topic Re: Basic FeatureLayer question in ArcGIS API for Flex Questions

Basic FeatureLayer question

KennMurphy — Mon, 21 Mar 2011 21:31:18 GMT

I am trying to use a FeatureLayer to search for meters in our service territory. The searching works great, but I can't seem to get it to change the view so that all the returned features are in view. I was attempting to do it as follows, but it isn't working. The meters are in a layer that is visible only at a certain zoom level and I made sure to be zoomed in to the appropriate level before conducting the search.

private function updateEndFunction(event:Event):void
{
    var graphicsExtent:Extent = GraphicUtil.getGraphicsExtent(fLayer.selectedFeatures);
    OutageMap.extent = graphicsExtent;
}

Re: Basic FeatureLayer question

DasaPaddock — Mon, 21 Mar 2011 22:58:19 GMT

Is it going to the right area, but just too far zoomed in?

Re: Basic FeatureLayer question

KennMurphy — Mon, 21 Mar 2011 22:59:39 GMT

It doesn't move at all. I can search for different meters and the marks will change, but the view never changes.

Re: Basic FeatureLayer question

DasaPaddock — Wed, 23 Mar 2011 01:43:57 GMT

When is your updateEndFunction() being called? Are you calling selectFeatures() on your FeatureLayer?

Re: Basic FeatureLayer question

KennMurphy — Wed, 23 Mar 2011 15:16:16 GMT

I set it in the FeatureLayer definition so I'm thinking it gets called after the Features get marked.

(i.e.):

<esri:FeatureLayer id="fLayer" visible="true" mode="snapshot" symbol="{MeterMark}" outFields="MeterNumber" updateEnd="zoomToExtent(event)" url="http://vmvea-arcgis:8399/arcgis/rest/services/Dispatch_Map/MapServer/0"/>

I wasn't calling selectFeatures, but I have changed my code to call the selectFeatures function to select all the features present in the layer, but the extent still doesn't change. Do i need to refresh the map or something to get it to move the view?

Re: Basic FeatureLayer question

KennMurphy — Wed, 23 Mar 2011 16:40:04 GMT

I've decided to change tactics. I'm using a QueryTask with a GraphicsLayer instead of a FeatureLayer. I took the source code from the Zoom to query result example and it works great for selecting meters. It doesn't change the extent when there is only one meter selected, but since this is going to be an outage map I don't think it's an issue (at least not yet).

Thanks for all the help! 🙂