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Java Source | 2002-09-06 | 4.7 KB | 126 lines |
- /*
- * Copyright (c) 2002 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * 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
- * OF OR RELATING TO USE, MODIFICATION OR DISTRIBUTION OF 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.
- *
- * You acknowledge that Software is not designed, licensed or intended for
- * use in the design, construction, operation or maintenance of any nuclear
- * facility.
- */
-
- /*
- * @(#)Blink.java 1.11 02/06/13
- */
-
- /**
- * I love blinking things.
- *
- * @author Arthur van Hoff
- * @modified 04/24/96 Jim Hagen use getBackground
- * @modified 02/05/98 Mike McCloskey removed use of deprecated methods
- * @modified 04/23/99 Josh Bloch, use timer instead of explicit multithreading.
- * @modified 07/10/00 Daniel Peek brought to code conventions, minor changes
- */
-
- import java.awt.*;
- import java.util.*;
-
- public class Blink extends java.applet.Applet {
- private Timer timer; // Schedules the blinking
- private String labelString; // The label for the window
- private int delay; // the delay time between blinks
-
- public void init() {
- String blinkFrequency = getParameter("speed");
- delay = (blinkFrequency == null) ? 400 :
- (1000 / Integer.parseInt(blinkFrequency));
- labelString = getParameter("lbl");
- if (labelString == null)
- labelString = "Blink";
- Font font = new java.awt.Font("Serif", Font.PLAIN, 24);
- setFont(font);
- }
-
- public void start() {
- timer = new Timer(); //creates a new timer to schedule the blinking
- timer.schedule(new TimerTask() { //creates a timertask to schedule
- // overrides the run method to provide functionality
- public void run() {
- repaint();
- }
- }
- , delay, delay);
- }
-
- public void paint(Graphics g) {
- int fontSize = g.getFont().getSize();
- int x = 0, y = fontSize, space;
- int red = (int) ( 50 * Math.random());
- int green = (int) ( 50 * Math.random());
- int blue = (int) (256 * Math.random());
- Dimension d = getSize();
- g.setColor(Color.black);
- FontMetrics fm = g.getFontMetrics();
- space = fm.stringWidth(" ");
- for (StringTokenizer t = new StringTokenizer(labelString);
- t.hasMoreTokens();) {
- String word = t.nextToken();
- int w = fm.stringWidth(word) + space;
- if (x + w > d.width) {
- x = 0;
- y += fontSize; //move word to next line if it doesn't fit
- }
- if (Math.random() < 0.5)
- g.setColor(new java.awt.Color((red + y*30) % 256,
- (green + x/3) % 256, blue));
- else
- g.setColor(getBackground());
- g.drawString(word, x, y);
- x += w; //shift to the right to draw the next word
- }
- }
-
- public void stop() {
- timer.cancel(); //stops the timer
- }
-
- public String getAppletInfo() {
- return "Title: Blinker\n"
- + "Author: Arthur van Hoff\n"
- + "Displays multicolored blinking text.";
- }
-
- public String[][] getParameterInfo() {
- String pinfo[][] = {
- {"speed", "string", "The blink frequency"},
- {"lbl", "string", "The text to blink."},
- };
- return pinfo;
- }
- }
-