Initial Commit

Common/Auxiliary/BrushHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows.Media;
+
+namespace Microsoft.Research.DynamicDataDisplay
+{
+	public static class BrushHelper
+	{
+		/// <summary>
+		/// Creates a SolidColorBrush with random hue of its color.
+		/// </summary>
+		/// <returns>A SolicColorBrush with random hue of its color.</returns>
+		public static SolidColorBrush CreateBrushWithRandomHue()
+		{
+			return new SolidColorBrush { Color = ColorHelper.CreateColorWithRandomHue() };
+		}
+
+		/// <summary>
+		/// Makes SolidColorBrush transparent.
+		/// </summary>
+		/// <param name="brush">The brush.</param>
+		/// <param name="alpha">The alpha, [0..255]</param>
+		/// <returns></returns>
+		public static SolidColorBrush MakeTransparent(this SolidColorBrush brush, int alpha)
+		{
+			Color color = brush.Color;
+			color.A = (byte)alpha;
+
+			return new SolidColorBrush(color);
+		}
+
+		/// <summary>
+		/// Makes SolidColorBrush transparent.
+		/// </summary>
+		/// <param name="brush">The brush.</param>
+		/// <param name="alpha">The alpha, [0.0 .. 1.0].</param>
+		/// <returns></returns>
+		public static SolidColorBrush MakeTransparent(this SolidColorBrush brush, double opacity)
+		{
+			return MakeTransparent(brush, (int)(opacity * 255));
+		}
+
+		public static SolidColorBrush ChangeLightness(this SolidColorBrush brush, double lightnessFactor)
+		{
+			Color color = brush.Color;
+			HsbColor hsbColor = HsbColor.FromArgbColor(color);
+			hsbColor.Brightness *= lightnessFactor;
+
+			if (hsbColor.Brightness > 1.0) hsbColor.Brightness = 1.0;
+
+			SolidColorBrush result = new SolidColorBrush(hsbColor.ToArgbColor());
+			return result;
+		}
+
+		public static SolidColorBrush ChangeSaturation(this SolidColorBrush brush, double saturationFactor)
+		{
+			Color color = brush.Color;
+			HsbColor hsbColor = HsbColor.FromArgbColor(color);
+			hsbColor.Saturation *= saturationFactor;
+
+			if (hsbColor.Saturation > 1.0) hsbColor.Saturation = 1.0;
+
+			SolidColorBrush result = new SolidColorBrush(hsbColor.ToArgbColor());
+			return result;
+		}
+	}
+}