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?
(code sample below -- if I am not posting the code properly, please let me
know how post code samples)
public class ComplexHeader extends PdfPageEventHelper {
private PdfPTable pdfHeaderTable;
private float pdfHeaderPadding = 10;
private float headerDataHeight;
public ComplexHeader() {
; //Do nothing, just initialize the object
}
// Called from the program creating the document before any content is
added to the document;
// Is there a way to put the page number into iHeaderTable before
passing it? Otherwise, can I pass in a third parameter
// (String numberedPhrase) that can be appended to the header in
onEndPage? If using numberedPhrase, how can I calculate the page margins
// here to adjust them properly?
public void setPageHeader (PdfPTable iHeaderTable, Document document)
{
pdfHeaderTable = new PdfPTable(iHeaderTable);
pdfHeaderTable.setTotalWidth(document.right() - document.left());
headerDataHeight = pdfHeaderTable.getTotalHeight();
document.setMargins(document.leftMargin(), document.rightMargin(),
(document.topMargin() + headerDataHeight + pdfHeaderPadding),
document.bottomMargin());
}
public void onEndPage(PdfWriter writer, Document document) {
PdfContentByte cb = writer.getDirectContent();
pdfHeaderTable.writeSelectedRows(0, -1, document.left(),
document.top() + headerDataHeight + pdfHeaderPadding, cb);
}
}
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