HSL.cs

using System.Drawing;
 
namespace be.gaudry.model.drawing.colors.converter
{
    public class HSL
    {
        #region declarations and constructors
        private float hue, saturation, luminance;
        private Color color;
        private bool validColor;
 
        /// <summary>
        /// Constructor of a HSL object
        /// </summary>
        public HSL(){}
 
        /// <summary>
        /// Constructor of a HSL object
        /// </summary>
        /// <param name="hue">Hue value</param>
        /// <param name="saturation">Saturation value</param>
        /// <param name="luminance">Luminance value</param>
        public HSL(float hue, float saturation, float luminance)
            : this()
        {
            this.Hue = hue;
            this.Saturation = saturation;
            this.Luminance = luminance;
        }
 
        /// <summary>
        /// Constructor of a HSL object
        /// </summary>
        /// <param name="color">Color</param>
        public HSL(Color color)
            : this()
        {
            Color = color;
        } 
        #endregion
 
        #region properties
 
        /// <summary>
        /// Hue value
        /// </summary>
        /// <remarks>Hue value is valid between 0 and 359</remarks>
        public float Hue
        {
            get { return hue; }
            set
            {
                hue = value;
                //color is modified, force Color attribute to get it
                validColor = false;
            }
        }
        /// <summary>
        /// Saturation value
        /// </summary>
        /// <remarks>Saturation value is valid between 0 and 100</remarks>
        public float Saturation
        {
            get { return saturation; }
            set
            {
                saturation = value;
                //color is modified, force Color attribute to get it
                validColor = false;
            }
        }
        /// <summary>
        /// Luminance value
        /// </summary>
        /// <remarks>Luminance value is valid between 0 and 100</remarks>
        public float Luminance
        {
            get { return luminance; }
            set
            {
                luminance = value;
                //color is modified, force Color attribute to get it
                validColor = false;
            }
        }
        /// <summary>
        /// Get or set the Color represented by the RGB object 
        /// </summary>
        public Color Color
        {
            get 
            {
                if (!validColor)
                {
                    color = ColorsConverter.HSL2RGB(this).Color;
                    validColor = true;
                }
                return color;
            }
            set
            {
                color = value;
                hue = color.GetHue();
                saturation = color.GetSaturation();
                luminance = color.GetBrightness();
                validColor = true;
            }
        } 
        #endregion
    }
}