That's a bad idea. Use viewWillDraw for this approach Sent from my iPhone
> On Feb 5, 2016, at 9:26 AM, Graham Cox <graham....@bigpond.com> wrote: > > >> On 5 Feb 2016, at 10:52 AM, Jeff Evans <jev...@ars-nova.com> wrote: >> >> Clark, it's a music app; a piece is composed and placed on the screen; >> there's a lot of massaging going on as the music adjusts visually. I want >> the play of the example to begin once there are no more updates remaining. >> That is no noticeable delay in terms of human time, but makes a difference >> in the appearance. >> >> So I figure: the system presumably knows if it is about to send more redraw >> requests to that view. Is there any way I could know what it knows? > > > Personally, I think you are abusing the view here - it should obediently > display what it’s told, not be part of your underlying logic. > > However, there’s an easy-ish way to do what you want, if a little hacky. > > > - (void) drawRect:(NSRect) dirty > { > [NSObject cancelPreviousPerformRequestsWithTarget:self > selector:@selector(doStuffWhenIdle) object:nil]; > > /* do whatever you need to draw the view */ > > [self performSelector:@selector(doStuffWhenIdle) withObject:nil > afterDelay:MY_IDLE_TIME]; > } > > > - (void) doStuffWhenIdle > { > // will be called once there are no more -drawRect calls and MY_IDLE_TIME > has elapsed > > > …. > } > > > > ―Graham > > > > _______________________________________________ > > 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/dangerwillrobinsondanger%40gmail.com > > This email sent to dangerwillrobinsondan...@gmail.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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com