Nested Layers : Layer « PDF « Java Tutorial

1. Java Tutorial
2. PDF
3. Layer

import java.io.FileOutputStream;
import java.util.ArrayList;

import com.lowagie.text.Document;
import com.lowagie.text.Element;
import com.lowagie.text.Phrase;
import com.lowagie.text.pdf.ColumnText;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfLayer;
import com.lowagie.text.pdf.PdfWriter;

public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document();
    PdfWriter writer = PdfWriter
        .getInstance(document, new FileOutputStream("2.pdf"));
    writer.setPdfVersion(PdfWriter.VERSION_1_5);

    document.open();

    PdfContentByte cb = writer.getDirectContent();

    PdfLayer nested = new PdfLayer("Nested Layers", writer);
    PdfLayer nested_1 = new PdfLayer("Nested Layer 1", writer);
    PdfLayer nested_2 = new PdfLayer("Nested Layer 2", writer);
    nested.addChild(nested_1);
    nested.addChild(nested_2);
    cb.beginLayer(nested);
    ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("nested layers"), 50, 775, 0);
    cb.endLayer();
    cb.beginLayer(nested_1);
    ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("nested layer 1"), 100, 800, 0);
    cb.endLayer();
    cb.beginLayer(nested_2);
    ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("nested layer 2"), 100, 750, 0);
    cb.endLayer();
    
    document.close();
  }
}