On Jan 26, 2011, at 8:39 AM, Matt Patenaude wrote: > Never prematurely optimize. To my knowledge, -reloadData is a pretty > intelligent method and performs incremental updates only as necessary.
No, don't do that. For NSTableView, it can't be very intelligent. It has to requery everything from the datasource/delegate, since there is no knowledge of what row lives where. Granted, that is usually fast, but still, there is no reason to redraw everything. -reloadDataForRowIndexes:columnIndexes: as a performant alternative, and all it is really does is a setNeedsDisplayInRect on the visible cells passed to it. However, none of those things are Eric's problem. Graham answered it correctly: > Have you tried [[theTable headerView] setNeedsDisplay:YES];? Alternatively, you could do a setNeedsDisplayInRect on the headerView for just the column's portion. corbin > Have you tested it to see if your application takes a noticeable performance > hit? If it doesn't, then don't second-guess the Cocoa frameworks. > > Regardless, I agree that it seems unnecessary. How are you changing the > alignment? > > -Matt > > Sent from my iPhone > > On Jan 26, 2011, at 11:05 AM, Eric Gorr <mail...@ericgorr.net> wrote: > >> I found this old thread: >> >> refreshing the header title for an NSTableColumn >> http://lists.apple.com/archives/cocoa-dev/2005/Nov/msg00659.html >> >> which describes the same problem I just faced. >> >> In my case, I needed to change the justification of the text in the header >> cell and calling setNeedsDisplay: on the table did not cause the header cell >> to redraw itself. My only option still appears to be telling the table to >> reload it's data. Of course, this could result in an unnecessary performance >> hit depending on how much work needs to be done when reloading the data. >> >> It is possible that -reloadDataForRowIndexes:columnIndexes: would cause the >> header cell to redraw if I just tell the first row and the column that >> changed to reload it's data, but I need to stay with the 10.5 SDK for the >> moment. >> >> I was only curious if there was some other better and more efficient method >> that I could use to get the header cell to redraw since this old thread from >> 2005. >> >> If there isn't, I'll file an enhancement request....it still would seem >> silly to need to call any reloadData method to get a header cell to redraw >> in this situation. >> >> _______________________________________________ >> >> 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: >> http://lists.apple.com/mailman/options/cocoa-dev/matt%40mattpatenaude.com >> >> This email sent to m...@mattpatenaude.com > _______________________________________________ > > 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: > http://lists.apple.com/mailman/options/cocoa-dev/corbind%40apple.com > > This email sent to corb...@apple.com _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
