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(Popup) menu item visibility without core expressions? [message #1734316]

Tue, 07 June 2016 04:54

Peter Kullmann

Messages: 240
Registered: July 2009

Senior Member

I know I can control menu item visibility using core expressions. Are there any plans of allowing to control visibility using something along the lines of @CanExecute? Or is it just not possible?

OK, in general, visibility of an item cannot really depend on code in a (or in some) handler(s) - it has to be independent from that. But having a menu item with a single handler is quite a common situation where it would be great if one could specify visibility a bit simpler than using core expressions.

Peter

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Re: (Popup) menu item visibility without core expressions? [message #1734321 is a reply to message #1734316]

Tue, 07 June 2016 06:49

Dirk Fauth

Messages: 2902
Registered: July 2012

Senior Member

That is currently not supported. I also don't know any plans on that. The only thing I remember is a discussion about supporting Java based types of expressions. So it is not necessary to define core expressions. But IIRC that is currently only in the heads of a few people and we had first discussions. Nothing really finished or implemented.

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Re: (Popup) menu item visibility without core expressions? [message #1734325 is a reply to message #1734321]

Tue, 07 June 2016 07:59

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

Hi,

Dirk is right. We designed the system in a way that adding different
(I'd say simpler) expression definitions eg in Java, but nobody invested
the time (=money) to implement it.

In general you can naturally also simply modify the application-model
from eg an Addon who tracks the state (setting eg toBeRendered). The
only caveat might be that the (swt-)renderers are buggy and don't pick
up your model changes.

Tom

On 07.06.16 08:49, Dirk Fauth wrote:
> That is currently not supported. I also don't know any plans on that.
> The only thing I remember is a discussion about supporting Java based
> types of expressions. So it is not necessary to define core expressions.
> But IIRC that is currently only in the heads of a few people and we had
> first discussions. Nothing really finished or implemented.

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