/*
Author : Rachel Gollub, 1995
Updated: Burin Rujjanapan 2549-08-25
Public : http://www.thaiall.com/class
DOS> javac NoteClock.java
DOS> edit x.htm
<applet code="NoteClock.class" width=120 height=120></applet>
*/
import java.util.*;
import java.awt.*;
import java.applet.*;
import java.text.*;
public class NoteClock extends Applet implements Runnable {
  Thread timer;        
  int lastxs, lastys, lastxm, lastym, lastxh, lastyh;  
  Font clockFaceFont;        
  public void init() {
    int x,y;
    lastxs = lastys = lastxm = lastym = lastxh = lastyh = 0;
    clockFaceFont = new Font("serif", Font.PLAIN, 20);
    setBackground(Color.black);
  }
  public void plotpoints(int x0, int y0, int x, int y, Graphics g) {
    g.drawLine(x0+x,y0+y,x0+x,y0+y);
    g.drawLine(x0+y,y0+x,x0+y,y0+x);
    g.drawLine(x0+y,y0-x,x0+y,y0-x);
    g.drawLine(x0+x,y0-y,x0+x,y0-y);
    g.drawLine(x0-x,y0-y,x0-x,y0-y);
    g.drawLine(x0-y,y0-x,x0-y,y0-x);
    g.drawLine(x0-y,y0+x,x0-y,y0+x);
    g.drawLine(x0-x,y0+y,x0-x,y0+y);
  }   
  public void circle(int x0, int y0, int r, Graphics g) {
    int x,y;
    float d;
    x=0;
    y=r;
    d=5/4-r;
    plotpoints(x0,y0,x,y,g);
    while (y>x){
      if (d<0) {
        d=d+2*x+3;
        x++;
      } else {
        d=d+2*(x-y)+5;
        x++;
        y--;
      }
      plotpoints(x0,y0,x,y,g);
    }
  }  
  public void paint(Graphics g) {
    int xh, yh, xm, ym, xs, ys, s = 0, m = 10, h = 10, xcenter, ycenter;
    xcenter=55; // จุดศูนย์กลางของนาฬิกา ในแกน X
    ycenter=55; // จุดศูนย์กลางของนาฬิกา ในแกน Y
    GregorianCalendar calendar = new GregorianCalendar();
    s = calendar.get(Calendar.SECOND);
    m = calendar.get(Calendar.MINUTE);
    h = calendar.get(Calendar.HOUR);    
    xs = (int)(Math.cos(s * 3.14f/30 - 3.14f/2) * 45 + xcenter);
    ys = (int)(Math.sin(s * 3.14f/30 - 3.14f/2) * 45 + ycenter);
    xm = (int)(Math.cos(m * 3.14f/30 - 3.14f/2) * 40 + xcenter);
    ym = (int)(Math.sin(m * 3.14f/30 - 3.14f/2) * 40 + ycenter);
    xh = (int)(Math.cos((h*30 + m/2) * 3.14f/180 - 3.14f/2) * 30 + xcenter);
    yh = (int)(Math.sin((h*30 + m/2) * 3.14f/180 - 3.14f/2) * 30 + ycenter);  
	g.setFont(clockFaceFont);
    g.setColor(Color.blue);
    circle(xcenter,ycenter,50,g);
    g.setColor(Color.green);
    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);  
    g.setColor(getBackground());
    if (xs != lastxs || ys != lastys) g.drawLine(xcenter, ycenter, lastxs, lastys);
    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); 
    }
    g.setColor(Color.green);
    g.drawLine(xcenter, ycenter, xs, ys);
    g.setColor(Color.blue);
    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;
  }
  public void start() {
    timer = new Thread(this);
    timer.start();
  }
  public void run() {
    Thread me = Thread.currentThread();
    while (timer == me) {
      try {
        Thread.currentThread().sleep(100);
      } catch (InterruptedException e) { }
      repaint();
    }
  } 
}