Paul, Thanks for the reply. That worked fine but my frustration with some of this is that the API (http://dev.openlayers.org/releases/OpenLayers-2.5/doc/apidocs/files/OpenLayers/Map-js.html) does not list a "layers" property for the map object. How is someone suppose to know that it is available to use?
Thanks for your insight - Peter -----Original Message----- >From: Paul Spencer <[EMAIL PROTECTED]> >Sent: Apr 7, 2008 9:39 PM >To: plen <[EMAIL PROTECTED]> >Cc: [email protected] >Subject: Re: [OpenLayers-Users] How to obtain reference to map layer in 2.5???? > >I would imagine that you can use something like: > >for (var i=0; i<map.layers.length; i++) { > var layer = map.layers[i]; > //do something with the layer? >} > >Cheers > >Paul > >PS Firebug is a great extension for firefox that allows you to inspect >live javascript objects like the map object and find what you need. > >On 7-Apr-08, at 9:28 PM, plen wrote: >> >> Hello, >> >> I am using OpenLayers 2.5. Our situation is that we are getting a >> handle to >> the map after someone else has loaded some WMS map layers. So, by >> the time >> I can do anything with the OpenLayers map, another group has added >> 10 or 11 >> map layers through calls like: >> >> var ol_wms = new OpenLayers.Layer.WMS( "OpenLayers WMS", >> "http://labs.metacarta.com/wms/vmap0?";, {layers: >> 'basic'}, >> options); >> >> I want to get a handle to a particular layer and I think I have to >> use the >> OpenLayers API to get the layer. For example, the 2.5 API has a >> map.getLayer([layer_id]); and then a >> map.setBaseLayer(OpenLayers.Layer); >> >> My question is that you have to have the layer ID as the argument >> for the >> getLayer() function. Since I did not load any of those layers, I >> don't know >> how I would get the ID for the layer I am interested in. There is no >> generic function which returns an array of all the layers to which I >> could >> just cycle through and check each layers name, for example. Version >> 2.6 has >> more functions to obtain layer data but we must use 2.5 for the time >> being. >> >> Any thoughts how I can programmatically go through the layers? >> >> Thanks - Peter >> >> -- >> View this message in context: >> http://www.nabble.com/How-to-obtain-reference-to-map-layer-in-2.5-----tp16545652p16545652.html >> Sent from the OpenLayers Users mailing list archive at Nabble.com. >> >> _______________________________________________ >> Users mailing list >> [email protected] >> http://openlayers.org/mailman/listinfo/users > _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
