GenealogyExample.java

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package javademo.swing.tree.GenealogyExample;

/*
 * A 1.4 example that uses the following files:
 *    GenealogyModel.java
 *    Person.java
 *
 * Based on an example provided by tutorial reader Olivier Berlanger.
 */
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;

@SuppressWarnings("serial")
public class GenealogyExample extends JPanel implements ActionListener
{
    GenealogyTree tree;
    
    private static String SHOW_ANCESTOR_CMD = "showAncestor";
    
    public GenealogyExample()
    {
        super(new BorderLayout());
        
        // Construct the panel with the toggle buttons.
        JRadioButton showDescendant = new JRadioButton("Show descendants", true);
        final JRadioButton showAncestor = new JRadioButton("Show ancestors");
        ButtonGroup bGroup = new ButtonGroup();
        bGroup.add(showDescendant);
        bGroup.add(showAncestor);
        showDescendant.addActionListener(this);
        showAncestor.addActionListener(this);
        showAncestor.setActionCommand(SHOW_ANCESTOR_CMD);
        JPanel buttonPanel = new JPanel();
        buttonPanel.add(showDescendant);
        buttonPanel.add(showAncestor);
        
        // Construct the tree.
        tree = new GenealogyTree(getGenealogyGraph());
        JScrollPane scrollPane = new JScrollPane(tree);
        scrollPane.setPreferredSize(new Dimension(200, 200));
        
        // Add everything to this panel.
        add(buttonPanel, BorderLayout.PAGE_START);
        add(scrollPane, BorderLayout.CENTER);
    }
    
    /** 
     * Required by the ActionListener interface.
     * Handle events on the showDescendant and
     * showAncestore buttons. 
     */
    public void actionPerformed(ActionEvent ae)
    {
        if (ae.getActionCommand() == SHOW_ANCESTOR_CMD)
        {
            tree.showAncestor(true);
        }
        else
        {
            tree.showAncestor(false);
        }
    }
    
    /**
     *  Constructs the genealogy graph used by the model.
     */
    public Person getGenealogyGraph()
    {
        // the greatgrandparent generation
        Person a1 = new Person("Jack (great-granddaddy)");
        Person a2 = new Person("Jean (great-granny)");
        Person a3 = new Person("Albert (great-granddaddy)");
        Person a4 = new Person("Rae (great-granny)");
        Person a5 = new Person("Paul (great-granddaddy)");
        Person a6 = new Person("Josie (great-granny)");
        
        // the grandparent generation
        Person b1 = new Person("Peter (grandpa)");
        Person b2 = new Person("Zoe (grandma)");
        Person b3 = new Person("Simon (grandpa)");
        Person b4 = new Person("James (grandpa)");
        Person b5 = new Person("Bertha (grandma)");
        Person b6 = new Person("Veronica (grandma)");
        Person b7 = new Person("Anne (grandma)");
        Person b8 = new Person("Renee (grandma)");
        Person b9 = new Person("Joseph (grandpa)");
        
        // the parent generation
        Person c1 = new Person("Isabelle (mom)");
        Person c2 = new Person("Frank (dad)");
        Person c3 = new Person("Louis (dad)");
        Person c4 = new Person("Laurence (dad)");
        Person c5 = new Person("Valerie (mom)");
        Person c6 = new Person("Marie (mom)");
        Person c7 = new Person("Helen (mom)");
        Person c8 = new Person("Mark (dad)");
        Person c9 = new Person("Oliver (dad)");
        
        // the youngest generation
        Person d1 = new Person("Clement (boy)");
        Person d2 = new Person("Colin (boy)");
        
        Person.linkFamily(a1, a2, new Person[] { b1, b2, b3, b4 });
        Person.linkFamily(a3, a4, new Person[] { b5, b6, b7 });
        Person.linkFamily(a5, a6, new Person[] { b8, b9 });
        Person.linkFamily(b3, b6, new Person[] { c1, c2, c3 });
        Person.linkFamily(b4, b5, new Person[] { c4, c5, c6 });
        Person.linkFamily(b8, b7, new Person[] { c7, c8, c9 });
        Person.linkFamily(c4, c7, new Person[] { d1, d2 });
        
        return a1;
    }
    
    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI()
    {
        // Create and set up the window.
        JFrame frame = new JFrame("GenealogyExample");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        // Create and set up the content pane.
        GenealogyExample newContentPane = new GenealogyExample();
        newContentPane.setOpaque(true); // content panes must be opaque
        frame.setContentPane(newContentPane);
        
        // Display the window.
        frame.pack();
        frame.setVisible(true);
    }
    
    public static void main(String[] args)
    {
        // Schedule a job for the event-dispatching thread:
        // creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {
                createAndShowGUI();
            }
        });
    }
}