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Java Source | 1997-07-30 | 6.3 KB | 202 lines |
- // $Header: z:/admin/metro_examples/java/demo/ClockTest/rcs/Clock2.java 1.2 1997/03/30 01:05:40 NPatel Exp $
- /*
- * @(#)Clock2.java 1.6 96/12/06
- *
- * Copyright (c) 1994-1996 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
- * modify and redistribute this software in source and binary code form,
- * provided that i) this copyright notice and license appear on all copies of
- * the software; and ii) Licensee does not utilize the software in a manner
- * which is disparaging to Sun.
- *
- * 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 SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
- * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
- * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
- * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
- * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
- * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- *
- * This software is not designed or intended for use in on-line control of
- * aircraft, air traffic, aircraft navigation or aircraft communications; or in
- * the design, construction, operation or maintenance of any nuclear
- * facility. Licensee represents and warrants that it will not use or
- * redistribute the Software for such purposes.
- */
-
- // author: Rachel Gollub, 1995
- // modified 96/04/24 Jim Hagen : use getBackground()
- // modified 96/05/29 Rachel Gollub : add garbage collecting
- // modified 96/10/22 Rachel Gollub : add bgcolor, fgcolor1, fgcolor2 params
- // modified 96/12/05 Rachel Gollub : change copyright and Date methods
- // Time!
-
- import java.util.*;
- import java.awt.*;
- import java.applet.*;
- import java.text.*;
-
- public class Clock2 extends Applet implements Runnable {
- Thread timer = null;
- int lastxs=0, lastys=0, lastxm=0, lastym=0, lastxh=0, lastyh=0;
- Date dummy = new Date();
- GregorianCalendar cal = new GregorianCalendar();
- SimpleDateFormat df = new SimpleDateFormat("EEE MMM dd HH:mm:ss yyyy");
- String lastdate = df.format(dummy);
- Font F = new Font("TimesRoman", Font.PLAIN, 14);
- Date dat = null;
- Color fgcol = Color.blue;
- Color fgcol2 = Color.darkGray;
-
- public void init() {
- int x,y;
-
- try {
- setBackground(new Color(Integer.parseInt(getParameter("bgcolor"),16)));
- } catch (Exception E) { }
- try {
- fgcol = new Color(Integer.parseInt(getParameter("fgcolor1"),16));
- } catch (Exception E) { }
- try {
- fgcol2 = 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, m, h, xcenter, ycenter;
- String today;
-
- dat = new Date();
- cal.setTime(dat);
- // cal.computeFields();
- s = (int)cal.get(Calendar.SECOND);
- m = (int)cal.get(Calendar.MINUTE);
- h = (int)cal.get(Calendar.HOUR_OF_DAY);
- today = df.format(dat);
- 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(F);
- g.setColor(fgcol);
- circle(xcenter,ycenter,50,g);
- g.setColor(fgcol2);
- 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(fgcol2);
- g.drawString(today, 5, 125);
- g.drawLine(xcenter, ycenter, xs, ys);
- g.setColor(fgcol);
- 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;
- dat=null;
- }
-
- public void start() {
- if(timer == null)
- {
- timer = new Thread(this);
- timer.start();
- }
- }
-
- public void stop() {
- timer = null;
- }
-
- public void run() {
- while (timer != null) {
- try {Thread.sleep(100);} catch (InterruptedException e){}
- repaint();
- }
- timer = null;
- }
-
- public void update(Graphics g) {
- paint(g);
- }
- }
-
-