[OpenLayers-Users] Highlighting Selected Tract

Sun Mar 3 16:21:36 PST 2013

I am trying to highlight the selected tract in a WMS layer using a
getfeatureinfo event.  I have seen many examples searching this topic, but I
can't get it to work.  The popup works fine, and I don't get any errors in
Firebug.  The code that I am using is below:

                                var highlightLayer = new
OpenLayers.Layer.Vector("Highlighted Features", {

                                                styleMap: myStyles,

                                                displayInLayerSwitcher:
false,

                                                isBaseLayer: false

                                                }

                                );

                                var popup = null;

                                var selectControl = new
OpenLayers.Control.WMSGetFeatureInfo({

                                                                url:
'myurl',

                                                                title:
'Identify features by clicking',

                                                                layers:
[mylayer],

queryVisible: true,

                                                                hover:
false,

eventListeners: {

getfeatureinfo: function(event) {

                                                                if
(!event.text.match(/<body>\s*<\/body>/)){

if (popup)

{

popup.destroy();

popup = null;

}

popup = new OpenLayers.Popup.FramedCloud(

"popup",

map.getLonLatFromPixel(event.xy),

null,

event.text,

null,

true

);

map.addPopup(popup);

                                                                }

                                                                }

                                                }

});

map.addLayers([mylayers, highlightLayer]);

selectControl.events.register("getfeatureinfo", this, showInfo);

map.addControl(selectControl);

selectControl.activate();

map.zoomToMaxExtent();

}

                                function showInfo(evt) {

                                                if (evt.features &&
evt.features.length) {

highlightLayer.destroyFeatures();

highlightLayer.addFeatures(evt.features);

                                                    highlightLayer.redraw();

                                                }

                                }

If someone can tell me what I am doing wrong, I would really appreciate it.

Thanks,

Jerome A. Wendell

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