On 04/24/2015 02:19 AM, Andrea Aime wrote:
On Thu, Apr 23, 2015 at 10:29 PM, Jim Hughes <[email protected]
<mailto:[email protected]>> wrote:
Hi Andrea,
First, the CSS extension is awesome; thank you for your hard work
on it. I have a few quick questions...
1. I am trying to style GDELT data by EventCode. The first two
characters of the EventCode string would be sufficient to name the
file I want. I was able to make a separate rule for each code,
but it'd be more convenient to do something like
mark: url([strConcat(strSubstring(EventCode, 0, 2), '.svg')]);
If I'm reading this
https://github.com/geotools/geotools/blob/master/modules/unsupported/css/src/main/java/org/geotools/styling/css/CssParser.java#L321
right, it looks like Functions may not work. The docs hint that
Expressions might be ok:
http://docs.geoserver.org/stable/en/user/extensions/css/properties.html.
Did I goof the syntax? If not, I'd be happy to help cook up a
quick PR if expresssions/functions in url should be allowed.
You should check the generated SLD, that's the important one.
Also, which version of GeoServer you're using? 2.7 onwards is very
much recommended for CSS, I cannot help with 2.6 and older.
The generated SLD doesn't update. There is an error reported in the UI:
"Cannot turn this value into a literal: Expression
[expression=strConcat([strSubstring([EventCode], [0], [2])], [.svg])]"
I'm trying this out on GeoServer 2.8-SNAPSHOT.
2. How does the CSS extension interact with GeoServer's SLD
extensions?
It's a translator to SLD, GeoServer and the rendering subsytem really
only handle the latter.
If you are about to ask about working off the CSS directly, It's been
discussed already, having the renderer work directly off the CSS would
require major API changes, and a heavy refactor
or the renderer itself (we'd end up with two renderers to maintain).
I suppose I'm asking how new GeoServer SLD extensions will be added to
the CSS extension. It makes sense that the CSS module may lag behind.
Thanks,
Jim
3. In the CSS Styles GeoServer UI, I think it'd be awesome to
keep the same map extent as one switches between the tabs. If you
like the idea, I might be able to play with it over the next few
weeks.
Sure
Cheers
Andrea
--
==
GeoServer Professional Services from the experts! Visit
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==
Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
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Italy
phone: +39 0584 962313
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