Blink.java revision 0
0N/A/*
0N/A * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
0N/A *
0N/A * Redistribution and use in source and binary forms, with or without
0N/A * modification, are permitted provided that the following conditions
0N/A * are met:
0N/A *
0N/A * - Redistributions of source code must retain the above copyright
0N/A * notice, this list of conditions and the following disclaimer.
0N/A *
0N/A * - Redistributions in binary form must reproduce the above copyright
0N/A * notice, this list of conditions and the following disclaimer in the
0N/A * documentation and/or other materials provided with the distribution.
0N/A *
0N/A * - Neither the name of Sun Microsystems nor the names of its
0N/A * contributors may be used to endorse or promote products derived
0N/A * from this software without specific prior written permission.
0N/A *
0N/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
0N/A * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
0N/A * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
0N/A * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
0N/A * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
0N/A * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
0N/A * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
0N/A * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
0N/A * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
0N/A * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
0N/A * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0N/A */
0N/A
0N/A/*
0N/A */
0N/A
0N/A/**
0N/A * I love blinking things.
0N/A *
0N/A * @author Arthur van Hoff
0N/A * @modified 04/24/96 Jim Hagen use getBackground
0N/A * @modified 02/05/98 Mike McCloskey removed use of deprecated methods
0N/A * @modified 04/23/99 Josh Bloch, use timer instead of explicit multithreading.
0N/A * @modified 07/10/00 Daniel Peek brought to code conventions, minor changes
0N/A */
0N/A
0N/Aimport java.awt.*;
0N/Aimport java.util.*;
0N/A
0N/Apublic class Blink extends java.applet.Applet {
0N/A private Timer timer; // Schedules the blinking
0N/A private String labelString; // The label for the window
0N/A private int delay; // the delay time between blinks
0N/A
0N/A public void init() {
0N/A String blinkFrequency = getParameter("speed");
0N/A delay = (blinkFrequency == null) ? 400 :
0N/A (1000 / Integer.parseInt(blinkFrequency));
0N/A labelString = getParameter("lbl");
0N/A if (labelString == null)
0N/A labelString = "Blink";
0N/A Font font = new java.awt.Font("Serif", Font.PLAIN, 24);
0N/A setFont(font);
0N/A }
0N/A
0N/A public void start() {
0N/A timer = new Timer(); //creates a new timer to schedule the blinking
0N/A timer.schedule(new TimerTask() { //creates a timertask to schedule
0N/A // overrides the run method to provide functionality
0N/A public void run() {
0N/A repaint();
0N/A }
0N/A }
0N/A , delay, delay);
0N/A }
0N/A
0N/A public void paint(Graphics g) {
0N/A int fontSize = g.getFont().getSize();
0N/A int x = 0, y = fontSize, space;
0N/A int red = (int) ( 50 * Math.random());
0N/A int green = (int) ( 50 * Math.random());
0N/A int blue = (int) (256 * Math.random());
0N/A Dimension d = getSize();
0N/A g.setColor(Color.black);
0N/A FontMetrics fm = g.getFontMetrics();
0N/A space = fm.stringWidth(" ");
0N/A for (StringTokenizer t = new StringTokenizer(labelString);
0N/A t.hasMoreTokens();) {
0N/A String word = t.nextToken();
0N/A int w = fm.stringWidth(word) + space;
0N/A if (x + w > d.width) {
0N/A x = 0;
0N/A y += fontSize; //move word to next line if it doesn't fit
0N/A }
0N/A if (Math.random() < 0.5)
0N/A g.setColor(new java.awt.Color((red + y*30) % 256,
0N/A (green + x/3) % 256, blue));
0N/A else
0N/A g.setColor(getBackground());
0N/A g.drawString(word, x, y);
0N/A x += w; //shift to the right to draw the next word
0N/A }
0N/A }
0N/A
0N/A public void stop() {
0N/A timer.cancel(); //stops the timer
0N/A }
0N/A
0N/A public String getAppletInfo() {
0N/A return "Title: Blinker\n"
0N/A + "Author: Arthur van Hoff\n"
0N/A + "Displays multicolored blinking text.";
0N/A }
0N/A
0N/A public String[][] getParameterInfo() {
0N/A String pinfo[][] = {
0N/A {"speed", "string", "The blink frequency"},
0N/A {"lbl", "string", "The text to blink."},
0N/A };
0N/A return pinfo;
0N/A }
0N/A}