On 6/18/13 8:05 PM, David Epstein wrote:
The question: how can I find out, by script, how big the unprintable
margins are when the Page Setup dialog has been set to some scale other
than 100%?
At 100%, there's no problem. For example, the unprintable right margin
= item 2 of the printPaperSize - item 4 of the printRectangle.
But at any other scale I can't use this calculation, because while the
"printRectangle" responds to a Page Setup choice of scale, the
"printPaperSize" does not.
Thus if I set the scale to 50%, the printRectangle of 36,36,1188,1504
tells me the pixels I can fit into a letter size page after shrinking
them by half and avoiding the unprintable margins. This means the left
unprintable margin on the printed output will be 18/72 of an inch
(shrinking the 36 by 50%). But I do not see any way of learning this
information in a script, because the 50% scaling factor is not being
reported, and the printPaperSize doesn't change the way the
printRectangle does when the scale changes. (The "printScale" seems to
return 1 regardless of what I do to the Page Setup dialog).
What I'm trying to do is show on the screen is both a rectangle that
will, when printed, be 1 inch from each edge of the paper; and also as
much space outside of that rectangle as can be printed to. Thus I need
to know how much of that 1 inch cannot be printed to.
I'm not sure I follow all that, but I'll toss out a couple of things.
The printPaperSize won't change unless the user changes the paper feed
setting in the print setup (or a script changes it) -- it's the physical
size of the paper. If they change from letterhead to envelope, the
printPaperSize will change, otherwise it won't.
Every printer has a hard, physical limitation on how far from the edges
it will print. If you get a half-inch unprintable margin at 100% scale,
it will still be the same at any other scale. The print head won't
travel any closer to the edge than half an inch.
The printRectangle represents the largest available printing area for
the paper that's currently loaded, and takes the unprintable area into
account. The scale of the printout doesn't change that available area,
though it will be filled with more or fewer pixels depending on the
print scale.
I'm not sure if you're trying to print outside the available print
region (you can't), or if you're trying to scale your card to fit it.
--
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software | http://www.hyperactivesw.com
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