public static Brush CreateBrush(Rectangle bounds, BackgroundColorBlendCollection colorBlend, int gradientAngle, eGradientType gradientType)
{
eBackgroundColorBlendType blendType = colorBlend.GetBlendType();
if (blendType == eBackgroundColorBlendType.Invalid)
return null;
if (blendType == eBackgroundColorBlendType.SolidColor)
{
return new SolidBrush(colorBlend[0].Color);
}
else if (blendType == eBackgroundColorBlendType.Relative)
{
try
{
if (gradientType == eGradientType.Linear)
{
bounds.Inflate(1, 1);
LinearGradientBrush brush =
DisplayHelp.CreateLinearGradientBrush(bounds, colorBlend[0].Color, colorBlend[colorBlend.Count - 1].Color,
gradientAngle);
brush.InterpolationColors = colorBlend.GetColorBlend();
return brush;
}
else if (gradientType == eGradientType.Radial)
{
int d = (int)Math.Sqrt(bounds.Width * bounds.Width + bounds.Height * bounds.Height) + 4;
GraphicsPath fillPath = new GraphicsPath();
fillPath.AddEllipse(bounds.X - (d - bounds.Width) / 2, bounds.Y - (d - bounds.Height) / 2, d, d);
PathGradientBrush brush = new PathGradientBrush(fillPath);
brush.CenterColor = colorBlend[0].Color;
brush.SurroundColors = new Color[] { colorBlend[colorBlend.Count - 1].Color };
brush.InterpolationColors = colorBlend.GetColorBlend();
return brush;
}
}
catch
{
return null;
}
}
else
{
BackgroundColorBlendCollection bc = colorBlend;
for (int i = 0; i < bc.Count; i += 2)
{
BackgroundColorBlend b1 = bc[i];
BackgroundColorBlend b2 = null;
if (i < bc.Count)
b2 = bc[i + 1];
if (b1 != null && b2 != null)
{
Rectangle rb = new Rectangle(bounds.X, bounds.Y + (int)b1.Position, bounds.Width,
(b2.Position == 1f ? bounds.Height : (int)b2.Position) - (int)b1.Position);
return DisplayHelp.CreateLinearGradientBrush(rb, b1.Color, b2.Color, gradientAngle);
}
}
}
return null;
}
