Genealogy Tree : Tree « Swing JFC « Java

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Java » Swing JFC » Tree 

Genealogy Tree
Genealogy Tree
/* From */
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 * -Redistribution in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 * A 1.4 example that uses the following files:
 * 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 java.util.Vector;

import javax.swing.ButtonGroup;
import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;

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();
    JPanel buttonPanel = new JPanel();

    //Construct the tree.
    tree = new GenealogyTree(getGenealogyGraph());
    JScrollPane scrollPane = new JScrollPane(tree);
    scrollPane.setPreferredSize(new Dimension(200200));

    //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) {
    else {

   * 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() {
    //Make sure we have nice window decorations.

    //Create and set up the window.
    JFrame frame = new JFrame("GenealogyExample");

    //Create and set up the content pane.
    GenealogyExample newContentPane = new GenealogyExample();
    newContentPane.setOpaque(true)//content panes must be opaque

    //Display the window.

  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() {

class GenealogyModel implements TreeModel {
  private boolean showAncestors;

  private Vector treeModelListeners = new Vector();

  private Person rootPerson;

  public GenealogyModel(Person root) {
    showAncestors = false;
    rootPerson = root;

   * Used to toggle between show ancestors/show descendant and to change the
   * root of the tree.
  public void showAncestor(boolean b, Object newRoot) {
    showAncestors = b;
    Person oldRoot = rootPerson;
    if (newRoot != null) {
      rootPerson = (PersonnewRoot;

  //////////////// Fire events //////////////////////////////////////////////

   * The only event raised by this model is TreeStructureChanged with the root
   * as path, i.e. the whole tree has changed.
  protected void fireTreeStructureChanged(Person oldRoot) {
    int len = treeModelListeners.size();
    TreeModelEvent e = new TreeModelEvent(this, new Object[] { oldRoot });
    for (int i = 0; i < len; i++) {

  //////////////// TreeModel interface implementation ///////////////////////

   * Adds a listener for the TreeModelEvent posted after the tree changes.
  public void addTreeModelListener(TreeModelListener l) {

   * Returns the child of parent at index index in the parent's child array.
  public Object getChild(Object parent, int index) {
    Person p = (Personparent;
    if (showAncestors) {
      if ((index > 0&& (p.getFather() != null)) {
        return p.getMother();
      return p.getFather();
    return p.getChildAt(index);

   * Returns the number of children of parent.
  public int getChildCount(Object parent) {
    Person p = (Personparent;
    if (showAncestors) {
      int count = 0;
      if (p.getFather() != null) {
      if (p.getMother() != null) {
      return count;
    return p.getChildCount();

   * Returns the index of child in parent.
  public int getIndexOfChild(Object parent, Object child) {
    Person p = (Personparent;
    if (showAncestors) {
      int count = 0;
      Person father = p.getFather();
      if (father != null) {
        if (father == child) {
          return 0;
      if (p.getMother() != child) {
        return count;
      return -1;
    return p.getIndexOfChild((Personchild);

   * Returns the root of the tree.
  public Object getRoot() {
    return rootPerson;

   * Returns true if node is a leaf.
  public boolean isLeaf(Object node) {
    Person p = (Personnode;
    if (showAncestors) {
      return ((p.getFather() == null&& (p.getMother() == null));
    return p.getChildCount() == 0;

   * Removes a listener previously added with addTreeModelListener().
  public void removeTreeModelListener(TreeModelListener l) {

   * Messaged when the user has altered the value for the item identified by
   * path to newValue. Not used by this model.
  public void valueForPathChanged(TreePath path, Object newValue) {
    System.out.println("*** valueForPathChanged : " + path + " --> "
        + newValue);

class Person {
  Person father;

  Person mother;

  Vector children;

  private String name;

  public Person(String name) { = name;
    mother = father = null;
    children = new Vector();

   * Link together all members of a family.
   @param pa
   *            the father
   @param ma
   *            the mother
   @param kids
   *            the children
  public static void linkFamily(Person pa, Person ma, Person[] kids) {
    int len = kids.length;
    Person kid = null;
    for (int i = 0; i < len; i++) {
      kid = kids[i];
      kid.father = pa;
      kid.mother = ma;

  /// getter methods ///////////////////////////////////

  public String toString() {
    return name;

  public String getName() {
    return name;

  public Person getFather() {
    return father;

  public Person getMother() {
    return mother;

  public int getChildCount() {
    return children.size();

  public Person getChildAt(int i) {
    return (Personchildren.elementAt(i);

  public int getIndexOfChild(Person kid) {
    return children.indexOf(kid);

class GenealogyTree extends JTree {
  GenealogyModel model;

  public GenealogyTree(Person graphNode) {
    super(new GenealogyModel(graphNode));
    DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
    Icon personIcon = null;

   * Get the selected item in the tree, and call showAncestor with this item
   * on the model.
  public void showAncestor(boolean b) {
    Object newRoot = null;
    TreePath path = getSelectionModel().getSelectionPath();
    if (path != null) {
      newRoot = path.getLastPathComponent();
    ((GenealogyModelgetModel()).showAncestor(b, newRoot);


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