Re: in which thread shoud I use dialogs?

In article <CNmdnVV2GZYN8a_WnZ2dnUVZ_o6dnZ2d@posted.palinacquisition>,
 Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> wrote:


I couldn't resist. Happy Holidays!

package xmas;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.LinkedList;
import java.util.Queue;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.Timer;

public class DialogTest extends JPanel implements ActionListener {

    private static final int MAX = 64;
    private static final String title = "Baubles";
    private static final Random rnd = new Random();
    private static final AlphaComposite ac =
        AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.75f);
    private final Timer timer = new Timer(100, this);
    private final Queue<Bauble> queue = new LinkedList<Bauble>();

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame f = new JFrame(title);
                f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                DialogTest dt = new DialogTest();
                f.add(dt);
                f.pack();
                f.setLocationRelativeTo(null);
                f.setVisible(true);
                JOptionPane.showMessageDialog(dt, title);
            }
        });
    }

    public DialogTest() {
        this.setPreferredSize(new Dimension(8 * MAX, 8 * MAX));
        timer.start();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (queue.isEmpty()) {
            for (int i = 0; i < MAX; i++) {
                queue.add(randomBauble());
            }
        }
        queue.add(randomBauble());
        queue.remove();
        this.repaint();
    }

    @Override
    public void paintComponent(Graphics g) {
        Graphics2D g2d = (Graphics2D) g;
        g2d.setRenderingHint(
            RenderingHints.KEY_ANTIALIASING,
            RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setColor(Color.black);
        g2d.fillRect(0, 0, this.getWidth(), this.getHeight());
        g2d.setComposite(ac);
        for (Bauble b : queue) {
            g2d.setColor(b.c);
            g2d.fillOval(b.x, b.y, b.d, b.d);
        }
    }

    private Bauble randomBauble() {
        int x = rnd.nextInt(this.getWidth());
        int y = rnd.nextInt(this.getHeight());
        int r = rnd.nextInt(MAX) + MAX / 2;
        Color c = new Color(rnd.nextInt());
        return new Bauble(x, y, r, c);
    }

    private static class Bauble {
        private int x, y, d;
        private Color c;

        public Bauble(int x, int y, int r, Color c) {
            this.x = x - r;
            this.y = y - r;
            this.d = 2 * r;
            this.c = c;
        }
    }
}

--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>