Just one more note - the System was designed in a way that core-expressions was 
one option one can itsown model element and implement something completely 
different but i have not looked at the rendering code.

Tom

Von meinem iPhone gesendet

> Am 20.01.2014 um 19:10 schrieb Paweł Doleciński <[email protected]>:
> 
> @Dirk
> Solution presented in tutorial should work, you are right. Could be I did 
> something wrong but I didn't work for me. I will check this again tomorrow, 
> maybe it was problem with my configuration.
> 
> Anyway, so far using core expressions with model is not trivial and would be 
> easier to have that DI based concept.
> 
> --
> Pozdrawiam / Best regards
> Paweł Doleciński
> 
> 
>> On 20 January 2014 17:16, Paul Webster <[email protected]> wrote:
>>> On Mon, Jan 20, 2014 at 8:00 AM, Tom Schindl <[email protected]> 
>>> wrote:
>>> Hi,
>>> 
>>> Well the model is the backing state of the UI which is represented by
>>> the visible-attribute and the renderer should act according to this
>>> attribute.
>>> 
>>> Now we have the situation that this value is calculated based upon 2
>>> informations:
>>> a) the value of the attribute
>>> b) the value of the expression
>> 
>> visibleWhen is in the model, but it is used by our renderer to set the 
>> visible flag on the model elements (which then drives the visibility).  So 
>> arguably it doesn't have to be the renderer that cares  about visibleWhen 
>> (although in our case the renderer makes visibleWhen callouts when a menu is 
>> about to show, but that updates the model visible flag which then updates 
>> the SWT widgets)
>> 
>> Later,
>> PW
>> 
>> -- 
>> Paul Webster
>> Hi floor.  Make me a sammich! - GIR
>> 
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