> Probably wherever you do the -setNeedsDisplay: for the view would be about
> right... ;-)
Unfortunately that's not a good place either - the window's shadow
needs to be invalidated after the drawing actually occurs, not just
when the dirty flag is set.
Instead of -setNeedsDisplay:, I think your best bet is:
[[cView window] display];
[[cView window] invalidateShadow];
Or if you can target Snow Leopard, I remember seeing some 'NSView did
draw' delegate methods...
> I see that the end of drawRect: is indeed a bad place to do it. The app's
> CPU % use jumps from ~1% to 2%~3%. I'll have a play/think about where to do
> it. Maybe in the custom window class or the app delegate.
I don't think you're going to be able to avoid the increased CPU
usage. Invalidating the window's shadow forces it to redraw, which
inevitably will cost some CPU cycles - there's no way around that; it
doesn't matter where you actually tell it to invalidate the shadow.
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