#962 – A Color Selection Box Organized by Hue, part I

Here’s some code that generates a spread of different colors.  (We’ll later bind a ComboBox to the generated list of colors).

    public class ColorWithInfo : IComparable
    {
        public Color Color { get; set; }

        public string Info
        {
            get { return string.Format("{0}/{1}/{2}", Color.R, Color.G, Color.B); }
        }

        public string HueSatBright
        {
            get { return string.Format("{0}/{1}/{2}", Hue, Saturation, Brightness); }
        }

        public float Hue
        {
            get { return System.Drawing.Color.FromArgb(Color.R, Color.G, Color.B).GetHue(); }
        }

        public float Saturation
        {
            get { return System.Drawing.Color.FromArgb(Color.R, Color.G, Color.B).GetSaturation(); }
        }

        public float Brightness
        {
            get { return System.Drawing.Color.FromArgb(Color.R, Color.G, Color.B).GetBrightness(); }
        }

        public int CompareTo(object obj)
        {
            ColorWithInfo cwiOther = obj as ColorWithInfo;

            // Sort by Hue, and then Saturation, and then Brightness
            if (this.Hue == cwiOther.Hue)
            {
                if (this.Saturation == cwiOther.Saturation)
                    return this.Brightness.CompareTo(cwiOther.Brightness);
                else
                    return this.Saturation.CompareTo(cwiOther.Saturation);
            }
            else
                return this.Hue.CompareTo(cwiOther.Hue);
        }
    }

    public static class ColorUtil
    {
        public static List<ColorWithInfo> GenerateColorList(int numValsPerColor)
        {
            List<ColorWithInfo> colorList = new List<ColorWithInfo>();

            // Create increment such that we start at 0, end at 255,
            // and have a total of numValsPerColor within that range.
            int delta = Convert.ToInt32(255.0 / ((double)numValsPerColor - 1.0));

            for (int r = 0; r < numValsPerColor; r++)
                for (int g = 0; g < numValsPerColor; g++)
                    for (int b = 0; b < numValsPerColor; b++)
                    {
                        ColorWithInfo cwi = new ColorWithInfo {
                            Color = Color.FromRgb((byte)(r * delta), (byte)(g * delta), (byte)(b * delta))};
                        colorList.Add(cwi);
                    }

            colorList.Sort();

            return colorList;
        }
    }

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

2 Responses to #962 – A Color Selection Box Organized by Hue, part I

  1. Pingback: Dew Drop – December 2, 2013 (#1674) | Morning Dew

  2. Pingback: #963 – A Color Selection Box Organized by Hue, part II | 2,000 Things You Should Know About WPF

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