Re: NSArrayController and avoidsEmptySelection
Re: NSArrayController and avoidsEmptySelection
- Subject: Re: NSArrayController and avoidsEmptySelection
- From: "I. Savant" <email@hidden>
- Date: Wed, 29 Jul 2009 09:24:19 -0400
On Jul 29, 2009, at 8:19 AM, Carmen Cerino Jr. wrote:
I have an NSArrayController hooked up to an NSCollectionView. When a
user clicks into the empty space of the NSCollectionView, I would like
it so they do not lose their currently selected items. I would have
thought it should have been as simple as telling the NSArrayController
to avoid empty selections. However, I do not get the desired result
when this property is set. Is there something else that needs to be
setup in order for this to work as expected or is my assumption about
what that property is suppose to do completely wrong?
I would file this as a bug. NSCollectionView and NSArrayController
should work the same as NSTableView and NSArrayController in this
regard.
In order to temporarily achieve the desired effect, I ended up
subclasing NSArrayController and overriding the setSelectionIndexes:
method to ignore index sets with a count of 0. However, this seems
more like a work around than a solution.
Since it's broken, the only way to ensure this works properly in
Leopard is to implement a work-around. I don't see any problem with
yours. It's what I would probably end up doing.
One caveat in case it hadn't occurred to you (you didn't say): I
would only implement this logic if there is at least one object in the
array controller's contents.
--
I.S.
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