On 3/3/09 6:38 PM, James Walker said:

>I want to use bindings to set certain control attributes (enabled state,
>tool tip) depending on the number of selected rows in an outline table.
>  I have a controller object that owns an NSOutlineView, and I gave it
>an accessor
>
>- (NSOutlineView*) outlineView;
>
>Then I tried to bind to my controller with key paths like
>outlineView.numberOfSelectedRows and outlineView.selectedRowIndexes, and
>using value transformers.  It looks like the bindings are setting the
>attributes appropriately once, but then not updating when the selection
>changes.  Are these NSOutlineView methods not KVO-friendly, or am I
>doing something wrong?

Are you using NSTreeController?  If so, you can bind to
selectionIndexPaths and use @count also.

--
____________________________________________________________
Sean McBride, B. Eng                 s...@rogue-research.com
Rogue Research                        www.rogue-research.com
Mac Software Developer              Montréal, Québec, Canada


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