/*
 * $Id$
 *
 * This code is part of the 'iText Tutorial'.
 * You can find the complete tutorial at the following address:
 * http://itextdocs.lowagie.com/tutorial/
 *
 * This code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * itext-questions@lists.sourceforge.net
 */

package com.lowagie.examples.objects.bookmarks;

import java.awt.Color;
import java.io.FileOutputStream;
import java.io.IOException;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.Font;
import com.lowagie.text.Phrase;
import com.lowagie.text.pdf.ColumnText;
import com.lowagie.text.pdf.PdfArray;
import com.lowagie.text.pdf.PdfContentByte;
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;

/**
 * Demonstrates how layers work.
 * 
 * @author blowagie
 */

public class Layers {

	/**
	 * Demonstrates some Layer functionality.
	 * 
	 * @param args
	 *            no arguments needed here
	 */
	public static void main(String[] args) {

		System.out.println("layers");

		// step 1: creation of a document-object
		Document document = new Document();
		try {
			// step 2:
			PdfWriter writer = PdfWriter.getInstance(document,
					new FileOutputStream("Layers.pdf"));
			writer.setPdfVersion(PdfWriter.VERSION_1_5);
			// step 3:
			writer.setViewerPreferences(PdfWriter.PageModeUseOC);
			document.open();
			// step 4:
			PdfContentByte cb = writer.getDirectContent();
			Phrase explanation = new Phrase("Layer grouping", new Font(
					Font.HELVETICA, 20, Font.BOLD, Color.red));
			ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, explanation, 50,
					650, 0);
			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(l2);
			m1.addMember(l3);
			Phrase p1 = new Phrase("Text in layer 1");
			Phrase p2 = new Phrase("Text in layer 2 or layer 3");
			Phrase p3 = new Phrase("Text in layer 3");
			cb.beginLayer(l1);
			ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, p1, 50, 600, 0);
			cb.endLayer();
			cb.beginLayer(m1);
			ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, p2, 50, 550, 0);
			cb.endLayer();
			cb.beginLayer(l3);
			ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, p3, 50, 500, 0);
			cb.endLayer();
			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 (DocumentException de) {
			System.err.println(de.getMessage());
		} catch (IOException ioe) {
			System.err.println(ioe.getMessage());
		}

		// step 5: we close the document
		document.close();
	}
}