214 lines
7.5 KiB
Java
214 lines
7.5 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import java.util.*;
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import java.awt.*;
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import java.applet.*;
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import java.text.*;
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/**
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* Time!
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*
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* @author Rachel Gollub
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*/
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public class Clock2 extends Applet implements Runnable {
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Thread timer; // The thread that displays clock
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int lastxs, lastys, lastxm,
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lastym, lastxh, lastyh; // Dimensions used to draw hands
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SimpleDateFormat formatter; // Formats the date displayed
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String lastdate; // String to hold date displayed
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Font clockFaceFont; // Font for number display on clock
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Date currentDate; // Used to get date to display
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Color handColor; // Color of main hands and dial
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Color numberColor; // Color of second hand and numbers
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public void init() {
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int x,y;
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lastxs = lastys = lastxm = lastym = lastxh = lastyh = 0;
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formatter = new SimpleDateFormat ("EEE MMM dd hh:mm:ss yyyy", Locale.getDefault());
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currentDate = new Date();
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lastdate = formatter.format(currentDate);
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clockFaceFont = new Font("Serif", Font.PLAIN, 14);
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handColor = Color.blue;
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numberColor = Color.darkGray;
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try {
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setBackground(new Color(Integer.parseInt(getParameter("bgcolor"),16)));
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} catch (Exception E) { }
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try {
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handColor = new Color(Integer.parseInt(getParameter("fgcolor1"),16));
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} catch (Exception E) { }
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try {
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numberColor = new Color(Integer.parseInt(getParameter("fgcolor2"),16));
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} catch (Exception E) { }
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resize(300,300); // Set clock window size
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}
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// Plotpoints allows calculation to only cover 45 degrees of the circle,
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// and then mirror
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public void plotpoints(int x0, int y0, int x, int y, Graphics g) {
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g.drawLine(x0+x,y0+y,x0+x,y0+y);
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g.drawLine(x0+y,y0+x,x0+y,y0+x);
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g.drawLine(x0+y,y0-x,x0+y,y0-x);
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g.drawLine(x0+x,y0-y,x0+x,y0-y);
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g.drawLine(x0-x,y0-y,x0-x,y0-y);
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g.drawLine(x0-y,y0-x,x0-y,y0-x);
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g.drawLine(x0-y,y0+x,x0-y,y0+x);
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g.drawLine(x0-x,y0+y,x0-x,y0+y);
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}
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// Circle is just Bresenham's algorithm for a scan converted circle
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public void circle(int x0, int y0, int r, Graphics g) {
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int x,y;
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float d;
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x=0;
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y=r;
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d=5/4-r;
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plotpoints(x0,y0,x,y,g);
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while (y>x){
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if (d<0) {
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d=d+2*x+3;
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x++;
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}
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else {
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d=d+2*(x-y)+5;
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x++;
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y--;
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}
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plotpoints(x0,y0,x,y,g);
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}
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}
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// Paint is the main part of the program
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public void paint(Graphics g) {
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int xh, yh, xm, ym, xs, ys, s = 0, m = 10, h = 10, xcenter, ycenter;
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String today;
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currentDate = new Date();
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SimpleDateFormat formatter = new SimpleDateFormat("s",Locale.getDefault());
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try {
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s = Integer.parseInt(formatter.format(currentDate));
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} catch (NumberFormatException n) {
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s = 0;
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}
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formatter.applyPattern("m");
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try {
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m = Integer.parseInt(formatter.format(currentDate));
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} catch (NumberFormatException n) {
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m = 10;
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}
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formatter.applyPattern("h");
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try {
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h = Integer.parseInt(formatter.format(currentDate));
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} catch (NumberFormatException n) {
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h = 10;
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}
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formatter.applyPattern("EEE MMM dd HH:mm:ss yyyy");
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today = formatter.format(currentDate);
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xcenter=80;
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ycenter=55;
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// a= s* pi/2 - pi/2 (to switch 0,0 from 3:00 to 12:00)
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// x = r(cos a) + xcenter, y = r(sin a) + ycenter
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xs = (int)(Math.cos(s * 3.14f/30 - 3.14f/2) * 45 + xcenter);
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ys = (int)(Math.sin(s * 3.14f/30 - 3.14f/2) * 45 + ycenter);
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xm = (int)(Math.cos(m * 3.14f/30 - 3.14f/2) * 40 + xcenter);
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ym = (int)(Math.sin(m * 3.14f/30 - 3.14f/2) * 40 + ycenter);
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xh = (int)(Math.cos((h*30 + m/2) * 3.14f/180 - 3.14f/2) * 30 + xcenter);
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yh = (int)(Math.sin((h*30 + m/2) * 3.14f/180 - 3.14f/2) * 30 + ycenter);
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// Draw the circle and numbers
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g.setFont(clockFaceFont);
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g.setColor(handColor);
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circle(xcenter,ycenter,50,g);
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g.setColor(numberColor);
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g.drawString("9",xcenter-45,ycenter+3);
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g.drawString("3",xcenter+40,ycenter+3);
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g.drawString("12",xcenter-5,ycenter-37);
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g.drawString("6",xcenter-3,ycenter+45);
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// Erase if necessary, and redraw
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g.setColor(getBackground());
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if (xs != lastxs || ys != lastys) {
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g.drawLine(xcenter, ycenter, lastxs, lastys);
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g.drawString(lastdate, 5, 125);
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}
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if (xm != lastxm || ym != lastym) {
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g.drawLine(xcenter, ycenter-1, lastxm, lastym);
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g.drawLine(xcenter-1, ycenter, lastxm, lastym); }
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if (xh != lastxh || yh != lastyh) {
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g.drawLine(xcenter, ycenter-1, lastxh, lastyh);
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g.drawLine(xcenter-1, ycenter, lastxh, lastyh); }
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g.setColor(numberColor);
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g.drawString("", 5, 125);
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g.drawString(today, 5, 125);
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g.drawLine(xcenter, ycenter, xs, ys);
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g.setColor(handColor);
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g.drawLine(xcenter, ycenter-1, xm, ym);
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g.drawLine(xcenter-1, ycenter, xm, ym);
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g.drawLine(xcenter, ycenter-1, xh, yh);
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g.drawLine(xcenter-1, ycenter, xh, yh);
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lastxs=xs; lastys=ys;
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lastxm=xm; lastym=ym;
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lastxh=xh; lastyh=yh;
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lastdate = today;
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currentDate=null;
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}
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public void start() {
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timer = new Thread(this);
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timer.start();
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}
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public void stop() {
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timer = null;
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}
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public void run() {
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Thread me = Thread.currentThread();
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while (timer == me) {
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try {
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Thread.currentThread().sleep(100);
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} catch (InterruptedException e) {
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}
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repaint();
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}
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}
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public void update(Graphics g) {
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paint(g);
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}
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public String getAppletInfo() {
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return "Title: A Clock \nAuthor: Rachel Gollub, 1995 \nAn analog clock.";
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}
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public String[][] getParameterInfo() {
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String[][] info = {
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{"bgcolor", "hexadecimal RGB number", "The background color. Default is the color of your browser."},
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{"fgcolor1", "hexadecimal RGB number", "The color of the hands and dial. Default is blue."},
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{"fgcolor2", "hexadecimal RGB number", "The color of the seconds hand and numbers. Default is dark gray."}
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};
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return info;
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}
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}
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