/*
 * This class is part of the book "iText in Action - 2nd Edition"
 * written by Bruno Lowagie (ISBN: 9781935182610)
 * For more info, go to: http://itextpdf.com/examples/
 * This example only works with the AGPL version of iText.
 */
package part4.chapter15;

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

import com.itextpdf.text.Chunk;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfAction;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfLayer;
import com.itextpdf.text.pdf.PdfWriter;

public class OptionalContentActionExample {

    /** The resulting PDF. */
    public static String RESULT = "results/part4/chapter15/layer_actions.pdf";

    /**
     * Creates a PDF document.
     * @param filename the path to the new PDF document
     * @throws DocumentException 
     * @throws IOException 
     */
    public void createPdf(String filename) throws DocumentException, IOException {
        // step 1
        Document document = new Document();
        // step 2
        PdfWriter writer = PdfWriter.getInstance(
                document, new FileOutputStream(RESULT));
        writer.setPdfVersion(PdfWriter.VERSION_1_5);
        // step 3
        document.open();
        // step 4
        PdfLayer a1 = new PdfLayer("answer 1", writer);
        PdfLayer a2 = new PdfLayer("answer 2", writer);
        PdfLayer a3 = new PdfLayer("answer 3", writer);
        a1.setOn(false);
        a2.setOn(false);
        a3.setOn(false);

        BaseFont bf = BaseFont.createFont();
        PdfContentByte cb = writer.getDirectContent();
        cb.beginText();
        cb.setFontAndSize(bf, 18);
        cb.showTextAligned(Element.ALIGN_LEFT,
            "Q1: Who is the director of the movie 'Paths of Glory'?", 50, 766, 0);
        cb.showTextAligned(Element.ALIGN_LEFT,
            "Q2: Who directed the movie 'Lawrence of Arabia'?", 50, 718, 0);
        cb.showTextAligned(Element.ALIGN_LEFT,
            "Q3: Who is the director of 'House of Flying Daggers'?", 50, 670, 0);
        cb.endText();
        cb.saveState();
        cb.setRGBColorFill(0xFF, 0x00, 0x00);
        cb.beginText();
        cb.beginLayer(a1);
        cb.showTextAligned(Element.ALIGN_LEFT,
                "A1: Stanley Kubrick", 50, 742, 0);
        cb.endLayer();
        cb.beginLayer(a2);
        cb.showTextAligned(Element.ALIGN_LEFT,
                "A2: David Lean", 50, 694, 0);
        cb.endLayer();
        cb.beginLayer(a3);
        cb.showTextAligned(Element.ALIGN_LEFT,
                "A3: Zhang Yimou", 50, 646, 0);
        cb.endLayer();
        cb.endText();
        cb.restoreState();

        ArrayList<Object> stateOn = new ArrayList<Object>();
        stateOn.add("ON");
        stateOn.add(a1);
        stateOn.add(a2);
        stateOn.add(a3);
        PdfAction actionOn = PdfAction.setOCGstate(stateOn, true);
        ArrayList<Object> stateOff = new ArrayList<Object>();
        stateOff.add("OFF");
        stateOff.add(a1);
        stateOff.add(a2);
        stateOff.add(a3);
        PdfAction actionOff = PdfAction.setOCGstate(stateOff, true);
        ArrayList<Object> stateToggle = new ArrayList<Object>();
        stateToggle.add("Toggle");
        stateToggle.add(a1);
        stateToggle.add(a2);
        stateToggle.add(a3);
        PdfAction actionToggle = PdfAction.setOCGstate(stateToggle, true);
        Phrase p = new Phrase("Change the state of the answers:");
        Chunk on = new Chunk(" on ").setAction(actionOn);
        p.add(on);
        Chunk off = new Chunk("/ off ").setAction(actionOff);
        p.add(off);
        Chunk toggle = new Chunk("/ toggle").setAction(actionToggle);
        p.add(toggle);
        document.add(p);
        // step 5
        document.close();
    }

    /**
     * A simple example with optional content.
     * 
     * @param args
     *            no arguments needed here
     * @throws IOException
     * @throws DocumentException
     */
    public static void main(String[] args) throws DocumentException,
            IOException {
        new OptionalContentActionExample().createPdf(RESULT);
    }
}