/// <summary>
/// 获取预设的渐变颜色条带列表
/// </summary>
/// <param name="colNum">每一行的颜色个数</param>
/// <param name="alpha">透明度</param>
/// <returns></returns>
public static List <LinearColorRampInfo> GetLinearColorRamps(int colNum, int alpha)
{
List <LinearColorRampInfo> colorRampList = new List <LinearColorRampInfo>();
List <Color> starts = new List <Color>();
List <Color> ends = new List <Color>();
starts.AddRange(new Color[] { Color.Green, Color.White, Color.Red, Color.Red, Color.LightBlue, Color.LightCyan });
ends.AddRange(new Color[] { Color.Blue, Color.Black, Color.Green, Color.Blue, Color.Blue, Color.Cyan });
List <Color> defColor = GetAllDefColors();
if (defColor.Count > 20)
{
int count = 0;
int index = 0;
int i = 0;
while (count < 22)
{
i++;
if (i > 1000)
{
break;
}
if (index > defColor.Count - 2)
{
index = 0;
}
Color start = defColor[index];
Color end = defColor[++index];
if (Math.Abs(start.R - end.R) < 50 && Math.Abs(start.B - end.B) < 50 && Math.Abs(start.G - end.G) < 50)
{
continue;
}
starts.Add(start);
ends.Add(end);
count++;
}
}
for (int i = 0; i < starts.Count; i++)
{
LinearColorRampInfo colorRamp = new LinearColorRampInfo(starts[i], ends[i]);
for (int j = 0; j < colNum; j++)
{
int r = starts[i].R + (ends[i].R - starts[i].R) * j / colNum;
int g = starts[i].G + (ends[i].G - starts[i].G) * j / colNum;
int b = starts[i].B + (ends[i].B - starts[i].B) * j / colNum;
Color c = Color.FromArgb(alpha, r, g, b);
colorRamp.ColorList.Add(c);
}
colorRampList.Add(colorRamp);
}
return(colorRampList);
}
/// <summary>
/// 获取预设的渐变颜色条带列表
/// </summary>
/// <param name="colNum">每一行的颜色个数</param>
/// <param name="alpha">透明度</param>
/// <returns></returns>
public static List <LinearColorRampInfo> GetLinearColorRamps1(int colNum, int alpha)
{
List <LinearColorRampInfo> colorRampList = new List <LinearColorRampInfo>();
Color[] starts = { Color.Green, Color.Black, Color.White, Color.Red, Color.Red, Color.LightBlue, Color.LightCoral, Color.LightCyan, Color.LightGray, Color.LightGreen, Color.LightPink, Color.LightSalmon, Color.LightSeaGreen, Color.LightSkyBlue, Color.LightSlateGray, Color.LightSteelBlue, Color.LightYellow };
Color[] ends = { Color.Blue, Color.White, Color.Black, Color.Green, Color.Blue, Color.Blue, Color.Coral, Color.Cyan, Color.Gray, Color.Green, Color.Pink, Color.Salmon, Color.SeaGreen, Color.SkyBlue, Color.SlateGray, Color.SteelBlue, Color.Yellow };
for (int i = 0; i < starts.Length; i++)
{
LinearColorRampInfo colorRamp = new LinearColorRampInfo(starts[i], ends[i]);
for (int j = 0; j < colNum; j++)
{
int r = starts[i].R + (ends[i].R - starts[i].R) * j / colNum;
int g = starts[i].G + (ends[i].G - starts[i].G) * j / colNum;
int b = starts[i].B + (ends[i].B - starts[i].B) * j / colNum;
Color c = Color.FromArgb(alpha, r, g, b);
colorRamp.ColorList.Add(c);
}
colorRampList.Add(colorRamp);
}
return(colorRampList);
}