/// <summary>
/// Creates a small graph and applies a hierarchic group layout to it.
/// The output of the calculated coordinates will be displayed in the
/// console.
/// </summary>
public void Run()
{
DefaultLayoutGraph graph = new DefaultLayoutGraph();
//construct graph. assign sizes to nodes
Node v1 = graph.CreateNode();
graph.SetSize(v1, 30, 30);
Node v2 = graph.CreateNode();
graph.SetSize(v2, 30, 30);
Node v3 = graph.CreateNode();
graph.SetSize(v3, 30, 30);
Node v4 = graph.CreateNode();
graph.SetSize(v4, 30, 30);
Node groupNode = graph.CreateNode();
graph.SetSize(groupNode, 100, 100);
Edge e1 = graph.CreateEdge(v1, v2);
Edge e2 = graph.CreateEdge(v4, groupNode);
Edge e3 = graph.CreateEdge(v1, v3);
Edge e4 = graph.CreateEdge(v1, v1);
Edge e5 = graph.CreateEdge(v2, groupNode);
Edge e6 = graph.CreateEdge(groupNode, v2);
//optionally setup some edge groups
IEdgeMap spg = graph.CreateEdgeMap();
IEdgeMap tpg = graph.CreateEdgeMap();
graph.AddDataProvider(PortConstraintKeys.SourceGroupIdDpKey, spg);
graph.AddDataProvider(PortConstraintKeys.TargetGroupIdDpKey, tpg);
spg.Set(e1, "SGroup1");
spg.Set(e3, "SGroup1");
tpg.Set(e1, "TGroup1");
tpg.Set(e3, "TGroup1");
//optionally setup the node grouping
INodeMap nodeId = graph.CreateNodeMap();
INodeMap parentNodeId = graph.CreateNodeMap();
INodeMap groupKey = graph.CreateNodeMap();
graph.AddDataProvider(GroupingKeys.NodeIdDpKey, nodeId);
graph.AddDataProvider(GroupingKeys.ParentNodeIdDpKey, parentNodeId);
graph.AddDataProvider(GroupingKeys.GroupDpKey, groupKey);
//mark a node as a group node
groupKey.SetBool(groupNode, true);
// add ids for each node
nodeId.Set(v1, "v1");
nodeId.Set(v2, "v2");
nodeId.Set(v3, "v3");
nodeId.Set(v4, "v4");
nodeId.Set(groupNode, "groupNode");
// set the parent for each grouped node
parentNodeId.Set(v2, "groupNode");
parentNodeId.Set(v3, "groupNode");
HierarchicLayout layout = new HierarchicLayout();
layout.MinimumLayerDistance = 0;
layout.EdgeLayoutDescriptor.MinimumDistance = 10;
new BufferedLayout(layout).ApplyLayout(graph);
Console.WriteLine("\n\nGRAPH LAID OUT USING HIERARCHICLAYOUT");
Console.WriteLine("v1 center position = " + graph.GetCenter(v1));
Console.WriteLine("v2 center position = " + graph.GetCenter(v2));
Console.WriteLine("v3 center position = " + graph.GetCenter(v3));
Console.WriteLine("v4 center position = " + graph.GetCenter(v4));
Console.WriteLine("group center position = " + graph.GetCenter(groupNode));
Console.WriteLine("group size = " + graph.GetSize(groupNode));
Console.WriteLine("e1 path = " + graph.GetPath(e1));
Console.WriteLine("e2 path = " + graph.GetPath(e2));
Console.WriteLine("e3 path = " + graph.GetPath(e3));
Console.WriteLine("e4 path = " + graph.GetPath(e4));
Console.WriteLine("e5 path = " + graph.GetPath(e5));
Console.WriteLine("e6 path = " + graph.GetPath(e4));
//display the result in a simple viewer
Application.Run(new Demo.yWorks.LayoutGraphViewer.GraphViewer(graph, "Hierarchical Group Layout"));
}