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import java.util.*;
import java.awt.*;
import java.applet.*;
import java.text.*;
/**
* Time!
*
* @author Rachel Gollub
*/
public class Clock2 extends Applet implements Runnable {
Thread timer; // The thread that displays clock
int lastxs, lastys, lastxm,
lastym, lastxh, lastyh; // Dimensions used to draw hands
SimpleDateFormat formatter; // Formats the date displayed
String lastdate; // String to hold date displayed
Font clockFaceFont; // Font for number display on clock
Date currentDate; // Used to get date to display
Color handColor; // Color of main hands and dial
Color numberColor; // Color of second hand and numbers
public void init() {
int x,y;
lastxs = lastys = lastxm = lastym = lastxh = lastyh = 0;
formatter = new SimpleDateFormat ("EEE MMM dd hh:mm:ss yyyy", 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 (Exception E) { }
try {
handColor = new Color(Integer.parseInt(getParameter("fgcolor1"),16));
} catch (Exception E) { }
try {
numberColor = new Color(Integer.parseInt(getParameter("fgcolor2"),16));
} catch (Exception E) { }
resize(300,300); // Set clock window size
}
// Plotpoints allows calculation to only cover 45 degrees of the circle,
// and then mirror
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);
}
// Circle is just Bresenham's algorithm for a scan converted circle
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);
}
}
// Paint is the main part of the program
public void paint(Graphics g) {
int xh, yh, xm, ym, xs, ys, s = 0, m = 10, h = 10, xcenter, ycenter;
String today;
currentDate = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("s",Locale.getDefault());
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;
}
formatter.applyPattern("EEE MMM dd HH:mm:ss yyyy");
today = formatter.format(currentDate);
xcenter=80;
ycenter=55;
// a= s* pi/2 - pi/2 (to switch 0,0 from 3:00 to 12:00)
// x = r(cos a) + xcenter, y = r(sin a) + ycenter
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);
// Draw the circle and numbers
g.setFont(clockFaceFont);
g.setColor(handColor);
circle(xcenter,ycenter,50,g);
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);
// Erase if necessary, and redraw
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); }
g.setColor(numberColor);
g.drawString("", 5, 125);
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 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 void update(Graphics g) {
paint(g);
}
public String getAppletInfo() {
return "Title: A Clock \nAuthor: Rachel Gollub, 1995 \nAn 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 seconds hand and numbers. Default is dark gray."}
};
return info;
}
}
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