public void Draw(Graphics g)
{
using (Pen p = new Pen(Color.White)) {
p.Width = (RadiusOut - RadiusIn);
int r = (RadiusOut + RadiusIn) / 2;
g.DrawEllipse(p, X - r, Y - r, 2 * r, 2 * r);
}
using (Pen p = new Pen(Color.Black)) {
p.Width = 1.0F;
g.DrawEllipse(p, X - RadiusIn, Y - RadiusIn, 2 * RadiusIn, 2 * RadiusIn);
g.DrawEllipse(p, X - RadiusOut, Y - RadiusOut, 2 * RadiusOut, 2 * RadiusOut);
}
// Draw the slice borders
using (Pen p = new Pen(Color.Black)) {
p.Width = 1.0F;
Matrix m = new Matrix();
float ang = (float)360 / (float)Slices.Count;
float angSum = 0;
float angMouse = (float)AngMouse() *
(180 / (float)Math.PI); // Radians to degrees
// Make the mouse angle go from 0..360 as the slice angles.
if (angMouse < 0)
{
angMouse += 360;
}
foreach (var s in Slices)
{
bool sel = (angSum <= angMouse) && (angMouse <= (angSum + ang));
m.Reset();
m.RotateAt(angSum, new Point(X, Y), MatrixOrder.Append);
g.Transform = m;
g.DrawLine(p, X + RadiusIn, Y, X + RadiusOut, Y);
// Rotate a little bit more to show the text
m.RotateAt(ang / 2, new Point(X, Y), MatrixOrder.Append);
g.Transform = m;
// FIXME: Render the text in upright position
RenderText(g, s.Name, X + RadiusIn + 5, Y - 6, sel);
g.ResetTransform();
angSum += ang;
if (sel)
{
SelectedSlice = s;
}
}
m.Dispose();
m = null;
}
}
public void AddSlice(MenuSlice type, string text)
{
ContextMenuSlice s = new ContextMenuSlice(type, text);
Slices.Add(s);
}