/// <summary>
/// Removes all edges that are incident to group nodes and passes it to the core layout algorithm.
/// </summary>
/// <remarks>
/// This stage removes some edges from the graph such that no edges incident to group nodes
/// exist. Then, it applies the core layout algorithm to the reduced graph.
/// After it produces the result, it re-inserts the previously removed edges and routes them.
/// </remarks>
public override void ApplyLayout(LayoutGraph graph) {
var groupingSupport = new yWorks.Layout.Grouping.GroupingSupport(graph);
if (!GroupingSupport.IsGrouped(graph)) {
ApplyLayoutCore(graph);
} else {
var hiddenEdgesMap = Maps.CreateHashedEdgeMap();
var edgeHider = new LayoutGraphHider(graph);
var existHiddenEdges = false;
foreach (var edge in graph.Edges) {
if (groupingSupport.IsGroupNode(edge.Source) || groupingSupport.IsGroupNode(edge.Target)) {
hiddenEdgesMap.Set(edge, true);
edgeHider.Hide(edge);
existHiddenEdges = true;
} else {
hiddenEdgesMap.Set(edge, false);
}
}
ApplyLayoutCore(graph);
if (existHiddenEdges) {
edgeHider.UnhideAll();
// routes the marked edges
RouteMarkedEdges(graph, hiddenEdgesMap);
if (ConsiderEdgeLabels) {
// all labels of hidden edges should be marked
var affectedLabelsDpKey = "affectedLabelsDpKey";
var nonTreeLabelsMap = Maps.CreateHashedDataMap();
foreach (var edge in graph.Edges) {
var ell = graph.GetLabelLayout(edge);
foreach (var labelLayout in ell) {
nonTreeLabelsMap.Set(labelLayout, hiddenEdgesMap.Get(edge));
}
}
// add selection marker
graph.AddDataProvider(affectedLabelsDpKey, nonTreeLabelsMap);
// place marked labels
var labeling = new GenericLabeling {
PlaceNodeLabels = false,
PlaceEdgeLabels = true,
AffectedLabelsDpKey = affectedLabelsDpKey,
};
labeling.ApplyLayout(graph);
// dispose selection key
graph.RemoveDataProvider(affectedLabelsDpKey);
}
}
}
}
public override bool GetBool(object dataHolder)
{
if (dataHolder is INodeLabelLayout)
{
var node = layoutGraph.GetOwner((INodeLabelLayout)dataHolder);
if (layoutGraph is CopiedLayoutGraph)
{
bool[] selectedLabels = selectedLabelsAtItemProvider.Get(node) as bool[];
if (selectedLabels != null)
{
var nodeLabelLayouts = layoutGraph.GetLabelLayout(node);
for (int i = 0; i < nodeLabelLayouts.Length; i++)
{
var nodeLabelLayout = nodeLabelLayouts[i];
if (nodeLabelLayout == dataHolder && selectedLabels.Length > i)
{
return(selectedLabels[i]);
}
}
}
}
}
else if (dataHolder is IEdgeLabelLayout)
{
var edge = layoutGraph.GetOwner((IEdgeLabelLayout)dataHolder);
if (layoutGraph is CopiedLayoutGraph)
{
bool[] selectedLabels = selectedLabelsAtItemProvider.Get(edge) as bool[];
if (selectedLabels != null)
{
var edgeLabelLayouts = layoutGraph.GetLabelLayout(edge);
for (int i = 0; i < edgeLabelLayouts.Length; i++)
{
var edgeLabelLayout = edgeLabelLayouts[i];
if (edgeLabelLayout == dataHolder && selectedLabels.Length > i)
{
return(selectedLabels[i]);
}
}
}
}
}
return(false);
}
/// <summary>
/// Copy all labels of the given edge.
/// </summary>
private void CopyEdgeLabels(LayoutGraph pageLayoutGraph, IGraph pageView, Edge layoutEdge, IEdge copiedEdge, IEdge modelEdge, ILabelDefaults labelDefaults)
{
IEdgeLabelLayout[] edgeLabels = pageLayoutGraph.GetLabelLayout(layoutEdge);
for (int i = 0; i < edgeLabels.Length; i++)
{
// get the label layout from the layout graph
IEdgeLabelLayout edgeLabelLayout = edgeLabels[i];
// get the original label from the model graph
ILabel edgeModelLabel = modelEdge.Labels[i];
CopyEdgeLabel(pageView, edgeLabelLayout, edgeModelLabel, copiedEdge, labelDefaults);
}
}
/// <summary>
/// Copy all labels of the given node.
/// </summary>
private void CopyNodeLabels(LayoutGraph pageLayoutGraph, IGraph pageView, Node layoutNode, INode copiedNode, INode modelNode)
{
INodeLabelLayout[] nodeLabels = pageLayoutGraph.GetLabelLayout(layoutNode);
// for each label
for (int i = 0; i < nodeLabels.Length; i++)
{
// get the layout from the layout graph
INodeLabelLayout nodeLabelLayout = nodeLabels[i];
// get the original label from the model graph
ILabel nodeModelLabel = modelNode.Labels[i];
CopyNodeLabel(pageView, nodeLabelLayout, nodeModelLabel, layoutNode, copiedNode);
}
}
public void PaintGraph(Graphics g)
{
if (this.grouping != null)
{
for (ListCell cell = this.grouping.GetChildren(this.grouping.Root).FirstCell; cell != null; cell = cell.Succ())
{
Node node = (Node)cell.Info;
PaintNodeAndChildren(g, layoutGraph, node);
}
}
else
{
foreach (Node node in layoutGraph.Nodes)
{
PaintNode(g, layoutGraph, node);
INodeLabelLayout[] labels = layoutGraph.GetLabelLayout(node);
if (labels != null && labels.Length > 0)
{
foreach (INodeLabelLayout label in labels)
{
PaintNodeLabel(g, layoutGraph, node, label);
}
}
}
}
foreach (Edge edge in layoutGraph.Edges)
{
PaintEdge(g, layoutGraph, edge);
IEdgeLabelLayout[] labels = layoutGraph.GetLabelLayout(edge);
if (labels != null && labels.Length > 0)
{
foreach (IEdgeLabelLayout label in labels)
{
PaintEdgeLabel(g, layoutGraph, edge, label);
}
}
}
}
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);
}
}