using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Yw.WinFrmUI.Phart
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{
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/// <summary>
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/// 随机色辅助类
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/// </summary>
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public class RandomColorHelper
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{
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private static readonly List<Color> _color_array = new List<Color>()
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{
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Color.Red, Color.Blue, Color.Green,Color.DodgerBlue,
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Color.Fuchsia, Color.MidnightBlue, Color.Maroon, Color.Aquamarine,
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Color.Bisque,Color.BurlyWood
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};
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/// <summary>
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/// 获取随机颜色
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/// </summary>
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/// <returns></returns>
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public static Color Get(int count)
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{
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if (count < _color_array.Count)
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{
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return _color_array[count];
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}
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//var _random = new Random();
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//int r = _random.Next(1, 256);
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//int g = _random.Next(1, 256);
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//int b = _random.Next(1, 256);
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//return Color.FromArgb(r, g, b);
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return GetRandomDarkColor();
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}
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private static Color GetRandomDarkColor()
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{
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Random random = new Random();
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int r, g, b;
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do
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{
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r = random.Next(256);
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g = random.Next(256);
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b = random.Next(256);
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} while (CalculateBrightness(r, g, b) > 128); // 确保颜色是深色
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return Color.FromArgb(r, g, b);
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}
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private static int CalculateBrightness(int r, int g, int b)
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{
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// 计算颜色的亮度，亮度值越低，颜色越深
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return (r + g + b) / 3;
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}
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}
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}
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