Remove intermediate Screens namespace

osu.Game/Screens/Edit/Compose/Components/DragBox.cs

@@ -0,0 +1,91 @@
+// 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;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Primitives;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Input.Events;
+using OpenTK.Graphics;
+
+namespace osu.Game.Screens.Edit.Compose.Components
+{
+    /// <summary>
+    /// A box that displays the drag selection and provides selection events for users to handle.
+    /// </summary>
+    public class DragBox : CompositeDrawable
+    {
+        private readonly Action<RectangleF> performSelection;
+
+        /// <summary>
+        /// Invoked when the drag selection has finished.
+        /// </summary>
+        public event Action DragEnd;
+
+        private Drawable box;
+
+        /// <summary>
+        /// Creates a new <see cref="DragBox"/>.
+        /// </summary>
+        /// <param name="performSelection">A delegate that performs drag selection.</param>
+        public DragBox(Action<RectangleF> performSelection)
+        {
+            this.performSelection = performSelection;
+
+            RelativeSizeAxes = Axes.Both;
+            AlwaysPresent = true;
+            Alpha = 0;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            InternalChild = box = new Container
+            {
+                Masking = true,
+                BorderColour = Color4.White,
+                BorderThickness = SelectionBox.BORDER_RADIUS,
+                Child = new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Alpha = 0.1f
+                }
+            };
+        }
+
+        protected override bool OnDragStart(DragStartEvent e)
+        {
+            this.FadeIn(250, Easing.OutQuint);
+            return true;
+        }
+
+        protected override bool OnDrag(DragEvent e)
+        {
+            var dragPosition = e.ScreenSpaceMousePosition;
+            var dragStartPosition = e.ScreenSpaceMouseDownPosition;
+
+            var dragQuad = new Quad(dragStartPosition.X, dragStartPosition.Y, dragPosition.X - dragStartPosition.X, dragPosition.Y - dragStartPosition.Y);
+
+            // We use AABBFloat instead of RectangleF since it handles negative sizes for us
+            var dragRectangle = dragQuad.AABBFloat;
+
+            var topLeft = ToLocalSpace(dragRectangle.TopLeft);
+            var bottomRight = ToLocalSpace(dragRectangle.BottomRight);
+
+            box.Position = topLeft;
+            box.Size = bottomRight - topLeft;
+
+            performSelection?.Invoke(dragRectangle);
+            return true;
+        }
+
+        protected override bool OnDragEnd(DragEndEvent e)
+        {
+            this.FadeOut(250, Easing.OutQuint);
+            DragEnd?.Invoke();
+            return true;
+        }
+    }
+}