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## com.lowagie.text.pdf
Interface PdfPageEvent

All Known Implementing Classes:
  FieldPositioningEvents, IndexEvents, PdfPageEventForwarder, PdfPageEventHelper

    public interface PdfPageEvent

Allows a class to catch several document events.

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

Author:
  Paulo Soares (psoares@consiste.pt)

Method Summary
`void` | `onChapter(PdfWriter writer, Document document, float paragraphPosition, Paragraph title)` Called when a Chapter is written.
`void` | `onChapterEnd(PdfWriter writer, Document document, float paragraphPosition)` 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 paragraphPosition)` Called when the end of a Section is reached.
`void` | `onStartPage(PdfWriter writer, Document document)` Called when a page is initialized.

Method Detail

### onOpenDocument

    void onOpenDocument(PdfWriter writer,
                        Document document)

  Called when the document is opened.

  Parameters:
    `writer` - the `PdfWriter` for this document
    `document` - the document

### onStartPage

    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.

  Parameters:
    `writer` - the `PdfWriter` for this document
    `document` - the document

### onEndPage

    void onEndPage(PdfWriter writer,
                   Document document)

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

  Parameters:
    `writer` - the `PdfWriter` for this document
    `document` - the document

### onCloseDocument

    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.

  Parameters:
    `writer` - the `PdfWriter` for this document
    `document` - the document

### onParagraph

    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.

  Parameters:
    `writer` - the `PdfWriter` for this document
    `document` - the document
    `paragraphPosition` - the position the paragraph will be written to

### onParagraphEnd

    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.

  Parameters:
    `writer` - the `PdfWriter` for this document
    `document` - the document
    `paragraphPosition` - the position of the end of the paragraph

### onChapter

    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.

  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

    void onChapterEnd(PdfWriter writer,
                      Document document,
                      float paragraphPosition)

  Called when the end of a Chapter is reached.

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

  Parameters:
    `writer` - the `PdfWriter` for this document
    `document` - the document
    `paragraphPosition` - the position the chapter will be written to

### onSection

    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.

  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

    void onSectionEnd(PdfWriter writer,
                      Document document,
                      float paragraphPosition)

  Called when the end of a Section is reached.

  `position` will hold the height of the section end.

  Parameters:
    `writer` - the `PdfWriter` for this document
    `document` - the document
    `paragraphPosition` - the position the section will be written to

### onGenericTag

    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.

  Parameters:
    `writer` - the `PdfWriter` for this document
    `document` - the document
    `rect` - the `Rectangle` containing the `Chunk`
    `text` - the text of the tag

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