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Double line Polyline for Connections [message #1385210]

Wed, 04 June 2014 22:01

Eclipse User

Hi all,

Is there any way to create a Connection whose GA is two parallel Polylines, similar to the ones shown here:

http://content.screencast.com/users/rbrodt/folders/Jing/media/40de9621-4b8d-4554-9c43-ffde050b7da4/2014-06-04_1957.png

I've tried creating two Polylines, a wide one in black, and a narrow one in white on top of it, but that failed miserably.

Any suggestions would be welcomed!

Bob

Re: Double line Polyline for Connections [message #1385824 is a reply to message #1385210]

Wed, 11 June 2014 08:25

Eclipse User

Bob,

unfortunately, the line styles Graphiti supports are rather limited because
GEF's line style support does not offer more (besides custom, which means
building it yourself...).

For now I see only the possibility to draw 2 connection lines in parallel,
but I'm not sure if that will work...

A future alternative could be to build that into the Graphiti framework
itself, but that could be a lot of effort and I'm not sure when we will get
to that. Anyhow, please file an enhancement bug in case you would like that
feature.

Michael

Re: Double line Polyline for Connections [message #1391777 is a reply to message #1385824]

Tue, 01 July 2014 07:51

Eclipse User

Hi Michael, and thanks for your reply.

As I mentioned in my original post, I tried drawing two lines on top of each other - an 8 pixel line in black and a 4 pixel line in white. This should result in the desired result, but it looks like Graphiti is not designed to support child GAs for Connections. How difficult would it be to add this functionality?

Thanks,
Bob

Re: Double line Polyline for Connections [message #1393248 is a reply to message #1391777]

Thu, 03 July 2014 09:38

Eclipse User

Hi Bob,

Graphiti does not offer this at the API, but it should be possible to add a
new connection type (or enhance the freeform connection to allow that)
relatively straight forward on GEF level.

Without looking into the details, I'd guess for someone with some GEF
knowledge it should not be a big matter. Supporting bendpoints correctly
might be somewhat more tricky and doing correct interpolation/rounding also.
It's hard to nail down to concrete effort numbers...

Michael

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