// Copyright MageLang Institute; Version $Id: //depot/main/src/edu/modules/Swing/magercises/TreeExample/Solution/TreeExample.java#2 $
/*
 * Demonstrates tree view stuff in a scrollable pane.
 */

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;

public class TreeExample extends JFrame {
  // The initial width and height of the frame
  static int WIDTH = 300;
  static int HEIGHT = 200;

  public TreeExample(String lab) {
    super(lab);

    // Create the tree nodes
    DefaultMutableTreeNode component = 
      new DefaultMutableTreeNode("Component");
    DefaultMutableTreeNode container = 
      new DefaultMutableTreeNode("Container");
    DefaultMutableTreeNode box = 
      new DefaultMutableTreeNode("Box");
    DefaultMutableTreeNode jComponent = 
      new DefaultMutableTreeNode("JComponent");
    DefaultMutableTreeNode abstractButton = 
      new DefaultMutableTreeNode("AbstractButton");
    DefaultMutableTreeNode jButton = 
      new DefaultMutableTreeNode("JButton");
    DefaultMutableTreeNode jMenuItem = 
      new DefaultMutableTreeNode("JMenuItem");
    DefaultMutableTreeNode jToggle = 
      new DefaultMutableTreeNode("JToggleButton");
    DefaultMutableTreeNode jLabel = 
      new DefaultMutableTreeNode("JLabel");
    DefaultMutableTreeNode etc = 
      new DefaultMutableTreeNode("...");

    // Group the nodes
    component.add(container);
    container.add(box);
    container.add(jComponent);
    jComponent.add(abstractButton);
    abstractButton.add(jButton);
    abstractButton.add(jMenuItem);
    abstractButton.add(jToggle);
    jComponent.add(jLabel);
    jComponent.add(etc);

    // Create the TreeSelectionListener
    TreeSelectionListener listener = 
      new MyTreeSelectionListener();

    TreePanel tp = new TreePanel(component, listener);
    Container content = getContentPane();
    content.add(tp, BorderLayout.CENTER);
  }

  public static void main(String args[]) {
    TreeExample frame = new TreeExample("Tree Example");
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {System.exit(0);}
    });

    frame.setSize(WIDTH, HEIGHT);
    frame.setVisible(true);
  }

  class MyTreeSelectionListener 
      implements TreeSelectionListener {
    public void valueChanged (TreeSelectionEvent event) {
      TreePath path = event.getPath();
      System.out.println ("Selected: " + 
        path.getLastPathComponent());
      Object elements[] = path.getPath();
      for (int i=0; i<elements.length; i++) {
        System.out.print ("->" + elements[i]);
      }
      System.out.println ();
    }
  }
}