[news.eclipse.platform.swt] Re: question re. TableTree-viewer's refresh

["Michael Moser" <mmo@xxxxxxxxxxxxxx>]

"Tom Schindl" <tom.schindl@xxxxxxxxxxxxxxx> wrote in message 
news:ejhl8l$rgo$1@xxxxxxxxxxxxxxxxxxxx
> Hi,
>
> first of all TableTreeViewer should have been deprecated in 3.2 and 
> you should better use a TreeViewer instead.

Yes, that's what I am using. I grew acustomed to the old name (when I 
use it in that "tabletree-mode"), but actually I am using the new 
TreeViewer.

> If you only want to refresh a specific part of your tree then you 
> could use refresh(Object,boolean) and not the whole tree gets 
> refershed on the other hand TreeViewer tries to preserve the selection 
> which doesn't work for you it seems.
>
> I guess you are recreating *all* model elements from scratch everytime 
> your content-providers getElements-method is called. If that's the 
> case TreeViewer/TableTreeViewer is not able to preservet the selection 
> and you need this your own.

You are right. I hadn't been aware that I was actually recreating the 
elements, but since the model only provides the children as collection 
while the ITreeContentProvider
has to return them as array, in getChildren() I am actually creating a 
new array containing the children each time.

Hm, but wait a minute: the *content* of those arrays are always the very 
same objects each time.  Or is the model only passing out copies, only?
<5 minutes later:>
Grrr - Indeed! The model passes out copies only! %$#&@!!! I need to have 
a chat with some (too) security/stability minded folks... :-(

Michael