import org.jgraph.*;
import org.jgraph.graph.*;
import javax.swing.*;
import java.awt.*;
import java.awt.geom.*;

/**
 * Taken form the JGraph user manual at
 * http://www.jgraph.com/pub/jgraphmanual.pdf
 *
 * @author jgraph.com
 */
public class HelloWorld {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        GraphModel model = new DefaultGraphModel();
        GraphLayoutCache view = new GraphLayoutCache(model, new DefaultCellViewFactory());
        JGraph graph = new JGraph(model, view);
        DefaultGraphCell[] cells = new DefaultGraphCell[3];

        cells[0] = new DefaultGraphCell(new String("Hello"));
        GraphConstants.setBounds(cells[0].getAttributes(), new Rectangle2D.Double(20, 20, 40, 20));
        GraphConstants.setGradientColor(cells[0].getAttributes(), Color.orange);
        GraphConstants.setOpaque(cells[0].getAttributes(), true);
        DefaultPort port0 = new DefaultPort();
        cells[0].add(port0);

        cells[1] = new DefaultGraphCell(new String("World"));
        GraphConstants.setBounds(cells[1].getAttributes(), new Rectangle2D.Double(140, 140, 40, 20));
        GraphConstants.setGradientColor( cells[1].getAttributes(), Color.red);
        GraphConstants.setOpaque(cells[1].getAttributes(), true);
        DefaultPort port1 = new DefaultPort();
        cells[1].add(port1);

        DefaultEdge edge = new DefaultEdge();
        edge.setSource(cells[0].getChildAt(0));
        edge.setTarget(cells[1].getChildAt(0));
        cells[2] = edge;
        int arrow = GraphConstants.ARROW_CLASSIC;
        GraphConstants.setLineEnd(edge.getAttributes(), arrow);
        GraphConstants.setEndFill(edge.getAttributes(), true);

        graph.getGraphLayoutCache().insert(cells);

        JFrame frame = new JFrame("");
        frame.getContentPane().add(new JScrollPane(graph));
        frame.pack();
        frame.setVisible(true);
    }
}