[OpenLayers-Users] GetFeatureInfo and overlays

[James McManus]

Eric,

Thanks!
Eric Lemoine wrote:
> Hi James
>
> On Fri, Jun 6, 2008 at 6:27 PM, James McManus <jmpmcmanus at yahoo.com> wrote:
>   
>> Is there a standard way to enable GetFeatureInfo to only query from the
>> current overlay being displayed?  QUERY_LAYERS enables you to query more
>> than one layer, but if FEATURE_COUNT is set to 1 then the info from the
>> last layer on the list is displayed. You can set FEATURE_COUNT to a
>> higher number, but I do not want to do that. Is there a standard way of
>> linking LayerSwitcher with GetFeatureInfo?
>>     
>
> You can have your "click on map" handler get the list of visible
> overlays and use that list in the GetFeatureInfo request, with
> something like the following:
>
> var QUERY_LAYERS=[];
> for (var i = 0; i < map.layers.length; i++) {
>     var layer  = map.layers[i];
>     if (!layer.isBaseLayer && layer.getVisibility()) {
>         QUERY_LAYERS.push(layer.name);
>     }
> }
>
> Would that work for you?
>
> Cheers,
> --
> Eric
>
>