Animate Random Movement of vertex on jung - jung

Question

I created graph with static Layout in Jung. I have a method for random movement on 2D which moves the vertex for some number of steps. I appreciate the power of JUNG in most of the operations in my project but I wanted to animate the movement of the vertex when random walk method is called. I need help with this regard. below is my graph code.
final int NUM_WALKS = 41;
int count = 0;
while (count < NUM_WALKS) {
sa.randomwalk();
Graph<Integer, String> gr = wsn.generateRandomGraph();
Transformer<Integer, Point2D> locationTransformer = new Transformer<Integer, Point2D>() {
#Override
public Point2D transform(Integer vertex) {
int value = (vertex.intValue());// * 40) + 20;
Map<Integer, Integer> MapX = new HashMap<Integer, Integer>();
MapX = WirelesSensorNetwork.MapX_Object();
Map<Integer, Integer> MapY = new HashMap<Integer, Integer>();
MapY = WirelesSensorNetwork.MapY_Object();
return new Point2D.Float(MapX.get(value), MapY.get(value));
}
};
Dimension preferredSize = new Dimension(700, 600);
StaticLayout<Integer, String> layout = new StaticLayout<Integer, String>(gr, locationTransformer);
layout.setSize(new Dimension(300, 250));
VisualizationViewer<Integer, String> vv = new VisualizationViewer<Integer, String>(layout,
preferredSize);
vv.setBackground(Color.WHITE);
vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller());
vv.getRenderer().getVertexLabelRenderer().setPosition(Position.CNTR);
vv.getRenderContext().setEdgeShapeTransformer(new EdgeShape.Line<Integer, String>());
JFrame frame = new JFrame("Wireless Sensor Network ");
frame.getContentPane().setBackground(Color.WHITE);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(vv);
frame.pack();
frame.setVisible(true);
count++;
}

Answer 1

There's a lot I don't know about your program, so I can't actually test this.
You may find it useful to start with something like this:
// set up variables (you must be declaring 'sa' somewhere up here....)
final int NUM_WALKS = 41;
int count = 0;
// do first randomwalk
sa.randomwalk();
// create the graph, layout, and visualization
Graph<Integer, String> gr = wsn.generateRandomGraph();
// get locations for first layout
Transformer<Integer, Point2D> locationTransformer = new Transformer<Integer, Point2D>() {
#Override
public Point2D transform(Integer vertex) {
int value = (vertex.intValue());// * 40) + 20;
Map<Integer, Integer> MapX = new HashMap<Integer, Integer>();
MapX = WirelesSensorNetwork.MapX_Object();
Map<Integer, Integer> MapY = new HashMap<Integer, Integer>();
MapY = WirelesSensorNetwork.MapY_Object();
return new Point2D.Float(MapX.get(value), MapY.get(value));
}
};
// create the first StaticLayout
StaticLayout<Integer, String> layout = new StaticLayout<Integer, String>(gr, locationTransformer);
layout.setSize(new Dimension(300, 250));
// create the visualization
Dimension preferredSize = new Dimension(700, 600);
VisualizationViewer<Integer, String> vv = new VisualizationViewer<Integer, String>(layout,
preferredSize);
vv.setBackground(Color.WHITE);
vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller());
vv.getRenderer().getVertexLabelRenderer().setPosition(Renderer.VertexLabel.Position.CNTR);
vv.getRenderContext().setEdgeShapeTransformer(new EdgeShape.Line<Integer, String>());
JFrame frame = new JFrame("Wireless Sensor Network ");
frame.getContentPane().setBackground(Color.WHITE);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(vv);
frame.pack();
frame.setVisible(true);
// increment the count, since we have run the randomwalk one time
count++;
// do the rest of the randomwalks
// you might need to do something to slow down this loop so that it does not
// go too fast for the visualization to keep up with.
while (count < NUM_WALKS) {
sa.randomwalk();
// make a new location transformer after each walk
Transformer<Integer, Point2D> nextLocationTransformer = new Transformer<Integer, Point2D>() {
#Override
public Point2D transform(Integer vertex) {
int value = (vertex.intValue());// * 40) + 20;
Map<Integer, Integer> MapX = new HashMap<Integer, Integer>();
MapX = WirelesSensorNetwork.MapX_Object();
Map<Integer, Integer> MapY = new HashMap<Integer, Integer>();
MapY = WirelesSensorNetwork.MapY_Object();
return new Point2D.Float(MapX.get(value), MapY.get(value));
}
};
// make a new layout with the new location transformer
StaticLayout<Integer, String> newLayout = new StaticLayout<Integer, String>(gr, nextLocationTransformer);
newLayout.setSize(new Dimension(300, 250));
// animate the existing visualization to move from the previous layout to the new one
LayoutTransition<Integer, String> lt =
new LayoutTransition<Integer, String>(vv, vv.getGraphLayout(),
newLayout);
Animator animator = new Animator(lt);
animator.start();
count++;
}