Add BigBlackBox for skinning testing purposes

osu.Game/Skinning/Components/BigBlackBox.cs

@@ -0,0 +1,47 @@
+// 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 JetBrains.Annotations;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics.Sprites;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Skinning.Components
+{
+    /// <summary>
+    /// Intended to be a test bed for skinning. May be removed at some point in the future.
+    /// </summary>
+    [UsedImplicitly]
+    public class BigBlackBox : CompositeDrawable, ISkinnableDrawable
+    {
+        public bool UsesFixedAnchor { get; set; }
+
+        public BigBlackBox()
+        {
+            Size = new Vector2(150);
+
+            Masking = true;
+            CornerRadius = 20;
+            CornerExponent = 5;
+
+            InternalChildren = new Drawable[]
+            {
+                new Box
+                {
+                    Colour = Color4.Black,
+                    RelativeSizeAxes = Axes.Both,
+                },
+
+                new OsuSpriteText
+                {
+                    Text = "Big Black Box",
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                }
+            };
+        }
+    }
+}