/// <summary>
/// Creates a GraphBuilder instance that's preconfigured with our demo's styles.
/// </summary>
internal static (GraphBuilder, NodesSource <INeo4jNode>, EdgesSource <IRelationship>) CreateGraphBuilder(GraphControl graphControl, IGraph graph, List <INeo4jNode> nodes, List <IRelationship> edges)
{
var builder = new GraphBuilder(graph);
var nodesSource = builder.CreateNodesSource(nodes, n => n.Id);
nodesSource.NodeCreator.TagProvider = n => n;
var nodeStyle = new NodeControlNodeStyle("NodeStyle");
nodesSource.NodeCreator.Defaults.Style = nodeStyle;
var edgesSource = builder.CreateEdgesSource(edges, e => e.StartNodeId, e => e.EndNodeId, e => e.Id);
edgesSource.EdgeCreator.Defaults.Style = new BezierEdgeStyle {
TargetArrow = Arrows.Default
};
var labelBinding = edgesSource.EdgeCreator.CreateLabelBinding(item => item.Type);
labelBinding.Defaults.LayoutParameter = new EdgeSegmentLabelModel().CreateParameterFromSource(0, 0, EdgeSides.AboveEdge);
var context = graphControl.CreateRenderContext();
builder.NodeCreated +=
(sender, e) => {
// Ensure that nodes have the correct size
e.Graph.SetNodeLayout(e.Item, RectD.FromCenter(e.Item.Layout.GetCenter(), nodeStyle.GetPreferredSize(context, e.Item)));
};
return(builder, nodesSource, edgesSource);
}