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Node Container [message #707982]

Tue, 02 August 2011 05:54

Eclipse User

Hey all,

is there a possible solution to add nodes in a figure (e.g. in a rectangle)?

Or in other words: Can I create Nodes without underlying domain Elements in which other nodes can be added like compartments?

Problem: The containing figure is NOT a representation for a domain element.

I'll be thankful for any help...

regards

[Updated on: Tue, 02 August 2011 16:19] by Moderator

Re: Node Container [message #709230 is a reply to message #707982]

Wed, 03 August 2011 13:02

Eclipse User

Is there really no solution to this problem?
Can't believe it's that difficult.

I'm not very skilled in GUI programming but maybe there is a way to add a content pane and add the nodes into it. But I really didn't know how exactly.

Or can this problem being solved directly in the mapping model? That would be the nicer approach, because I need a creation tool for the container.

If someone have a (hopefully simple) solution, please post...

Thanks in advance

Re: Node Container [message #709234 is a reply to message #709230]

Wed, 03 August 2011 13:06

Eclipse User

IMHO, your rectangle IS a domain element, it is not only a decoration.
You should think about refactoring your domain model. Containment is a
structural relationship, it is difficult to render in GMF if it is not
part of your domain.

HTH

--
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Re: Node Container [message #709275 is a reply to message #709234]

Wed, 03 August 2011 14:16

Eclipse User

Hello Mickael,

thanks a lot for your reply.

Your suggested solution would solve the problem.
Unfortunately I want to use the solution as well for other elements.
So if I'd do it that way the complexity of the underlying domain model will rise up unnecessarily.

Maybe it makes my point a way clearer if i post the actual structure of the affected elements:

Consider the elements A and B.
There is a multiple containment-relation between A and B thus A hold several B's.

To apply your solution I have to add an element C (container) which serves as the container. So I got the following structure:

A contains one C & C contains multiple B's.

This produces a lot of overhead which did not actual reflect the underlying (and desired) domain-structure.

At the end I have to do it that way but im still hoping that there exist another approach which fits the underlying structure. I really need it for decorative purposes only.

[Updated on: Wed, 03 August 2011 14:18] by Moderator

Re: Node Container [message #709732 is a reply to message #709275]

Thu, 04 August 2011 04:34

Eclipse User

I'm not sure i understood everythings but in your case, A contains some B, so in your gmfgraph, this is what you're supposed to have :
a FigureA
a NodeA which the figure attribute is set to FigureA
a CompartmentForBs which the figure attribute is also set to FigureA
and a Figure for B and it's node.

In that case, the same graphical element will be used to represend A and hold Bs, and there is no need for a C class

Re: Node Container [message #710279 is a reply to message #709732]

Thu, 04 August 2011 17:53

Eclipse User

Thanks for replying.

There is no need to build a graphical representation for element A.
I have a subdiagram which represents A.
In this subdiagram I only want to have Nodes of element B which should be drawn in an aligned manner...

To repeat the issue: The graphical container is not a domain element.

[Updated on: Thu, 04 August 2011 17:55] by Moderator

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