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TO ACTIVATE "Delete from Diagram" ACTION [message #191393]

Fri, 06 June 2008 09:25

Carmine

Messages: 8
Registered: July 2009

Junior Member

Hi to everybody,
I am realizing an editor graphic with GMF and I would like to train the
action of "Delete from Diagram " from the popmenù.
How does he do? can someone help me?
Thanks

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Re: TO ACTIVATE "Delete from Diagram" ACTION [message #192320 is a reply to message #191393]

Thu, 12 June 2008 15:38

Youmm P.

Messages: 140
Registered: July 2009

Senior Member

Carmine2581 wrote:
> Hi to everybody, I am realizing an editor graphic with GMF and I
> would like to train the action of "Delete from Diagram " from the
> popmenù. How does he do? can someone help me? Thanks

If you look at the source of the DeleteFromDiagramAction, you can see
that "Delete From Diagram" is activated only if the parent of the
selected EditPart does not have a CANONICAL_ROLE policy installed.

For what I understand canonical policies are used to synchronize
semantic elements and the notation elements, so probably it doesn't make
so much sens to have a "Delete From Diagram" that won't delete the children:

"Canonical is the terminology we use to describe a container that keeps
its view of the semantic data synchronized with the semantic children."
in "Tutorial: Canonical Containers"

Regards.

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Re: TO ACTIVATE "Delete from Diagram" ACTION [message #192381 is a reply to message #192320]

Fri, 13 June 2008 09:38

Carmine

Messages: 8
Registered: July 2009

Junior Member

Thanks for your intervention!
To me it serves the "Delete from Diagram" because I have realized an
action of copy not in depth of a semantic element, therefore the element
copies that is not semantic it has to have the possibility to be
cancelled.

If even in this case it is not possible to activate the "Delete From
Diagram", can you advise me on as to implement a separate class that
allows me to cancel only the non semantic elements?

Thanks of everything!!

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