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Tim R Johnson #1
Negative NSSize Values
I have a question regarding negative NSSize values. Let me first state that
the apple documentation says regarding NSSize...
"The values for width and height should never be negative."
How is this suppose to work in, for example, [NSView scrollRect:by:]? How
would you be able to scroll back, if your NSSize cannot be negative.
So we just ignore the comment from Apple or am I misunderstanding this?
Thanks
TRJ
Tim R Johnson Guest
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Michael Ash #2 Re: Negative NSSize Values
In article <BB66AA69.3E2F%nospam@nospam.org>,
Tim R Johnson <nospam@nospam.org> wrote:
That is a fascinating comment in the documentation. I think this is more> I have a question regarding negative NSSize values. Let me first state that
> the apple documentation says regarding NSSize...
> "The values for width and height should never be negative."
> How is this suppose to work in, for example, [NSView scrollRect:by:]? How
> would you be able to scroll back, if your NSSize cannot be negative.
> So we just ignore the comment from Apple or am I misunderstanding this?
a fault in the APIs; scrollRect:by: shouldn't be taking an NSSize, since
it's not looking for a "size", it's just looking for some deltas. But
anyway, you can see that the width and height are defined as floats, and
so can hold negative numbers, so my advice would just be to ignore it.
Michael Ash Guest
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John C. Randolph #3 Re: Negative NSSize Values
Tim R Johnson wrote:
I'd say that qualifies as a documentation bug. There are several other>
> I have a question regarding negative NSSize values. Let me first state that
> the apple documentation says regarding NSSize...
> "The values for width and height should never be negative."
> How is this suppose to work in, for example, [NSView scrollRect:by:]? How
> would you be able to scroll back, if your NSSize cannot be negative.
> So we just ignore the comment from Apple or am I misunderstanding this?
places I can think of where a negative size comes in handy.
It's true though, that when the size in question is part of an NSRect
structure, a negative width or height would be considered an error.
Would you mind filing that at bugreporter.apple.com?
-jcr
PS: you can pass negative values to NSInsetRect() to get a rect that's
larger than the one you pass in.
John C. Randolph Guest
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