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Capturing the current window's cotents?

Posts: 8
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I have a dynamic portlet page which contains a lot of data plus one "Printer friendly" Button. When i click on this button one jsp pop-up window will come with the print data and a "Print" button. When i click on Print button it will open print dialog box and i can print the data.

The problem is i want to print the jsp pop-up windows's contents directly in LANDSCAPE mode without changing the printer options.I am using java.awt.print API for this.

For Api i want to capture the the jsp pop-up windows's contents.Is thr any way to get the current window's(here jsp pop-up window) contents???

It would be great if you provide some sample codes..

Thanks in advance
[ December 21, 2005: Message edited by: Bear Bibeault ]
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How are you using the java.awt.print API?
Do you have an applet on the page?
Maria James
Posts: 8
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Hi Ben

I am not using any applets.I am trying to pass the url to a function.

This is a working program.It prints the contents of the site http://www.freefulltext.com in landscape mode.

/// it will print d contents of the site http://www.freefulltext.com

package test;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.net.URLConnection;
import java.util.StringTokenizer;
import javax.swing.JEditorPane;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.ChangedCharSetException;
import javax.swing.text.Document;
import javax.swing.text.Element;
import javax.swing.text.ElementIterator;
import javax.swing.text.PlainDocument;
import javax.swing.text.StyleConstants;
import javax.swing.text.View;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.parser.ParserDelegator;

class DocumentRenderer implements Printable {
/* DocumentRenderer prints objects of type Document. Text attributes, including
fonts, color, and small icons, will be rendered to a printed page.
DocumentRenderer computes line breaks, paginates, and performs other

An HTMLDocument is printed by sending it as an argument to the
print(HTMLDocument) method. A PlainDocument is printed the same way. Other
types of documents must be sent in a JEditorPane as an argument to the
print(JEditorPane) method. Printing Documents in this way will automatically
display a print dialog.

As objects which implement the Printable Interface, instances of the
DocumentRenderer class can also be used as the argument in the setPrintable
method of the PrinterJob class. Instead of using the print() methods
detailed above, a programmer may gain access to the formatting capabilities
of this class without using its print dialog by creating an instance of
DocumentRenderer and setting the document to be printed with the
setDocument() or setJEditorPane(). The Document may then be printed by
setting the instance of DocumentRenderer in any PrinterJob.
protected int currentPage = -1; //Used to keep track of when
//the page to print changes.

protected JEditorPane jeditorPane; //Container to hold the
//Document. This object will
//be used to lay out the
//Document for printing.

protected double pageEndY = 0; //Location of the current page

protected double pageStartY = 0; //Location of the current page

protected boolean scaleWidthToFit = true; //boolean to allow control over
//whether pages too wide to fit
//on a page will be scaled.

/* The DocumentRenderer class uses pFormat and pJob in its methods. Note
that pFormat is not the variable name used by the print method of the
DocumentRenderer. Although it would always be expected to reference the
pFormat object, the print method gets its PageFormat as an argument.
protected PageFormat pFormat;
protected PrinterJob pJob;

/* The constructor initializes the pFormat and PJob variables.
public DocumentRenderer() {
pFormat = new PageFormat();
pJob = PrinterJob.getPrinterJob();

/* Method to get the current Document
public Document getDocument() {
if (jeditorPane != null) return jeditorPane.getDocument();
else return null;

/* Method to get the current choice the width scaling option.
public boolean getScaleWidthToFit() {
return scaleWidthToFit;

/* pageDialog() displays a page setup dialog.
public void pageDialog() {
pFormat = pJob.pageDialog(pFormat);

/* The print method implements the Printable interface. Although Printables
may be called to render a page more than once, each page is painted in
order. We may, therefore, keep track of changes in the page being rendered
by setting the currentPage variable to equal the pageIndex, and then
comparing these variables on subsequent calls to this method. When the two
variables match, it means that the page is being rendered for the second or
third time. When the currentPage differs from the pageIndex, a new page is
being requested.

The highlights of the process used print a page are as follows:

I. The Graphics object is cast to a Graphics2D object to allow for
II. The JEditorPane is laid out using the width of a printable page.
This will handle line breaks. If the JEditorPane cannot be sized at
the width of the graphics clip, scaling will be allowed.
III. The root view of the JEditorPane is obtained. By examining this root
view and all of its children, printView will be able to determine
the location of each printable element of the document.
IV. If the scaleWidthToFit option is chosen, a scaling ratio is
determined, and the graphics2D object is scaled.
V. The Graphics2D object is clipped to the size of the printable page.
VI. currentPage is checked to see if this is a new page to render. If so,
pageStartY and pageEndY are reset.
VII. To match the coordinates of the printable clip of graphics2D and the
allocation rectangle which will be used to lay out the views,
graphics2D is translated to begin at the printable X and Y
coordinates of the graphics clip.
VIII. An allocation Rectangle is created to represent the layout of the

The Printable Interface always prints the area indexed by reference
to the Graphics object. For instance, with a standard 8.5 x 11 inch
page with 1 inch margins the rectangle X = 72, Y = 72, Width = 468,
and Height = 648, the area 72, 72, 468, 648 will be painted regardless
of which page is actually being printed.

To align the allocation Rectangle with the graphics2D object two
things are done. The first step is to translate the X and Y
coordinates of the graphics2D object to begin at the X and Y
coordinates of the printable clip, see step VII. Next, when printing
other than the first page, the allocation rectangle must start laying
out in coordinates represented by negative numbers. After page one,
the beginning of the allocation is started at minus the page end of
the prior page. This moves the part which has already been rendered to
before the printable clip of the graphics2D object.

X. The printView method is called to paint the page. Its return value
will indicate if a page has been rendered.

Although public, print should not ordinarily be called by programs other
than PrinterJob.
public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) {
double scale = 1.0;
Graphics2D graphics2D;
View rootView;
// I
graphics2D = (Graphics2D) graphics;
// II
jeditorPane.setSize((int) pageFormat.getImageableWidth(),Integer.MAX_VALUE);
// III
rootView = jeditorPane.getUI().getRootView(jeditorPane);
// IV
if ((scaleWidthToFit) && (jeditorPane.getMinimumSize().getWidth() >
pageFormat.getImageableWidth())) {
scale = pageFormat.getImageableWidth()/
// V
graphics2D.setClip((int) (pageFormat.getImageableX()/scale),
(int) (pageFormat.getImageableY()/scale),
(int) (pageFormat.getImageableWidth()/scale),
(int) (pageFormat.getImageableHeight()/scale));
// VI
if (pageIndex > currentPage) {
currentPage = pageIndex;
pageStartY += pageEndY;
pageEndY = graphics2D.getClipBounds().getHeight();
// VII
Rectangle allocation = new Rectangle(0,
(int) -pageStartY,
(int) (jeditorPane.getMinimumSize().getWidth()),
(int) (jeditorPane.getPreferredSize().getHeight()));
// X
if (printView(graphics2D,allocation,rootView)) {
return Printable.PAGE_EXISTS;
else {
pageStartY = 0;
pageEndY = 0;
currentPage = -1;
return Printable.NO_SUCH_PAGE;

/* print(HTMLDocument) is called to set an HTMLDocument for printing.
public void print(HTMLDocument htmlDocument) {

/* print(JEditorPane) prints a Document contained within a JEDitorPane.
public void print(JEditorPane jedPane) {

/* print(PlainDocument) is called to set a PlainDocument for printing.
public void print(PlainDocument plainDocument) {

/* A protected method, printDialog(), displays the print dialog and initiates
printing in response to user input.
protected void printDialog() {
if (pJob.printDialog()) {
try {
catch (PrinterException printerException) {
pageStartY = 0;
pageEndY = 0;
currentPage = -1;
System.out.println("Error Printing Document");

/* printView is a recursive method which iterates through the tree structure
of the view sent to it. If the view sent to printView is a branch view,
that is one with children, the method calls itself on each of these
children. If the view is a leaf view, that is a view without children which
represents an actual piece of text to be painted, printView attempts to
render the view to the Graphics2D object.

I. When any view starts after the beginning of the current printable
page, this means that there are pages to print and the method sets
pageExists to true.
II. When a leaf view is taller than the printable area of a page, it
cannot, of course, be broken down to fit a single page. Such a View
will be printed whenever it intersects with the Graphics2D clip.
III. If a leaf view intersects the printable area of the graphics clip and
fits vertically within the printable area, it will be rendered.
IV. If a leaf view does not exceed the printable area of a page but does
not fit vertically within the Graphics2D clip of the current page, the
method records that this page should end at the start of the view.
This information is stored in pageEndY.
protected boolean printView(Graphics2D graphics2D, Shape allocation,
View view) {
boolean pageExists = false;
Rectangle clipRectangle = graphics2D.getClipBounds();
Shape childAllocation;
View childView;

if (view.getViewCount() > 0) {
for (int i = 0; i < view.getViewCount(); i++) {
childAllocation = view.getChildAllocation(i,allocation);
if (childAllocation != null) {
childView = view.getView(i);
if (printView(graphics2D,childAllocation,childView)) {
pageExists = true;
} else {
// I
if (allocation.getBounds().getMaxY() >= clipRectangle.getY()) {
pageExists = true;
// II
if ((allocation.getBounds().getHeight() > clipRectangle.getHeight()) &&
(allocation.intersects(clipRectangle))) {
} else {
// III
if (allocation.getBounds().getY() >= clipRectangle.getY()) {
if (allocation.getBounds().getMaxY() <= clipRectangle.getMaxY()) {
} else {
// IV
if (allocation.getBounds().getY() < pageEndY) {
pageEndY = allocation.getBounds().getY();
return pageExists;

/* Method to set the content type the JEditorPane.
protected void setContentType(String type) {

/* Method to set an HTMLDocument as the Document to print.
public void setDocument(HTMLDocument htmlDocument) {
jeditorPane = new JEditorPane();

/* Method to set the Document to print as the one contained in a JEditorPane.
This method is useful when Java does not provide direct access to a
particular Document type, such as a Rich Text Format document. With this
method such a document can be sent to the DocumentRenderer class enclosed
in a JEditorPane.
public void setDocument(JEditorPane jedPane) {
jeditorPane = new JEditorPane();

/* Method to set a PlainDocument as the Document to print.
public void setDocument(PlainDocument plainDocument) {
jeditorPane = new JEditorPane();

/* Method to set the content type and document of the JEditorPane.
protected void setDocument(String type, Document document) {

/* Method to set the current choice of the width scaling option.
public void setScaleWidthToFit(boolean scaleWidth) {
scaleWidthToFit = scaleWidth;

public class Print1{
// HTMLDocumentLoader loader;

public static void main(String[] args){

DocumentRenderer DocumentRenderer = new DocumentRenderer();

URL url = new URL("http://www.freefulltext.com/";);

//URL url = new URL(urlString);
URLConnection connection = url.openConnection();
InputStream is = connection.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);

// Create empty HTMLDocument to read into
HTMLEditorKit htmlKit = new HTMLEditorKit();
HTMLDocument htmlDoc = (HTMLDocument)htmlKit.createDefaultDocument();
// Create parser (javax.swing.text.html.parser.ParserDelegator)
HTMLEditorKit.Parser parser = new ParserDelegator();
// Get parser callback from document
HTMLEditorKit.ParserCallback callback = htmlDoc.getReader(0);
// Load it (true means to ignore character set)
parser.parse(br, callback, true);


}catch(Exception e){System.out.println("error");}


}this function will take argument as HTTPdocument. So i want to pass the current page's contents as a url.Is it possible?

Ben Souther
Posts: 13411
Firefox Browser VI Editor Redhat
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If you're going to post more than a line or two of your code, please use the UBB Tags. Doing so will preserve your indenting which makes the code much easier to read. The easier it is to read, the more likely people are to actually read it and give you help.
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Normally "Print" buttons in web pages are implemented in Javascript. Here's a tutorial I picked at random from my internet search for "javascript print" (I don't know much about Javascript):


Apparently this opens the "Print" dialog box, where the user can print in landscape mode if they want.
A timing clock, fuse wire, high explosives and a tiny ad:
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