Re: Forcing a refresh on a bound control

FROM : Scott Stevenson
DATE : Mon May 19 08:42:46 2008

On May 18, 2008, at 8:04 PM, David Dunham wrote:

> I've got a key which is calculated (it's the number of topics which 
> are filtered by a search string). As the user types into a search 
> field, I need to update this derived value. How else can I let KVO 
> know the calculated value has changed, so it can be displayed in the 
> UI?


In general, you can just set derived keys to be dependent on the 
"real" key, and the change notifications happen automatically. On 
Tiger, you use +setKeys:triggerChangeNotificationsForDependentKey: in 
+initialize.

Are you able to use this?

      - Scott