On 17/08/2012 12:19, cmo wrote:
> Why is it, that a PdfCopy/SmartCopy doe's not worry about paper sizes and
> rotations when adding
> an imported page via copy.addPage(page) and
You mean that PdfCopy/SmartCopy preserve the page boundaries and
rotation (so they do worry about paper size and rotation).
> a writer does worry via
> writer.addtemplate(page).
PdfWriter doesn't worry about the rotation (it doesn't look at the
rotation key in the MediaBox). As for the page size, it only looks at
the MediaBox and not at the other page boundaries (in your case: it
doesn't worry about the CropBox).
> Why im asking this?
Good question. We want to avoid that people use PdfWriter /
PdfImportedPage for the purpose of concatenating PDFs, and that's why
PdfWriter worries less about page boundaries and rotation than
PdfStamper, PdfCopy and PdfSmartCopy.
> My problem is, that i want to merge pages
Merge: PdfCopy / PdfSmartCopy
> but also scale them down
Why? PDF files don't have a resolution. In Adobe Reader, you can zoom
in, zoom out, and you have different print options. I've never
understood the arguments people forward when they say "we want to scale
down a PDF." Maybe you'll be the first one providing me a good argument,
so I'm curious to read on.
> and have
> them exceute a custom
> PdfPageEventHelper so that I get the same page, a little smaller with header
> and footer.
Aha, what you actually want to do, is to change the page boundaries so
that you can add extra content. Are you sure that implies scaling down
the document? Because it won't be sufficient to scale down the content,
you'll also have to scale down all the interactive features (otherwise
all the links and annotations will end up on the wrong place; actually
when using PdfWriter, all interactivity will get lost completely).
> It seems Copy/Smart does not trigger the OnEndPageEvent()
please start by downloading chapter 6 of the book "iText in Action -
Second Edition":
http://www.manning.com/lowagie2/samplechapter6.pdfNow read p188 (the 36th page in the extract of the book):
ADDING CONTENT WITH PDFCOPY
In previous sections, I explained that PdfImportedPage is a read-only
subclass of PdfTemplate. You can’t add any content to an imported page.
This wasn’t a big deal when using imported pages with PdfWriter and
PdfStamper because we could easily add content over or under the
imported page. When using PdfCopy, it would be interesting if we could
somehow add extra content too.
What this paragraph says is basically that PdfCopy and its subclass
PdfSmartCopy are for read-only use only, which explains why the
following line has no effect:
copy.setPageEvent(new WatermarkCreator("DRAFT"));
I'll make sure an Exception is thrown when using this method in the next
release of iText.
> and can't scale
> the imported page.
But you don't want to scale down the imported page: you just want to
create some extra space for a header and a footer! Typically, you'll do
that by changing the rectangles defining the page boundaries at the
level of PdfReader. This is an example that does the opposite:
http://1t3xt.be/?104It 'crops' pages (makes them smaller). You need to update the example to
make pages bigger.
> So I have to use the Writer and addtemplate(page, matrix) to get the desired
> result.
Ouch, yes, that's to be used only in the case the 'good solution'
doesn't meet your requirements. For instance: because you discover that
your document had invisible content that was cropped and that is visible
after removing the cropping.
> There lies my problem - now it seems I have to worry about paper sizes and
> rotation.
Yes, you do. See page 167 of the chapter you've just downloaded (the
last code snippet of section 6.2.1).
You have to ask the page for its rotation, and in your case, you need
this to define the rotation of the new page you're creating.
> Rotations/scaling I can handle with a matrix, but the resulting pages does
> not have the same size as the imported page.
The MediaBox is the same, but did you check the other page boundaries?
Especially the CropBox deserves your attention.
> How do I set them to match the source page size. When using
> document.setPageSize(importedPage.getSize());
> document.newPage();
That's not sufficient is it? You're copying the MediaBox (getSize() /
setSize()), but not the other page boundaries.
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