Over the past 5 years, according to Google, many people have asked why
-[NSAttributedString boundingRectWithSize:options] does not honor the proposed
height constraint, but nobody has posted the answer. Can somebody explain this
to me?
The bounding rect of myMutableAttributedString is {{0, 0}, {450.117, 1285}},
when the width is constrained to 486 and the height is not contrained (i.e.,
height is set to 0.0). When I eyeball the string in its window on the screen,
these dimensions appear to be about right.
With a printing page height of 612, it should take 3 pages to print. To get the
bounding rect for the first page to print, I run this code fragment in my
printing NSView object:
NSSize proposedSize = NSMakeSize(486, 612);
NSLog(@"proposedSize: %@", NSStringFromSize(proposedSize));
NSRect pageRect = [myMutableAttributedString boundingRectWithSize:proposedSize
options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
| NSStringDrawingDisableScreenFontSubstitution];
NSLog(@"pageRect: %@", NSStringFromRect(pageRect));
These values are logged in the console:
proposedSize: {486, 612]
pageRect: {{0, 0}, {450.117, 1285}}
Why isn't pageRect being returned as something close to {{0, 0}, {450.117,
612}? -- where the 612 page height would of course be expected to come out a
little less than 612 to accommodate the vertical line heights.
Including NSStringDrawingTruncatesLastVisibleLine in options doesn't change
anything.
The documentation leaves me with the impression that the whole point of this
method is to return the largest rect that will honor the size constraint by
cutting off the text at the height constraint while it is being laid out within
the width constraint. Have I misunderstood?
--
Bill Cheeseman
b...@cheeseman.name
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