public CPColor GetCPColor(Color color)
{
lock (cpcolors) {
object tmp = cpcolors [color];
if (tmp == null)
{
CPColor cpcolor = new CPColor();
cpcolor.Dark = ControlPaint.Dark(color);
cpcolor.DarkDark = ControlPaint.DarkDark(color);
cpcolor.Light = ControlPaint.Light(color);
cpcolor.LightLight = ControlPaint.LightLight(color);
cpcolors.Add(color, cpcolor);
return(cpcolor);
}
return((CPColor)tmp);
}
}
protected virtual void DrawGradientBackground(Graphics g)
{
int radius = RoundCornerDiameter / 2;
using (LinearGradientBrush brush = new LinearGradientBrush(
new Point(this.Width / 2, 0),
new Point(this.Width / 2, this.Height),
this.BackGradientLightColor,
this.BackGradientDarkColor
))
{
g.FillRoundedRectangle(brush, 0, 0, this.Width, this.Height, radius);
}
if (ShowShade)
{
Rectangle shadeArea = new Rectangle(1,
this.Height / 2,
this.Width - 4,
this.Height / 2);
using (LinearGradientBrush brush = new LinearGradientBrush(shadeArea, this.ShadeColor, ControlPaint.LightLight(this.ShadeColor), 90f))
{
g.FillRoundedRectangle(
brush,
shadeArea,
radius);
// 填补顶部的边线(出现的原因未知)
using (Pen earser = new Pen(this.ShadeColor))
{
g.DrawLine(earser, shadeArea.X + radius, shadeArea.Y, shadeArea.Width - radius, shadeArea.Y);
}
}
}
}