dfepstein at comcast.net
Wed Jun 19 18:49:50 EDT 2013
Jacqueline Gay lucidly explained printing settings, including this:
Every printer has a hard, physical limitation on how far from
it will print. If you get a half-inch unprintable margin at
it will still be the same at any other scale.
Yes, the unprintable margins are fixed, but what are they?
PrintRectangle reports their size in screen pixels, but that will
only be their size on the printed page if the page setup scale is 100%.
It appears that LC lets us either
(a) use the full printable area of the paper (print card into rect
the printRectangle), OR
(b) place things at precise locations on the paper (leave a safe
margin of empty space on all sides of a card whose dimensions are
equal or proportional to the printPaperSize, then print into rect
“0,0,” & the printPaperSize)
– but not both.
Unless my script can know what scale is governing the result of the
printRectangle, it cannot position an object that will be exactly one
inch from the top of the printed page using method (a).
If the left and right unprintable margins were always symmetrical,
the "pageSetupScale" I'm looking for could be derived as
100 * item 1 of the printPaperSize / ( item 1 of the printRectangle +
item 3 of the printRectangle).
But this symmetry was found on only one of the two printers I tested.
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