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preserving tree state when updating viewer input [message #461580]

Mon, 26 September 2005 16:08

Eclipse User

Hi,
I'm getting tired of my Jface tree viewer minimizing itself after I update
the tree with new data when the user returns from a wizard. To update the
data I'm just calling the setInput method of the tree viewer with the
updated data. After I do this the tree gets minimized again.

Does anyone know how I can keep the tree expanded after setting the input?
Is there a different method to call to update the data with? Can I say
something like "expand the tree to the first level." Thanks for any ideas.
- Duncan

Re: preserving tree state when updating viewer input [message #461581 is a reply to message #461580]

Mon, 26 September 2005 16:19

Eclipse User

Originally posted by: sunil_kamath.nohotspammail.com

"Duncan Krebs" <duncan@krebsnet.com> wrote in message
news:910dade3fa42f6ba732e1ec296c89bef$1@www.eclipse.org...
> Hi,
> I'm getting tired of my Jface tree viewer minimizing itself after I update
> the tree with new data when the user returns from a wizard. To update the
> data I'm just calling the setInput method of the tree viewer with the
> updated data. After I do this the tree gets minimized again.
> Does anyone know how I can keep the tree expanded after setting the input?
> Is there a different method to call to update the data with? Can I say
> something like "expand the tree to the first level." Thanks for any
> ideas. - Duncan
Instead of calling setInput, why not just update the model and call
refresh()?
---
Sunil

Re: preserving tree state when updating viewer input [message #461708 is a reply to message #461581]

Tue, 27 September 2005 15:48

Eclipse User

Sunil Kamath wrote:

> Instead of calling setInput, why not just update the model and call
> refresh()?
> ---
> Sunil

Thanks for the suggestion, I rewrote my code so it does that. After the
model update and refresh it keeps the first level of the tree expanded but
does not preserve the state of additional levels that were expanded before
the refresh (it closes them all but the first level). Do you know if this
is regular behavior?

Re: preserving tree state when updating viewer input [message #461709 is a reply to message #461708]

Tue, 27 September 2005 16:30

Eclipse User

Originally posted by: sunil_kamath.nohotspammail.com

"Duncan Krebs" <duncan@krebsnet.com> wrote in message
news:9aed499027baa2ab2786912fc387a3b5$1@www.eclipse.org...
> Sunil Kamath wrote:
>
>> Instead of calling setInput, why not just update the model and call
>> refresh()?
>> ---
>> Sunil
>
> Thanks for the suggestion, I rewrote my code so it does that. After the
> model update and refresh it keeps the first level of the tree expanded but
> does not preserve the state of additional levels that were expanded before
> the refresh (it closes them all but the first level). Do you know if this
> is regular behavior?
>
I think it depends upon which elements were changed.
Do you have a working snippet that shows the problem?
---
Sunil

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