Re: Questions about NSPopupButtonCell and NSBrowser
Re: Questions about NSPopupButtonCell and NSBrowser
- Subject: Re: Questions about NSPopupButtonCell and NSBrowser
- From: Graham Cox <email@hidden>
- Date: Fri, 05 Jun 2015 08:43:12 +1000
> On 5 Jun 2015, at 6:38 am, Frank D. Engel, Jr. <email@hidden> wrote:
>
>
> On 6/3/2015 20:29, Graham Cox wrote:
>>> On 4 Jun 2015, at 10:20 am, Frank D. Engel, Jr. <email@hidden> wrote:
>>>
>>> I am wondering if the browser is actually caching an image of the cells in the second column when I switch away, then just displaying that without actually recreating the cells in the second column until it needs one of them for something? That might explain the behavior I am seeing, and may be a sensible optimization in most cases, but in this instance it is not very helpful for my particular application.
>>
>> Sounds very doubtful.
>>
>> [self controlView] is probably unreliable in your cell - you might want to check it. But even if it’s correct (being the NSMatrix for the browser column) invalidating the whole thing is going to be very sub-performant (though should work).
>>
>> Note that NSBrowser, unlike a NSTableView, allocates one cell per row within a NSMatrix - it does not reuse and redisplay a single cell.
>>
>> —Graham
>>
>>
>>
> My method isn't even being called at that point, so it never gets that far.
>
Which method? Unfortunately the problem isn’t very clearly stated, so I don’t know if it’s the view refresh that you're having trouble with (as I supposed) or some other meaning of “refresh” that you’re applying.
—Graham
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