We create a file with specific /XYZ destinations and we change the zoom factor of these destinations. These examples were written in the context of questions such as:
ChangeZoomXYZDestination.java
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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2020 iText Group NV
Authors: iText Software.
For more information, please contact iText Software at this address:
sales@itextpdf.com
*/
/**
* This example was written by Bruno Lowagie in answer to the following question:
* http://stackoverflow.com/questions/22828782/all-links-of-existing-pdf-change-the-action-property-to-inherit-zoom-itext-lib
*/
package com.itextpdf.samples.sandbox.annotations;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.PdfDictionary;
import com.itextpdf.kernel.pdf.PdfName;
import com.itextpdf.kernel.pdf.PdfArray;
import com.itextpdf.kernel.pdf.PdfNumber;
import java.io.File;
public class ChangeZoomXYZDestination {
public static final String DEST = "./target/sandbox/annotations/change_zoom_xyz_destination.pdf";
public static final String SRC = "./src/test/resources/pdfs/xyz_destination.pdf";
public static void main(String[] args) throws Exception {
File file = new File(DEST);
file.getParentFile().mkdirs();
new ChangeZoomXYZDestination().manipulatePdf(DEST);
}
protected void manipulatePdf(String dest) throws Exception {
PdfDocument pdfDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(dest));
PdfDictionary pageDict = pdfDoc.getPage(11).getPdfObject();
PdfArray annots = pageDict.getAsArray(PdfName.Annots);
// Loop over the annotations
for (int i = 0; i < annots.size(); i++) {
PdfDictionary annotation = annots.getAsDictionary(i);
if (PdfName.Link.equals(annotation.getAsName(PdfName.Subtype))) {
PdfArray d = annotation.getAsArray(PdfName.Dest);
if (d != null && d.size() == 5 && PdfName.XYZ.equals(d.getAsName(1))) {
// Change the zoom factor of the current link to 0
d.set(4, new PdfNumber(0));
}
}
}
pdfDoc.close();
}
}
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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2020 iText Group NV
Authors: iText Software.
For more information, please contact iText Software at this address:
sales@itextpdf.com
*/
/**
* This example was written to create a sample file for use in code that answers the following question:
* http://stackoverflow.com/questions/22828782/all-links-of-existing-pdf-change-the-action-property-to-inherit-zoom-itext-lib
*/
package com.itextpdf.samples.sandbox.annotations;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.navigation.PdfDestination;
import com.itextpdf.kernel.pdf.navigation.PdfExplicitDestination;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.AreaBreak;
import com.itextpdf.layout.element.Link;
import com.itextpdf.layout.element.Paragraph;
import java.io.File;
public class XYZDestination {
public static final String DEST = "./target/sandbox/annotations/xyz_destination.pdf";
public static void main(String[] args) throws Exception {
File file = new File(DEST);
file.getParentFile().mkdirs();
new XYZDestination().manipulatePdf(DEST);
}
protected void manipulatePdf(String dest) throws Exception {
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
Document doc = new Document(pdfDoc);
for (int i = 0; i < 10; i++) {
doc.add(new Paragraph("Test"));
doc.add(new AreaBreak());
}
for (int i = 1; i < 11; i++) {
// Create a link destination to the page, specified in the 1st argument.
PdfDestination d = PdfExplicitDestination.createXYZ(pdfDoc.getPage(i), 36, 806, 0);
Paragraph c = new Paragraph(new Link("Goto page " + i, d));
doc.add(c);
}
doc.close();
}
}
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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2020 iText Group NV
Authors: iText Software.
For more information, please contact iText Software at this address:
sales@itextpdf.com
*/
/**
* Example written by Bruno Lowagie in answer to:
* http://stackoverflow.com/questions/24087786/how-to-set-zoom-level-to-pdf-using-itextsharp-5-5-0-0
*/
package com.itextpdf.samples.sandbox.stamper;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.navigation.PdfDestination;
import com.itextpdf.kernel.pdf.navigation.PdfExplicitDestination;
import java.io.File;
public class AddOpenAction {
public static final String SRC = "./src/test/resources/pdfs/hello.pdf";
public static final String DEST = "./target/sandbox/stamper/add_open_action.pdf";
public static void main(String[] args) throws Exception {
File file = new File(DEST);
file.getParentFile().mkdirs();
new AddOpenAction().manipulatePdf(DEST);
}
protected void manipulatePdf(String dest) throws Exception {
PdfDocument pdfDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(dest));
PdfPage page1 = pdfDoc.getPage(1);
float page1Height = page1.getPageSize().getHeight();
PdfDestination pdfDestination = PdfExplicitDestination.createXYZ(page1, 0, page1Height, 0.75f);
pdfDoc.getCatalog().setOpenAction(pdfDestination);
pdfDoc.close();
}
}