Re: Apple's Code Level Support

FROM : Keith Blount
DATE : Thu Mar 31 21:28:07 2005

Hello Max,

I'm sure you have tried this already, but I'd be
interested in what you found... I know that Ulysses
has a split view so that you can view the same text in
two text views. Presumably the text storages are
shared by doing something like [[secondTextView
layoutManager] replaceTextStorage:[firstTextView
textStorage]]. If so, did you try removing this call,
or did you try creating a test app with only your main
text view and the associated line numbers view - ie.
without a second text view that shares the text
storage?

The reason I ask is that I have come across the same
problem myself. I also had a second text view that
shared the text storage, and when I got rid of the
above line, the  text redraw problem disappeared.
Obviously, though, this doesn't help, as you want a
second text view, but it may help narrow down the
problem.

Actually, I have encountered the same weird slow
redrawing problem very occasionally in Xcode and even
TextEdit. Even if you just set up a simple project
with two text views that share the same text storage,
fill one with a lot of text, and then mess around
hitting enter or deleting a lot of newlines really
quickly, you can *sort of* replicate the problem,
except that it is nowhere near as slow as in the movie
you posted or in my own problematic view. I had to
completely rewrite my own view anyway, and the problem
has *hopefully* gone away - and I still have no idea
what in my old code is causing the weird slow redraw
if the text storage is shared with another text view.

Cheers,
Keith


       
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