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<!--
Document : examples
Created on : Jan 4, 2008, 12:55:19 PM
Author : joshy
-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="common.css"/>
</head>
<body>
<h2>Examples</h2>
<h3>How do I show a PDF in my Swing Application</h3>
<p>Here is some simple code adapted from the viewer demo which will
show a PDF in a JFrame. This uses the PagePanel class from the viewer
demo, which handles all of the details of repainting the pdf in a
JPanel.</p>
<pre class="code-sample"><code>package pdfpaneltest;
import com.sun.pdfview.PDFFile;
import com.sun.pdfview.PDFPage;
import com.sun.pdfview.PagePanel;
import java.io.*;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import javax.swing.*;
/**
* An example of using the PagePanel class to show PDFs. For more advanced
* usage including navigation and zooming, look ad the
* com.sun.pdfview.PDFViewer class.
*
* @author joshua.marinacci@sun.com
*/
public class Main {
public static void setup() throws IOException {
//set up the frame and panel
JFrame frame = new JFrame("PDF Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
<span class="code-highlight">PagePanel panel = new PagePanel();</span>
frame.add(panel);
frame.pack();
frame.setVisible(true);
//load a pdf from a byte buffer
<span class="code-highlight">File file = new File("test.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);</span>
// show the first page
<span class="code-highlight">PDFPage page = pdffile.getPage(0);
panel.showPage(page);</span>
}
public static void main(final String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
Main.setup();
} catch (IOException ex) {
ex.printStackTrace();
}
}
});
}
}
</code></pre>
<h3>How do I draw a PDF into an Image?</h3>
<p>Here is some sample code to draw a PDF into an image.</p>
<pre class="code-sample"><code>package pdfpaneltest;
import com.sun.pdfview.PDFFile;
import com.sun.pdfview.PDFPage;
import java.awt.Image;
import java.awt.Rectangle;
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 void setup() throws IOException {
//load a pdf from a byte buffer
File file = new File("test.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);
// draw the first page to an image
PDFPage page = pdffile.getPage(0);
//get the width and height for the doc at the default zoom
<span class="code-highlight">Rectangle rect = new Rectangle(0,0,
(int)page.getBBox().getWidth(),
(int)page.getBBox().getHeight());</span>
//generate the image
<span class="code-highlight">Image img = page.getImage(
rect.width, rect.height, //width & height
rect, // clip rect
null, // null for the ImageObserver
true, // fill background with white
true // block until drawing is done
);</span>
//show the image in a frame
JFrame frame = new JFrame("PDF Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new JLabel(new ImageIcon(img)));
frame.pack();
frame.setVisible(true);
}
public static void main(final String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
ImageMain.setup();
} catch (IOException ex) {
ex.printStackTrace();
}
}
});
}
}
</code></pre>
<h3>How do I draw a PDF directly to my own Graphics2D object?</h3>
<p>Sometimes you may need to draw directly to some other Graphics2D object
instead of directly to an image. A common example is printing. The PDFRenderer
lets you draw directly to a Graphics2D object rather than returning an image.</p>
<p>The following code draws a pdf into the Graphics2D from a BufferedImage</p>
<pre class="code-sample"><code>
File file = new File("/Users/joshy/splats.pdf");
// set up the PDF reading
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);
// get the first page
PDFPage page = pdffile.getPage(0);
// create and configure a graphics object
BufferedImage img = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = img.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
<span class="code-highlight">// do the actual drawing
PDFRenderer renderer = new PDFRenderer(page, g2,
new Rectangle(0, 0, 500, 500), null, Color.RED);
page.waitForFinish();
renderer.run();
</span></code></pre>
</body>
</html>
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