From: Max Williams <toastkid.williams@...>
Date: 2008-09-08T17:42:33+09:00
Subject: PDF::Writer - measure size of a section before rendering it?

I'm using the PDF::Writer plugin and have got everything that i wanted
working except for one thing:  I have sections that i don't want to
split over a page.  I tried a couple of ways of dealing with this, each
of which has problems.  Can anyone help?

1) Save page number and y position.  Render the section, then test new
page against old.  If we're on a new page, jump back to the saved
position, insert a page break, then jump to the end.  PROBLEM:  there
doesn't seem to be a way to move the current position to a different
page - only to different places on the same page.

2) This seems more sensible:  Create the section, but don't render it to
the page - render it to some temporary place in memory - a virtual page,
effectively (storing the virtual position first and afterwards to get
the size of the section).  If the section size is more than the distance
from the position on the real page to the margin, put a page break on
the real page.  Then render to the real page - either by copying the
contents of the virtual page or by re-rendering that section from
scratch.  PROBLEM: I can't work out how to do this. doh.

Can anyone help, either with these approaches or a better way?

thanks
max
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