Question

I want to redraw an OpenLayers vector.

my html button:

<button id="refresh" type="button">Refresh</button>

and my jquery functions to redraw the layer, the parksLayer in the refresh function is logging as false:

function refresh() {
    parksLayer.redraw(true);
}

function bind(){
    $("#refresh").bind("click", refresh);
}

and my map, I want to redraw the ParksLayer:

        map = new OpenLayers.Map({
            div: "map",
            layers: [
                new OpenLayers.Layer.OSM(),
                parksLayer
            ]
        });

UPDATE

Thanks for the help, my vector layer is defined like this:

function changeme(avalue){
        parksLayer = new OpenLayers.Layer.Vector("Parks", {
            projection: new OpenLayers.Projection("EPSG:4326"),
            strategies: [new OpenLayers.Strategy.Fixed()],
            protocol: new OpenLayers.Protocol.Script({
                url: "http://my.cartodb.com/api/v2/sql",
                params: {
        q: "SELECT * FROM activities where type_code is not null"+" "+avalue,
        format: "geojson"
    },
                format: new OpenLayers.Format.GeoJSON({
                    ignoreExtraDims: true
                }),
                callbackKey: "callback"
            }),
        });  
    }

I have a form that changes avalue dynamically which changes the GeoJSON query, so if I could redraw the parksLayer I would be left with a new selection from the layer.

Answer 1

If I read the Openlayers API, redraw function does not use any parameters… You should try to call redraw() without putting “true” as a parameter…

Openlayers API:
redraw: function()
Redraws the layer. Returns true if the layer was redrawn, false if not.

Regards

Etienne