[OpenLayers-Users] change WMS parameter on refresh

[Eric Lemoine]

On Friday, June 1, 2012, Charles Galpin wrote:

> This is probably really simple but I'm drawing a blank.
>
> I have a OpenLayers.Layer.WMS layer that I want to change a parameter each
> time it refreshes (on initial load, zoom, explicit refresh, whenever). In
> case you are curious ultimately I want to pass the map scale as part of  a
> parameter called "viewparams" which allows one to pass parameters to
> geoserver sql views. I can send a static value just fine from the value
> provided for params during construction, but need to make it dynamic.
>
> So perhaps there is a pre-load event handler I can add to do the
> equivalent of mergeNewParams say? Thoughts?
>
> Thanks,



You can create a Layer.WMS subclass and overload getURL or
getFullRequestString. Look at the OL code.


-- 
Eric Lemoine

Camptocamp France SAS
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Tel : 00 33 4 79 44 44 96
Mail : eric.lemoine at camptocamp.com
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