public override void AddShape(WpfPoint point, WpfStreamGeometryContext sgc)
{
var start = new WpfPoint(point.X, point.Y - Size * 0.5);
sgc.BeginFigure(start, true, true);
sgc.ArcTo(start, new Size(Size, Size), 360, true, WpfSweepDirection.Clockwise, true, true);
}
static void AddArrow(WStreamGeometryContext context, MPoint start, MPoint end, double thickness)
{
if (thickness > 1)
{
MPoint dir = end - start;
MPoint h = dir;
double dl = dir.Length;
if (dl < 0.001)
{
return;
}
dir /= dl;
var s = new MPoint(-dir.Y, dir.X);
double w = 0.5 * thickness;
MPoint s0 = w * s;
s *= h.Length * HalfArrowAngleTan;
s += s0;
double rad = w / HalfArrowAngleCos;
context.BeginFigure(Common.WpfPoint(start + s), true, true);
context.LineTo(Common.WpfPoint(start - s), true, false);
context.LineTo(Common.WpfPoint(end - s0), true, false);
context.ArcTo(Common.WpfPoint(end + s0), new WSize(rad, rad),
Math.PI - ArrowAngle, false, WSweepDirection.Clockwise, true, false);
}
else
{
MPoint dir = end - start;
double dl = dir.Length;
//take into account the widths
double delta = Math.Min(dl / 2, thickness + thickness / 2);
dir *= (dl - delta) / dl;
end = start + dir;
dir = dir.Rotate(Math.PI / 2);
MPoint s = dir * HalfArrowAngleTan;
context.BeginFigure(Common.WpfPoint(start + s), true, true);
context.LineTo(Common.WpfPoint(end), true, true);
context.LineTo(Common.WpfPoint(start - s), true, true);
}
}
static void FillContexForCurve(WStreamGeometryContext context, Curve c)
{
foreach (ICurve seg in c.Segments)
{
var bezSeg = seg as CubicBezierSegment;
if (bezSeg != null)
{
context.BezierTo(Common.WpfPoint(bezSeg.B(1)),
Common.WpfPoint(bezSeg.B(2)), Common.WpfPoint(bezSeg.B(3)), true, false);
}
else
{
var ls = seg as MLineSegment;
if (ls != null)
{
context.LineTo(Common.WpfPoint(ls.End), true, false);
}
else
{
var ellipse = seg as MEllipse;
if (ellipse != null)
{
double sweepAngle = EllipseSweepAngle(ellipse);
bool largeArc = Math.Abs(sweepAngle) >= Math.PI;
MRectangle box = ellipse.FullBox();
context.ArcTo(Common.WpfPoint(ellipse.End),
new WSize(box.Width / 2, box.Height / 2),
sweepAngle,
largeArc,
sweepAngle < 0
? WSweepDirection.Counterclockwise
: WSweepDirection.Clockwise,
true, true);
}
else
{
throw new NotImplementedException();
}
}
}
}
}
internal static void FillContextForICurve(WStreamGeometryContext context, ICurve iCurve)
{
context.BeginFigure(Common.WpfPoint(iCurve.Start), false, false);
var c = iCurve as Curve;
if (c != null)
{
FillContexForCurve(context, c);
}
else
{
var cubicBezierSeg = iCurve as CubicBezierSegment;
if (cubicBezierSeg != null)
{
context.BezierTo(Common.WpfPoint(cubicBezierSeg.B(1)), Common.WpfPoint(cubicBezierSeg.B(2)),
Common.WpfPoint(cubicBezierSeg.B(3)), true, false);
}
else
{
var ls = iCurve as MLineSegment;
if (ls != null)
{
context.LineTo(Common.WpfPoint(ls.End), true, false);
}
else
{
var rr = iCurve as RoundedRect;
if (rr != null)
{
FillContexForCurve(context, rr.Curve);
}
else
{
var poly = iCurve as MPolyline;
if (poly != null)
{
FillContexForPolyline(context, poly);
}
else
{
var ellipse = iCurve as MEllipse;
if (ellipse != null)
{
double sweepAngle = EllipseSweepAngle(ellipse);
bool largeArc = Math.Abs(sweepAngle) >= Math.PI;
MRectangle box = ellipse.FullBox();
context.ArcTo(Common.WpfPoint(ellipse.End),
new WSize(box.Width / 2, box.Height / 2),
sweepAngle,
largeArc,
sweepAngle < 0
? WSweepDirection.Counterclockwise
: WSweepDirection.Clockwise,
true, true);
}
else
{
throw new NotImplementedException();
}
}
}
}
}
}
}
public override void AddShape(WpfPoint point, WpfStreamGeometryContext sgc)
{
var start = new WpfPoint(point.X, point.Y - Size * 0.5);
sgc.BeginFigure(start, true, true);
sgc.ArcTo(start, new Size(Size, Size), 360, true, WpfSweepDirection.Clockwise, true, true);
}
