On Aug 6, 2013, at 9:00 AM, Steve Mills <smi...@makemusic.com> wrote:
> On Aug 5, 2013, at 12:34:11, Kyle Sluder <k...@ksluder.com> wrote: > >> Try turning off copies-on-scroll on your scroll view. > > That seems to do the trick. Thanks. I'm grabbing its state, turning it off, > scrollPoint, then setting it back. If scrolling your view always requires a redraw, I’d just turn it on in the nib and leave it on. Also, since we now know how copiesOnScroll affects things: are you sure you were seeing double drawing? The way it's supposed to work is that the scrolling methods call -scrollRect:by: to blit your contents into the new position, then you get -setNeedsDisplay: in the newly-exposed rects. However you are noticing that you have scrolled, you are presumably calling [self setNeedsDisplay], so you should therefore only actually draw once on the next turn of the display loop. Turning off copiesOnScroll will avoid the unnecessary blit, but if you were actually seeing two -drawRect: calls for every scroll then something else is afoot. --Kyle Sluder _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
