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Reverse the link direction of a reference based link [message #212404]

Fri, 28 November 2008 11:35

Eclipse User

Hello,

i follow the approach described in the post: 'How to generate a link
with multiple sources and targets'. The 'from' and 'to' links are
reference-based LinkMappings.

I would like to know how i can reverse the link direction of the 'from'
link. In general we need a left to right direction for all links.

Joerg

Re: Reverse the link direction of a reference based link [message #212501 is a reply to message #212404]

Mon, 01 December 2008 02:22

Eclipse User

Problem solved. The solution was found in the GMF genmodel. Under 'Gen
Editor/Gen Diagram/Gen Link ???EditPart' exists two properties,
'Incomming Creation Allowed' and 'Outgoing Creation Allowed', who
control the behavior i want.

Joerg

Re: Reverse the link direction of a reference based link [message #212524 is a reply to message #212404]

Mon, 01 December 2008 04:54

Eclipse User

Hello joerg,

There are three properties of GenLink in .gmfgen model:
- incomingCreationAllowed
- outgoingCreationAllowed
- viewDirectionAlignedWithModel

Additional command "reverting" the link will be generated if you specify
incomingCreationAllowed = true, outgoingCreationAllowed = false, viewDirectionAlignedWithModel
= true.

So you can try this and use generated code as an example of changing the
visual link direction on a creation time.

-----------------
Alex Shatalin

Re: Reverse the link direction of a reference based link [message #212641 is a reply to message #212524]

Wed, 03 December 2008 08:54

Eclipse User

Hello Alex,

thanks for your reply. On creation time it works. But when i save, close
and re-open the editor the 'from link' shows from the 'link center' node
towards nowhere. This is caused, since the 'from link' EditPart was
added to the 'link center' EditPart as a 'source connection' instead of
a 'target connection'.

Can i change this behaviour? Maybe by change the ??diagramUpdater class
or exists better places for make any necessary adjustments.

Thanks
Joerg

Re: Reverse the link direction of a reference based link [message #212649 is a reply to message #212641]

Wed, 03 December 2008 11:15

Eclipse User

Hello joerg,

It looks like a probelem of diagram update logic working in viewDirectionAlignedWithModel
= false conditions... Yes, you can modify ??diagramUpdater to handle this
situation properly.
BTW, if you just need to create link from node1 to node2, but show it with
an arrow pointing to node1 then you can use source decoration instead of
target in .gfmgen model and visually link will point to node1 (staying alighed
with model link in notation model..)

-----------------
Alex Shatalin

Re: Reverse the link direction of a reference based link [message #212788 is a reply to message #212649]

Thu, 04 December 2008 08:27

Eclipse User

Hello Alex,

thanks for your reply. Modify the ??DiagramUpdater was the
straight tip. I got the desired behaviour.

Thanks
Joerg

Re: Reverse the link direction of a reference based link [message #212803 is a reply to message #212788]

Thu, 04 December 2008 08:40

Eclipse User

Hello joerg,

Can you please file a bugzilla issue describing this situation then?

-----------------
Alex Shatalin

Re: Reverse the link direction of a reference based link [message #212847 is a reply to message #212803]

Fri, 05 December 2008 05:19

Eclipse User

Hello Alex,

> Can you please file a bugzilla issue describing this situation then?

Sure.

https://bugs.eclipse.org/bugs/show_bug.cgi?id=257688

Thanks for your help
Joerg

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