Rename all DropDown -> Dropdown.

osu.Game/Graphics/UserInterface/OsuDropdownHeader.cs

@@ -0,0 +1,69 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Primitives;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Graphics.UserInterface;
+using osu.Game.Graphics.Sprites;
+using OpenTK.Graphics;
+using osu.Framework.Extensions.Color4Extensions;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    public class OsuDropdownHeader : DropdownHeader
+    {
+        private SpriteText label;
+        protected override string Label
+        {
+            get { return label.Text; }
+            set { label.Text = value; }
+        }
+
+        private Color4? accentColour;
+        public virtual Color4 AccentColour
+        {
+            get { return accentColour.GetValueOrDefault(); }
+            set
+            {
+                accentColour = value;
+                BackgroundColourHover = value;
+            }
+        }
+
+        public OsuDropdownHeader()
+        {
+            Foreground.Padding = new MarginPadding(4);
+
+            AutoSizeAxes = Axes.None;
+            Margin = new MarginPadding { Bottom = 4 };
+            CornerRadius = 4;
+            Height = 40;
+
+            Foreground.Children = new Drawable[]
+            {
+                label = new OsuSpriteText
+                {
+                    Anchor = Anchor.CentreLeft,
+                    Origin = Anchor.CentreLeft,
+                },
+                new TextAwesome
+                {
+                    Icon = FontAwesome.fa_chevron_down,
+                    Anchor = Anchor.CentreRight,
+                    Origin = Anchor.CentreRight,
+                    Margin = new MarginPadding { Right = 4 },
+                    TextSize = 20
+                }
+            };
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            BackgroundColour = Color4.Black.Opacity(0.5f);
+            BackgroundColourHover = accentColour ?? colours.PinkDarker;
+        }
+    }
+}