Fix blueprints behaving incorrectly

osu.Game.Rulesets.Mania/Edit/Blueprints/HoldNotePlacementBlueprint.cs

@@ -6,7 +6,6 @@ using osu.Framework.Graphics;
 using osu.Framework.Input.Events;
 using osu.Game.Rulesets.Mania.Edit.Blueprints.Components;
 using osu.Game.Rulesets.Mania.Objects;
-using osu.Game.Rulesets.Mania.UI;
 using osuTK;
 
 namespace osu.Game.Rulesets.Mania.Edit.Blueprints
@@ -17,8 +16,6 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
         private readonly EditNotePiece headPiece;
         private readonly EditNotePiece tailPiece;
 
-        private PlacementState state;
-
         public HoldNotePlacementBlueprint()
             : base(new HoldNote())
         {
@@ -36,15 +33,10 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
         {
             base.Update();
 
-            switch (state)
+            if (Column != null)
             {
-                case PlacementState.Start:
+                headPiece.Y = PositionAt(HitObject.StartTime);
-                    headPiece.Position = tailPiece.Position = SnappedMousePosition;
+                tailPiece.Y = PositionAt(HitObject.EndTime);
-                    headPiece.Width = tailPiece.Width = SnappedWidth;
-                    break;
-                case PlacementState.End:
-                    tailPiece.Position = new Vector2(headPiece.Position.X, SnappedMousePosition.Y);
-                    break;
             }
 
             var topPosition = new Vector2(headPiece.DrawPosition.X, Math.Min(headPiece.DrawPosition.Y, tailPiece.DrawPosition.Y));
@@ -55,42 +47,28 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
             bodyPiece.Height = (bottomPosition - topPosition).Y;
         }
 
-        protected override bool OnMouseDown(MouseDownEvent e)
+        private double originalStartTime;
+
+        protected override bool OnMouseMove(MouseMoveEvent e)
         {
-            Column column;
+            base.OnMouseMove(e);
-            if ((column = ColumnAt(e.ScreenSpaceMousePosition)) == null)
-                return base.OnMouseDown(e);
 
-            HitObject.StartTime = TimeAt(e.ScreenSpaceMousePosition);
+            if (PlacementBegun)
-            HitObject.Column = column.Index;
-
-            BeginPlacement();
-
-            state = PlacementState.End;
-
-            return true;
-        }
-
-        protected override bool OnMouseUp(MouseUpEvent e)
-        {
-            var endTime = TimeAt(e.ScreenSpaceMousePosition);
-            if (endTime < HitObject.StartTime)
             {
-                var tmp = endTime;
+                var endTime = TimeAt(e.ScreenSpaceMousePosition);
-                endTime = HitObject.StartTime;
+
-                HitObject.StartTime = tmp;
+                HitObject.StartTime = endTime < originalStartTime ? endTime : originalStartTime;
+                HitObject.Duration = Math.Abs(endTime - originalStartTime);
+            }
+            else
+            {
+                headPiece.Width = tailPiece.Width = SnappedWidth;
+                headPiece.X = tailPiece.X = SnappedMousePosition.X;
+
+                originalStartTime = HitObject.StartTime = TimeAt(e.ScreenSpaceMousePosition);
             }
 
-            HitObject.Duration = endTime - HitObject.StartTime;
-
-            EndPlacement();
             return true;
         }
-
-        private enum PlacementState
-        {
-            Start,
-            End
-        }
     }
 }

osu.Game.Rulesets.Mania/Edit/Blueprints/ManiaPlacementBlueprint.cs

@@ -3,6 +3,7 @@
 
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
+using osu.Framework.Input;
 using osu.Framework.Input.Events;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Objects;
@@ -13,11 +14,14 @@ using osuTK;
 
 namespace osu.Game.Rulesets.Mania.Edit.Blueprints
 {
-    public abstract class ManiaPlacementBlueprint<T> : PlacementBlueprint
+    public abstract class ManiaPlacementBlueprint<T> : PlacementBlueprint,
+                                                       IRequireHighFrequencyMousePosition // the playfield could be moving behind us
         where T : ManiaHitObject
     {
         protected new T HitObject => (T)base.HitObject;
 
+        protected Column Column;
+
         /// <summary>
         /// The current mouse position, snapped to the closest column.
         /// </summary>
@@ -40,31 +44,49 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
             RelativeSizeAxes = Axes.None;
         }
 
+        protected override bool OnMouseDown(MouseDownEvent e)
+        {
+            if (Column == null)
+                return base.OnMouseDown(e);
+
+            HitObject.StartTime = TimeAt(e.ScreenSpaceMousePosition);
+            HitObject.Column = Column.Index;
+
+            BeginPlacement();
+            return true;
+        }
+
+        protected override bool OnMouseUp(MouseUpEvent e)
+        {
+            EndPlacement();
+            return base.OnMouseUp(e);
+        }
+
         protected override bool OnMouseMove(MouseMoveEvent e)
         {
-            Column column = ColumnAt(e.ScreenSpaceMousePosition);
+            if (!PlacementBegun)
+                Column = ColumnAt(e.ScreenSpaceMousePosition);
 
-            if (column == null) return false;
+            if (Column == null) return false;
 
-            SnappedWidth = column.DrawWidth;
+            SnappedWidth = Column.DrawWidth;
 
             // Snap to the column
-            var parentPos = Parent.ToLocalSpace(column.ToScreenSpace(new Vector2(column.DrawWidth / 2, 0)));
+            var parentPos = Parent.ToLocalSpace(Column.ToScreenSpace(new Vector2(Column.DrawWidth / 2, 0)));
             SnappedMousePosition = new Vector2(parentPos.X, e.MousePosition.Y);
             return true;
         }
 
         protected double TimeAt(Vector2 screenSpacePosition)
         {
-            var column = ColumnAt(screenSpacePosition);
+            if (Column == null)
-            if (column == null)
                 return 0;
 
-            var hitObjectContainer = column.HitObjectContainer;
+            var hitObjectContainer = Column.HitObjectContainer;
 
             // If we're scrolling downwards, a position of 0 is actually further away from the hit target
             // so we need to flip the vertical coordinate in the hitobject container's space
-            var hitObjectPos = column.HitObjectContainer.ToLocalSpace(applyPositionOffset(screenSpacePosition)).Y;
+            var hitObjectPos = Column.HitObjectContainer.ToLocalSpace(applyPositionOffset(screenSpacePosition, false)).Y;
             if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
                 hitObjectPos = hitObjectContainer.DrawHeight - hitObjectPos;
 
@@ -74,21 +96,22 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
                 hitObjectContainer.DrawHeight);
         }
 
-        protected Column ColumnAt(Vector2 screenSpacePosition)
+        protected float PositionAt(double time)
-            => composer.ColumnAt(applyPositionOffset(screenSpacePosition));
-
-        private Vector2 applyPositionOffset(Vector2 position)
         {
-            switch (scrollingInfo.Direction.Value)
+            var pos = scrollingInfo.Algorithm.PositionAt(time,
-            {
+                EditorClock.CurrentTime,
-                case ScrollingDirection.Up:
+                scrollingInfo.TimeRange.Value,
-                    position.Y -= NotePiece.NOTE_HEIGHT / 2;
+                Column.HitObjectContainer.DrawHeight);
-                    break;
-                case ScrollingDirection.Down:
-                    position.Y += NotePiece.NOTE_HEIGHT / 2;
-                    break;
-            }
 
+            return applyPositionOffset(Column.HitObjectContainer.ToSpaceOfOtherDrawable(new Vector2(0, pos), Parent), true).Y;
+        }
+
+        protected Column ColumnAt(Vector2 screenSpacePosition)
+            => composer.ColumnAt(applyPositionOffset(screenSpacePosition, false));
+
+        private Vector2 applyPositionOffset(Vector2 position, bool reverse)
+        {
+            position.Y += (scrollingInfo.Direction.Value == ScrollingDirection.Up && !reverse ? -1 : 1) * NotePiece.NOTE_HEIGHT / 2;
             return position;
         }
     }

osu.Game.Rulesets.Mania/Edit/Blueprints/NotePlacementBlueprint.cs

@@ -2,10 +2,8 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using osu.Framework.Graphics;
-using osu.Framework.Input.Events;
 using osu.Game.Rulesets.Mania.Edit.Blueprints.Components;
 using osu.Game.Rulesets.Mania.Objects;
-using osu.Game.Rulesets.Mania.UI;
 
 namespace osu.Game.Rulesets.Mania.Edit.Blueprints
 {
@@ -28,19 +26,5 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
             Width = SnappedWidth;
             Position = SnappedMousePosition;
         }
-
-        protected override bool OnClick(ClickEvent e)
-        {
-            Column column;
-            if ((column = ColumnAt(e.ScreenSpaceMousePosition)) == null)
-                return base.OnClick(e);
-
-            HitObject.StartTime = TimeAt(e.ScreenSpaceMousePosition);
-            HitObject.Column = column.Index;
-
-            EndPlacement();
-
-            return true;
-        }
     }
 }