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/*
* 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.
*/
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 = "HotJava";
}
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;
}
}
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