Initial Commit

Common/Palettes/DecoratorPaletteBase.cs

@@ -0,0 +1,66 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows.Media;
+
+namespace Microsoft.Research.DynamicDataDisplay.Common.Palettes
+{
+	/// <summary>
+	/// Represents a base class for decorating palette, which wraps another palette and intercepts calls to it.
+	/// </summary>
+	public abstract class DecoratorPaletteBase : PaletteBase
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="DecoratorPaletteBase"/> class.
+		/// </summary>
+		protected DecoratorPaletteBase() { }
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="DecoratorPaletteBase"/> class.
+		/// </summary>
+		/// <param name="palette">The palette.</param>
+		public DecoratorPaletteBase(IPalette palette)
+		{
+			Palette = palette;
+		}
+
+		private IPalette palette = null;
+		/// <summary>
+		/// Gets or sets the palette being decorated.
+		/// </summary>
+		/// <value>The palette.</value>
+		public IPalette Palette
+		{
+			get { return palette; }
+			set
+			{
+				if (value == null)
+					throw new ArgumentNullException("value");
+
+				if (palette != null)
+					palette.Changed -= OnChildPaletteChanged;
+
+				palette = value;
+				palette.Changed += OnChildPaletteChanged;
+
+				RaiseChanged();
+			}
+		}
+
+		void OnChildPaletteChanged(object sender, EventArgs e)
+		{
+			RaiseChanged();
+		}
+
+		/// <summary>
+		/// Gets the color by interpolation coefficient.
+		/// </summary>
+		/// <param name="t">Interpolation coefficient, should belong to [0..1].</param>
+		/// <returns>Color.</returns>
+		public override Color GetColor(double t)
+		{
+			return palette.GetColor(t);
+		}
+	}
+}