Re: outlineViewSelectionDidChange not called

FROM : Jonathan Dann
DATE : Tue Mar 25 15:29:05 2008

Have your tried binding the tree controller's @"selectionIndexPaths" 
binding to a variable in your model object?

I havent tried it but it seems that you can do this in IB and then get 
the model to observe the bound instance variable and you cab then see 
each time the variable changes. Not sure if it will cover all the 
bases you need though.

You'd get an array if selection index paths and then just see if the 
count of the array is 1 for single selection or more if you have 
multiple.

Jonathan Dann

On 25 Mar 2008, at 05:42, "Adam Gerson" <<email_removed>> wrote:

> Hey Jens,
>
> Thanks for getting back to me.
>

>>> When I
>>> remove an object from the TreeController the row representing the
>>> deleted object disappears and OutlineView selects the next row, but
>>> does not send a notification to the delegate method
>>> outlineViewSelectionDidChange.

>>
>> IIRC, the notification is only sent on user-generated selection
>> changes. If you programmatically change the selected item (directly 
>> or
>> indirectly) you need to call your observer method manually, if
>> necessary.
>>

>
> There are times when this is a problem. My observer method uses the
> "currently selected tree node" as the object to work with. However,
> after a programatic insert, the inserted object doesn't become the
> selected item of the treecontroller. I have selectsInsertedObjects set
> to YES. Likewise, after an undo of a delete the outline view
> graphically selects the newly resurected object, but that object does
> not become the tree controller's selected object.
>
> What I need is a way to ensure the OutlineView's selection and the
> TreeController's selection always are in sync. I thought this was the
> promise of bindings.
>

>>

>>> On a separate but related note, when I add an object to the
>>> TreeController is there away to get the OutlineView to automatically
>>> select the new row?

>>
>> Check the "Select Inserted Objects" box in the IB inspector for the
>> controller.
>>

> I have this box checked. It appears not to work when I
> programmatically insert an object. It does work if I bind a button to
> the insert method of the controller.
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