Mega Code Archive
Pagination during print
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/*
* Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved.
*
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*
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*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
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* 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
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*/
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.UIManager;
public class PaginationExample implements Printable, ActionListener {
int[] pageBreaks; // array of page break line positions.
/* Synthesise some sample lines of text */
String[] textLines;
private void initTextLines() {
if (textLines == null) {
int numLines = 200;
textLines = new String[numLines];
for (int i = 0; i < numLines; i++) {
textLines[i] = "This is line number " + i;
}
}
}
public int print(Graphics g, PageFormat pf, int pageIndex)
throws PrinterException {
Font font = new Font("Serif", Font.PLAIN, 10);
FontMetrics metrics = g.getFontMetrics(font);
int lineHeight = metrics.getHeight();
if (pageBreaks == null) {
initTextLines();
int linesPerPage = (int) (pf.getImageableHeight() / lineHeight);
int numBreaks = (textLines.length - 1) / linesPerPage;
pageBreaks = new int[numBreaks];
for (int b = 0; b < numBreaks; b++) {
pageBreaks[b] = (b + 1) * linesPerPage;
}
}
if (pageIndex > pageBreaks.length) {
return NO_SUCH_PAGE;
}
/*
* User (0,0) is typically outside the imageable area, so we must translate
* by the X and Y values in the PageFormat to avoid clipping Since we are
* drawing text we
*/
Graphics2D g2d = (Graphics2D) g;
g2d.translate(pf.getImageableX(), pf.getImageableY());
/*
* Draw each line that is on this page. Increment 'y' position by lineHeight
* for each line.
*/
int y = 0;
int start = (pageIndex == 0) ? 0 : pageBreaks[pageIndex - 1];
int end = (pageIndex == pageBreaks.length) ? textLines.length
: pageBreaks[pageIndex];
for (int line = start; line < end; line++) {
y += lineHeight;
g.drawString(textLines[line], 0, y);
}
/* tell the caller that this page is part of the printed document */
return PAGE_EXISTS;
}
public void actionPerformed(ActionEvent e) {
PrinterJob job = PrinterJob.getPrinterJob();
job.setPrintable(this);
boolean ok = job.printDialog();
if (ok) {
try {
job.print();
} catch (PrinterException ex) {
/* The job did not successfully complete */
}
}
}
public static void main(String args[]) {
try {
String cn = UIManager.getSystemLookAndFeelClassName();
UIManager.setLookAndFeel(cn); // Use the native L&F
} catch (Exception cnf) {
}
JFrame f = new JFrame("Printing Pagination Example");
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
JButton printButton = new JButton("Print Pages");
printButton.addActionListener(new PaginationExample());
f.add("Center", printButton);
f.pack();
f.setVisible(true);
}
}
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