/*
* $Id$
*
* This code is part of the 'iText Tutorial'.
* You can find the complete tutorial at the following address:
* http://itextdocs.lowagie.com/tutorial/
*
* This code 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.
*
* itext-questions@lists.sourceforge.net
*/
package com.lowagie.examples.directcontent.pageevents;
import java.awt.Color;
import java.io.FileOutputStream;
import com.lowagie.text.Chunk;
import com.lowagie.text.LwgDocument;
import com.lowagie.text.LwgElement;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.LwgFont;
import com.lowagie.text.LwgImage;
import com.lowagie.text.LwgPageSize;
import com.lowagie.text.Paragraph;
import com.lowagie.text.LwgPhrase;
import com.lowagie.text.LwgRectangle;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfGState;
import com.lowagie.text.pdf.LwgPdfPTable;
import com.lowagie.text.pdf.PdfPageEventHelper;
import com.lowagie.text.pdf.PdfTemplate;
import com.lowagie.text.pdf.PdfWriter;
/**
* Demonstrates the use of templates to add Watermarks and Pagenumbers.
*/
public class PageNumbersWatermark extends PdfPageEventHelper {
/** An LwgImage that goes in the header. */
public LwgImage headerImage;
/** The headertable. */
public LwgPdfPTable table;
/** The Graphic state */
public PdfGState gstate;
/** A template that will hold the total number of pages. */
public PdfTemplate tpl;
/** The font that will be used. */
public BaseFont helv;
/**
* Generates a document with a header containing Page x of y and with a Watermark on every page.
* @param args no arguments needed
*/
public static void main(String args[]) {
try {
// step 1: creating the document
LwgDocument doc = new LwgDocument(LwgPageSize.A4, 50, 50, 100, 72);
// step 2: creating the writer
PdfWriter writer = PdfWriter.getInstance(doc, new FileOutputStream("pageNumbersWatermark.pdf"));
// step 3: initialisations + opening the document
writer.setPageEvent(new PageNumbersWatermark());
doc.open();
// step 4: adding content
String text = "some padding text ";
for (int k = 0; k < 10; ++k)
text += text;
Paragraph p = new Paragraph(text);
p.setAlignment(LwgElement.ALIGN_JUSTIFIED);
doc.add(p);
// step 5: closing the document
doc.close();
}
catch ( Exception e ) {
e.printStackTrace();
}
}
/**
* @see com.lowagie.text.pdf.PdfPageEventHelper#onOpenDocument(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
*/
public void onOpenDocument(PdfWriter writer, LwgDocument document) {
try {
// initialization of the header table
headerImage = LwgImage.getInstance("logo.gif");
table = new LwgPdfPTable(2);
LwgPhrase p = new LwgPhrase();
Chunk ck = new Chunk("lowagie.com\n", new LwgFont(LwgFont.TIMES_ROMAN, 16, LwgFont.BOLDITALIC, Color.blue));
p.add(ck);
ck = new Chunk("Ghent\nBelgium", new LwgFont(LwgFont.HELVETICA, 12, LwgFont.NORMAL, Color.darkGray));
p.add(ck);
table.getDefaultCell().setBackgroundColor(Color.yellow);
table.getDefaultCell().setBorderWidth(0);
table.add(p);
table.getDefaultCell().setHorizontalAlignment(LwgElement.ALIGN_RIGHT);
table.add(new LwgPhrase(new Chunk(headerImage, 0, 0)));
// initialization of the Graphic State
gstate = new PdfGState();
gstate.setFillOpacity(0.3f);
gstate.setStrokeOpacity(0.3f);
// initialization of the template
tpl = writer.getDirectContent().createTemplate(100, 100);
tpl.setBoundingBox(new LwgRectangle(-20, -20, 100, 100));
// initialization of the font
helv = BaseFont.createFont("Helvetica", BaseFont.WINANSI, false);
}
catch(Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* @see com.lowagie.text.pdf.PdfPageEventHelper#onEndPage(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
*/
public void onEndPage(PdfWriter writer, LwgDocument document) {
PdfContentByte cb = writer.getDirectContent();
cb.saveState();
// write the headertable
table.setTotalWidth(document.right() - document.left());
table.writeSelectedRows(0, -1, document.left(), document.getPageSize().getHeight() - 50, cb);
// compose the footer
String text = "Page " + writer.getPageNumber() + " of ";
float textSize = helv.getWidthPoint(text, 12);
float textBase = document.bottom() - 20;
cb.beginText();
cb.setFontAndSize(helv, 12);
// for odd pagenumbers, show the footer at the left
if ((writer.getPageNumber() & 1) == 1) {
cb.setTextMatrix(document.left(), textBase);
cb.showText(text);
cb.endText();
cb.addTemplate(tpl, document.left() + textSize, textBase);
}
// for even numbers, show the footer at the right
else {
float adjust = helv.getWidthPoint("0", 12);
cb.setTextMatrix(document.right() - textSize - adjust, textBase);
cb.showText(text);
cb.endText();
cb.addTemplate(tpl, document.right() - adjust, textBase);
}
cb.saveState();
// draw a LwgRectangle around the page
cb.setColorStroke(Color.orange);
cb.setLineWidth(2);
cb.rectangle(20, 20, document.getPageSize().getWidth() - 40, document.getPageSize().getHeight() - 40);
cb.stroke();
cb.restoreState();
// starting on page 3, a watermark with an LwgImage that is made transparent
if (writer.getPageNumber() >= 3) {
cb.setGState(gstate);
cb.setColorFill(Color.red);
cb.beginText();
cb.setFontAndSize(helv, 48);
cb.showTextAligned(LwgElement.ALIGN_CENTER, "Watermark Opacity " + writer.getPageNumber(), document.getPageSize().getWidth() / 2, document.getPageSize().getHeight() / 2, 45);
cb.endText();
try {
cb.addImage(headerImage, headerImage.getWidth(), 0, 0, headerImage.getHeight(), 440, 80);
}
catch(Exception e) {
throw new ExceptionConverter(e);
}
cb.restoreState();
}
cb.sanityCheck();
}
/**
* @see com.lowagie.text.pdf.PdfPageEventHelper#onStartPage(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
*/
public void onStartPage(PdfWriter writer, LwgDocument document) {
if (writer.getPageNumber() < 3) {
PdfContentByte cb = writer.getDirectContentUnder();
cb.saveState();
cb.setColorFill(Color.pink);
cb.beginText();
cb.setFontAndSize(helv, 48);
cb.showTextAligned(LwgElement.ALIGN_CENTER, "My Watermark Under " + writer.getPageNumber(), document.getPageSize().getWidth() / 2, document.getPageSize().getHeight() / 2, 45);
cb.endText();
cb.restoreState();
}
}
/**
* @see com.lowagie.text.pdf.PdfPageEventHelper#onCloseDocument(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
*/
public void onCloseDocument(PdfWriter writer, LwgDocument document) {
tpl.beginText();
tpl.setFontAndSize(helv, 12);
tpl.setTextMatrix(0, 0);
tpl.showText(Integer.toString(writer.getPageNumber() - 1));
tpl.endText();
tpl.sanityCheck();
}
}