Jscrollbar in graphstream

import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

import org.graphstream.graph.Graph;
import org.graphstream.graph.Node;
import org.graphstream.graph.implementations.SingleGraph;
import org.graphstream.ui.swingViewer.GraphRenderer;
import org.graphstream.ui.swingViewer.View;
import org.graphstream.ui.swingViewer.Viewer;
import org.graphstream.ui.swingViewer.ViewerListener;
import org.graphstream.ui.swingViewer.ViewerPipe;
import org.graphstream.ui.swingViewer.util.Camera;
import org.graphstream.ui.swingViewer.util.DefaultCamera;

public class Clicks extends JFrame implements ViewerListener {

    protected boolean loop = true;
    private JLabel label = new JLabel("bla");
    private Graph graph;

    public static void main(String args[]) {
        new Clicks();
    }

    public Clicks() {
        setSize(new Dimension(800, 600));

        // We do as usual to display a graph. This
        // connect the graph outputs to the viewer.
        // The viewer is a sink of the graph.
        graph = new SingleGraph("Clicks");
        graph.setStrict(false);
        Node n2 = graph.addNode("gs");
        Node n3 = graph.addNode("gs2");
        graph.addEdge("t", n2, n3);

        Viewer viewer = new Viewer(graph, Viewer.ThreadingModel.GRAPH_IN_ANOTHER_THREAD);
        //Viewer viewer = graph.display();

        View view = viewer.addDefaultView(false);
        viewer.enableAutoLayout();

        view.setMinimumSize(new Dimension(600, 600));
        view.setPreferredSize(new Dimension(600, 600));

        Camera cam = view.getCamera();

        this.getContentPane().setLayout(new BorderLayout());
        JScrollPane jsp = new JScrollPane(view);



        this.getContentPane().add(jsp, BorderLayout.CENTER);
        /*
        this.getContentPane().add(viewer.addView(
                String.format("defaultView_%d", (long) (Math.random() * 10000)),
                renderer, false), BorderLayout.CENTER);
                */
        this.getContentPane().add(label, BorderLayout.SOUTH);

        // The default action when closing the view is to quit
        // the program.
        viewer.setCloseFramePolicy(Viewer.CloseFramePolicy.HIDE_ONLY);

        // We connect back the viewer to the graph,
        // the graph becomes a sink for the viewer.
        // We also install us as a viewer listener to
        // intercept the graphic events.
        ViewerPipe fromViewer = new BlockingViewerPipe(viewer);
        fromViewer.addViewerListener(this);
        fromViewer.addSink(graph);

        this.setVisible(true);


        // Then we need a loop to wait for events.
        // In this loop we will need to call the
        // pump() method to copy back events that have
        // already occurred in the viewer thread inside
        // our thread.



        while(loop) {
            fromViewer.pump();
            System.out.println("Pumping....."+Math.random());
        }

    }

    public void viewClosed(String id) {
        loop = false;
    }

    public void buttonPushed(String id) {
        label.setText(id);
        Node n = graph.addNode("Node: "+(int)(Math.random()*100));
        graph.addEdge(n.getId(), n, graph.getNode(0));
    }

    public void buttonReleased(String id) {
        System.out.println("Button released on node "+id);
    }
}