> -----Original Message-----
> From: Tom Cadwell [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, February 05, 2002 3:43
> To: [EMAIL PROTECTED]
> Subject: [iText-questions] Using Complex Headers with Page Events
> Question
>
> Hi,
>
> Im using a custom "header" with PdfPageEvent stuff.
>
> Basically, what I'm doing is accepting a fairly complex PdfPTable header,
> which has an image and several cells of text. My code is generalized to
> take an "Element" class header, and insert it into the document as a
> header
> using events.
>
> Unfortunately, the way I've done it is to use onStartPage to add the
> PdfPTable every time I get an onPageEvent. This doesnt work so well,
> because although it works great for all pages (mostly), it doesnt work
> great
> for the last page. It always seems to add an additional page somehow, and
> Im not sure how to prevent this -- i.e. a blank additional page after
> whatever else is there which only contains the header and footer (footer
> is
> like the chapter 1201 page n of m example, header is unique)
>
> Ive tried several work arounds to no avail:
> - Using onEndPage (which works for all pages but the first in the case of
> my
> document, but not the first and last -- the last being the big
> difficulty).
>
Why doesn't it work?
> It does
> get rid of the extra page, however.
> - Inserting a small line of invisible text after the table, so as to avoid
> potential weirdness with PdfPTable (no avail)
>
What weirdness?
> I cant seem to see how to insert the table like the chapter 1201 example,
> which inserts straight text and seems to allocate space for it somehow.
> My
> insertion method is just Document.add(Element e), but Im beginning to
> suspect thats a no-go. Any other way i could add an element without
> overwriting other things space?
>
> Following from there, what I dont understand is why onPageEvent is getting
> triggered to make an additional page after the document has ended. You
>
See
http://www.mail-archive.com/itext-questions@lists.sourceforge.net/msg00081.h
tml.
> mention it is "As a page is being created"... Heres what I saw in my
> logging of pageEvents in a docuemnt that has data from page 2-7 but has
> basically a header and empty page for page 8 (no page 9 obviously)
> DEBUG (report.HeaderEvent) [] trigger onStartPage for 1
> DEBUG (report.HeaderEvent) [] trigger onStartPage for 2
> DEBUG (report.HeaderEvent) [] triggering on end page on pagenumber 2
> DEBUG (report.HeaderEvent) [] trigger onStartPage for 3
> DEBUG (report.HeaderEvent) [] triggering on end page on pagenumber 3
> DEBUG (report.HeaderEvent) [] trigger onStartPage for 4
> DEBUG (report.HeaderEvent) [] triggering on end page on pagenumber 4
> DEBUG (report.HeaderEvent) [] trigger onStartPage for 5
> DEBUG (report.HeaderEvent) [] triggering on end page on pagenumber 5
> DEBUG (report.HeaderEvent) [] trigger onStartPage for 6
> DEBUG (report.HeaderEvent) [] triggering on end page on pagenumber 6
> DEBUG (report.HeaderEvent) [] trigger onStartPage for 7
> DEBUG (report.HeaderEvent) [] triggering on end page on pagenumber 7
> DEBUG (report.HeaderEvent) [] trigger onStartPage for 8
> DEBUG (report.HeaderEvent) [] triggering on end page on pagenumber 8
> DEBUG (report.HeaderEvent) [] trigger onStartPage for 9
> DEBUG (report.HeaderEvent) [] called onCloseDocument
>
> I suspect that my document.add call is triggering another onStartPage
> event
> for the #8, but if that was the case, woudlnt I be getting a double header
> at the end or an endless loop (which I'm not). It doesnt make a lot of
> sense for that to be triggered either, since my header isnt pushing text
> page page number 7...
>
> Any ideas? Is this a bug, or am I just doing something really dumb? Any
> help is greatly appreciated!
> Tom
>
You don't have to rely on page events alone, with an extra help it
works. Use a flag to allow OnStartPage to work normally and reset that flag
after entering the last page to prevent the extra call.
See Formtest.java in the examples at
http://www.geocities.com/itextpdf where this technique is used with other
event method.
Best Regards,
Paulo Soares
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