Layers Demo : Layer « PDF RTF « Java

1. Java
2. PDF RTF
3. Layer

Layers Demo

import java.io.FileOutputStream;

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.PdfLayerMembership;
import com.lowagie.text.pdf.PdfWriter;

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

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

      PdfContentByte cb = writer.getDirectContent();

      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);
    
      cb.beginLayer(l1);
      ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("Text in layer 1"), 50, 600, 0);
      cb.endLayer();
      cb.beginLayer(l2);
      ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("Text in layer 2"), 50, 550, 0);
      cb.endLayer();
      cb.beginLayer(l3);
      ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("Text in layer 3"), 50, 500, 0);
      cb.endLayer();
      
    } catch (Exception e) {
      System.err.println(e.getMessage());
    }
    document.close();
  }
}
           
       

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