public void Draw(EdgeLayout layoutState)
{
var styleState = myPresentation.GetPropertySetFor <EdgeStyle>().Get(Owner.Id);
var label = myPresentation.GetPropertySetFor <Caption>().Get(Owner.Id);
var stream = new StreamGeometry();
var context = stream.Open();
context.BeginFigure(layoutState.Points.First(), false, false);
context.PolyBezierTo(layoutState.Points.Skip(1).ToList(), true, false);
// draw arrow head
{
var start = layoutState.Points.Last();
var v = start - layoutState.Points.ElementAt(layoutState.Points.Count() - 2);
v.Normalize();
start = start - v * 0.05;
context.BeginFigure(start + v * 0.18, true, true);
// Rotate 90°
double t = v.X;
v.X = v.Y;
v.Y = -t;
context.LineTo(start + v * 0.06, true, true);
context.LineTo(start + v * -0.06, true, true);
context.Close();
}
var pen = new Pen(styleState.Color, 1);
SetLineThickness(pen);
// http://stackoverflow.com/questions/1755520/improve-drawingvisual-renders-speed
Visual = new DrawingVisual();
var dc = Visual.RenderOpen();
dc.DrawGeometry(pen.Brush, pen, stream);
if (label.DisplayText != label.OwnerId)
{
var sourceLayoutState = myPresentation.GetModule <IGraphLayoutModule>().GetLayout(Owner.Source);
var tx = new FormattedText(label.DisplayText,
CultureInfo.InvariantCulture,
FlowDirection.LeftToRight,
myFont,
sourceLayoutState.Height * 0.5, Brushes.Black);
dc.DrawText(tx, new Point(layoutState.LabelPosition.X - tx.Width, layoutState.LabelPosition.Y - tx.Height));
}
dc.Close();
Visual.SetValue(GraphItemProperty, Owner);
}
internal bool OnDrawEdge(EdgeLayout edgeLayout, DrawingContext drawingContext)
{
if (DrawEdge != null)
{
DrawEdge(this, new DrawEdgeEventArgs(edgeLayout, drawingContext));
return(true);
}
return(false);
}
public EdgeLayout ReadEdgeLayout(string edgeId)
{
int pointCount = myReader.ReadInt();
var points = new List <Point>();
for (int i = 0; i < pointCount; ++i)
{
points.Add(ReadPoint());
}
var layout = new EdgeLayout(edgeId);
layout.Points = points;
return(layout);
}
/// <summary>
/// Computes the layout of the graph using Graphviz
/// </summary>
/// <remarks>
/// </remarks>
public void Compute()
{
StringWriter sw = new StringWriter();
sw.WriteLine("digraph G{");
sw.WriteLine("rankdir={0}", this.RankDirection);
foreach (IVertex v in this.VisitedGraph.Vertices)
{
if (this.vertexSizes.Count == 0)
{
sw.WriteLine("{0} [shape=box];", v.ID);
}
else
{
SizeF size = this.vertexSizes[v];
sw.WriteLine("{0} [shape=box, width={1}, height={2}, fixedsize=true];",
v.ID,
size.Width / this.DpiX,
size.Height / this.DpiY
);
}
}
foreach (IEdge e in this.VisitedGraph.Edges)
{
sw.WriteLine("{0} -> {1} [label=\"{2}\"];", e.Source.ID, e.Target.ID, e.ID);
}
sw.WriteLine("}");
System.Diagnostics.Debug.WriteLine(sw.ToString());
// running graphviz
NGraphviz.Helpers.Dot dot = new NGraphviz.Helpers.Dot(".");
GraphLayout gl = dot.RunData(sw.ToString());
// build vertex id map
OnGraphSize(gl.Size);
if (LayVertex != null)
{
foreach (IVertex v in this.VisitedGraph.Vertices)
{
VertexLayout vl = (VertexLayout)gl.Vertices[v.ID.ToString()];
OnLayVertex(v, vl.Pos);
}
}
if (LayEdge != null)
{
foreach (IEdge e in this.VisitedGraph.Edges)
{
EdgeLayout el = (EdgeLayout)gl.Edges[e.ID.ToString()];
OnLayEdge(
e,
ConvertEdgePort(el.SourcePort),
ConvertEdgePort(el.TargetPort),
el.Keys);
}
}
}
private void DrawEdge(EdgeLayout edge)
{
Pen pen = EdgeTemplate.DefaultPen;
Pen trianglePen = new Pen()
{
Brush = Brushes.Black, Thickness = 3.0
};
if (_view.EdgeTemplate.Count > 0)
{
foreach (var edgeTemplate in _view.EdgeTemplate)
{
if (edgeTemplate.EdgeType == null || edgeTemplate.EdgeType is System.Type type && type.IsAssignableFrom(edge.EdgeObject.GetType()))
{
//pen = edgeTemplate.Pen;
string objectName = (string)edge.EdgeObject;
if (objectName.Contains("--|>"))
{
pen = new Pen()
{
Brush = Brushes.Black, Thickness = 2.0
};
pen.DashStyle = DashStyles.Dash;
}
else if (objectName.Contains("-|>"))
{
pen = new Pen()
{
Brush = Brushes.Black, Thickness = 2.0
};
}
else if (objectName.Contains("-->"))
{
pen = new Pen()
{
Brush = Brushes.Black, Thickness = 2.0
};
pen.DashStyle = DashStyles.Dash;
}
else if (objectName.Contains("-"))
{
pen = new Pen()
{
Brush = Brushes.Black, Thickness = 2.0
};
}
break;
}
}
}
var visual = new DrawingVisual();
DrawingContext drawingContext = visual.RenderOpen();
if (!_view.OnDrawEdge(edge, drawingContext))
{
var path = new PathGeometry();
var heightOfTriangle = pen.Thickness * 10;
LineGeometry[] lines = calculateLinesForTriangle(edge.Splines.FirstOrDefault()[edge.Splines.FirstOrDefault().Length - 1], heightOfTriangle, edge.Splines.FirstOrDefault()[edge.Splines.FirstOrDefault().Length - 2]);
foreach (var spline in edge.Splines)
{
var pathFigure = new PathFigure();
pathFigure.IsClosed = false;
pathFigure.StartPoint = new Point(spline[0].X, spline[0].Y);
for (int i = 1; i < spline.Length; i += 3)
{
var segment = new BezierSegment(new Point(spline[i].X, spline[i].Y), new Point(spline[i + 1].X, spline[i + 1].Y), new Point(spline[i + 2].X, spline[i + 2].Y), true);
pathFigure.Segments.Add(segment);
}
path.Figures.Add(pathFigure);
}
drawingContext.DrawGeometry(null, pen, path);
if (((string)edge.EdgeObject).Contains("|>"))
{
for (int i = 0; i < 3; i++)
{
drawingContext.DrawGeometry(null, trianglePen, lines[i]);
}
}
else if (((string)edge.EdgeObject).Contains("-->"))
{
for (int i = 0; i < 2; i++)
{
drawingContext.DrawGeometry(null, trianglePen, lines[i]);
}
}
}
drawingContext.Close();
visual.SetValue(FrameworkElement.TagProperty, edge);
_visuals.Children.Add(visual);
}
public DrawEdgeEventArgs(EdgeLayout edgeLayout, DrawingContext drawingContext)
{
EdgeLayout = edgeLayout;
DrawingContext = drawingContext;
}