source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Common/Auxiliary/ColorHelper.cs @ 12503

using System;
using System.Windows.Media;
using System.Diagnostics.CodeAnalysis;

namespace Microsoft.Research.DynamicDataDisplay
{
  public static class ColorHelper
  {
    private readonly static Random random = new Random();

    /// <summary>
    /// Creates color from HSB color space with random hue and saturation and brighness equal to 1.
    /// </summary>
    /// <returns></returns>
    public static Color CreateColorWithRandomHue()
    {
      double hue = random.NextDouble() * 360;
      HsbColor hsbColor = new HsbColor(hue, 1, 1);
      return hsbColor.ToArgbColor();
    }

    public static Color[] CreateRandomColors(int colorNum)
    {
      double startHue = random.NextDouble() * 360;

      Color[] res = new Color[colorNum];
      double hueStep = 360.0 / colorNum;
      for (int i = 0; i < res.Length; i++)
      {
        double hue = startHue + i * hueStep;
        res[i] = new HsbColor(hue, 1, 1).ToArgbColor();
      }

      return res;
    }

    /// <summary>
    /// Creates color with fully random hue and slightly random saturation and brightness.
    /// </summary>
    /// <returns></returns>
    public static Color CreateRandomHsbColor()
    {
      double h = random.NextDouble() * 360;
      double s = random.NextDouble() * 0.5 + 0.5;
      double b = random.NextDouble() * 0.25 + 0.75;
      return new HsbColor(h, s, b).ToArgbColor();
    }

    /// <summary>
    /// Creates color with random hue.
    /// </summary>
    /// <param name="saturation">The saturation, [0..1].</param>
    /// <param name="brightness">The brightness, [0..1]</param>
    /// <returns></returns>
    public static Color CreateColorWithRandomHue(double saturation, double brightness)
    {
      double h = random.NextDouble() * 360;

      return new HsbColor(h, saturation, brightness).ToArgbColor();
    }

    /// <summary>
    /// Creates brush with random hue.
    /// </summary>
    /// <param name="saturation">The saturation, [0..1].</param>
    /// <param name="brightness">The brightness, [0..1].</param>
    /// <returns></returns>
    public static Brush CreateBrushWithRandomHue(double saturation, double brightness)
    {
      Color color = CreateColorWithRandomHue(saturation, brightness);

      return new SolidColorBrush(color);
    }

    /// <summary>
    /// Gets the random color (this property is created to use it from Xaml).
    /// </summary>
    /// <value>The random color.</value>
    public static Color RandomColor
    {
      get { return CreateRandomHsbColor(); }
    }

    /// <summary>
    /// Gets the random brush.
    /// </summary>
    /// <value>The random brush.</value>
    public static SolidColorBrush RandomBrush
    {
      get
      {
        Color color = CreateColorWithRandomHue();
        SolidColorBrush brush = new SolidColorBrush(color);
        return brush;
      }
    }

    public static int ToArgb(this Color color)
    {
      int result =
        color.A << 24 |
        color.R << 16 |
        color.G << 8 |
        color.B;

      return result;
    }
  }
}