Color picker panel; sliders don't work yet

OpenRA.Game/Widgets/ShpImageWidget.cs

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+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it 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.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using System;
+using OpenRA.Graphics;
+
+namespace OpenRA.Widgets
+{
+	public class ShpImageWidget : Widget
+	{
+		public string Image = "";
+		public int Frame = 0;
+		public string Palette = "chrome";
+		
+		public Func<string> GetImage;
+		public Func<int> GetFrame;
+		public Func<string> GetPalette;
+		
+		public ShpImageWidget()
+			: base()
+		{
+			GetImage = () => { return Image; };
+			GetFrame = () => { return Frame; };
+			GetPalette = () => { return Palette; };
+		}
+
+		protected ShpImageWidget(ShpImageWidget other)
+			: base(other)
+		{
+			Image = other.Image;
+			Frame = other.Frame;
+			Palette = other.Palette;
+			GetImage = other.GetImage;
+			GetFrame = other.GetFrame;
+			GetPalette = other.GetPalette;
+		}
+
+		public override Widget Clone() { return new ShpImageWidget(this); }
+
+		
+		Sprite sprite = null;
+		string cachedImage = null;
+		int cachedFrame= -1;
+		public override void DrawInner(World world)
+		{
+			var image = GetImage();
+			var frame = GetFrame();
+			var palette = GetPalette();
+		
+			if (image != cachedImage || frame != cachedFrame)
+			{
+				sprite = SpriteSheetBuilder.LoadAllSprites(image)[frame];
+				cachedImage = image;
+				cachedFrame = frame;
+			}
+			
+			Game.chrome.renderer.WorldSpriteRenderer.DrawSprite(sprite,RenderOrigin, palette);
+		}
+	}
+}