private void DrawBezier()
{
if (point1.Parent == null || point2.Parent == null)
{
return;
}
if (!point1.HasAncestor(view) || !point2.HasAncestor(view))
{
return;
}
Point r1 = point1.TransformToAncestor(view).Transform(new Point(point1.ActualWidth, 8f));
Point r2 = point2.TransformToAncestor(view).Transform(new Point(0f, 8f));
double dy = r2.Y - r1.Y;
Point mid = new Point((r2.X + r1.X) * 0.5f, (r2.Y + r1.Y) * 0.5f + dy * 0.5f);
if (path != null)
{
if (selected)
{
path.Stroke = RedColor;
}
else
{
path.Stroke = point1.ColorBrush;
}
path.IsHitTestVisible = false;
Canvas.SetZIndex(path, -1);
if (path.Data == null || lastType != type)
{
lastType = type;
InitBezier(ref r1, ref mid, ref r2);
}
else
{
PathGeometry p = (PathGeometry)path.Data;
PathFigure pf = p.Figures[0];
pf.StartPoint = r1;
if (pf.Segments.Count > 1)
{
InitBezier(ref r1, ref mid, ref r2);
}
else if (pf.Segments[0] is BezierSegment)
{
BezierSegment seg = (BezierSegment)pf.Segments[0];
seg.Point1 = r1;
seg.Point2 = mid;
seg.Point3 = r2;
}
else
{
InitBezier(ref r1, ref mid, ref r2);
}
}
}
if (num != null)
{
Point p = CatmullRomSpline.GetPointOnBezierCurve(r1, mid, r2, 0.5f);
num.Text = (point1.GetOutIndex(point2) + 1).ToString();
num.IsHitTestVisible = false;
Canvas.SetZIndex(num, -1);
Canvas.SetLeft(num, p.X);
Canvas.SetTop(num, p.Y);
}
}
static NodePath()
{
lastType = type = NodePathType.Line;
}
private void DrawLines()
{
if (point1.Parent == null || point2.Parent == null)
{
return;
}
if (!point1.HasAncestor(view) || !point2.HasAncestor(view))
{
return;
}
Point r1 = point1.TransformToAncestor(view).Transform(new Point(point1.ActualWidth, 8f));
Point r2 = point2.TransformToAncestor(view).Transform(new Point(0f, 8f));
double midy = (r2.Y + r1.Y) * 0.5;
double midx = (r2.X + r1.X) * 0.5;
///calculate distance
double diffx = r2.X - r1.X;
diffx *= diffx;
double diffy = r2.Y - r1.Y;
diffy *= diffy;
double dist = Math.Sqrt(diffx + diffy);
///
double distExtra = dist * 0.05;
double r1Extra = distExtra;
double r2Extra = -distExtra;
double r1y = midy;
double r2y = midy;
if (path != null)
{
if (selected)
{
path.Stroke = RedColor;
}
else
{
path.Stroke = point1.ColorBrush;
}
path.IsHitTestVisible = false;
Canvas.SetZIndex(path, -1);
if (path.Data == null || lastType != type)
{
lastType = type;
InitLines(ref r1, r1Extra, r1y, r2Extra, r2y, ref r2);
}
else
{
PathGeometry p = (PathGeometry)path.Data;
PathFigure pf = p.Figures[0];
pf.StartPoint = r1;
if (pf.Segments.Count < 5)
{
InitLines(ref r1, r1Extra, r1y, r2Extra, r2y, ref r2);
}
else if (pf.Segments[0] is LineSegment && pf.Segments[1] is LineSegment &&
pf.Segments[2] is LineSegment && pf.Segments[3] is LineSegment &&
pf.Segments[4] is LineSegment)
{
LineSegment seg = (LineSegment)pf.Segments[0];
seg.Point = new Point(r1Extra * 0.5 + r1.X, r1.Y);
LineSegment seg2 = (LineSegment)pf.Segments[1];
seg2.Point = new Point(r1Extra + r1.X, r1y);
LineSegment seg3 = (LineSegment)pf.Segments[2];
seg3.Point = new Point(r2Extra + r2.X, r2y);
LineSegment seg4 = (LineSegment)pf.Segments[3];
seg4.Point = new Point(r2Extra * 0.5 + r2.X, r2.Y);
LineSegment seg5 = (LineSegment)pf.Segments[4];
seg5.Point = r2;
}
else
{
InitLines(ref r1, r1Extra, r1y, r2Extra, r2y, ref r2);
}
}
}
if (num != null)
{
Point p = new Point(midx, midy);
num.Text = (point1.GetOutIndex(point2) + 1).ToString();
num.IsHitTestVisible = false;
Canvas.SetZIndex(num, -1);
Canvas.SetLeft(num, p.X);
Canvas.SetTop(num, p.Y);
}
}