Oops, small typo in the last paragraph.  It should be
XmListGetSelectedPos, not XmlListGetSelectedPos :-)

----- Original Message ----- 
From: "Dave Williss" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, August 19, 2004 4:57 PM
Subject: [Lesstif-discuss] Error in XmList


> There is an error in XmList...
> 
> Starting condition: You have a list with one item and it's selected.
> Call XmListAddItemUnselected() to add another item before it.
> Then XmListDeletePos() to delete the old item.
> 
> Problem: When adding the new item, it does not adjust the
> List_SelectedIndices, so the list still thinks item 1 (the first
> one) is highlighted when actually it's item 2.
> 
> Then when XmListDeletePos() is called, it fails to find the
> item being deleted (2) in SelectedIndices and so 
> List_SelectedItemCount() never gets decremented
> 
> Later a call to XmlListGetSelectedPos thinks that the
> List_SelectedItemCount == 1, and allocates (but doesn't 
> clear) an array of that many.  It then ignores the 
> List_SelectedIndices (they're wrong anyway) and goes 
> through every item, looking for ones where selected is
> true.  It finds none because it was deleted.  As a result, the
> caller is told that there is one item selected and the index
> of the selected item is random garbage.
> 
>  -- Dave Williss
> ------
> Meddle not in the affairs of dragons, 
>    for you are crunchy and taste good with catsup
> 
> 
> 
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