internal static void DragEdge(Point delta, GeomEdge e, EdgeRestoreData edgeRestoreData,
Set<GeometryObject> objectsMarkedToDrag) {
Site site = null;
if (objectsMarkedToDrag.Contains(e.Source)) {
if (!objectsMarkedToDrag.Contains(e.Target))
site = e.UnderlyingPolyline.HeadSite;
}
else
site = e.UnderlyingPolyline.LastSite;
if (site == null)
TranslateEdge(e, delta, edgeRestoreData);
else
DragEdgeWithSite(delta, e, site);
}
///// <summary>
///// Creates a curve by using the underlying polyline
///// </summary>
///// <param name="underlyingPoly"></param>
///// <returns></returns>
// [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Polyline")]
// static public Curve CreateCurveFromEdgeUnderlyingPolyline(UnderlyingPolyline underlyingPoly) {
// Curve curve = new Curve();
// Site a = underlyingPoly.HeadSite;//the corner start
// Site b; //the corner origin
// Site c;//the corner other end
// while (SmoothedPolyline.FindCorner(a, out b, out c)) {
// CubicBezierSegment seg = SmoothedPolyline.CreateBezierSeg(b.bezierSegmentShrinkCoefficient, a, b, c);
// if (curve.Segments.Count == 0) {
// if (!ApproximateComparer.Close(a.Point, seg.Start))
// Curve.AddLineSeg(curve, a.Point, seg.Start);
// } else if (!ApproximateComparer.Close(curve.End, seg.Start))
// Routing.ContinueWithLineSeg(curve, seg.Start);
// curve.AddSegment(seg);
// a = b;
// }
// System.Diagnostics.Debug.Assert(a.Next.Next == null);
// if (curve.Segments.Count == 0) {
// if (!ApproximateComparer.Close(a.Point, a.Next.Point)) {
// Curve.AddLineSeg(curve, a.Point, a.Next.Point);
// } else {
// double w=5;
// curve.Segments.Add(new CubicBezierSegment(a.Point, a.Point+new Point(w,w),a.Point+new Point(-w,w), b.Point));
// }
// } else if (!ApproximateComparer.Close(curve.End, a.Next.Point))
// Routing.ContinueWithLineSeg(curve, a.Next.Point);
// return curve;
// }
static void TranslateEdge(GeomEdge e, Point delta, EdgeRestoreData edgeRestoreData) {
if (edgeRestoreData.Curve != null) {
e.Curve = edgeRestoreData.Curve.Clone();
e.Curve.Translate(delta);
}
if (e.UnderlyingPolyline != null)
for (Site s = e.UnderlyingPolyline.HeadSite, s0 = edgeRestoreData.UnderlyingPolyline.HeadSite;
s != null;
s = s.Next, s0 = s0.Next)
s.Point = s0.Point + delta;
if (e.EdgeGeometry.SourceArrowhead != null)
e.EdgeGeometry.SourceArrowhead.TipPosition = edgeRestoreData.ArrowheadAtSourcePosition + delta;
if (e.EdgeGeometry.TargetArrowhead != null)
e.EdgeGeometry.TargetArrowhead.TipPosition = edgeRestoreData.ArrowheadAtTargetPosition + delta;
if (e.Label != null)
e.Label.Center = edgeRestoreData.LabelCenter + delta;
}
internal static ICurve CreateBaseSegmentForDraggingEdgeWithSource(Point delta, GeomEdge edge,
EdgeRestoreData edgeRestoreData,
Dictionary<GeomEdge, double> offsets) {
double offset;
ICurve seg;
Point a = edgeRestoreData.UnderlyingPolyline.HeadSite.Point + delta;
Point b = edgeRestoreData.UnderlyingPolyline.LastSite.Point;
if (offsets.TryGetValue(edge, out offset) && offset != 0) {
Point ab = b - a;
Point abOrtog = ab.Normalize().Rotate(Math.PI/2)*offset;
seg = CreateBaseSegOnSourceTargetAndOrth(ref a, ref b, ref abOrtog);
// SugiyamaLayoutSettings.Show(seg, edge.Curve, edge.Source.BoundaryCurve);
}
else
seg = new LineSegment(a, b);
return seg;
}