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);
}
static internal void DragEdgeWithTarget(Point delta, GeomEdge edge, EdgeRestoreData edgeRestoreData)
{
double closenessToLine = Math.Min(1.0, (delta.Length / edgeRestoreData.DistanceWhenEdgeIsTurningToLine));
Point lineStart = edgeRestoreData.Polyline.HeadSite.Point;
Point lineEnd = edgeRestoreData.Polyline.LastSite.Point + delta;
edge.UnderlyingPolyline.LastSite.Point = lineEnd;
Point lineVectorBetweenToPolylinePoints = (lineEnd - lineStart) / edgeRestoreData.NumberOfPolylineSegments;
Site liveSite = edge.UnderlyingPolyline.HeadSite;
Site restoreSite = edgeRestoreData.Polyline.HeadSite;
for (int i = 1; i < edgeRestoreData.NumberOfPolylineSegments; i++)
{
Point linePoint = lineStart + ((double)i) * lineVectorBetweenToPolylinePoints;
liveSite = liveSite.Next;
restoreSite = restoreSite.Next;
liveSite.Point = closenessToLine * linePoint + (1 - closenessToLine) * restoreSite.Point;
}
CreateCurveOnChangedPolyline(delta, edge, edgeRestoreData);
}
/// <summary>
/// redoes the editing
/// </summary>
public override void Redo()
{
EdgeRestoreData erd = (EdgeRestoreData)GetRestoreData(editedEdge);
GeometryGraphEditor.DragEdgeWithSite(Delta, editedEdge, erd, erd.Site, erd.InitialSitePosition);
}
/// <summary>
/// undoes the editing
/// </summary>
public override void Undo()
{
EdgeRestoreData erd = (EdgeRestoreData)GetRestoreData(editedEdge);
GeometryGraphEditor.DragEdgeWithSite(new Point(0, 0), editedEdge, erd, erd.Site, erd.InitialSitePosition);
}
/// <summary>
///
/// </summary>
/// <param name="delta">delta of the drag</param>
/// <param name="e">the modified edge</param>
/// <param name="edgeRestoreData"></param>
/// <param name="site"></param>
/// <param name="previousSitePosition"></param>
static internal void DragEdgeWithSite(Point delta, GeomEdge e, EdgeRestoreData edgeRestoreData, Site site, Point previousSitePosition)
{
site.Point = previousSitePosition + delta;
CreateCurveOnChangedPolyline(delta, e, edgeRestoreData);
}
