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 * Copyright (c) 2003 Sun Microsystems, Inc. All  Rights Reserved.
 *
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 * modification, are permitted provided that the following conditions
 * are met:
 *
 * -Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduct 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
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT
 * BE LIABLE FOR ANY DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
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/*
 * @(#)Clock.java	1.12 03/01/23
 * several updates	1.16 ??/??/??
*/

import java.util.*;
import java.awt.*;
import java.applet.*;
import java.text.*;

/**
 * Time!
 *
 * @author Rachel Gollub
 * @modified Daniel Peek, replaced circle drawing calculation, few more changes
*/
public class clock extends Applet implements Runnable {
  private volatile Thread timer;	// The thread that displays clock
  private int lastxs, lastys, lastxm,
              lastym, lastxh, lastyh;	// Dimensions used to draw hands
  private SimpleDateFormat formatter;	// Formats the date displayed
  private String lastdate;		// String to hold date displayed
  private Font clockFaceFont;		// Font for number display on clock
  private Date currentDate;		// Used to get date to display
  private Color handColor;		// Color of main hands and dial
  private Color numberColor;		// Color of second hand and numbers
  private int xcenter = 80, ycenter = 55; // Center position

  public void init() {
    int x,y;
    lastxs = lastys = lastxm = lastym = lastxh = lastyh = 0;
    formatter = new SimpleDateFormat ("EEE MMM dd yyyy, hh:mm:ss", Locale.getDefault());
    currentDate = new Date();
    lastdate = formatter.format(currentDate);
    clockFaceFont = new Font("Serif", Font.PLAIN, 14);
    handColor = Color.blue;
    numberColor = Color.darkGray;

    try {
      setBackground(new Color(Integer.parseInt(getParameter("bgcolor"), 16)));
    } catch (NullPointerException e) {
    } catch (NumberFormatException e) {
    }
    try {
      handColor = new Color(Integer.parseInt(getParameter("fgcolor1"), 16));
    } catch (NullPointerException e) {
    } catch (NumberFormatException e) {
    }
    try {
      numberColor = new Color(Integer.parseInt(getParameter("fgcolor2"), 16));
    } catch (NullPointerException e) {
    } catch (NumberFormatException e) {
    }
    resize(300,300);			// Set clock window size
  }

  // Paint is the main part of the program
  public void update(Graphics g) {
    int xh, yh, xm, ym, xs, ys;
    int s = 0, m = 10, h = 10;
    String today;

    currentDate = new Date();

    formatter.applyPattern("s");
    try {
      s = Integer.parseInt(formatter.format(currentDate));
    } catch (NumberFormatException n) {
      s = 0;
    }
    formatter.applyPattern("m");
    try {
      m = Integer.parseInt(formatter.format(currentDate));
    } catch (NumberFormatException n) {
      m = 10;
    }
    formatter.applyPattern("h");
    try {
      h = Integer.parseInt(formatter.format(currentDate));
    } catch (NumberFormatException n) {
      h = 10;
    }

    // Set position of the ends of the hands
    xs = (int) (Math.cos(s * Math.PI / 30 - Math.PI / 2) * 45 + xcenter);
    ys = (int) (Math.sin(s * Math.PI / 30 - Math.PI / 2) * 45 + ycenter);
    xm = (int) (Math.cos(m * Math.PI / 30 - Math.PI / 2) * 40 + xcenter);
    ym = (int) (Math.sin(m * Math.PI / 30 - Math.PI / 2) * 40 + ycenter);
    xh = (int) (Math.cos((h*30 + m / 2) * Math.PI / 180 - Math.PI / 2) * 30
                   + xcenter);
    yh = (int) (Math.sin((h*30 + m / 2) * Math.PI / 180 - Math.PI / 2) * 30
               + ycenter);

    // Get the date to print at the bottom
    formatter.applyPattern("EEE MMM dd yyyy, hh:mm:ss");
    today = formatter.format(currentDate);

    g.setFont(clockFaceFont);
    // Erase if necessary
    g.setColor(getBackground());
    if (xs != lastxs || ys != lastys) {
      g.drawLine(xcenter, ycenter, lastxs, lastys);
      g.drawString(lastdate, 5, 125);
    }
    if (xm != lastxm || ym != lastym) {
      g.drawLine(xcenter, ycenter-1, lastxm, lastym);
      g.drawLine(xcenter-1, ycenter, lastxm, lastym);
    }
    if (xh != lastxh || yh != lastyh) {
      g.drawLine(xcenter, ycenter-1, lastxh, lastyh);
      g.drawLine(xcenter-1, ycenter, lastxh, lastyh);
    }

    // Draw date and hands
    g.setColor(numberColor);
    g.drawString(today, 5, 125);
    g.drawLine(xcenter, ycenter, xs, ys);
    g.setColor(handColor);
    g.drawLine(xcenter, ycenter-1, xm, ym);
    g.drawLine(xcenter-1, ycenter, xm, ym);
    g.drawLine(xcenter, ycenter-1, xh, yh);
    g.drawLine(xcenter-1, ycenter, xh, yh);
    lastxs = xs; lastys = ys;
    lastxm = xm; lastym = ym;
    lastxh = xh; lastyh = yh;
    lastdate = today;
    currentDate = null;
  }

  public void paint(Graphics g) {
    g.setFont(clockFaceFont);
    // Draw the circle and numbers
    g.setColor(handColor);
    g.drawArc(xcenter-50, ycenter-50, 100, 100, 0, 360);
    g.setColor(numberColor);
    g.drawString("9", xcenter-45, ycenter+3);
    g.drawString("3", xcenter+40, ycenter+3);
    g.drawString("12", xcenter-5, ycenter-37);
    g.drawString("6", xcenter-3, ycenter+45);

    // Draw date and hands
    g.setColor(numberColor);
    g.drawString(lastdate, 5, 125);
    g.drawLine(xcenter, ycenter, lastxs, lastys);
    g.setColor(handColor);
    g.drawLine(xcenter, ycenter-1, lastxm, lastym);
    g.drawLine(xcenter-1, ycenter, lastxm, lastym);
    g.drawLine(xcenter, ycenter-1, lastxh, lastyh);
    g.drawLine(xcenter-1, ycenter, lastxh, lastyh);
  }

  public void start() {
    timer = new Thread(this);
    timer.start();
  }

  public void stop() {
    timer = null;
  }

  public void run() {
    Thread me = Thread.currentThread();
    while (timer == me) {
      try {
        Thread.currentThread().sleep(100);
      } catch (InterruptedException e) {
      }
      repaint();
    }
  }

  public String getAppletInfo() {
    return "Title: A Clock\n"
      + "Author: Rachel Gollub, 1995\n"
      + "An analog clock.";
  }

  public String[][] getParameterInfo() {
    String[][] info = {
      {"bgcolor", "hexadecimal RGB number",
       "The background color. Default is the color of your browser."},
      {"fgcolor1", "hexadecimal RGB number",
       "The color of the hands and dial. Default is blue."},
      {"fgcolor2", "hexadecimal RGB number",
       "The color of the second hand and numbers. Default is dark gray."}
    };
    return info;
  }
}