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Re: Questions about NSPopupButtonCell and NSBrowser
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Re: Questions about NSPopupButtonCell and NSBrowser


  • Subject: Re: Questions about NSPopupButtonCell and NSBrowser
  • From: "Frank D. Engel, Jr." <email@hidden>
  • Date: Thu, 04 Jun 2015 16:38:40 -0400


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.

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  • Follow-Ups:
    • Re: Questions about NSPopupButtonCell and NSBrowser
      • From: Graham Cox <email@hidden>
References: 
 >Questions about NSPopupButtonCell and NSBrowser (From: "Frank D. Engel, Jr." <email@hidden>)
 >Re: Questions about NSPopupButtonCell and NSBrowser (From: Graham Cox <email@hidden>)
 >Re: Questions about NSPopupButtonCell and NSBrowser (From: "Frank D. Engel, Jr." <email@hidden>)
 >Re: Questions about NSPopupButtonCell and NSBrowser (From: "Frank D. Engel, Jr." <email@hidden>)
 >Re: Questions about NSPopupButtonCell and NSBrowser (From: Graham Cox <email@hidden>)

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