Sumner, Jeff wrote:
> It looks like headers should be generated in the onEndPage method
> instead of onStartPage.
That's correct.
> First, as I generate body text of the document, I’d need to set the top
> margin based on the page number. If I’m on page 1, I need 3.5 inches
> for the header. Otherwise I need only 2 inches. Is it possible to call
> Document.setMargins() in the onStartPage method to conditionally change
> the top margin based on the current page?
I wouldn't do that. The Document object you receive in onStartPage
is a PdfDocument NOT the Document object you're adding content to.
> Second, and this is the one that really concerns me, is it possible to
> use the PdfPTable objects to generate my header data and make calls
> document.add(table) to build the header?
No, for the same reason as above.
> Or do I have to use the
> PdfContentByte class and generate everything with absolute positions?
> I’m afraid that the answer is that I have to use PdfContentByte, but
> I’m hoping that’s not the case since I already have everything working
> with the PdfPTables.
This seems like a perfect job for ColumnText.
That way you can keep on working with PdfPTable.
You can avoid working with PdfContentByte directly.
In PseudoCode:
Document.open();
ColumnText ct1 = new ColumnText(writer.getDirectContent());
ColumnText ct2 = new ColumnText(writer.getDirectContent());
ct1.setSimpleColumn(coordinates);
ct2.setSimpleColumn(coordinates);
while (there's content) {
ct1.add(header_table);
ct1.go();
ct2.add(content);
ct2.setY(ct1.getY());
ct2.go();
document.newPage();
}
(This is NOT a working example, just something meant to inspire you.)
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