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Re: Re-wrapping cells in an NSMatrix with bindings
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Re: Re-wrapping cells in an NSMatrix with bindings


  • Subject: Re: Re-wrapping cells in an NSMatrix with bindings
  • From: "Lawrence Sanbourne" <email@hidden>
  • Date: Fri, 28 Apr 2006 15:15:38 -0500

Well, I was halfway there -- I had one side of the custom bindings
implemented. I did as you said and now everything is working
perfectly! Thanks so much!

Larry

On 4/28/06, John Buckley <email@hidden> wrote:
On 28/04/06, Lawrence Sanbourne <email@hidden> wrote:
>
> Did any of this make sense? Any ideas on getting the matrix to update
> its selection based on the selectedObjects binding, or do I need to
> implement that functionality manually?
>
> Larry

I had no luck with the 'standard' NSMatrix binding keys and added my own:

items
selectionIndexes

"items" is bound to my array controller's arrangedObjects and
"selectionIndexes" to... selectionIndexes. I implemented
observeValueForKeyPath: ofObject: change: context: and handle layout
and selection changes there. Then in mouseDown: (or in the various
select* methods) I make sure that the selectionIndexes changes are
propagated back to the object I am observing.

Maybe my implementation is overkill; but I couldn't get the
multicolumn layout/selection behaviour I wanted with the standard
bindings.

Regards,

John


> > > On 27/04/06, Lawrence Sanbourne <email@hidden> wrote: > > > Hello, > > > > > > I'm developing an application with UI similar to iPhoto. I'm using an > > > NSMatrix subclass to display the photos (in this case, icons). The > > > matrix is bound to an array controller's arrangedObjects. When the > > > window is resized (or the view otherwise changes size), the matrix > > > needs to gain or lose columns, scaling accordingly, and then rewrap > > > the displayed objects. > > > > > > I've gotten it to gain and lose columns and scale properly. The > > > problem is that I'm currently doing the rewrapping by calling > > > -rearrangeObjects on the array controller, which is causing the > > > matrix's enclosing scroll view to scroll to the top and the selection > > > to be restored to the first object. > > > > > > What would be a better way of doing this that would still play nicely > > > with bindings? > > > > > > Larry > > > _______________________________________________ > > > Do not post admin requests to the list. They will be ignored. > > > Cocoa-dev mailing list (email@hidden) > > > Help/Unsubscribe/Update your Subscription: > > > > > > This email sent to email@hidden > > > > > > > > > -- > > ------------------------ > > Dr. John Buckley > > email@hidden > > > > Mac OS X Tiger > > ------------------------ > > >


-- ------------------------ Dr. John Buckley email@hidden

Mac OS X Tiger
------------------------

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References: 
 >Re-wrapping cells in an NSMatrix with bindings (From: "Lawrence Sanbourne" <email@hidden>)
 >Re: Re-wrapping cells in an NSMatrix with bindings (From: "John Buckley" <email@hidden>)
 >Re: Re-wrapping cells in an NSMatrix with bindings (From: "Lawrence Sanbourne" <email@hidden>)
 >Re: Re-wrapping cells in an NSMatrix with bindings (From: "John Buckley" <email@hidden>)

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