Ecco questo è il codice della mi classe se dai una occhiata nel codice.
codice:
import com.sun.pdfview.PDFFile;
import com.sun.pdfview.PDFPage;
import com.sun.pdfview.PDFRenderer;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.*;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import javax.swing.*;
/**
* An example of drawing a PDF to an image.
*
* @author joshua.marinacci@sun.com
*/
public class ImageMain {
public static int numeroPagine;
public static int i;
public static void setup() throws IOException {
i=1;
final JFrame frame2 = new JFrame("PDF Test");
frame2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//load a pdf from a byte buffer
final JInternalFrame frame = new JInternalFrame("PDF Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final File file = new File("c:/m.pdf");
final RandomAccessFile raf = new RandomAccessFile(file, "r");
final FileChannel channel = raf.getChannel();
final ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
final PDFFile pdffile = new PDFFile(buf);
numeroPagine = pdffile.getNumPages();
// draw the first page to an image
PDFPage page = pdffile.getPage(0);
final BufferedImage img = new BufferedImage((int)page.getBBox().getWidth(),
(int)page.getBBox().getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = img.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
//get the width and height for the doc at the default zoom
Rectangle rect = new Rectangle(0,0,
(int)page.getBBox().getWidth(),
(int)page.getBBox().getHeight());
try{
//generate the image
PDFRenderer renderer = new PDFRenderer(page, g2,
new Rectangle(0, 0, (int)page.getBBox().getWidth(),
(int)page.getBBox().getHeight()), null, Color.white);
page.waitForFinish();
renderer.run();
}catch(Exception e){}
final JButton Botton = new JButton("Avanti");
Botton.setSize( Botton.getPreferredSize() );
frame2.add(Botton);
Botton.addActionListener( new ActionListener() {
public void actionPerformed( ActionEvent e ) {
if(i>numeroPagine){
Botton.setEnabled(false);
}
else{
try{
i++;
// File file = new File("c:/m.pdf");
// RandomAccessFile raf = new RandomAccessFile(file, "r");
// FileChannel channel = raf.getChannel();
// ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
//PDFFile pdffile = new PDFFile(buf);
PDFPage page2 = pdffile.getPage(i);
BufferedImage img = new BufferedImage((int)page2.getBBox().getWidth(),
(int)page2.getBBox().getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = img.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
//get the width and height for the doc at the default zoom
Rectangle rect = new Rectangle(0,0,
(int)page2.getBBox().getWidth(),
(int)page2.getBBox().getHeight());
//generate the image
PDFRenderer renderer = new PDFRenderer(page2, g2,
new Rectangle(0, 0, (int)page2.getBBox().getWidth(),
(int)page2.getBBox().getHeight()), null, Color.white);
page2.waitForFinish();
renderer.run();
frame.add(new JLabel(new ImageIcon(img)));
frame.validate();
}catch(Exception r){}
System.out.println("sono arrivato");
//frame2.removeAll();
// frame2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// frame.removeAll();
// frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
});
//show the image in a frame
frame.add(new JLabel(new ImageIcon(img)));
frame.pack();
frame.setVisible(true);
frame2.add(frame);
frame2.pack();
frame2.setVisible(true);
}
public static void main(final String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
ImageMain.setup();
} catch (IOException ex) {
ex.printStackTrace();
}
}
});
}
}
Come si può notare la prima pagine viene caricata correttamente purtroppo cliccando sul pulsante avanti invece non compare nulla.
Volevo sapere c'è qualche modo per poter aggiornare il contenuto di un oggetto di tipo JInternalFrame???
Rispondi quotando
Sì, ho visto il tuo codice e secondo me ti stai complicando la vita.