您可能正在寻找一个LabelRenderer. 在下面的示例中，aLabelRenderer的构造方式是呈现具有标签的节点GraphLib.LABEL，定义为"label"：
LabelRenderer r = new LabelRenderer(GraphLib.LABEL);
包含 的节点Graph通过setString()使用相同的键给出文本，GraphLib.LABEL。例如，Node添加到Graphreturn by的根GraphLib.getDiamondTree()被分配 keyGraphLib.LABEL和 value "0,0"。
Node r = t.addRoot();
r.setString(LABEL, "0,0");
稍后，当Visualization运行时，渲染器会尝试使用GraphLib.LABEL字段中的文本。
import java.awt.Dimension;
import javax.swing.JFrame;
import prefuse.Display;
import prefuse.Visualization;
import prefuse.action.ActionList;
import prefuse.action.RepaintAction;
import prefuse.action.assignment.ColorAction;
import prefuse.action.layout.graph.ForceDirectedLayout;
import prefuse.activity.Activity;
import prefuse.controls.DragControl;
import prefuse.controls.PanControl;
import prefuse.controls.ZoomControl;
import prefuse.data.Graph;
import prefuse.render.DefaultRendererFactory;
import prefuse.render.LabelRenderer;
import prefuse.util.ColorLib;
import prefuse.util.GraphLib;
import prefuse.visual.VisualItem;
/** @see https://stackoverflow.com/a/44274886/230513 */
public class Example {
private static final int W = 640;
private static final int H = 480;
public static void main(String[] argv) {
// -- 1. create the data ------------------------------------------------
Graph graph = GraphLib.getDiamondTree(3, 2, 1);
// -- 2. the visualization --------------------------------------------
// add the graph to the visualization as the data group "graph"
// nodes and edges are accessible as "graph.nodes" and "graph.edges"
Visualization vis = new Visualization();
vis.add("graph", graph);
vis.setInteractive("graph.edges", null, false);
// -- 3. the renderers and renderer factory ---------------------------
LabelRenderer r = new LabelRenderer(GraphLib.LABEL);
r.setRoundedCorner(8, 8); // round the corners
// create a new default renderer factory
// return our name label renderer as the default for all non-EdgeItems
// includes straight line edges for EdgeItems by default
vis.setRendererFactory(new DefaultRendererFactory(r));
// -- 4. the processing actions ---------------------------------------
ColorAction fill = new ColorAction("graph.nodes",
VisualItem.FILLCOLOR, ColorLib.rgb(200, 200, 255));
// use black for node text
ColorAction text = new ColorAction("graph.nodes",
VisualItem.TEXTCOLOR, ColorLib.gray(0));
// use light grey for edges
ColorAction edges = new ColorAction("graph.edges",
VisualItem.STROKECOLOR, ColorLib.gray(200));
// create an action list containing all color assignments
ActionList color = new ActionList();
color.add(fill);
color.add(text);
color.add(edges);
// create an action list with an animated layout
ActionList layout = new ActionList(Activity.INFINITY);
layout.add(new ForceDirectedLayout("graph"));
layout.add(new RepaintAction());
// add the actions to the visualization
vis.putAction("color", color);
vis.putAction("layout", layout);
// -- 5. the display and interactive controls -------------------------
Display d = new Display(vis) {
@Override
public Dimension getPreferredSize() {
return new Dimension(W, H);
}
};
d.setSize(W, H); // set display size
d.pan(W / 2, H / 2); // pan to center
d.addControlListener(new DragControl());
d.addControlListener(new PanControl());
d.addControlListener(new ZoomControl());
// -- 6. launch the visualization -------------------------------------
JFrame frame = new JFrame("prefuse label example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(d);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true); // show the window
vis.run("color");
vis.run("layout");
}
}