com.lowagie.text.pdf

Class PdfPageEventHelper

java.lang.Object

com.lowagie.text.pdf.PdfPageEventHelper

All Implemented Interfaces:

PdfPageEvent

Direct Known Subclasses:

FieldPositioningEvents, IndexEvents

public class PdfPageEventHelper
extends Object
implements PdfPageEvent

Helps the use of PdfPageEvent by implementing all the interface methods. A class can extend PdfPageEventHelper and only implement the needed methods.

Note: do not use Document.add() inside a page event.

Author:

Paulo Soares (psoares@consiste.pt)

Constructor Summary

Constructors

Constructor and Description
PdfPageEventHelper()

Method Summary

Modifier and Type	Method and Description
void	onChapter(PdfWriter writer, Document document, float paragraphPosition, Paragraph title) Called when a Chapter is written.
void	onChapterEnd(PdfWriter writer, Document document, float position) Called when the end of a Chapter is reached.
void	onCloseDocument(PdfWriter writer, Document document) Called when the document is closed.
void	onEndPage(PdfWriter writer, Document document) Called when a page is finished, just before being written to the document.
void	onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) Called when a Chunk with a generic tag is written.
void	onOpenDocument(PdfWriter writer, Document document) Called when the document is opened.
void	onParagraph(PdfWriter writer, Document document, float paragraphPosition) Called when a Paragraph is written.
void	onParagraphEnd(PdfWriter writer, Document document, float paragraphPosition) Called when a Paragraph is written.
void	onSection(PdfWriter writer, Document document, float paragraphPosition, int depth, Paragraph title) Called when a Section is written.
void	onSectionEnd(PdfWriter writer, Document document, float position) Called when the end of a Section is reached.
void	onStartPage(PdfWriter writer, Document document) Called when a page is initialized.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PdfPageEventHelper

public PdfPageEventHelper()

Method Detail

onOpenDocument

public void onOpenDocument(PdfWriter writer,
                           Document document)

Called when the document is opened.

Specified by:

onOpenDocument in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

onStartPage

public void onStartPage(PdfWriter writer,
                        Document document)

Called when a page is initialized.

Note that if even if a page is not written this method is still called. It is preferable to use onEndPage to avoid infinite loops.

Specified by:

onStartPage in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

onEndPage

public void onEndPage(PdfWriter writer,
                      Document document)

Called when a page is finished, just before being written to the document.

Specified by:

onEndPage in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

onCloseDocument

public void onCloseDocument(PdfWriter writer,
                            Document document)

Called when the document is closed.

Note that this method is called with the page number equal to the last page plus one.

Specified by:

onCloseDocument in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

onParagraph

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

Called when a Paragraph is written.

paragraphPosition will hold the height at which the paragraph will be written to. This is useful to insert bookmarks with more control.

Specified by:

onParagraph in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

paragraphPosition - the position the paragraph will be written to

onParagraphEnd

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

Called when a Paragraph is written.

paragraphPosition will hold the height of the end of the paragraph.

Specified by:

onParagraphEnd in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

paragraphPosition - the position of the end of the paragraph

onChapter

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

Called when a Chapter is written.

position will hold the height at which the chapter will be written to.

Specified by:

onChapter in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

paragraphPosition - the position the chapter will be written to

title - the title of the Chapter

onChapterEnd

public void onChapterEnd(PdfWriter writer,
                         Document document,
                         float position)

Called when the end of a Chapter is reached.

position will hold the height of the end of the chapter.

Specified by:

onChapterEnd in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

position - the position of the end of the chapter.

onSection

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

Called when a Section is written.

position will hold the height at which the section will be written to.

Specified by:

onSection in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

paragraphPosition - the position the section will be written to

depth - the number depth of the Section

title - the title of the section

onSectionEnd

public void onSectionEnd(PdfWriter writer,
                         Document document,
                         float position)

Called when the end of a Section is reached.

position will hold the height of the section end.

Specified by:

onSectionEnd in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

position - the position of the end of the section

onGenericTag

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

Called when a Chunk with a generic tag is written.

It is useful to pinpoint the Chunk location to generate bookmarks, for example.

Specified by:

onGenericTag in interface PdfPageEvent

Parameters:

writer - the PdfWriter for this document

document - the document

rect - the Rectangle containing the Chunk

text - the text of the tag