Source Code : Layers Group Demo

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Layers Group Demo

import java.io.FileOutputStream;

import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfArray;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfLayer;
import com.lowagie.text.pdf.PdfLayerMembership;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfOCProperties;
import com.lowagie.text.pdf.PdfObject;
import com.lowagie.text.pdf.PdfString;
import com.lowagie.text.pdf.PdfWriter;

public class LayersGroupPDF {
  public static void main(String[] args) {
    Document document = new Document();
    try {
      PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("LayersGroupPDF.pdf"));
      writer.setPdfVersion(PdfWriter.VERSION_1_5);

      writer.setViewerPreferences(PdfWriter.PageModeUseOC);
      document.open();

      PdfLayer l1 = new PdfLayer("Layer 1", writer);
      PdfLayer l2 = new PdfLayer("Layer 2", writer);
      PdfLayer l3 = new PdfLayer("Layer 3", writer);
      PdfLayerMembership m1 = new PdfLayerMembership(writer);
      m1.addMember(l1);
      m1.addMember(l2);
      m1.addMember(l3);
    
      PdfOCProperties p = writer.getOCProperties();
      PdfArray order = new PdfArray();
      order.add(l1.getRef());
      PdfArray group = new PdfArray();
      group.add(new PdfString("A group of two", PdfObject.TEXT_UNICODE));
      group.add(l2.getRef());
      group.add(l3.getRef());
      order.add(group);
      PdfDictionary d = new PdfDictionary();
      d.put(PdfName.ORDER, order);
      p.put(PdfName.D, d);
    } catch (Exception e) {
      System.err.println(e.getMessage());
    }
    document.close();
  }
}
           
       

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