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Re: Binding CoreData Relationship to an NSTableColumn w/ NSPopupButtonCell [Solved?]
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Re: Binding CoreData Relationship to an NSTableColumn w/ NSPopupButtonCell [Solved?]


  • Subject: Re: Binding CoreData Relationship to an NSTableColumn w/ NSPopupButtonCell [Solved?]
  • From: Bill Coleman <email@hidden>
  • Date: Tue, 26 Jun 2007 21:05:13 -0400


On Jun 26, 2007, at 12:32 AM, mmalc Crawford wrote:


On Jun 25, 2007, at 8:22 PM, Bill Coleman wrote:

[...]
So, how do I get both -- I want my Entry value to show up in the table, and all the Selection values to show up in the Popup -- ? Why does the Insert Null Placeholder modify the display of the table?


You've almost certainly set up a binding incorrectly.

<Sigh> That was my thought, too. However, after exhaustively trying just about every combination of bindings, I decided to ask a question on CocoaDev.


Why not just create an "automatic" UI using Interface Builder (drag the Entry entity into a window)? It should set up the Selection popup and associated array controller for you...

Well, that certainly was a worthwhile tip!

It looks like this is a bug in either Interface Builder or NSPopupButtonCell. If I select a type of Pulldown (instead of the default of Popup) for NSPopupButtonCell, and I uncheck the Inserts Null Placeholder checkbox for either the content or contentValues binding for the enclosing NSTableColumn, it exhibits this odd behavior. An NSPopupButton works correctly.

I've created a sample project that demonstrates this. I'll file a bug report next.

In the meantime, I'll switch back to using a type of Popup.

Bill Coleman, AA4LR, PP-ASEL        Mail: email@hidden
Quote: "Boot, you transistorized tormentor! Boot!"
            -- Archibald Asparagus, VeggieTales

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References: 
 >Binding CoreData Relationship to an NSTableColumn w/ NSPopupButtonCell (From: Bill Coleman <email@hidden>)
 >Re: Binding CoreData Relationship to an NSTableColumn w/ NSPopupButtonCell (From: mmalc Crawford <email@hidden>)

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