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Important for all Apple Printing and Graphics Developers:
The information in this Technical Q & A is still relevant up to and including
Mac OS 7.6
with QuickDraw GX 1.1.5. Beginning with the release of Mac OS 8.0,
however, Apple plans to deliver a system which incorporates QuickDraw GX
graphics and typography only. QuickDraw GX printer drivers and GX printing
extensions will not be supported in Mac OS 8.0 or in future Mac OS releases. Apple's
goal is to simplify the user experience of printing by unifying the Macintosh
graphic and printing architectures and standardizing on the classic Printing
Manager.
For details on Apple's official announcement, refer to
</dev/technotes/gxchange.html>
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Q: I need to fetch 'ptyp' resources using the FetchTaggedData routine,
so I can disallow paper sizes which are too big for the current configuration
of my printer. How can I do this?
A: To fetch 'ptyp' resources with FetchTaggedData, override the gxDoesPaperFit
message. In QuickDraw GX 1.0.x, we only send this message when it is time to
configure the input-trays dialog. Version 1.1.1 of GX sends this message
whenever a tray reload can occur for a mismatch dialog and for the input-trays
dialog. This technique should suffice, since the only thing you need to
restrict is the paper that's actually in your printer. For example, users
should still be allowed to format for larger sizes and scale down to your
printer's actual paper size during a paper mismatch.
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