protected void PaintEdge(Graphics g, LayoutGraph graph, Edge e)
{
IEdgeLayout el = graph.GetLayout(e);
YPoint sp = graph.GetSourcePointAbs(e);
YPoint tp = graph.GetTargetPointAbs(e);
PointF[] points = new PointF[el.PointCount() + 2];
points[0] = new PointF((float)sp.X, (float)sp.Y);
points[el.PointCount() + 1] = new PointF((float)tp.X, (float)tp.Y);
for (int i = 0; i < el.PointCount(); i++)
{
YPoint p = el.GetPoint(i);
points[i + 1] = new PointF((float)p.X, (float)p.Y);
}
g.DrawLines(edgePen, points);
}
/// <summary>
/// Called by the various edge creation callbacks to create an edge in the resulting graph view
/// that corresponds to the provided <paramref name="layoutEdge"/>.
/// </summary>
/// <remarks>
/// If a model edge is provided, the edge will be created between the copies of the corresponding
/// source/target ports.
/// </remarks>
///<param name="pageLayoutGraph">The layout graph representing the current page.</param>
///<param name="pageView">The <see cref="IGraph"/> that is built to show the multi-page layout in a graph canvas.</param>
///<param name="layoutEdge">The edge of the layout graph that should be copied.</param>
///<param name="modelEdge">The edge of the original input graph that corresponds to the <paramref name="layoutEdge"/> (may be <see langword="null"/>).</param>
///<param name="edgeDefaults"></param>
///<returns>The created edge</returns>
/// <seealso cref="CreateConnectorEdge"/>
/// <seealso cref="CreateNormalEdge"/>
/// <seealso cref="CreateProxyEdge"/>
/// <seealso cref="CreateProxyReferenceEdge"/>
protected IEdge CreateEdgeCore(LayoutGraph pageLayoutGraph, IGraph pageView, Edge layoutEdge, IEdge modelEdge, IEdgeDefaults edgeDefaults)
{
IEdge viewEdge;
if (modelEdge != null)
{
// if the edge has a model edge: create the copied edge between
// the copies of its source and target ports
IPort modelSourcePort = modelEdge.SourcePort;
IPort modelTargetPort = modelEdge.TargetPort;
IPort viewSourcePort = GetViewPort(modelSourcePort);
IPort viewTargetPort = GetViewPort(modelTargetPort);
IEdgeStyle style = (IEdgeStyle)(edgeDefaults.Style != NullEdgeStyle ?
edgeDefaults.GetStyleInstance() :
modelEdge.Style.Clone());
viewEdge = pageView.CreateEdge(viewSourcePort, viewTargetPort, style, modelEdge.Tag);
}
else
{
// otherwise create it between the copies of its source and target nodes
INode viewSource = GetViewNode(layoutEdge.Source);
INode viewTarget = GetViewNode(layoutEdge.Target);
viewEdge = pageView.CreateEdge(viewSource, viewTarget);
}
// adjust the port location
YPoint newSourcePortLocation = pageLayoutGraph.GetSourcePointAbs(layoutEdge);
YPoint newTargetPortLocation = pageLayoutGraph.GetTargetPointAbs(layoutEdge);
pageView.SetPortLocation(viewEdge.SourcePort, newSourcePortLocation.ToPointD());
pageView.SetPortLocation(viewEdge.TargetPort, newTargetPortLocation.ToPointD());
// and copy the bends
IEdgeLayout edgeLayout = pageLayoutGraph.GetLayout(layoutEdge);
for (int i = 0; i < edgeLayout.PointCount(); i++)
{
YPoint bendLocation = edgeLayout.GetPoint(i);
pageView.AddBend(viewEdge, new PointD(bendLocation.X, bendLocation.Y), i);
}
return(viewEdge);
}
public GraphCanvas(LayoutGraph graph)
{
this.RenderTransform = new TranslateTransform(_padding, _padding);
var grouping = new GroupingSupport(graph);
// Add all edges
foreach (var edge in graph.Edges)
{
IEdgeLayout el = graph.GetLayout(edge);
var l = new Polyline();
l.Stroke = Brushes.Black;
l.Points.Add(new Point(graph.GetSourcePointAbs(edge).X, graph.GetSourcePointAbs(edge).Y));
for (int i = 0; i < el.PointCount(); i++)
{
Point p = new Point(el.GetPoint(i).X, el.GetPoint(i).Y);
l.Points.Add(p);
}
l.Points.Add(new Point(graph.GetTargetPointAbs(edge).X, graph.GetTargetPointAbs(edge).Y));
this.Children.Add(l);
// edge labels
var edgeLabelLayout = graph.GetLabelLayout(edge);
foreach (var labelLayout in edgeLabelLayout)
{
var orientedRectangle = labelLayout.LabelModel.GetLabelPlacement(
labelLayout.BoundingBox,
graph.GetLayout(edge),
graph.GetLayout(edge.Source),
graph.GetLayout(edge.Target),
labelLayout.ModelParameter);
this.Children.Add(GetPolygon(orientedRectangle));
}
}
// add all nodes
foreach (var node in graph.Nodes)
{
INodeLayout nl = graph.GetLayout(node);
Color color = grouping.IsGroupNode(node) ? Color.FromArgb(60, 255, 60, 0) : Color.FromArgb(255, 255, 255, 0);
var rect = new Rectangle();
this.Children.Add(rect);
rect.Stroke = new SolidColorBrush()
{
Color = Colors.Black
};
rect.Fill = new SolidColorBrush()
{
Color = color
};
rect.Width = nl.Width;
rect.Height = nl.Height;
Canvas.SetTop(rect, nl.Y);
Canvas.SetLeft(rect, nl.X);
// display the node index
var text = new TextBlock()
{
Text = String.Empty + node.Index,
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center
};
this.Children.Add(text);
text.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
Canvas.SetTop(text, nl.Y + nl.Height / 2 - text.DesiredSize.Height / 2);
Canvas.SetLeft(text, nl.X + nl.Width / 2 - text.DesiredSize.Width / 2);
}
}
public override void ApplyLayout(LayoutGraph graph)
{
ApplyLayoutCore(graph);
foreach (Node n in graph.Nodes)
{
foreach (Edge e in n.OutEdges)
{
bool lastSegmentOverlap = false;
IEdgeLayout er = graph.GetLayout(e);
if (er.PointCount() > 0)
{
// last bend point
YPoint bendPoint = er.GetPoint(er.PointCount() - 1);
IEnumerator <Edge> ecc = n.OutEdges.GetEnumerator();
loop : while (ecc.MoveNext())
{
Edge eccEdge = ecc.Current;
if (eccEdge != e)
{
YPointPath path = graph.GetPath(eccEdge);
for (ILineSegmentCursor lc = path.LineSegments(); lc.Ok; lc.Next())
{
LineSegment seg = lc.LineSegment;
if (seg.Contains(bendPoint))
{
lastSegmentOverlap = true;
goto loop;
}
}
}
}
}
YList points = graph.GetPointList(e);
for (ListCell c = points.FirstCell; c != null; c = c.Succ())
{
YPoint p = (YPoint)c.Info;
if (c.Succ() == null && !lastSegmentOverlap)
{
break;
}
YPoint p0 = (YPoint)(c.Pred() == null ? graph.GetSourcePointAbs(e) : c.Pred().Info);
YPoint p2;
if (Math.Abs(p0.X - p.X) < 0.01)
{
p2 = new YPoint(p.X, p.Y - 0.001);
}
else
{
p2 = new YPoint(p.X - 0.001, p.Y);
}
points.InsertBefore(p2, c);
}
graph.SetPoints(e, points);
}
}
}