worka

After using the PrintUtilities class in my previous post I found it was a bit rough in places so I've made some improvements.

The component is now scaled to the page width and there is a away to set a title that is drawn on the printed output. The title stuff is a little limited, one line only, no font control etc. But it does what I need it to do for the moment.

package au.com.phasefale.utils.printing;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;

import javax.swing.RepaintManager;

/**
 * 
 * PrintUtilities
 * 
 * Originally taken from
 * http://www.apl.jhu.edu/~hall/java/Swing-Tutorial/Swing-Tutorial-Printing.html
 * 
 * Improved so that component is scaled to page width. Title can be added to the top of the printed
 * output.
 * 
 * Created On: 11/10/2005
 * 
 */

public class PrintUtilities implements Printable {
 private Component componentToBePrinted;
 private String titleForComponent;

 public static void printComponent(Component c) {
  new PrintUtilities(c).print();
 }

 public PrintUtilities(Component componentToBePrinted) {
  this.componentToBePrinted = componentToBePrinted;
 }

 public PrintUtilities(Component componentToBePrinted, String title) {
  this.componentToBePrinted = componentToBePrinted;
  this.titleForComponent = title;
 }

 public void setTitle(String title) {
  this.titleForComponent = title;
 }

 public void print() {
  PrinterJob printJob = PrinterJob.getPrinterJob();
  printJob.setPrintable(this);
  if (printJob.printDialog())
   try {
    printJob.print();
   } catch (PrinterException pe) {
    System.out.println("Error printing: " + pe);
   }
 }

 public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
  if (pageIndex > 0) {
   return (NO_SUCH_PAGE);
  } else {
   Graphics2D g2 = (Graphics2D) g;

   g2.setColor(Color.black);
   int fontHeight = (titleForComponent == null) ? 0 : g2.getFontMetrics().getHeight();
   int fontDesent = (titleForComponent == null) ? 0 : g2.getFontMetrics().getDescent();
   int stringWidth = (titleForComponent == null) ? 0 : (int) g2.getFontMetrics()
     .getStringBounds(titleForComponent, g2).getWidth();

   // double pageHeight = pageFormat.getImageableHeight() - fontHeight;
   double pageWidth = pageFormat.getImageableWidth();
   double componentWidth = (double) componentToBePrinted.getWidth();
   double scale = 1;
   if (componentWidth >= pageWidth) {
    scale = pageWidth / componentWidth;
   }

   g2.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
   if (titleForComponent != null) {
    int x = (int) pageWidth / 2 - stringWidth / 2;
    int y = fontHeight;
    g2.drawString(titleForComponent, x, y);
    g2.translate(0, y + fontDescent);

    // The following print string at bottom of page
    // no need to translate either
    // g2.drawString(titleForComponent, (int) pageWidth / 2 - stringWidth / 2,
    // (int) (pageHeight + fontHeight - fontDesent));
   }

   g2.scale(scale, scale);
   disableDoubleBuffering(componentToBePrinted);
   componentToBePrinted.paint(g2);
   enableDoubleBuffering(componentToBePrinted);
   return (PAGE_EXISTS);
  }
 }

 public static void disableDoubleBuffering(Component c) {
  RepaintManager currentManager = RepaintManager.currentManager(c);
  currentManager.setDoubleBufferingEnabled(false);
 }

 public static void enableDoubleBuffering(Component c) {
  RepaintManager currentManager = RepaintManager.currentManager(c);
  currentManager.setDoubleBufferingEnabled(true);
 }
}