[GIS] How to make the Overlays section in an OpenLayers2 LayerSwitcher exclusive

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At the simplest level I need to figure out how to create a customized OpenLayers LayerSwitcher Overlays section which is not using Checkboxes, but uses RadioButtons instead.

For my application its not desirable for the user to be able to select multiple layers. Eventually I'm going to need to be able to create group sections in the Overlay section of the LayerSwitcher, so if anyone has any hints on that I'd appreciate it.

I've seen the customized LayerSwitcher example on the OpenLayers site, but I can only get it to work in Chrome. I need to be able to support Safari on an iPad.

Best Answer

Does this example do what you want? Or are there specific customizations you need on the layer control?

http://openlayers.org/dev/examples/google.html

Seems to work on Safari on a pc - though not tried it on an iPad.

Update Per OpenLayers question in comment:

It really depends on how you want to serve out your data which depends on what kind and how much data you have.

If the data is vector data and not more than +-300 features you can use WFS. Add that layer like so: OpenLayers GeoServer WFS Layer Example

If the data is Raster data or you just want your layer served out as an image rather than vector features, then add that layer using WMS. Like so: OpenLayers WMS Layer Example

Update #2:

Based on your latest comment, what you can do is: add multiple wfs layers to your open layers map which point to ONE layer on your GeoServer but have a filter defined so you only get ONE feature back based on ID or some other attribute in your filter.

Take a look at this example.

Basically it will be something like:

var wfs = new OpenLayers.Layer.Vector("WFS", {
    strategies: [new OpenLayers.Strategy.BBOX()],
    protocol: new OpenLayers.Protocol.WFS({
        url: "http://demo.opengeo.org/geoserver/wfs",
        featureType: "tasmania_roads",
        featureNS: "http://www.openplans.org/topp"
    }),
    filter: new OpenLayers.Filter.Logical({
        type: OpenLayers.Filter.Logical.And,
        filters: [
            new OpenLayers.Filter.Comparison({
                type: OpenLayers.Filter.Comparison.EQUAL_TO,
                property: "id",
                value: "POLYGONID"
            })
        ]
    })
});

Best Answer

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Update Per OpenLayers question in comment:

Update #2:

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