hierarchical.cpp

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#include <ogdf/fileformats/GraphIO.h>
#include <ogdf/layered/MedianHeuristic.h>
#include <ogdf/layered/OptimalHierarchyLayout.h>
#include <ogdf/layered/OptimalRanking.h>
#include <ogdf/layered/SugiyamaLayout.h>
 
using namespace ogdf;
 
int main()
{
    Graph G;
    GraphAttributes GA(G,
      GraphAttributes::nodeGraphics |
      GraphAttributes::edgeGraphics |
      GraphAttributes::nodeLabel |
      GraphAttributes::edgeStyle |
      GraphAttributes::nodeStyle |
      GraphAttributes::nodeTemplate);
    if (!GraphIO::read(GA, G, "unix-history.gml")) {
        std::cerr << "Could not load unix-history.gml" << std::endl;
        return 1;
    }
 
    SugiyamaLayout SL;
    SL.setRanking(new OptimalRanking);
    SL.setCrossMin(new MedianHeuristic);
 
    OptimalHierarchyLayout *ohl = new OptimalHierarchyLayout;
    ohl->layerDistance(30.0);
    ohl->nodeDistance(25.0);
    ohl->weightBalancing(0.8);
    SL.setLayout(ohl);
 
    SL.call(GA);
    GraphIO::write(GA, "output-unix-history-hierarchical.gml");
    GraphIO::write(GA, "output-unix-history-hierarchical.svg");
 
    return 0;
}