/* * @(#)Blink.java 1.6 99/08/17 * * Copyright (c) 1997, 1998 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. */ /** * 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. */ import java.awt.*; import java.util.*; public class Blink extends java.applet.Applet { Timer timer; String labelString; // The label for the window 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("TimesRoman", Font.PLAIN, 24); setFont(font); } 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; } 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; } } public void start() { timer = new Timer(); timer.schedule(new TimerTask() { public void run() {repaint();} }, delay, delay); } public void stop() { timer.cancel(); } public String getAppletInfo() { return "Title: Blinker\nAuthor: Arthur van Hoff\nDisplays multicolored blinking text."; } public String[][] getParameterInfo() { String pinfo[][] = { {"speed", "string", "The blink frequency"}, {"lbl", "string", "The text to blink."}, }; return pinfo; } }