de.tr1.cooperator.manager.web.CreateSubscriberListActionHelper.java Source code

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Here is the source code for de.tr1.cooperator.manager.web.CreateSubscriberListActionHelper.java

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/*
File:      CreateSubscriberListActionHelper.java
Created:   05-06-17@23:55
Task:      EventHandlers for PageEvents during creation of a pdf-file
Author:      Peter Matjeschk
    
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
    
This program 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.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

package de.tr1.cooperator.manager.web;

import java.text.*;
import com.lowagie.text.*;
import com.lowagie.text.pdf.*;

import java.io.FileOutputStream;
import java.io.IOException;

/**
 * EventHandlers for PageEvents during creation of a pdf-file
 *
 * @author Peter Matjeschk
 * @version 05-06-17@23:55
 */
public class CreateSubscriberListActionHelper implements PdfPageEvent {
    /** left text in the site-header */
    private String sHeaderLeft;

    /** right text in the site-header */
    private String sHeaderRight;

    /** The headertable. */
    private PdfPTable tHeader;
    /** This is the contentbyte object of the writer */
    private PdfContentByte cb;
    /** we will put the final number of pages in a template */
    private PdfTemplate template;
    /** this is the BaseFont we are going to use for the header / footer */
    private BaseFont bf = null;

    /**
     * @param sHeaderLeft Text on the left site-header
     * @param sHeaderRight Text on the right site-header
     */
    public CreateSubscriberListActionHelper(String sHeaderLeft, String sHeaderRight) {
        this.sHeaderLeft = sHeaderLeft;
        this.sHeaderRight = sHeaderRight;
    }

    /**
     * The first thing to do when the document is opened, is to define the BaseFont,
     * get the Direct Content object and create the template that will hold the final
     * number of pages.
     * @see com.lowagie.text.pdf.PdfPageEventHelper#onOpenDocument(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
     */
    public void onOpenDocument(PdfWriter writer, Document document) {
        try {
            bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
            cb = writer.getDirectContent();

            // initialization of the header table
            tHeader = new PdfPTable(2);
            Phrase p = new Phrase();

            tHeader.getDefaultCell().setBorder(Rectangle.NO_BORDER);

            tHeader.addCell(sHeaderLeft);

            tHeader.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);
            tHeader.addCell(sHeaderRight);

            template = cb.createTemplate(50, 50);
        } catch (DocumentException de) {
        } catch (IOException ioe) {
        }
    }

    /**
     * After the content of the page is written, we put page X / Y
     * @see com.lowagie.text.pdf.PdfPageEventHelper#onEndPage(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
     */
    public void onEndPage(PdfWriter writer, Document document) {
        int pageN = writer.getPageNumber();
        String text = "" + pageN;
        String separator = " / ";
        float text_len = bf.getWidthPoint(text, 8);
        float sep_len = bf.getWidthPoint(separator, 8);
        cb.beginText();
        cb.setFontAndSize(bf, 8);
        float absMiddle = (document.right() - document.left()) / 2 + document.left();
        cb.setTextMatrix(absMiddle - text_len - (sep_len / 2), 30);
        cb.showText(text);
        cb.setTextMatrix(absMiddle - (sep_len / 2), 30);
        cb.showText(separator);
        cb.endText();
        cb.addTemplate(template, absMiddle + (sep_len / 2), 30);

        // write the headertable
        tHeader.setTotalWidth(document.right() - document.left());
        tHeader.writeSelectedRows(0, -1, document.left(), document.getPageSize().height() - 20, cb);
    }

    /**
     * Just before the document is closed, we add the final number of pages to
     * the template.
     * @see com.lowagie.text.pdf.PdfPageEventHelper#onCloseDocument(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
     */
    public void onCloseDocument(PdfWriter writer, Document document) {
        template.beginText();
        template.setFontAndSize(bf, 8);
        template.showText(String.valueOf(writer.getPageNumber() - 1));
        template.endText();
    }

    //These are just empty methods for the interface..
    public void onStartPage(PdfWriter writer, Document document) {
    }

    public void onParagraph(PdfWriter writer, Document document, float paragraphPosition) {
    }

    public void onParagraphEnd(PdfWriter writer, Document document, float paragraphPosition) {
    }

    public void onChapter(PdfWriter writer, Document document, float paragraphPosition, Paragraph title) {
    }

    public void onChapterEnd(PdfWriter writer, Document document, float paragraphPosition) {
    }

    public void onSection(PdfWriter writer, Document document, float paragraphPosition, int depth,
            Paragraph title) {
    }

    public void onSectionEnd(PdfWriter writer, Document document, float paragraphPosition) {
    }

    public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
    }
}