Re: NSLayoutManager and whitespace
Re: NSLayoutManager and whitespace
- Subject: Re: NSLayoutManager and whitespace
- From: Scott Thompson <email@hidden>
- Date: Thu, 13 Apr 2006 07:27:37 -0500
On Apr 13, 2006, at 6:16 AM, Ondra Cada wrote:
Scott,
On 13.4.2006, at 9:52, Scott Thompson wrote:
What I want to do is measure some text which will be drawn later.
The problem I'm having is for lines of text with trailing
whitespace. The simplest case would be a single word with a space
after it i.e. "Preferences_" (the underscore character in this
case represents a space)
When I measure this string with a text layout object, it returns a
width of something like 67 (for a particular font etc...).
If I then come back and draw that string into a field that is 67
points wide, the string hyphenates and wraps.
In my experience, NSLayoutManager indeed ignores any number of
trailing spaces, but it goes both ways: they neither are taken into
account when you get the usedRectForTextContainer:, but they *also*
are ignored when the text is actually laid out. Namely, therefore,
there should be no wrapping/hyphenation caused by trailing spaces
either.
(Which is kind of natural, for these are not two different actions,
but rather just twice the very same one: Layout Manager lays out
the text somehow; usedRectForTextContainer: just returns the
rectangle into which the text has been placed. *If* it wrapped/
hyphenated, it would return an appropriate /higher/
usedRectForTextContainer.)
Do you perhaps use a *different* service when you are "drawing the
string into 67 points"? That would explain the problem.
No, but what you are saying makes more sense than what my brain came
up with in the wee hours of the morning. The measured size is passed
back to some code that arranges the text with some other elements.
Perhaps by the time I'm asked to draw, the "draw into" rect is
different from the originally measured rect. Let me go back and
check that carefully to determine if that might be the case.
Scott
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