/*
 * 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.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.pdf.ColumnText;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfLayer;
import com.itextpdf.text.pdf.PdfWriter;

public class OptionalContentExample {

    /** The resulting PDF. */
    public static String RESULT = "results/part4/chapter15/layer_structure.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
        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);
        writer.lockLayer(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();

        PdfLayer group = PdfLayer.createTitle("Grouped layers", writer);
        PdfLayer layer1 = new PdfLayer("Group: layer 1", writer);
        PdfLayer layer2 = new PdfLayer("Group: layer 2", writer);
        group.addChild(layer1);
        group.addChild(layer2);
        cb.beginLayer(layer1);
        ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase(
                "layer 1 in the group"), 50, 700, 0);
        cb.endLayer();
        cb.beginLayer(layer2);
        ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase(
                "layer 2 in the group"), 50, 675, 0);
        cb.endLayer();

        PdfLayer radiogroup = PdfLayer.createTitle("Radio group", writer);
        PdfLayer radio1 = new PdfLayer("Radiogroup: layer 1", writer);
        radio1.setOn(true);
        PdfLayer radio2 = new PdfLayer("Radiogroup: layer 2", writer);
        radio2.setOn(false);
        PdfLayer radio3 = new PdfLayer("Radiogroup: layer 3", writer);
        radio3.setOn(false);
        radiogroup.addChild(radio1);
        radiogroup.addChild(radio2);
        radiogroup.addChild(radio3);
        ArrayList<PdfLayer> options = new ArrayList<PdfLayer>();
        options.add(radio1);
        options.add(radio2);
        options.add(radio3);
        writer.addOCGRadioGroup(options);
        cb.beginLayer(radio1);
        ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase(
                "option 1"), 50, 600, 0);
        cb.endLayer();
        cb.beginLayer(radio2);
        ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase(
                "option 2"), 50, 575, 0);
        cb.endLayer();
        cb.beginLayer(radio3);
        ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase(
                "option 3"), 50, 550, 0);
        cb.endLayer();

        PdfLayer not_printed = new PdfLayer("not printed", writer);
        not_printed.setOnPanel(false);
        not_printed.setPrint("Print", false);
        cb.beginLayer(not_printed);
        ColumnText.showTextAligned(cb, Element.ALIGN_CENTER, new Phrase(
                "PRINT THIS PAGE"), 300, 700, 90);
        cb.endLayer();

        PdfLayer zoom = new PdfLayer("Zoom 0.75-1.25", writer);
        zoom.setOnPanel(false);
        zoom.setZoom(0.75f, 1.25f);
        cb.beginLayer(zoom);
        ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase(
                "Only visible if the zoomfactor is between 75 and 125%"), 30,
                530, 90);
        cb.endLayer();

        // 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 OptionalContentExample().createPdf(RESULT);
    }
}