| /* |
| * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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. |
| * |
| * - Redistributions in binary form must reproduce 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 Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * This source code is provided to illustrate the usage of a given feature |
| * or technique and has been deliberately simplified. Additional steps |
| * required for a production-quality application, such as security checks, |
| * input validation and proper error handling, might not be present in |
| * this sample code. |
| */ |
| |
| |
| |
| import java.awt.Graphics; |
| import java.awt.Font; |
| import java.applet.Applet; |
| import java.awt.event.MouseEvent; |
| import java.awt.event.MouseListener; |
| |
| |
| /** |
| * An applet that displays jittering text on the screen. |
| * |
| * @author Daniel Wyszynski 04/12/95 |
| * @author 05/09/95 kwalrath Changed string; added thread suspension |
| * @author 02/06/98 madbot removed use of suspend and resume and cleaned up |
| */ |
| @SuppressWarnings("serial") |
| public class NervousText extends Applet implements Runnable, MouseListener { |
| |
| String banner; // The text to be displayed |
| char bannerChars[]; // The same text as an array of characters |
| char attributes[]; // Character attributes ('^' for superscript) |
| Thread runner = null; // The thread that is displaying the text |
| boolean threadSuspended; // True when thread suspended (via mouse click) |
| static final int REGULAR_WD = 15; |
| static final int REGULAR_HT = 36; |
| static final int SMALL_WD = 12; |
| static final int SMALL_HT = 24; |
| Font regularFont = new Font("Serif", Font.BOLD, REGULAR_HT); |
| Font smallFont = new Font("Serif", Font.BOLD, SMALL_HT); |
| |
| @Override |
| public void init() { |
| banner = getParameter("text"); |
| if (banner == null) { |
| banner = "Java Development Kit "; |
| } |
| banner += System.getProperty("java.version", ""); |
| |
| int bannerLength = banner.length(); |
| StringBuilder bc = new StringBuilder(bannerLength); |
| StringBuilder attrs = new StringBuilder(bannerLength); |
| int wd = 0; |
| for (int i = 0; i < bannerLength; i++) { |
| char c = banner.charAt(i); |
| char a = 0; |
| if (c == '^') { |
| i++; |
| if (i < bannerLength) { |
| c = banner.charAt(i); |
| a = '^'; |
| wd += SMALL_WD - REGULAR_WD; |
| } else { |
| break; |
| } |
| } |
| bc.append(c); |
| attrs.append(a); |
| wd += REGULAR_WD; |
| } |
| |
| bannerLength = bc.length(); |
| bannerChars = new char[bannerLength]; |
| attributes = new char[bannerLength]; |
| bc.getChars(0, bannerLength, bannerChars, 0); |
| attrs.getChars(0, bannerLength, attributes, 0); |
| |
| threadSuspended = false; |
| resize(wd + 10, 50); |
| addMouseListener(this); |
| } |
| |
| @Override |
| public void destroy() { |
| removeMouseListener(this); |
| } |
| |
| @Override |
| public void start() { |
| runner = new Thread(this); |
| runner.start(); |
| } |
| |
| @Override |
| public synchronized void stop() { |
| runner = null; |
| if (threadSuspended) { |
| threadSuspended = false; |
| notify(); |
| } |
| } |
| |
| @Override |
| public void run() { |
| Thread me = Thread.currentThread(); |
| while (runner == me) { |
| try { |
| Thread.sleep(100); |
| synchronized (this) { |
| while (threadSuspended) { |
| wait(); |
| } |
| } |
| } catch (InterruptedException e) { |
| } |
| repaint(); |
| } |
| } |
| |
| @Override |
| public void paint(Graphics g) { |
| int length = bannerChars.length; |
| for (int i = 0, x = 0; i < length; i++) { |
| int wd, ht; |
| if (attributes[i] == '^') { |
| wd = SMALL_WD; |
| ht = SMALL_HT; |
| g.setFont(smallFont); |
| } else { |
| wd = REGULAR_WD; |
| ht = REGULAR_HT; |
| g.setFont(regularFont); |
| } |
| int px = (int) (10 * Math.random() + x); |
| int py = (int) (10 * Math.random() + ht); |
| g.drawChars(bannerChars, i, 1, px, py); |
| x += wd; |
| } |
| } |
| |
| @Override |
| public synchronized void mousePressed(MouseEvent e) { |
| e.consume(); |
| threadSuspended = !threadSuspended; |
| if (!threadSuspended) { |
| notify(); |
| } |
| } |
| |
| @Override |
| public void mouseReleased(MouseEvent e) { |
| } |
| |
| @Override |
| public void mouseEntered(MouseEvent e) { |
| } |
| |
| @Override |
| public void mouseExited(MouseEvent e) { |
| } |
| |
| @Override |
| public void mouseClicked(MouseEvent e) { |
| } |
| |
| @Override |
| public String getAppletInfo() { |
| return "Title: NervousText\nAuthor: Daniel Wyszynski\n" |
| + "Displays a text banner that jitters."; |
| } |
| |
| @Override |
| public String[][] getParameterInfo() { |
| String pinfo[][] = { |
| { "text", "string", "Text to display" }, }; |
| return pinfo; |
| } |
| } |