SelectV2
         /// Implementation of scroll container which handles very large vertical lists by internally using <c>double</c> precision
         /// for pre-display Y values.
         /// </summary>
-        private partial class CarouselScrollContainer : UserTrackingScrollContainer
+        private partial class CarouselScrollContainer : UserTrackingScrollContainer, IKeyBindingHandler<GlobalAction>
         {
             public readonly Container Panels;
 
@@ -466,6 +470,55 @@ namespace osu.Game.Screens.SelectV2
                 foreach (var d in Panels)
                     d.Y = (float)(((ICarouselPanel)d).DrawYPosition + scrollableExtent);
             }
+
+            #region Absolute scrolling
+
+            private bool absoluteScrolling;
+
+            protected override bool IsDragging => base.IsDragging || absoluteScrolling;
+
+            public bool OnPressed(KeyBindingPressEvent<GlobalAction> e)
+            {
+                switch (e.Action)
+                {
+                    case GlobalAction.AbsoluteScrollSongList:
+
+                        // The default binding for absolute scroll is right mouse button.
+                        // To avoid conflicts with context menus, disallow absolute scroll completely if it looks like things will fall over.
+                        if (e.CurrentState.Mouse.Buttons.Contains(MouseButton.Right)
+                            && GetContainingInputManager()!.HoveredDrawables.OfType<IHasContextMenu>().Any())
+                            return false;
+
+                        ScrollToAbsolutePosition(e.CurrentState.Mouse.Position);
+                        absoluteScrolling = true;
+                        return true;
+                }
+
+                return false;
+            }
+
+            public void OnReleased(KeyBindingReleaseEvent<GlobalAction> e)
+            {
+                switch (e.Action)
+                {
+                    case GlobalAction.AbsoluteScrollSongList:
+                        absoluteScrolling = false;
+                        break;
+                }
+            }
+
+            protected override bool OnMouseMove(MouseMoveEvent e)
+            {
+                if (absoluteScrolling)
+                {
+                    ScrollToAbsolutePosition(e.CurrentState.Mouse.Position);
+                    return true;
+                }
+
+                return base.OnMouseMove(e);
+            }
+
+            #endregion
         }
 
         private class BoundsCarouselItem : CarouselItem