OpenLayers：GetFeature WFS请求在鼠标输入之前不会触发featureselected事件

Question

I have setup a GetFeature control with a WFS protocol which works fine with a mouse click after the control has been added and activated.

selectControl.events.register("featureselected", this, function (e) { 
vectorLayer.addFeatures([e.feature]); 
}); 
selectControl.events.register("featureunselected", this, function (e) { 
    vectorLayer.removeFeatures([e.feature]); 
}); 
map.addControl(selectControl); 
selectControl.activate(); 

I want to automatically request the control from a newly created point location like so:

map.controls[5].request(new OpenLayers.Bounds([lonLat.lon, lonLat.lat, lonLat.lon, lonLat.lat]), { single: true });

This works but only after I have triggered the request at least once with mouse input. Prior to the manual request the automatic request will not trigger the featureselected event.

Once I have triggered the event with a mouse click I can use the control request method with bounds input.

Any input is more than welcome since I already put way to much time into this.

Thanks, Dennis

Answer 1

I found the issue myself. I am not sure whether this is a bug in the OpenLayers script.

The modifiers property of the GetFeature control is null when I request the control like this:

.request(new OpenLayers.Bounds([lonLat.lon, lonLat.lat, lonLat.lon, lonLat.lat]), { single: true });

and not by clicking into the map object.

Once I called the control by clicking in the map the modifiers property is set to {multiple:null,toggle:null}.

If I declare the modifiers property on the control like this:

.modifiers = {multiple:null,toggle:null}

I can run the .request without clicking in the map.

Is this an oversight by me? The OL documentation does not state that the modifiers should be declared manually. However, no default values are given in the documentation page.

Dennis