CommonTools/ColorPickerCtrl/HSLColor.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;

namespace CommonTools
{
	public struct HSLColor 
	{
		double m_hue;
		double m_saturation;
		double m_lightness;
		// http://en.wikipedia.org/wiki/HSL_color_space

		public double Hue
		{
			get { return m_hue; }
			set { m_hue = value; }
		}
		public double Saturation
		{
			get { return m_saturation; }
			set { m_saturation = value; }
		}
		public double Lightness
		{
			get { return m_lightness; }
			set
			{ 
				m_lightness = value;
				if (m_lightness < 0)
					m_lightness = 0;
				if (m_lightness > 1)
					m_lightness = 1;
			}
		}
		public HSLColor(double hue, double saturation, double lightness)
		{
			m_hue = Math.Min(360, hue);
			m_saturation = Math.Min(1, saturation);
			m_lightness = Math.Min(1, lightness);
		}
		public HSLColor(Color color)
		{
			m_hue = 0;
			m_saturation = 1;
			m_lightness = 1;
			FromRGB(color);
		}
		public Color Color
		{
			get { return ToRGB(); }
			set { FromRGB(value); }
		}
		void FromRGB(Color cc)
		{
			double r = (double)cc.R / 255d;
			double g = (double)cc.G / 255d;
			double b = (double)cc.B / 255d;