Unable to select Vector Layer

Question

I am using the following example, to select a vector layer feature on click. The example demonstrates Highlighting and selecting the layer. I was able to successfully implement the Highlighting of the layer but I am not able to select the layer.

This is my code

var highlightCtrl = new OpenLayers.Control.SelectFeature([vector_layer,QuebecSpecies], {
                hover: true,
                highlightOnly: true,
                renderIntent: "temporary",
                eventListeners: {
                    beforefeaturehighlighted: report,
                    featurehighlighted: report,
                    featureunhighlighted: report
                }
            });

            var selectCtrl = new OpenLayers.Control.SelectFeature([vector_layer],
                {clickout: true}
            );

map.addControl(highlightCtrl);
map.addControl(selectCtrl);

highlightCtrl.activate();
selectCtrl.activate();

Where am I falling short?

Answer 1

Please try this i hope this will help you. DEMO

This demo will display a point on a map and highlight it on mouse over and selecting point on click will display a popup, and removes the popup on unselect

Here is the code for function :

function init() {
        var Geographic = new OpenLayers.Projection("EPSG:4326");
        var Mercator = new OpenLayers.Projection("EPSG:900913");

        var map = new OpenLayers.Map({
            div: "map",
            center: new OpenLayers.LonLat(0, 0),
            minResolution: "auto",
            minExtent: new OpenLayers.Bounds(-1, -1, 1, 1),
            maxResolution: "auto",
            maxExtent: new OpenLayers.Bounds(-180, -90, 180, 90),
            projection: Mercator,
            displayProjection: Geographic
        });

        var baselayer = new OpenLayers.Layer.OSM();
        map.addLayer(baselayer);
        map.addControl(new OpenLayers.Control.MousePosition());
        map.setCenter(new OpenLayers.LonLat(77.79, 22.77),4);
        // creates a point layer with a temporary style
        var pointLayer = new OpenLayers.Layer.Vector("Points", {
            styleMap: new OpenLayers.StyleMap({
                "temporary": new OpenLayers.Style({
                    strokeColor: '#7f0000',
                    fillColor: '#7f0000',
                    strokeOpacity: .8,
                    strokeWidth: 1,
                    fillOpacity: .3,
                    cursor: "default",
                    pointRadius: 6
                })
            })
        });
        // add a point to pointLayer
        var feature = new OpenLayers.Feature.Vector(new OpenLayers.Geometry.Point(77.79, 22.77));
        pointLayer.addFeatures(feature);
        // point layer events on featureselected adds a popup and removes it on featureunselected
        pointLayer.events.on({
            featureselected: function (e) {
                latitude = e.feature.geometry.x;
                longitude = e.feature.geometry.y;
                id = e.feature.id;
                popup = new OpenLayers.Popup(id,
                            new OpenLayers.LonLat(latitude, longitude),
                            new OpenLayers.Size(200, 20),
                            id, true);
                map.addPopup(popup);
            },
            featureunselected: function (e) {
                var id = e.feature.id;
                for (var i = 0; i < map.popups.length; i++) {
                    if (map.popups[i].id == id) {
                        var x = map.popups[i];
                        map.removePopup(x);
                        break;
                    }
                }
            }
        });
        map.addLayer(pointLayer);
        // highlightControl adds the temporary style on select
        var highlightControl = new OpenLayers.Control.SelectFeature(pointLayer, {
            hover: true,
            highlightOnly: true,
            renderIntent: "temporary"
        });
        // selectControl will select a particular feature
        var selectControl = new OpenLayers.Control.SelectFeature([pointLayer],
            { clickout: true }
        );

        map.addControl(highlightControl);
        highlightControl.activate();
        map.addControl(selectControl);
        selectControl.activate();
    }

Answer 2

You had to activate and add the control in right order, begin with the hover activate and add then the select event snippet.