Re: Best way to notify the Controller when one Array object value is changed

FROM : Miguel Coxo
DATE : Thu Jan 31 23:37:16 2008

Well for further reference what i ended up doing was:
- Created a bogus Property "cellData" that is a function returning self
- The updated thread just used the pair willChange and didChange "cellData"
and it works

I tried the other way with the keyPathsForValuesAffectingValueForKey method,
but he wasn't called (Im using RubyCocoa might be the reason =).

On Jan 31, 2008 12:41 AM, Ken Thomases <<email_removed>> wrote:

> On Jan 30, 2008, at 3:16 PM, Miguel Coxo wrote:
>
> > On Jan 30, 2008 8:07 AM, Ken Thomases <<email_removed>> wrote:
> > On Jan 29, 2008, at 6:16 PM, Miguel Coxo wrote:
> >
> > > Hello, so i have one ArrayController that is bound to one Array,
> > and a
> > > tablecolumn that is bound to the ArrayController objects (not any
> > > particular
> > > value).
> > >
> > > As a normal behavior the controller gets notified when i add or
> > remove
> > > objects, but i have a thread that every second updates the objects.
> > > What is
> > > the correct way to notify the Controller that a specific object
> > > values where
> > > changed?
> >
> > Ty i will try that and post the result back =)
> > I did use this one* to notify the Controller of changes, maybe it
> > will also work for changing just values =).
> >
> > *  "Mutate the result of [self mutableArrayValueForKey:] rather than
> > directly mutating the array."
>
>
>
> Ah, I see what you were getting at.  You're changing properties of the
> objects in the array, and you need the controller to "notice" those
> changes even though it's not bound to those properties.  Sorry, I
> didn't understand that part of your original question.
>
> In an earlier thread I argued for a different approach to another
> reader:
>
> http://lists.apple.com/archives/cocoa-dev/2007/Dec/msg01329.html
>
> I hope that helps.
>
> Cheers,
> Ken
>
>



--
Cumprimentos, Miguel Coxo.