[bugs #9487] NSOutlineView reloadItem generates errors

[Fred Kiefer]

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/**************************************************************************/
[bugs #9487] Latest Modifications:

Changes by: 
                Fred Kiefer <FredKiefer@gmx.de>
'Date: 
                Sat 07/03/2004 at 16:36 (GMT)

            What     | Removed                   | Added
---------------------------------------------------------------------------
              Status | Open                      | In Test


------------------ Additional Follow-up Comments ----------------------------
The specific problem should be fixed now, but investigation did show loads of 
issues in the outline view code. We really should try and find somebody to 
check to whole class.






/**************************************************************************/
[bugs #9487] Full Item Snapshot:

URL: <http://savannah.gnu.org/bugs/?func=detailitem&item_id=9487>
Project: GNUstep
Submitted by: Rob Burns
On: Tue 06/29/2004 at 03:06

Category:  Gui/AppKit
Severity:  5 - Average
Item Group:  Change Request
Resolution:  None
Assigned to:  None
Status:  In Test


Summary:  NSOutlineView reloadItem generates errors

Original Submission:  NSoutline reloadItem: generates an "NSNull does not 
respond to setObjectForKey:" error and an "NSInvalidArgumentException: Tried to 
insert nil to arrray" error most (not all) of the times it is called.

Example code for this can be found at 
http://www.eskimo.com/~pburns/rob/misc/NSOutlineView-reloadItem.tar.gz
It's a GSTest bundle.

Follow-up Comments
------------------


-------------------------------------------------------
Date: Sat 07/03/2004 at 16:36       By: FredKiefer
The specific problem should be fixed now, but investigation did show loads of 
issues in the outline view code. We really should try and find somebody to 
check to whole class.

-------------------------------------------------------
Date: Fri 07/02/2004 at 19:23       By: FredKiefer
Opened again, due to Robs new failing example

-------------------------------------------------------
Date: Thu 07/01/2004 at 23:38       By: rburns
Thanks, that indeed fixed the problem I was having. Though, I have found 
others. I was expecting reloadItem to redisplay the item as well. This doesn't 
currently happen under GNUstep. 

I modified the test a little bit to check for this too. I also got the test 
running on OSX, and can verify that on OSX, the item is redisplayed. A new one 
is here:

http://www.eskimo.com/~pburns/rob/misc/Testing-20040701.tar.gz

Also, after playing with the test a bit more I found that if you reproduce the 
following steps:

1) open the NSOutlineView test
2) expand the 'wet' item
3) select the 'wet' item
4) check the 'Children' checkbox
5) press the 'Reload Selected Item' button

The contents of the OutlineView will disappear 

-------------------------------------------------------
Date: Thu 07/01/2004 at 18:42       By: FredKiefer
This problem is caused by the inconsistent use of NSNull in NSOutlineView. The 
shared null object is used here for  the key nil in object mappings, but 
sometimes when iterating over the keys the reverse conversion is not applied.
I changed that and the code is now working for me.












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