我正在尝试使用 JUNG 在树布局中布置一些节点，但希望以整齐的间距布置它们，类似于 -
我已经从https://github.com/jrtom/jung下载了 JUNG 项目，并找到了 edu.uci.ics.jung.samples.TreeLayoutDemo 和 edu.uci.ics.jung.samples.GraphFromGraphMLDemo 的示例，但仍然难以达到我所追求的。
GraphML 文件内容看起来像 -
<?xml version="1.0" encoding="UTF-8"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd">
<graph id="G" edgedefault="undirected">
<node id="n0" />
<node id="n1" />
<node id="n2" />
<node id="n3" />
<node id="n4" />
<node id="n5" />
<node id="n6" />
<node id="n7" />
<node id="n8" />
<node id="n9" />
<node id="n10" />
<edge source="n0" target="n2" />
<edge source="n1" target="n2" />
<edge source="n2" target="n3" />
<edge source="n3" target="n5" />
<edge source="n3" target="n4" />
<edge source="n4" target="n6" />
<edge source="n6" target="n5" />
<edge source="n5" target="n7" />
<edge source="n6" target="n8" />
<edge source="n8" target="n7" />
<edge source="n8" target="n9" />
<edge source="n8" target="n10" />
</graph>
</graphml>
我已经能够生成树布局。
private Supplier<MutableNetwork<Number, Number>> graphFactory;
private Supplier<Number> nodeFactory;
private Supplier<Number> edgeFactory;
private GraphMLReader<MutableNetwork<Number, Number>, Number, Number> gmlreader;
private void initializeTools() throws ParserConfigurationException, SAXException {
graphFactory =
() -> NetworkBuilder.directed()
.allowsSelfLoops(true)
.allowsParallelEdges(true)
.build();
nodeFactory =
new Supplier<Number>() {
int n = 0;
public Number get() {
return n++;
}
};
edgeFactory =
new Supplier<Number>() {
int n = 0;
public Number get() {
return n++;
}
};
gmlreader =
new GraphMLReader<>(nodeFactory, edgeFactory);
}
private MutableNetwork<Number, Number> getGraph() {
MutableNetwork<Number, Number> graph = null;
String xml =
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+ "<graphml xmlns=\"http://graphml.graphdrawing.org/xmlns\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" "
+ "xsi:schemaLocation=\"http://graphml.graphdrawing.org/xmlns http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd\">"
+ " <graph id=\"G\" edgedefault=\"undirected\">\n" +
" <node id=\"n0\" />\n" +
" <node id=\"n1\" />\n" +
" <node id=\"n2\" />\n" +
" <node id=\"n3\" />\n" +
" <node id=\"n4\" />\n" +
" <node id=\"n5\" />\n" +
" <node id=\"n6\" />\n" +
" <node id=\"n7\" />\n" +
" <node id=\"n8\" />\n" +
" <node id=\"n9\" />\n" +
" <node id=\"n10\" />\n" +
" <edge source=\"n0\" target=\"n2\" />\n" +
" <edge source=\"n1\" target=\"n2\" />\n" +
" <edge source=\"n2\" target=\"n3\" />\n" +
" <edge source=\"n3\" target=\"n5\" />\n" +
" <edge source=\"n3\" target=\"n4\" />\n" +
" <edge source=\"n4\" target=\"n6\" />\n" +
" <edge source=\"n6\" target=\"n5\" />\n" +
" <edge source=\"n5\" target=\"n7\" />\n" +
" <edge source=\"n6\" target=\"n8\" />\n" +
" <edge source=\"n8\" target=\"n7\" />\n" +
" <edge source=\"n8\" target=\"n9\" />\n" +
" <edge source=\"n8\" target=\"n10\" />\n" +
" </graph>" +
"</graphml>";
BufferedWriter writer = null;
try {
writer = new BufferedWriter(new FileWriter("temp.graphml"));
writer.write(xml);
writer.close();
graph = graphFactory.get();
gmlreader.load("temp.graphml", graph);
} catch (Exception e) {
e.printStackTrace();
}
return graph;
}
照这样使用——
initializeTools();
final MutableNetwork<Number, Number> graph = getGraph();
// create a simple graph for the demo
TreeLayoutAlgorithm<Number> layoutAlgorithm = new TreeLayoutAlgorithm<>();
vv = new VisualizationViewer<>(graph, layoutAlgorithm, new Dimension(800, 800));
我无法让它完全说明我期望或正在尝试的方式。这就是它的外观 -默认树布局
