The correct thing to do, as the documentation implies, is to call
PMSessionCreatePageFormatList to obtain the list of paper sizes/formats
actually available for the destination printer and use the one from
that list that suits your needs. The page formats in that list reflect
the actual sheet sizes and margins for the printer.
David
On Dec 17, 2004, at 7:41 AM, a.d. jensen wrote:
(I posted this here a couple of weeks ago, and got no responses.
Hopefully someone can provide some input this time, there must be
somebody out there that has messed with printer margins before!)
I have an application which needs to override the print margins
settings to allow printing right up to the physical limitations of the
printer (or to within 1/4" of the paper edges). This is similar to the
old "Larger Print Area" setting of older print drivers.
Sorting through the headers and Apple docs found me
"PMSetUnadjustedPaperRect" which does exactly what I want, with a
singular exception (the real problem, see below.) However, it's marked
as "Not recommended" and "PMSessionCreatePageFormatList" suggested
instead, although with the caveat that that should be used if it's an
OS X application only, which isn't necessarily the case.
I WOULD have thought that PMSetAdjustedPageRect would be what you
really would use to set margins, but changing that rectangle doesn't
seem to do anything at all -- calling "GetPortBounds" on the printing
context reveals a rectangle exactly the same size as it was prior to
calling PMSetAdjustedPageRect. BTW, mucking with SetPortBounds doesn't
do anything either, although I hadn't expected it to.
Anyhoo, testing the "PMSetUnadjustedPaperRect" function works fine on
some printers, but causes others (an HP4000 in particular) to halt the
job, and on the printer LCD display say something like "Unsupported
page size, click GO to print anyway". If you hit the GO button, it
prints fine, expanded margins and all.
So, my real question is whether switching from
"PMSetUnadjustedPaperRect" to "PMSessionCreatePageFormatList" (running
on OS 9.2.2 set aside for the moment) will resolve this issue, or
whether there's another means on widening out the margins that doesn't
rely on either of these methods and can be implemented without
fluxsoring up the printer.
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