Hi,
I had the same issue, but as an added complication the number of classes
could change dynamically based on users adding and editing data.
I solved this by intercepting any web requests to this particular layer
and using MapScript to build the classes on-the-fly, then passing the
Layer object to generate the image.
for c in classes:
clsObj = mapscript.fromstring(c)
layer.classes.append(clsObj)
...
req = mapscript.OWSRequest()
req.loadParamsFromURL(querystring)
try:
dispatch_status = mymap.OWSDispatch(req)
#strip all the headers from the output as we add these through
wsgi server
content_type = mapscript.msIO_stripStdoutBufferContentType()
mapscript.msIO_stripStdoutBufferContentHeaders()
resp = mapscript.msIO_getStdoutBufferBytes()
except Exception as ex:
logging.error(ex)
logging.error(querystring)
resp, content_type = str(ex), "text/plain"
return resp, content_type
If you have static, or rarely changing data, then it would be simpler to
just use a script to build the classes once and save them as an INCLUDE
to your MAP file. Python and Jinja2 (a templating library for Python)
are handy for this.
Seth
On 30/03/2016 19:00, Lime, Steve D (MNIT) wrote:
Won't work. Bobb is trying to use feature-level properties at the
legend/layer-level. Can't be done... Steve
________________________________________
From: mapserver-users [mapserver-users-boun...@lists.osgeo.org] on behalf of
steve.tout...@inspq.qc.ca [steve.tout...@inspq.qc.ca]
Sent: Wednesday, March 30, 2016 10:32 AM
To: Basques, Bob (CI-StPaul)
Cc: mapserver-users@lists.osgeo.org; mapserver-users
Subject: [mapserver-users] RE Mapfile, EXPRESSION for CLASS >> NAME
Perhaps you can use CLASS TITLE instead of NAME
"Basques, Bob (CI-StPaul)" <bob.basq...@ci.stpaul.mn.us>@lists.osgeo.org
Envoyé par : "mapserver-users" <mapserver-users-boun...@lists.osgeo.org>
2016-03-25 16:44
A
"mapserver-users@lists.osgeo.org" <mapserver-users@lists.osgeo.org>
cc
Objet
[mapserver-users] Mapfile, EXPRESSION for CLASS >> NAME
All,
I think I’m trying to be too clever . . .
I have this MAPFILE chunk:
CLASS
COLOR 0 255 0
OUTLINECOLOR 0 0 0
SIZE 10
SYMBOL 'circle'
NAME '[FOLDERTYPE]'
TEXT '[FOLDERTYPE]'
LABEL
FORCE TRUE
COLOR 255 255 0
OUTLINECOLOR 0 0 0
POSITION ur
TYPE TRUETYPE
FONT 'arial-bold'
SIZE 11
END
END
and I’m trying to use an Expression for the Label in the Legend graphic. The
FOLDERTYPE and is the two later code for map labels, while the FOLDERDESC is
the long pretty name for the Legend.
Question, is it possible?? Ideas?? Before you say a separate class for each
one, there are 120 FOLDERTYPEs in all, that would be a big, and hard to
maintain Mapfile.
thanks
bobb
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