cadev wrote:
>
> I am using page events to add a header to a pdf document. The header
> contains a PdfPTable. I would like to add a String containing a page
> number to the last row of the PdfPTable. However, when I initialize the
> PdfPTable (in setPageHeader), the page number does not exist yet -- it
> only exists in the "onEndPage" method. How can I put the page number in
> the PdfPTable?
>
For anyone who is interested, here was my eventual solution. I invite
anyone to critique my method and come up with a similar solution that is not
so round-about.
public class ComplexHeader extends PdfPageEventHelper {
private PdfPTable pdfHeaderTable;
private float pdfHeaderPadding = 0;
private float headerDataHeight = 0;
private float hNumberedTableHeight = 0;
private Phrase headerNumberedPhrase = null;
public ComplexHeader() {
; //Do nothing, just initialize the object
}
public void setPageHeader (PdfPTable iHeaderTable, String numberedString,
Font font, Document document) {
pdfHeaderTable = new PdfPTable(iHeaderTable);
pdfHeaderTable.setTotalWidth(document.right() - document.left());
headerDataHeight = pdfHeaderTable.getTotalHeight();
if (font == null)
font = new Font(Font.TIMES_ROMAN, 10, Font.BOLD);
headerNumberedPhrase = new Phrase(numberedString, font);
if (!headerNumberedPhrase.isEmpty()) {
PdfPTable pdfNumberedTable = new PdfPTable(1);
pdfNumberedTable.getDefaultCell().setBorder(Rectangle.NO_BORDER);
pdfNumberedTable.getDefaultCell().setUseAscender(true);
pdfNumberedTable.getDefaultCell().setUseBorderPadding(true);
Phrase headerPhraseWithNumber = new
Phrase(headerNumberedPhrase);
headerPhraseWithNumber.add(" 999"); //This is just to figure
out table
size, and there will probably never be a page number >999
PdfPCell headerCell = new
PdfPCell(pdfNumberedTable.getDefaultCell());
headerCell.setPhrase(headerPhraseWithNumber);
headerCell.setHorizontalAlignment(Element.ALIGN_CENTER);
pdfNumberedTable.addCell(headerCell);
pdfNumberedTable.setTotalWidth(document.right() -
document.left());
hNumberedTableHeight = pdfNumberedTable.getTotalHeight();
}
document.setMargins(document.leftMargin(), document.rightMargin(),
(document.topMargin() + headerDataHeight + hNumberedTableHeight +
pdfHeaderPadding), document.bottomMargin());
}
public void onEndPage(PdfWriter writer, Document document) {
PdfContentByte cb = writer.getDirectContent();
if (pdfHeaderTable != null) {
pdfHeaderTable.writeSelectedRows(0, -1,
document.left(), document.top() +
hNumberedTableHeight + headerDataHeight + pdfHeaderPadding, cb);
if (!headerNumberedPhrase.isEmpty()) {
PdfPTable pdfNumberedTable = new PdfPTable(1);
pdfNumberedTable.getDefaultCell().setBorder(Rectangle.NO_BORDER);
pdfNumberedTable.getDefaultCell().setUseAscender(true);
pdfNumberedTable.getDefaultCell().setUseBorderPadding(true);
Phrase headerPhraseWithNumber = new
Phrase(headerNumberedPhrase);
headerPhraseWithNumber.add(" " +
writer.getPageNumber());
PdfPCell headerCell = new
PdfPCell(pdfNumberedTable.getDefaultCell());
headerCell.setPhrase(headerPhraseWithNumber);
headerCell.setHorizontalAlignment(Element.ALIGN_CENTER);
pdfNumberedTable.addCell(headerCell);
pdfNumberedTable.setTotalWidth(document.right()
- document.left());
pdfNumberedTable.writeSelectedRows(0, -1,
document.left(),
document.top() + hNumberedTableHeight + pdfHeaderPadding, cb);
}
}
}
}
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