protected void BuildTickPath()
{
tickBrush = new LinearGradientBrush(Point.Empty, new Point(0, width),
color, Color.FromArgb(color.R / 2, color.G / 2, color.B / 2));
tickBrush.SetSigmaBellShape(.5f, 1);
tickPath = PredefinedShapes.Rectangle(width, height);
}
public void Paint(Graphics g, float angle)
{
Matrix centerMatrix = g.Transform;
//double valueRange = (max - min);
//float vAngle = (float)(value * sweepAngle / valueRange);
Brush shadow = new SolidBrush(Color.FromArgb(50, Color.Black));
Brush capBrush =
new LinearGradientBrush(
new PointF(-capWidth * 0.707f, -capWidth * 0.707f),
new PointF(capWidth * 0.707f, capWidth * 0.707f), Color.LightGray, Color.Black);
Brush brush =
new LinearGradientBrush(new PointF(0, width), new PointF(0, -width), Color.White, Color.Red);
GraphicsPath path = PredefinedShapes.Needle(width, (int)radius);
GraphicsPath capPath = new GraphicsPath();
capPath.AddArc(capWidth * -0.5f, capWidth * -0.5f, capWidth, capWidth, 0, 360);
Region needleRegion = new Region(path);
needleRegion.Union(capPath);
// shadow
Matrix old = g.Transform;
// shadow offset
g.TranslateTransform(shadowOffset, shadowOffset);
g.RotateTransform(angle);
g.FillRegion(shadow, needleRegion);
// restore matrix
g.Transform = old;
g.RotateTransform(angle);
// draw needle
g.FillPath(brush, path);
g.DrawPath(Pens.Black, path);
g.Transform = centerMatrix;
// draw cap
g.FillPath(capBrush, capPath);
g.DrawPath(Pens.Black, capPath);
//g.DrawLine(Pens.White, Point.Empty, new PointF(radius, 0));
}