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Re: Adding items to an NSOutlineView
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Re: Adding items to an NSOutlineView


  • Subject: Re: Adding items to an NSOutlineView
  • From: Scott Anguish <email@hidden>
  • Date: Tue, 14 Oct 2003 16:43:43 -0400

On Oct 14, 2003, at 3:12 PM, Darrin Cardani wrote:

I have an NSOutlineView in one of my windows, and it works initially. I create a single item for the list it's displaying, and it displays the first item correctly and I can turn it down and see it's children. However, when I add a second item to the list, it doesn't add the item to the outline view. I've tried just calling this:

[ outlineView setNeedsDisplay:YES];

but it doesn't work. It appears that the NSOutlineView is not sending its delegate the -numberOfChildren: message. I've tried:

[ outlineView reloadItem:nil reloadChildren:YES ];

but it raises an exception on the passed in item. I was hoping it would use nil to mean the root object, like it expects the delegate to use. Next I tried getting the actual object from my list and calling:

You should have the root object somewhere, and you could pass that.

Or.. NSOutlineView is a subclass of NSTableView.. have you tried just using reloadData?


[ outlineView reloadItem:theItem reloadChildren:YES ];

It no longer raises an exception, but also does not show the new object. So how do I get the view to realize that there's a new object, and that it needs to display it?


You'd want to reload the parent of "theItem".
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 >Adding items to an NSOutlineView (From: Darrin Cardani <email@hidden>)

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