Thanks Quincey.

removeObjectAtArrangedObjectIndexPath works but remove: still does not.  It 
should remove the object, if there is a bug then I will file a bug report.  
anyone have ideas as to why remove: may not be working.  I hate to find another 
way and drop a possible issue/bug.  Thanks.

-Tony


On May 14, 2010, at 4:55 PM, Quincey Morris wrote:

> On May 14, 2010, at 15:39, Tony Romano wrote:
> 
>> I have a NSOutlineView bound to a NSTreeController in class mode(i.e. each 
>> NSTreeNode represents my Node object).  Everything up to now is working 
>> fine.  I am trying to remove a single node in the outline view by calling 
>> [outlineView remove:self] as a test.  The documents are pretty simple and 
>> they state that the remove: method removes the selected item, simple enough. 
>>  I've put some test code around the remove.  The test code is looking at the 
>> selected node Before the remove then looking at the selected node 
>> again(assuming the controller picked a new selection).  The before and after 
>> are the same which is also reflected in the UI.  I verified this in the 
>> debugger.  Here's the snippet.
>> 
>>      ...
>>      NSArray * selectedObjects = [outlineController selectedObjects];
>> 
>>      // Only selecting one node for the test, it should be at index 0.
>>      Node * node = [selectedObjects objectAtIndex:0];
>>      NSIndexPath * paths = [outlineController selectionIndexPath];
>> 
>>      [outlineController remove:self];
>>      selectedObjects = [outlineController selectedObjects];
>> 
>>      node = [selectedObjects objectAtIndex:0];
>> 
>>      paths = [outlineController selectionIndexPath];
>> 
>> 
>> The canRemove binding which is hooked up to the menu item, is working(Menu 
>> Item is enabled).  Is there some setting I am completely overlooking. 
>> Searching has come up empty handed.
> 
> You read the documentation for 'remove:' but apparently not all of it:
> 
>> Special Considerations
>> Beginning with Mac OS X v10.4 the result of this method is deferred until 
>> the next iteration of the runloop so that the error presentation mechanism 
>> can provide feedback as a sheet.
> 
> So of course it hasn't been done when you check immediately after invoking 
> the 'remove:' action. If you want it to happen immediately, you would need to 
> use 'removeObjectAtArrangedObjectIndexPath:' instead.
> 
> But ...
> 
> Depending on where this code is, it may be a lousy idea to do the removal via 
> the tree controller anyway. You're always better off changing the data model 
> directly (the thing that is providing the tree controller with content).
> 
> If I say this often enough, one day someone might listen.
> 
> 
> 
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-Tony

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