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/*
* $Id: PDFPrintPage.java,v 1.2 2007/12/20 18:33:33 rbair Exp $
*
* Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.sun.pdfview;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import javax.swing.AbstractAction;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
/**
* A class representing a print job for a particular PDFFile. The class
* maintains a status dialog as it prints, allowing the user to cancel
* the print job.
*/
public class PDFPrintPage implements Printable
{
/** The PDFFile to be printed */
private PDFFile file;
/** The PrinterJob for this print job */
private PrinterJob pjob;
/** A dialog box indicating printing status, with cancel button */
private JDialog pd;
/** The text in the progress dialog indicating the current page */
private JLabel pagenumlabel;
/** The cancel button in the progress dialog */
private JButton cancel;
/**
* Create a new PDFPrintPage object for a particular PDFFile.
* @param file the PDFFile to be printed.
*/
public PDFPrintPage(PDFFile file) {
this.file= file;
}
/**
* Generates the status dialog with cancel button.
*/
private void createPrintDialog() {
pd= new JDialog((Frame)null, "Printing...", false);
Container top= pd.getContentPane();
Box lines= Box.createVerticalBox();
Box line= Box.createHorizontalBox();
line.add(new JLabel("Now printing: "));
JLabel title= new JLabel("file.pdf");
line.add(title);
lines.add(line);
line= Box.createHorizontalBox();
line.add(Box.createHorizontalStrut(10));
line.add(new JLabel("page "));
pagenumlabel= new JLabel("1");
line.add(pagenumlabel);
line.add(new JLabel(" of "));
JLabel totalpages= new JLabel(String.valueOf(file.getNumPages()));
line.add(totalpages);
lines.add(line);
top.add(lines, BorderLayout.CENTER);
Box cancelbox= Box.createHorizontalBox();
cancelbox.add(Box.createHorizontalGlue());
cancel= new JButton(new AbstractAction("Cancel") {
public void actionPerformed(ActionEvent evt) {
doCancel();
}
});
cancelbox.add(cancel);
top.add(cancelbox, BorderLayout.SOUTH);
}
/**
* Show the progress dialog for this print job
* @param pjob the PrinterJob representing the print job
*/
public void show(PrinterJob pjob) {
this.pjob= pjob;
if (pd==null) {
createPrintDialog();
}
pd.pack();
pd.show();
}
/**
* Close the progress dialog. Don't use this method to cancel
* the print job; use {@link #doCancel doCancel} instead.
*/
public void hide() {
pd.dispose();
}
/**
* Cancel the print job. Disables the cancel button, as it might
* take a while for the cancel to take effect.
*/
public void doCancel() {
cancel.setEnabled(false);
pjob.cancel();
}
// from Printable interface: prints a single page, given a Graphics
// to draw into, the page format, and the page number.
public int print(Graphics g, PageFormat format, int index)
throws PrinterException
{
int pagenum= index+1;
// don't bother if the page number is out of range.
if ((pagenum >= 1) && (pagenum <= file.getNumPages())) {
// update the page number in the progress dialog
if (pagenumlabel!=null) {
pagenumlabel.setText(String.valueOf(pagenum));
}
// fit the PDFPage into the printing area
Graphics2D g2= (Graphics2D)g;
PDFPage page= file.getPage(pagenum);
double pwidth= format.getImageableWidth();
double pheight= format.getImageableHeight();
double aspect= page.getAspectRatio();
double paperaspect= pwidth/pheight;
Rectangle imgbounds;
if (aspect>paperaspect) {
// paper is too tall / pdfpage is too wide
int height= (int)(pwidth/aspect);
imgbounds= new Rectangle((int)format.getImageableX(),
(int)(format.getImageableY() +
((pheight-height)/2)),
(int)pwidth, height);
} else {
// paper is too wide / pdfpage is too tall
int width= (int)(pheight*aspect);
imgbounds= new Rectangle((int)(format.getImageableX() +
((pwidth-width)/2)),
(int)format.getImageableY(),
width, (int)pheight);
}
// debugging -- frame the page with a black border, outside the
// imageable region.
//
// double ix= format.getImageableX();
// double iy= format.getImageableY();
// double iw= format.getImageableWidth();
// double ih= format.getImageableHeight();
// double tw= format.getWidth();
// double th= format.getHeight();
// g2.fill(new Rectangle2D.Double(0, 0, tw, iy));
// g2.fill(new Rectangle2D.Double(0, 0, ix, th));
// g2.fill(new Rectangle2D.Double(0, iy+ih, tw, th-iy-ih));
// g2.fill(new Rectangle2D.Double(ix+iw, 0, tw-ix-iw, th));
// render the page
PDFRenderer pgs=
new PDFRenderer(page, g2, imgbounds, null, null);
try {
page.waitForFinish();
pgs.run();
} catch (InterruptedException ie) {}
return PAGE_EXISTS;
} else {
return NO_SUCH_PAGE;
}
}
}
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