I haven't found a method of that name in any documentation,
including NSRulerView.h. Is this a private method?
Yes
Is it safe to rely on it?
In that it's never safe to rely on undocumented private methods,
no. Not only can they go away or do something else, people using
them have caused Apple engineers to have to make special workarounds
to try to keep things from breaking in future versions (there is
some special behavior with table views, for example, that is based
on what SDK you link against - pretty much my definition of an ugly
workaround).
Thanks, Glenn. I've filed a bug (5717504) asking that
drawBackgroundInRect: be declared public. In the meantime, I guess
there's no alternative but to use it anyway. NSRulerView uses the
window background color as its background, and it looks terrible if
the window is textured.
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