Java tutorial
/* * $Id: PdfPageEventHelper.java 3373 2008-05-12 16:21:24Z xlv $ * * Copyright 2001, 2002 Paulo Soares * * The contents of this file are subject to the Mozilla Public License Version 1.1 * (the "License"); you may not use this file except in compliance with the License. * You may obtain a copy of the License at http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the License. * * The Original Code is 'iText, a free JAVA-PDF library'. * * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie. * All Rights Reserved. * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved. * * Contributor(s): all the names of the contributors are added in the source code * where applicable. * * Alternatively, the contents of this file may be used under the terms of the * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the * provisions of LGPL are applicable instead of those above. If you wish to * allow use of your version of this file only under the terms of the LGPL * License and not to allow others to use your version of this file under * the MPL, indicate your decision by deleting the provisions above and * replace them with the notice and other provisions required by the LGPL. * If you do not delete the provisions above, a recipient may use your version * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE. * * This library is free software; you can redistribute it and/or modify it * under the terms of the MPL as stated above or under the terms of the GNU * Library General Public License as published by the Free Software Foundation; * either version 2 of the License, or any later version. * * This library 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 Library general Public License for more * details. * * If you didn't download this code from the following link, you should check if * you aren't using an obsolete version: * http://www.lowagie.com/iText/ */ package com.lowagie.text.pdf; import com.lowagie.text.Document; import com.lowagie.text.Paragraph; import com.lowagie.text.Rectangle; /** * Helps the use of <CODE>PdfPageEvent</CODE> by implementing all the interface methods. * A class can extend <CODE>PdfPageEventHelper</CODE> and only implement the * needed methods. *<p> * Note: do not use Document.add() inside a page event. * @author Paulo Soares (psoares@consiste.pt) */ public class PdfPageEventHelper implements PdfPageEvent { /** * Called when the document is opened. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document */ public void onOpenDocument(PdfWriter writer, Document document) { } /** * Called when a page is initialized. * <P> * Note that if even if a page is not written this method is still * called. It is preferable to use <CODE>onEndPage</CODE> to avoid * infinite loops. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document */ public void onStartPage(PdfWriter writer, Document document) { } /** * Called when a page is finished, just before being written to the document. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document */ public void onEndPage(PdfWriter writer, Document document) { } /** * Called when the document is closed. * <P> * Note that this method is called with the page number equal * to the last page plus one. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document */ public void onCloseDocument(PdfWriter writer, Document document) { } /** * Called when a Paragraph is written. * <P> * <CODE>paragraphPosition</CODE> will hold the height at which the * paragraph will be written to. This is useful to insert bookmarks with * more control. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document * @param paragraphPosition the position the paragraph will be written to */ public void onParagraph(PdfWriter writer, Document document, float paragraphPosition) { } /** * Called when a Paragraph is written. * <P> * <CODE>paragraphPosition</CODE> will hold the height of the end of the paragraph. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document * @param paragraphPosition the position of the end of the paragraph */ public void onParagraphEnd(PdfWriter writer, Document document, float paragraphPosition) { } /** * Called when a Chapter is written. * <P> * <CODE>position</CODE> will hold the height at which the * chapter will be written to. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document * @param paragraphPosition the position the chapter will be written to * @param title the title of the Chapter */ public void onChapter(PdfWriter writer, Document document, float paragraphPosition, Paragraph title) { } /** * Called when the end of a Chapter is reached. * <P> * <CODE>position</CODE> will hold the height of the end of the chapter. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document * @param position the position of the end of the chapter. */ public void onChapterEnd(PdfWriter writer, Document document, float position) { } /** * Called when a Section is written. * <P> * <CODE>position</CODE> will hold the height at which the * section will be written to. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document * @param paragraphPosition the position the section will be written to * @param depth the number depth of the Section * @param title the title of the section */ public void onSection(PdfWriter writer, Document document, float paragraphPosition, int depth, Paragraph title) { } /** * Called when the end of a Section is reached. * <P> * <CODE>position</CODE> will hold the height of the section end. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document * @param position the position of the end of the section */ public void onSectionEnd(PdfWriter writer, Document document, float position) { } /** * Called when a <CODE>Chunk</CODE> with a generic tag is written. * <P> * It is useful to pinpoint the <CODE>Chunk</CODE> location to generate * bookmarks, for example. * * @param writer the <CODE>PdfWriter</CODE> for this document * @param document the document * @param rect the <CODE>Rectangle</CODE> containing the <CODE>Chunk</CODE> * @param text the text of the tag */ public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) { } }