CODEWITHSUNDEEP
javajung
Glory to Russia
Glory to Russia

Reputation: 18710

JUNG layout question

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

enter image description here

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

enter image description here

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:

enter image description here

Upvotes: 3

Views: 7833

Answers (3)

Joshua O&#39;Madadhain
Joshua O&#39;Madadhain

Reputation: 2704

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

Upvotes: 4

eee
eee

Reputation: 1053

Ok...Now, I understand what you really want to solve. Dmitri, you can check another JUNG example, L2RTreeLayoutDemo.class...it looks so close to what you want to achieve.

Or, you can study SO post below: Can Jung graphics appear in the same place every time?

Upvotes: 1

eee
eee

Reputation: 1053

It has to do with how you create your vertices and edges in JUNG.

For a headstart, I suggest you to refer to createVertices() and createEdges() methods in the JUNG example WorldMapGraphDemo.class in edu.uci.ics.jung.samples package under the jung-samples-2.0.1.jar from your JUNG 2.0 Framework library.

The approach used in the methods are clearer compared to other provided examples where it uses the Map objects to store user-defined vertices and edges information. The rest uses random-generated, library-generated or file-generated information.

Once it is clear to you, you can refer to PluggableRendererDemo.class to improve your graph (like decorating Transformer and Renderer classes under respective packages edu.uci.ics.jung.visualization.decorators and edu.uci.ics.jung.visualization.renderers for decorating and rendering vertex, edge, direction arrow, shape, size, etc.)

Upvotes: 1

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