Re: scrollRangeToVisible is slowing me down
Re: scrollRangeToVisible is slowing me down
- Subject: Re: scrollRangeToVisible is slowing me down
- From: Dan Saul <email@hidden>
- Date: Thu, 24 Feb 2005 08:18:01 -0600
You could use NSClipView's -scrollToPoint: instead which should be
much less cpu intensive.
On Wed, 23 Feb 2005 18:32:17 -0500, Adam <email@hidden> wrote:
> I had that idea, but it should behave the way people are used to logs
> and consoles behaving.- adding to the end. I found some evidence that
> scrollRangeToVisible is O(N). Am I crazy or is what I am trying to do a
> normal kind of task I see in many programs. There must be a way to do
> this without O(N) lag.
>
> http://borkware.com/quickies/one?topic=NSTextView
>
>
> On Feb 23, 2005, at 5:09 PM, Justin Spahr-Summers wrote:
>
> > Maybe instead of using scrollRangeToVisible, you could just insert new
> > text at the beginning rather than the end. That might speed it up a
> > bit, but I don't know for sure.
> >
> > On Wed, 23 Feb 2005 01:42:41 -0500, Adam <email@hidden> wrote:
> >> I have an NSTextView acting as a log. While the app is running it is
> >> constantly writing lines of text to the NSTextView. During times of
> >> heavy traffic the APP lags. I have noticed that one of the biggest
> >> overheads is the scrollRangeToVisible method. Without this method the
> >> text is added to the end of the NSTextView and the user must scroll
> >> down after each line is written. How can I keep the most recently
> >> updated area visible to my user without taking a performance hit.
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