Jung coloring vertex with value
I'm stuck at the moment with the Java library Jung.
I display vertices and edges, only I can not find any functions for vertex coloring that I need with the value of the vertices and not with the mouse.
import edu.uci.ics.jung.algorithms.layout.FRLayout;
import edu.uci.ics.jung.algorithms.layout.Layout;
import edu.uci.ics.jung.graph.Graph;
import edu.uci.ics.jung.visualization.BasicVisualizationServer;
import edu.uci.ics.jung.visualization.decorators.PickableVertexPaintTransformer;
import edu.uci.ics.jung.visualization.decorators.ToStringLabeller;
import edu.uci.ics.jung.visualization.renderers.DefaultVertexLabelRenderer;
import edu.uci.ics.jung.visualization.renderers.Renderer.VertexLabel.Position;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JFrame;
import org.apache.commons.collections15.Transformer;
import org.apache.commons.collections15.functors.ConstantTransformer;
public class Design {
public Graph<String, Integer> g;
public Design() {
this.g = ProjectTools.readNet("SmallTown.net");
}
public static <Paint> void main(String[] args) {
Design sgv = new Design();
Layout<Integer, String> layout = new FRLayout(sgv.g);
layout.setSize(new Dimension(800,800));
BasicVisualizationServer<Integer, String> vv =
new BasicVisualizationServer<Integer, String>(layout);
Transformer<Integer,Paint> vertexPaint = new Transformer<Integer,Paint>() {
public Paint transform(Integer i) {
return (Paint) Color.GREEN;
}
};
vv.setPreferredSize(new Dimension(850,850));
vv.getRenderContext().setVertexLabelRenderer(new DefaultVertexLabelRenderer(Color.green));
vv.getRenderContext().setEdgeDrawPaintTransformer(new ConstantTransformer(Color.white));
vv.getRenderContext().setEdgeStrokeTransformer(new ConstantTransformer(new BasicStroke(2.5f)));
vv.getRenderContext().setVertexFillPaintTransformer((Transformer<Integer, java.awt.Paint>) vertexPaint);
vv.getRenderContext().setVertexFillPaintTransformer(new PickableVertexPaintTransformer<Integer>(vv.getPickedVertexState(), Color.green, Color.yellow));
vv.setBackground(Color.gray);
vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller<Integer>());
vv.getRenderer().getVertexLabelRenderer().setPosition(Position.CNTR);
JFrame frame = new JFrame("Projet Algo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(vv);
frame.pack();
frame.setVisible(true);
}
}
My rendering : 
I can see two possible problems; you are calling setVertexFillPaintTransformer twice and BasicVisualizationServer dosn't seem to like DefaultModalGraphMouse .
Try this version:
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Paint;
import javax.swing.JFrame;
import org.apache.commons.collections15.Transformer;
import org.apache.commons.collections15.functors.ConstantTransformer;
import edu.uci.ics.jung.algorithms.layout.FRLayout;
import edu.uci.ics.jung.algorithms.layout.Layout;
import edu.uci.ics.jung.graph.Graph;
import edu.uci.ics.jung.visualization.VisualizationViewer;
import edu.uci.ics.jung.visualization.control.DefaultModalGraphMouse;
import edu.uci.ics.jung.visualization.decorators.ToStringLabeller;
import edu.uci.ics.jung.visualization.picking.PickedInfo;
import edu.uci.ics.jung.visualization.renderers.DefaultVertexLabelRenderer;
import edu.uci.ics.jung.visualization.renderers.Renderer.VertexLabel.Position;
public class Design {
public Graph<Integer, String> g;
public Design() {
this.g = ProjectTools.readNet("SmallTown.net");
}
private static class VertexPaintTransformer implements Transformer<Integer,Paint> {
private final PickedInfo<Integer> pi;
VertexPaintTransformer ( PickedInfo<Integer> pi ) {
super();
if (pi == null)
throw new IllegalArgumentException("PickedInfo instance must be non-null");
this.pi = pi;
}
@Override
public Paint transform(Integer i) {
Color p = null;
//Edit here to set the colours as reqired by your solution
if ( i % 2 == 0)
p = Color.GREEN;
else
p = Color.RED;
//Remove if a selected colour is not required
if ( pi.isPicked(i)){
p = Color.yellow;
}
return p;
}
}
public static <Paint> void main(String[] args) {
Design sgv = new Design();
Layout<Integer, String> layout = new FRLayout(sgv.g);
layout.setSize(new Dimension(800,800));
VisualizationViewer<Integer, String> vv = new VisualizationViewer<Integer, String>(layout);
Transformer<Integer,Paint> vertexPaint = new Transformer<Integer,Paint>() {
@Override
public Paint transform(Integer i) {
if ( i % 2 == 0)
return (Paint) Color.GREEN;
else
return (Paint) Color.RED;
}
};
vv.setPreferredSize(new Dimension(850,850));
vv.getRenderContext().setVertexLabelRenderer(new DefaultVertexLabelRenderer(Color.green));
vv.getRenderContext().setEdgeDrawPaintTransformer(new ConstantTransformer(Color.white));
vv.getRenderContext().setEdgeStrokeTransformer(new ConstantTransformer(new BasicStroke(2.5f)));
vv.getRenderContext().setVertexFillPaintTransformer(new VertexPaintTransformer(vv.getPickedVertexState()));
DefaultModalGraphMouse graphMouse = new DefaultModalGraphMouse();
graphMouse.setMode(edu.uci.ics.jung.visualization.control.ModalGraphMouse.Mode.PICKING);
vv.setGraphMouse(graphMouse);
vv.setBackground(Color.gray);
vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller<Integer>());
vv.getRenderer().getVertexLabelRenderer().setPosition(Position.CNTR);
JFrame frame = new JFrame("Projet Algo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(vv);
frame.pack();
frame.setVisible(true);
}
}
I've repalced your Transformer with a new version VertexPaintTransformer that supports selection, removed the second use of setVertexFillPaintTransformer and swithced you from a BasicVisualizationServer to VisualizationViewer so I can use a picking GraphMouse
I had to mock your ProjectTools#readNet() method but Ihope you can see the Odd, Even and Selected colours.
You can now modify VertexPaintTransformer#transform() as required
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