Resurrected old colour picker.

OpenRA.Mods.Common/Widgets/HueSliderWidget.cs

@@ -0,0 +1,69 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Graphics;
+using OpenRA.Primitives;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets
+{
+	public class HueSliderWidget : SliderWidget
+	{
+		Sprite hueSprite;
+		Sprite pickerSprite;
+
+		public HueSliderWidget() { }
+		public HueSliderWidget(HueSliderWidget other)
+			: base(other) { }
+
+		public override void Initialize(WidgetArgs args)
+		{
+			base.Initialize(args);
+
+			var hueSheet = new Sheet(SheetType.BGRA, new Size(256, 1));
+
+			var buffer = new byte[4 * 256];
+
+			unsafe
+			{
+				fixed (byte* cc = &buffer[0])
+				{
+					var c = (int*)cc;
+					for (var h = 0; h < 256; h++)
+					{
+						#pragma warning disable IDE0047
+						(*(c + 0 * 256 + h)) = Color.FromAhsv(h / 255f, 1, 1).ToArgb();
+						#pragma warning restore IDE0047
+					}
+				}
+			}
+
+			var rect = new Rectangle(0, 0, 256, 1);
+			hueSprite = new Sprite(hueSheet, new Rectangle(0, 0, 256, 1), TextureChannel.RGBA);
+			hueSheet.GetTexture().SetData(buffer, 256, 1);
+
+			pickerSprite = ChromeProvider.GetImage("lobby-bits", "huepicker");
+		}
+
+		public override void Draw()
+		{
+			if (!IsVisible())
+				return;
+
+			var ro = RenderOrigin;
+			var rb = RenderBounds;
+			WidgetUtils.DrawSprite(hueSprite, ro, rb.Size);
+
+			var pos = RenderOrigin + new int2(PxFromValue(Value).Clamp(0, rb.Width - 1) - (int)pickerSprite.Size.X / 2, (rb.Height - (int)pickerSprite.Size.Y) / 2);
+			WidgetUtils.DrawSprite(pickerSprite, pos);
+		}
+	}
+}