[OpenLayers-Users] Layer selection in LayerSwitcher

[Semantica]

Sorry, in my last post I forgot to indicate how to access the selected layer. 
As you will see I added a property on the layerSwitcher called activeLayer. 
This property stores the layer id (layer.params.LAYERS).  

To make a layer active, the user clicks on the layer title in the
layerSwitcher.  The title bar is highlighed with a border and the
activeLayer property is set the the layer id.  So to access the layer
associated with that id (i.e. the active layer) you simply do this:

var layerId = layerSwitcher.activeLayer;
var activeLayer = map.getLayer(layerId);

Then you can access the layer properties for example if you wan't the
getFeatureInfo request string you would do the following:

var url =   activeLayer.getFullRequestString({
                                REQUEST: "GetFeatureInfo",
                                EXCEPTIONS: "application/vnd.ogc.se_xml",
                                BBOX: activeLayer.map.getExtent().toBBOX(),
                                X: evt.xy.x,
                                Y: evt.xy.y,
                                INFO_FORMAT: 'text/html',
                                QUERY_LAYERS: activeLayer.params.LAYERS,
                                WIDTH: activeLayer.map.size.w,
                                HEIGHT: activeLayer.map.size.h});

Again, I hope this helps.  

Cheers and good luck!


Bas Couwenberg wrote:
> 
> Hello,
> 
> is it possbile with the LayerSwitcher control to select a layer (I don't
> mean turn invisible) which I then could use to change it opacity. The
> opacity part works well from the examples but I want to do this per layer
> I
> select.
> 
> Best regards,
> 
> Bas Couwenberg
> 
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> http://openlayers.org/mailman/listinfo/users
> 
> 

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