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Re: Scrolling NSScrollView by fractional amounts - why would values get rounded?

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Re: Scrolling NSScrollView by fractional amounts - why would values get rounded?

Subject: Re: Scrolling NSScrollView by fractional amounts - why would values get rounded?
From: Graham Cox <email@hidden>
Date: Fri, 11 Sep 2009 14:16:48 +1000


On 11/09/2009, at 4:41 AM, Jens Alfke wrote:

This works fine when the new y value is a whole integer, but I'm
seeing some strange behaviour when trying to scroll by fractional
amount (e.g. .25 or .5 of a pixel).
Are you sure you want to scroll by fractional pixels? It will be slower, because the view has to re-render from scratch, instead of letting the video card scroll the pixels.


Is one set to copy on scroll and the other not?

But yes, it's a bad idea, IMO.

--Graham


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Re: Scrolling NSScrollView by fractional amounts - why would values	get rounded?
From: Martin Redington <email@hidden>


References:  
  >Scrolling NSScrollView by fractional amounts - why would values get	rounded? (From: Martin Redington <email@hidden>)
  >Re: Scrolling NSScrollView by fractional amounts - why would values	get rounded? (From: Jens Alfke <email@hidden>)




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