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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.
*/
/*
* 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.
*/
/**
* I love blinking things.
*
* @author Arthur van Hoff
* @author 04/24/96 Jim Hagen use getBackground
* @author 02/05/98 Mike McCloskey removed use of deprecated methods
* @author 04/23/99 Josh Bloch, use timer instead of explicit multithreading.
* @author 07/10/00 Daniel Peek brought to code conventions, minor changes
*/
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.util.StringTokenizer;
import java.util.Timer;
import java.util.TimerTask;
public class Blink extends java.applet.Applet {
private static final long serialVersionUID = -775844794477507646L;
private Timer timer; // Schedules the blinking
private String labelString; // The label for the window
private int delay; // the delay time between blinks
@Override
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);
}
@Override
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
@Override
public void run() {
repaint();
}
}, delay, delay);
}
@Override
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
}
}
@Override
public void stop() {
timer.cancel(); //stops the timer
}
@Override
public String getAppletInfo() {
return "Title: Blinker\n"
+ "Author: Arthur van Hoff\n"
+ "Displays multicolored blinking text.";
}
@Override
public String[][] getParameterInfo() {
String pinfo[][] = {
{ "speed", "string", "The blink frequency" },
{ "lbl", "string", "The text to blink." }, };
return pinfo;
}
}
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