public void VisitArc(Arc arc)
{
var nr = dp.NodeRadius;
var ars = dp.ArcArrowSize/2;
var startPoint = converter.ToDisplayCoord(arc.StartNode.Point);
var endPoint = converter.ToDisplayCoord(arc.EndNode.Point);
var pen = alternatePen.ContainsKey(arc) ?
alternatePen[arc] : dp.ArcPen;
var tmp = getOrthogonalBase(endPoint.X - startPoint.X,
endPoint.Y - startPoint.Y);
var x = startPoint.X;
var y = startPoint.Y;
var c = tmp.Item1;
var s = tmp.Item2;
var d = tmp.Item3;
var spx = (float)Math.Round(x + nr / 2 * c);
var spy = (float)Math.Round(y + nr / 2 * s);
var epx = (float)Math.Round(x + (d - nr / 2) * c);
var epy = (float)Math.Round(y + (d - nr / 2) * s);
var off = Math.Sqrt(3.0) * ars;
graphics.DrawLine(pen, spx, spy, epx, epy);
var epxc = (float)(epx - off * c);
var epyc = (float)(epy - off * s);
if (arc.Directed)
{
graphics.FillPolygon(pen.Brush, new PointF[] {
new PointF(epx, epy),
new PointF((float)(epxc - ars*s), (float)(epyc + ars*c)),
new PointF((float)(epxc + ars*s), (float)(epyc - ars*c)),
});
}
var middle = new Point((startPoint.X + endPoint.X) / 2,
(startPoint.Y + endPoint.Y) / 2);
graphics.DrawString(arc.Name, dp.LabelFont,
dp.LabelBrush, middle);
}
public ArcSpecificsEditor(GraphObjectEditor parent, Arc arc)
{
this.parent = parent;
this.arc = arc;
}
