Question

I have some graph, which I want to display using JUNG2 like in the image below.

I’ve played with some layouts of JUNG2, but I’m always getting an image like this:

Is it possible to lay out the graph as I wish without writing a new layout?

Thanks in advance

Dmitri

UPD: Here is the code I used for visualizing the graph:

private Embedded createSampleGraph() {
Embedded imageComponent = null;

try {
    final DocumentBuilderFactory docBuilderFactory =
            DocumentBuilderFactory
                    .newInstance();
    final DocumentBuilder docBuilder =
            docBuilderFactory.newDocumentBuilder();
    final Document document = docBuilder.newDocument();
    final Element svgelem = document.createElement("svg");
    document.appendChild(svgelem);

    final SVGGraphics2D graphic2d = new SVGGraphics2D(document);

    final Graph<String, String> graph = createGraph();
    final VisualizationImageServer<String, String> server =
            createServer(graph);

    server.printAll(graphic2d);

    final Element el = graphic2d.getRoot();
    el.setAttributeNS(null, "viewBox", "0 0 350 350");
    el.setAttributeNS(null, "style", "width:100%;height:100%;");

    final ByteArrayOutputStream bout = new ByteArrayOutputStream();

    final Writer out = new OutputStreamWriter(bout, "UTF-8");
    graphic2d.stream(el, out);

    final JungResource source = new JungResource(bout);

    TPTApplication.getCurrentApplication().addResource(source);

    imageComponent = new Embedded("", source);

    imageComponent.setWidth(DEFAULT_WIDTH_PIXELS, UNITS_PIXELS);
    imageComponent.setHeight(DEFAULT_HEIGHT_PIXELS, UNITS_PIXELS);
    imageComponent.setMimeType("image/svg+xml");
    addComponent(imageComponent);
} catch (final UnsupportedEncodingException exception) {
    LOGGER.error(ErrorCodes.M_001_UNSUPPORTED_ENCONDING, exception);
} catch (final SVGGraphics2DIOException exception) {
    LOGGER.error(ErrorCodes.M_002_SVG_GRAPHICS_2D_IO, exception);
} catch (final ParserConfigurationException exception) {
    LOGGER.error(ErrorCodes.M_003_PARSER_CONFIGURATION, exception);
}
return imageComponent;
}

private VisualizationImageServer<String, String> createServer(
    final Graph<String, String> aGraph) {
final Layout<String, String> layout = new FRLayout<String, String>(
        aGraph);

layout.setSize(new Dimension(300, 300));
final VisualizationImageServer<String, String> vv =
        new VisualizationImageServer<String, String>(
                layout, new Dimension(350, 350));
vv.getRenderContext().setVertexLabelTransformer(
        new ToStringLabeller<String>());
return vv;
}

private Graph<String, String> createGraph() {
final Graph<String, String> graph =
        new DirectedSparseMultigraph<String, String>();
final String vertex1 = "IE";
final String vertex2 = "P1";
final String vertex3 = "P2";
final String vertex4 = "P3";
final String vertex5 = "FE";

graph.addVertex(vertex1);
graph.addVertex(vertex2);
graph.addVertex(vertex3);
graph.addVertex(vertex4);
graph.addVertex(vertex5);

graph.addEdge("1", vertex1, vertex2, EdgeType.DIRECTED);
graph.addEdge("2", vertex2, vertex3, EdgeType.DIRECTED);
graph.addEdge("3", vertex3, vertex5, EdgeType.DIRECTED);
graph.addEdge("4", vertex1, vertex4, EdgeType.DIRECTED);
graph.addEdge("5", vertex4, vertex5, EdgeType.DIRECTED);
return graph;
}

UPD 17.03.2011

Now I can draw a graph like this:

Answer 1

If you want to pin the locations of specific vertices, do the following for each one after creating the Layout and before adding it to the VisualizationViewer/VisualizationImageServer:

layout.setLocation(v, location);
layout.lock(v, true);

http://jung.sourceforge.net/doc/api/edu/uci/ics/jung/algorithms/layout/Layout.html