What this is

This file is part of the Tame Swing collection that we have compiled. All of the Java source code in these examples was created by Nobuo Tamemasa. As these examples have become hard to find on the internet, we have put them in one place here, supported by minimal advertising. In time we will include images of each running sample Java/Swing application.

The intent of having these files here is to help you learn Java and Swing by example, and Tame certainly created some terrific examples of the power of the Swing framework.

Other links

Keywords/tags

java, swing, JTree, tree, ImageIcon, icon, image, animated, model, TreeModel, DefaultTreeModel, TreeNode, TreePath, ImageObserver, event

The source code

/* (swing1.1.1beta2) */
package tame.examples;

import java.awt.BorderLayout;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.ImageObserver;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;

import tame.tree.IconNode;
import tame.tree.IconNodeRenderer;

/**
@author Nobuo Tamemasa
@version 1.0 06/20/99
*/
public class AnimatedIconTreeExample2 extends JFrame {
  final static String CAT = "cat";
  final static String DOG = "dog";

  public AnimatedIconTreeExample2() {
    super("AnimatedIconTreeExample2");
    String[] strs = {"CARNIVORA",                       // 0
		      "Felidae",                        // 1
		        "Acinonyx jutatus  (cheetah)",  // 2
		        "Panthera leo  (lion)",         // 3
		      "Canidae",                        // 4
		        "Canis lupus  (wolf)",          // 5
		        "Lycaon pictus  (lycaon)",      // 6
		        "Vulpes Vulpes  (fox)"};        // 7

    IconNode[] nodes = new IconNode[strs.length];
    for (int i=0;i<strs.length;i++) {
      nodes[i] = new IconNode(strs[i]);
    }
    nodes[0].add(nodes[1]);
    nodes[0].add(nodes[4]);
    nodes[1].add(nodes[2]);
    nodes[1].add(nodes[3]);
    nodes[4].add(nodes[5]);
    nodes[4].add(nodes[6]);
    nodes[4].add(nodes[7]);

    // If you want to share the ImageIcon with a node.

    nodes[2].setIconName(CAT);
    nodes[3].setIconName(CAT);
    nodes[5].setIconName(DOG);
    nodes[6].setIconName(DOG);
    nodes[7].setIconName(DOG);

    Hashtable icons = new Hashtable();
    icons.put(CAT ,new ImageIcon("images/3-119.gif"));
    icons.put(DOG ,new ImageIcon("images/3-6.gif"));

    JTree tree = new JTree( nodes[0] );
    tree.putClientProperty("JTree.icons", icons);
    tree.setCellRenderer(new IconNodeRenderer());
    setImageObserver(tree, nodes, icons);

    JScrollPane sp = new JScrollPane(tree);
    getContentPane().add(sp, BorderLayout.CENTER);
  }

  private void setImageObserver(JTree tree,IconNode[] nodes,Hashtable icons) {
    Hashtable observers = new Hashtable();

    for (int i=0;i<nodes.length;i++) {
      ImageIcon icon = (ImageIcon)nodes[i].getIcon();
      if (icon != null) {
        Vector repaintNodes = new Vector();
        repaintNodes.addElement(nodes[i]);
        icon.setImageObserver(new NodeImageObserver(tree, repaintNodes));
      } else {
        String iconName = nodes[i].getIconName();
        if (iconName != null) {
          Vector repaintNodes = (Vector)observers.get(iconName);
          if (repaintNodes == null) {
            repaintNodes = new Vector();
            observers.put(iconName, repaintNodes);
          }
          repaintNodes.addElement(nodes[i]);
        }
      }
    }

    Enumeration enum = observers.keys();
    while (enum.hasMoreElements()) {
      String iconName = (String)enum.nextElement();
      Vector repaintNodes = (Vector)observers.get(iconName);
      ImageIcon icon = (ImageIcon)icons.get(iconName);
      icon.setImageObserver(new NodeImageObserver(tree, repaintNodes));
    }
  }

  class NodeImageObserver implements ImageObserver {
    JTree            tree;
    DefaultTreeModel model;
    Vector           nodes;

    NodeImageObserver(JTree tree,Vector nodes) {
      this.tree  = tree;
      this.model = (DefaultTreeModel)tree.getModel();
      this.nodes = nodes;
    }

    public boolean imageUpdate(Image img, int flags,
			       int x, int y, int w, int h) {
      if ((flags & (FRAMEBITS|ALLBITS)) != 0) {
        Enumeration enum = nodes.elements();
        while (enum.hasMoreElements()) {
          TreeNode node = (TreeNode)enum.nextElement();
          TreePath path = new TreePath(model.getPathToRoot(node));
          Rectangle rect = tree.getPathBounds(path);
          if (rect != null) {
            tree.repaint(rect);
          }
        }
      }
      return (flags & (ALLBITS|ABORT)) == 0;
    }
  }

  public static void main(String args[]) {
    AnimatedIconTreeExample2 frame = new AnimatedIconTreeExample2();
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {System.exit(0);}
    });
    frame.setSize(280, 200);
    frame.setVisible(true);
  }
}