Skip to main content
Skip table of contents

Changing the zoom factor in a link destination

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

JAVA 
/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2023 Apryse Group NV
    Authors: Apryse Software.

    For more information, please contact iText Software at this address:
    sales@itextpdf.com
 */
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/main/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();
    }
}

C#

C# 
using System;
using System.IO;
using iText.Kernel.Pdf;

namespace iText.Samples.Sandbox.Annotations
{
    public class ChangeZoomXYZDestination
    {
        public static readonly String DEST = "results/sandbox/annotations/change_zoom_xyz_destination.pdf";

        public static readonly String SRC = "../../../resources/pdfs/xyz_destination.pdf";

        public static void Main(String[] args)
        {
            FileInfo file = new FileInfo(DEST);
            file.Directory.Create();

            new ChangeZoomXYZDestination().ManipulatePdf(DEST);
        }

        protected void ManipulatePdf(String dest)
        {
            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();
        }
    }
}


xyzdestination

JAVA

JAVA 
/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2023 Apryse Group NV
    Authors: Apryse Software.

    For more information, please contact iText Software at this address:
    sales@itextpdf.com
 */
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();
    }
}

C#

C# 
using System;
using System.IO;
using iText.Kernel.Pdf;
using iText.Kernel.Pdf.Navigation;
using iText.Layout;
using iText.Layout.Element;

namespace iText.Samples.Sandbox.Annotations
{
    public class XYZDestination
    {
        public static readonly String DEST = "results/sandbox/annotations/xyz_destination.pdf";

        public static void Main(String[] args)
        {
            FileInfo file = new FileInfo(DEST);
            file.Directory.Create();

            new XYZDestination().ManipulatePdf(DEST);
        }

        protected void ManipulatePdf(String dest)
        {
            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();
        }
    }
}


addopenaction

JAVA

JAVA 
/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2023 Apryse Group NV
    Authors: Apryse Software.

    For more information, please contact iText Software at this address:
    sales@itextpdf.com
 */
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/main/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();
    }
}

C#

C# 
using System;
using System.IO;
using iText.Kernel.Pdf;
using iText.Kernel.Pdf.Navigation;

namespace iText.Samples.Sandbox.Stamper 
{
    public class AddOpenAction {
        public static readonly String SRC = "../../../resources/pdfs/hello.pdf";
        public static readonly String DEST = "results/sandbox/stamper/add_open_action.pdf";

        public static void Main(String[] args) 
        {
            FileInfo file = new FileInfo(DEST);
            file.Directory.Create();
            
            new AddOpenAction().ManipulatePdf(DEST);
        }

        protected internal virtual void ManipulatePdf(String dest) 
        {
            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();
        }
    }
}
JavaScript errors detected

Please note, these errors can depend on your browser setup.

If this problem persists, please contact our support.

Contact Support Close