Re: FlowLayout and lightweight IDEs

In article
<d5aba646-81e6-457b-8666-3b9fca8e9742@2g2000hsn.googlegroups.com>,
 bH <bherbst65@hotmail.com> wrote:
[...]


Thank you for following up. Your program is much improved, although I
confess I changed the pink Canvas to a light gray and added a call to
clearRect() in paint(). Although FlowLayout is reliable, I hope you have
a chance to experiment with alternative layouts.

Inspired by your program, I offer another Google application: the
GoogleOlympiad!

import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.util.*;
import javax.swing.*;
import javax.swing.border.*;

/**
 * @author John B. Matthews
 */
public class GoogleOlympiad
  extends JPanel implements ActionListener {

  private static final String prefix =
    "http://www.google.com/logos/olympics08_";
  private static final Border border =
    BorderFactory.createMatteBorder(4, 16, 4, 16, Color.lightGray);
  private static final Cursor defaultCursor =
    new Cursor(Cursor.DEFAULT_CURSOR);
  private static final Cursor waitCursor =
    new Cursor(Cursor.WAIT_CURSOR);

  private ArrayList<String> list = new ArrayList<String>();
  private JLabel imageLabel = new JLabel();
  private JButton quitButton = new JButton();
  private ImageIcon image = new ImageIcon();
  private JComboBox favorites;

  public GoogleOlympiad() {
    this.setLayout(new BorderLayout());

    list.add("opening.gif");
    list.add("cycling.gif");
    list.add("weightlifting.gif");
    list.add("diving.gif");
    list.add("rhythm.gif");
    list.add("rings.gif");
    list.add("basketball.gif");
    list.add("badminton.gif");
    list.add("soccer.gif");
    list.add("rowing.gif");
    list.add("curling.gif");

    JLabel titleLabel = new JLabel();
    titleLabel.setText("The Google Olympiad");
    titleLabel.setHorizontalAlignment(JLabel.CENTER);
    titleLabel.setFont(new Font("SansSerif", Font.BOLD, 24));
    titleLabel.setBorder(border);
    this.add(titleLabel, BorderLayout.NORTH);

    image.setImageObserver(imageLabel);
    imageLabel.setText("Select an image from the list below.");
    imageLabel.setHorizontalAlignment(JLabel.CENTER);
    imageLabel.setBorder(border);
    this.add(imageLabel, BorderLayout.CENTER);

    favorites = new JComboBox(
      list.toArray(new String[list.size()]));
    favorites.setActionCommand("favs");
    favorites.addActionListener(this);

    quitButton.setText("Quit");
    quitButton.setActionCommand("quit");
    quitButton.addActionListener(this);

    JPanel controlPanel = new JPanel();
    controlPanel.add(favorites);
    controlPanel.add(quitButton);
    controlPanel.setBorder(border);
    this.add(controlPanel, BorderLayout.SOUTH);
  }

  public void actionPerformed(ActionEvent ae) {
    String cmd = ae.getActionCommand();
    if ("favs".equals(cmd)) {
      int index = favorites.getSelectedIndex();
      imageLabel.setIcon(getImage(index));
    }
    if ("quit".equals(cmd)) {
      System.exit(0);
    }
  }

  private ImageIcon getImage(int index) {
    this.setCursor(waitCursor);
    try {
      image = new ImageIcon(new URL(prefix + list.get(index)));
    } catch (MalformedURLException e) {
      System.err.println(e.toString());
    }
    if (image.getImageLoadStatus() == MediaTracker.COMPLETE) {
      imageLabel.setText("");
    } else {
      imageLabel.setText("Image not available.");
    }
    this.setCursor(defaultCursor);
    return image;
  }

  public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
      public void run() {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(new GoogleOlympiad());
        frame.setTitle("Google Olympiad");
        frame.setSize(400, 300);
        frame.setVisible(true);
      }
    });
  }
}
[Yes, I know curling is not featured!]
--
John B. Matthews
trashgod at gmail dot com
home dot woh dot rr dot com slash jbmatthews