} // the angles of the spokes, in radians
//public double R { get { return TheShape.R; } set { TheShape.R = value; } }
//public Point Center { get { return TheShape.Center; } set { TheShape.Center = value; } }
//public List<double> Spokes { get { return TheShape.Spokes; } set { TheShape.Spokes = value; } } // the angles of the spokes, in radians
/// <summary>
/// Draw an arc
/// </summary>
/// <param name="dc"></param>
public override void Draw(Cairo.Context dc)
{
if (R == 0 || Spokes == null || Spokes.Count < 2 || ThePen == null)
{
return;
}
dc.DrawLine(Center, spokep(0)); //ThePen,
for (int i = 1; i < Spokes.Count; i++)
{
if (Math.Abs(Spokes[i] - Spokes[i - 1]) > 2 * Math.PI - .001)
{
// Display a circle
double ControlPointRatio = (Math.Sqrt(2) - 1) * 4 / 3;
var x0 = (float)(Center.X - R);
var x1 = (float)(Center.X - R * ControlPointRatio);
var x2 = (float)(Center.X);
var x3 = (float)(Center.X + R * ControlPointRatio);
var x4 = (float)(Center.X + R);
var y0 = (float)(Center.Y - R);
var y1 = (float)(Center.Y - R * ControlPointRatio);
var y2 = (float)(Center.Y);
var y3 = (float)(Center.Y + R * ControlPointRatio);
var y4 = (float)(Center.Y + R);
System.Windows.Point[] pts = new System.Windows.Point[] { new System.Windows.Point(x2, y0), new System.Windows.Point(x3, y0), new System.Windows.Point(x4, y1),
new System.Windows.Point(x4, y2), new System.Windows.Point(x1, y4), new System.Windows.Point(x0, y3), new System.Windows.Point(x0, y2),
new System.Windows.Point(x0, y1), new System.Windows.Point(x1, y0), new System.Windows.Point(x2, y0) };
dc.DrawBeziers(pts); //ThePen,
/* context.BeginFigure(new Point(x2, y0), true, true);
* context.BezierTo(new Point(x3, y0), new Point(x4, y1), new Point(x4, y2), true, true);
* context.BezierTo(new Point(x4, y3), new Point(x3, y4), new Point(x2, y4), true, true);
* context.BezierTo(new Point(x1, y4), new Point(x0, y3), new Point(x0, y2), true, true);
* context.BezierTo(new Point(x0, y1), new Point(x1, y0), new Point(x2, y0), true, true); */
}
else
{
bool largearc = Math.Abs(Spokes[i] - Spokes[i - 1]) > Math.PI;
/* SweepDirection sd = SweepDirection.Counterclockwise;
* if (Spokes[i] < Spokes[i - 1])
* sd = SweepDirection.Clockwise;
*
* dc.DrawArc(ThePen, (float)Center.X, (float(Center.Y), (float)R, (float)R, )
* context.ArcTo(spokep(i), new Size(R, R), 0, largearc, sd, true, false);*/
//TODO:support
}
dc.DrawLine(Center, spokep(i));//ThePen,
}
}