[OpenLayers-Users] Change vector style dynamically

[Maxime Phaneuf]

Hi,

I'm developping a map where the baselayer is Google and the overlay layers
are GeoJSON I build server side.

    var busRoutes = new OpenLayers.Layer.Vector("routes", {
        visibility: true,
        style: styleLine,
        strategies: [new OpenLayers.Strategy.Fixed()],
        protocol: new OpenLayers.Protocol.HTTP({
            url: GlobalParams.MakeUrl("mapHandler.ashx"),
            format: new OpenLayers.Format.GeoJSON(),
            params: { 'routes': 'all', 'action':'route' }
        })
    });

This works as expected. I can see my layer no problem, with the style being:

    var styleLine = new OpenLayers.Style({ 'strokeColor': '#000000'});
    var styleLineSelect = new OpenLayers.Style({ 'strokeColor': '#FF0505'
});
    var styleLineTemp = new OpenLayers.Style({'strokeColor':'#ffffff'});
    var smLine = new
OpenLayers.StyleMap({'default':styleLine,'select':styleLineSelect,
'temporary':styleLineTemp});

This busRoute layer shows every bus routes. Sometimes, a user will only need
to see one route instead of all. So, I built a custom layer changer where
I'm refreshing this layer with this code:

map.getLayersByName('routes')[0].refresh({ force: true, params: { 'routes':
routeNumberJSON, 'action':'route'} });

This also works as expected. I can see the specific route on the map.

The problem is that I cannot change the style (stroke color)  for this
particular route. I tried setting a new style and stylemap for the layer,
and a new style for the new features. Nothing seems to work. It always keeps
the #000000 (black) stroke color. I really need to be able to change style
dynamically when I refresh the layer. I know my new style and style are
valid.

Is it possible to change style dynamically in OpenLayers?

Thanks,
Maxime

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