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/*
* Copyright (c) 1995 - 2008 Sun Microsystems, Inc. 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 Sun Microsystems 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.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import javax.swing.*;
import java.util.Random;
class JumbledImage extends Component {
private int numlocs = 2;
private int numcells = numlocs*numlocs;
private int[] cells;
private BufferedImage bi;
int w, h, cw, ch;
public JumbledImage(URL imageSrc) {
try {
bi = ImageIO.read(imageSrc);
w = bi.getWidth(null);
h = bi.getHeight(null);
} catch (IOException e) {
System.out.println("Image could not be read");
System.exit(1);
}
cw = w/numlocs;
ch = h/numlocs;
cells = new int[numcells];
for (int i=0;i<numcells;i++) {
cells[i] = i;
}
}
void jumble() {
Random rand = new Random();
int ri;
for (int i=0; i<numcells; i++) {
while ((ri = rand.nextInt(numlocs)) == i);
int tmp = cells[i];
cells[i] = cells[ri];
cells[ri] = tmp;
}
}
public Dimension getPreferredSize() {
return new Dimension(w, h);
}
public void paint(Graphics g) {
int dx, dy;
for (int x=0; x<numlocs; x++) {
int sx = x*cw;
for (int y=0; y<numlocs; y++) {
int sy = y*ch;
int cell = cells[x*numlocs+y];
dx = (cell / numlocs) * cw;
dy = (cell % numlocs) * ch;
g.drawImage(bi,
dx, dy, dx+cw, dy+ch,
sx, sy, sx+cw, sy+ch,
null);
}
}
}
}
public class JumbledImageApplet extends JApplet {
static String imageFileName = "duke_skateboard.jpg";
private URL imageSrc;
private JumbledImage jumbledImage;
public JumbledImageApplet () {
}
public JumbledImageApplet (URL imageSrc) {
this.imageSrc = imageSrc;
}
public void init() {
try {
imageSrc = new URL(getCodeBase(), imageFileName);
} catch (MalformedURLException e) {
}
buildUI();
}
public void buildUI() {
final JumbledImage ji = new JumbledImage(imageSrc);
add("Center", ji);
JButton jumbleButton = new JButton("Jumble");
jumbleButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JButton b = (JButton)e.getSource();
ji.jumble();
ji.repaint();
};
});
Dimension jumbleSize = ji.getPreferredSize();
resize(jumbleSize.width, jumbleSize.height+40);
add("South", jumbleButton);
}
public static void main(String s[]) {
JFrame f = new JFrame("Jumbled Image");
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
});
URL imageSrc = null;
try {
imageSrc = ((new File(imageFileName)).toURI()).toURL();
} catch (MalformedURLException e) {
}
JumbledImageApplet jumbler = new JumbledImageApplet(imageSrc);
jumbler.buildUI();
f.add("Center", jumbler);
f.pack();
f.setVisible(true);
}
}
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