[OpenLayers-Users] Where Do I Find A List of Available Hashtable Options?

[Christopher Schmidt]

On Fri, Jan 02, 2009 at 08:04:23AM -0700, Bill Thoen wrote:
> Thanks for the info, Christopher.
> 
> However, the syntax  you list  for overriding the MapServer  map file 
> parameter doesn't work. If you (or anyone else)  knows how I can 
> override the layer color to yellow (255 255 0) in OpenLayers from a map 
> file that looks like the following, I'd appreciate knowing what the 
> trick is.

This is really a question for the MapServer list, which is why I said:

  "you simply need to figure out the right parameter to send to MapServer"

I'm not a MapServer user, but the documentation seems to be quite clear:

 http://mapserver.osgeo.org/cgi/controls.html#changing-map-file-parameters-via-a-form-or-a-url

-- Chris

>    LAYER
>       NAME "states"
>       TYPE POLYGON
>       DATA states
>       CLASS
>          NAME "US States"
>          STYLE
>             OUTLINECOLOR 100 100 100
>             COLOR 255 255 192
>          END
>       END
>       PROJECTION
>          "init=epsg:32614" # UTM Zone 14 N WGS84
>       END
>       STATUS DEFAULT
>    END
> 
> 
> 
> Christopher Schmidt wrote:
> > On Thu, Jan 01, 2009 at 04:08:24PM -0700, Bill Thoen wrote:
> >   
> >> In several places in the OpenLayers Constructor functions there is a 
> >> parameter that is an object consisting of a "Hashtable of extra 
> >> options...", but I can't find a list of what those choices might be. For 
> >> example, the fourth parameter for OpenLayers. Layer. MapServer() is such 
> >> an object. What are the available tags that can be used here and where 
> >> do I find out what these are? Are they the parameters from a map file, 
> >> like LAYER.CLASS.STYLE.COLOR: "255 255 0" or something like that?
> >>     
> >
> > Options override the 'properties' of the layer: anything that is listed
> > as a property of the Layer in the API documentation can be overridden
> > via the options hash.
> >
> > What you want is another parameter (the third param): something like
> > {'layers': 'a, b', 'layers[a].class.style.color': 'red'}. The third
> > parameter is serialized and sent directly to the server with *no*
> > intervention on the part of OpenLayers (except in WMS, where keys are
> > uppercased); this means that you simply need to figure out the right
> > parameter to send to MapServer and include it as a key/value pair in the
> > parameters hash.
> >
> > Regards,
> >   
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-- 
Christopher Schmidt
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