public Drawing.LineSegment GetConnectionLine(ParentChildConnection <Node <T> > connection)
{
var parent_rect = connection.Parent.Rect;
var child_rect = connection.Child.Rect;
double parent_x, parent_y;
double child_x, child_y;
if (TreeLayout <T> .IsVertical(this.Options.Direction))
{
parent_x = parent_rect.Center.X;
child_x = child_rect.Center.X;
parent_y = TreeLayout <T> .GetSide(parent_rect, this.Options.Direction);
child_y = TreeLayout <T> .GetSide(child_rect, TreeLayout <T> .GetOpposite(this.Options.Direction));
}
else
{
var parent_dir = this.Options.Direction;
var child_dir = TreeLayout <T> .GetOpposite(parent_dir);
parent_x = TreeLayout <T> .GetSide(parent_rect, parent_dir);
child_x = TreeLayout <T> .GetSide(child_rect, child_dir);
parent_y = parent_rect.Center.Y;
child_y = child_rect.Center.Y;
}
var parent_attach_point = new Drawing.Point(parent_x, parent_y);
var child_attach_point = new Drawing.Point(child_x, child_y);
return(new Drawing.LineSegment(parent_attach_point, child_attach_point));
}
public Drawing.Point[] GetConnectionPolyline(ParentChildConnection <Node <T> > connection)
{
var lineseg = this.GetConnectionLine(connection);
Drawing.Point m0, m1;
var parent_attach_point = lineseg.Start;
var child_attach_point = lineseg.End;
var dif = lineseg.End - lineseg.Start;
var a = (this.Options.LevelSeparation / 2.0);
var b = (this.Options.LevelSeparation / 2.0);
if (TreeLayout <T> .IsVertical(this.Options.Direction))
{
if (this.Options.Direction == LayoutDirection.Up)
{
b = -b;
}
m0 = new Drawing.Point(lineseg.Start.X, lineseg.End.Y + b);
m1 = new Drawing.Point(lineseg.End.X, lineseg.End.Y + b);
}
else
{
if (this.Options.Direction == LayoutDirection.Left)
{
a = -a;
}
m0 = new Drawing.Point(lineseg.End.X - a, lineseg.Start.Y);
m1 = new Drawing.Point(lineseg.End.X - a, lineseg.End.Y);
}
return(new[] { lineseg.Start, m0, m1, lineseg.End });
}
public IEnumerable <ParentChildConnection <Node <T> > > EnumConnections()
{
foreach (var parent in this.Nodes)
{
foreach (var child in parent.EnumChildren())
{
var connection = new ParentChildConnection <Node <T> >(parent, child);
yield return(connection);
}
}
}
public Drawing.Point[] GetConnectionBezier(ParentChildConnection <Node <T> > connection)
{
var lineseg = this.GetConnectionLine(connection);
var parent_attach_point = lineseg.Start;
var child_attach_point = lineseg.End;
double scale = this.Options.LevelSeparation / 2.0;
var dif = child_attach_point.Subtract(parent_attach_point).Multiply(scale);
var handle_displacement = TreeLayout <T> .IsVertical(this.Options.Direction)
? new Drawing.Point(0, dif.Y)
: new Drawing.Point(dif.X, 0);
var h1 = parent_attach_point.Add(handle_displacement);
var h2 = child_attach_point.Add(handle_displacement * (-1));
return(new[] { parent_attach_point, h1, h2, child_attach_point });
}
