SelectionBox -> SelectionHandler

osu.Game.Rulesets.Mania/Edit/ManiaSelectionHandler.cs

@@ -0,0 +1,94 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Input.Events;
+using osu.Framework.Timing;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.UI;
+using osu.Game.Rulesets.UI.Scrolling;
+using osu.Game.Screens.Edit.Compose.Components;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public class ManiaSelectionHandler : SelectionHandler
+    {
+        [Resolved]
+        private IScrollingInfo scrollingInfo { get; set; }
+
+        [Resolved]
+        private IManiaHitObjectComposer composer { get; set; }
+
+        private IClock editorClock;
+
+        [BackgroundDependencyLoader]
+        private void load(IAdjustableClock clock)
+        {
+            editorClock = clock;
+        }
+
+        public override void HandleDrag(DragEvent dragEvent)
+        {
+            foreach (var blueprint in SelectedBlueprints)
+            {
+                var hitObject = blueprint.HitObject;
+
+                var objectParent = (HitObjectContainer)hitObject.Parent;
+
+                // Using the hitobject position is required since AdjustPosition can be invoked multiple times per frame
+                // without the position having been updated by the parenting ScrollingHitObjectContainer
+                hitObject.Y += dragEvent.Delta.Y;
+
+                float targetPosition;
+
+                // 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
+                if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
+                    targetPosition = -hitObject.Position.Y;
+                else
+                    targetPosition = hitObject.Position.Y;
+
+                objectParent.Remove(hitObject);
+
+                hitObject.HitObject.StartTime = scrollingInfo.Algorithm.TimeAt(targetPosition,
+                    editorClock.CurrentTime,
+                    scrollingInfo.TimeRange.Value,
+                    objectParent.DrawHeight);
+
+                objectParent.Add(hitObject);
+            }
+
+            adjustColumn(dragEvent);
+        }
+
+        private void adjustColumn(DragEvent dragEvent)
+        {
+            var lastColumn = composer.ColumnAt(dragEvent.ScreenSpaceLastMousePosition);
+            var currentColumn = composer.ColumnAt(dragEvent.ScreenSpaceMousePosition);
+            if (lastColumn == null || currentColumn == null)
+                return;
+
+            int columnDelta = currentColumn.Index - lastColumn.Index;
+            if (columnDelta == 0)
+                return;
+
+            int minColumn = int.MaxValue;
+            int maxColumn = int.MinValue;
+
+            foreach (var obj in SelectedHitObjects.OfType<ManiaHitObject>())
+            {
+                if (obj.Column < minColumn)
+                    minColumn = obj.Column;
+                if (obj.Column > maxColumn)
+                    maxColumn = obj.Column;
+            }
+
+            columnDelta = MathHelper.Clamp(columnDelta, -minColumn, composer.TotalColumns - 1 - maxColumn);
+
+            foreach (var obj in SelectedHitObjects.OfType<ManiaHitObject>())
+                obj.Column += columnDelta;
+        }
+    }
+}