Re: [MACTCL] Minor bug in Tck/Tk 8.5.17: hidden widgets flicker on <Expose>

[Russell O. <ro...@uw...>]

On 12/5/14 6:40 PM, Kevin Walzer wrote:
> On 12/5/14, 7:54 PM, Russell Owen wrote:
>> Clearly this is merely a cosmetic annoyance. Nonetheless, I'm reporting
>> it and asking if anyone can suggest a reasonable workaround. The only
>> one I've thought of, so far, is to hide widgets using grid.forget
>> instead of grid.remove (I have not verified that works, but I'd be
>> amazed if it didn't). That's a bit of a nuisance because I'll have to
>> record the grid parameters, but it's certainly doable. If anyone has a
>> better idea I'd love to hear it.
>
> I'm aware of issues like this; they are likely a side effect of my
> removing the private Cocoa API calls from Tk that are a big no-no under
> Apple's guidelines but which undeniably improved the drawing
> performance. In other words, removing them has resulted in degraded
> drawing performance, which is why they were put there in the first place.
>
> It's a tough call, but as I discussed on the list a few months ago, I
> think keeping them in there was simply a bad idea because Apple's
> distribution channels so strongly discourage them. The Mac App Store
> rejects any apps making use of private API calls, for instance.
>
> I don't know of a way to substantially improve drawing performance; I
> (and other contributors) have spent a lot of time tweaking things and
> fixing the worst of the bugs, but that won't change the fundamental
> issue. I'm sorry about that. It's a lousy situation, and I wish Apple's
> guidelines did not put us in this position.

I appreciate all the work you have put into Aqua Tk and we can certainly 
live with the flicker.

-- Russell