private void picBD_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
int xstep = 12;
int x = picBD.ClientRectangle.X;
int xx;
for (int i = 0; i < xstep; i++)
{
xx = picBD.ClientRectangle.X + (int)((double)(i + 1) * (double)picBD.ClientRectangle.Width / (double)xstep);
Color col;
if (i < xstep / 2)
{
col = ColorUtil.BrightColor(color, (double)(xstep / 2 - 1 - i) / (double)(xstep / 2 - 1));
}
else
{
col = ColorUtil.DarkColor(color, (double)(i - (xstep / 2 - 1) - 1) / (double)(xstep / 2 - 1));
}
using (Brush br = new SolidBrush(col)) {
g.FillRectangle(br, x, picBD.ClientRectangle.Y, xx - x, picBD.ClientRectangle.Height);
}
x = xx;
}
}