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feature layer zoom in

abukhan

how to zoom in the results from the feature layer query?

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DasaPaddock

About the utility function :

GraphicUtil.getGeometries

It extracts array of geometries from array of graphics

Is there any way to get features that are outside and touching these geometries?
I mean if there are 20 geometries (of graphics), I want to get features that are outside the 20 geometries touching them...

You may be able to do this using a geoprocessing task:
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/tasks/Geoprocessor.html

DasaPaddock

One way I solved this issue using an boolean variable that I set initially and the updateend checks for this boolean variable (only does zooming in the first time)..

Another option may be to remove the updateEnd listener.

abukhan

About the utility function :

GraphicUtil.getGeometries

It extracts array of geometries from array of graphics

Is there any way to get features that are outside and touching these geometries?
I mean if there are 20 geometries (of graphics), I want to get features that are outside the 20 geometries touching them...

abukhan

One way I solved this issue using an boolean variable that I set initially and the updateend checks for this boolean variable (only does zooming in the first time)..

abukhan

One issue with updateEnd that it even happens when panning or zooming (the feature layer gets updates with zooming and panning).

Is there any event that I can use when feature layer first time gets queried using definitionexpression.
( i would like to zoomin to the return features at the initial time)...

So what is happening now If I put my code(for zooming in the return features) in the updateEnd event, any time user pans , it comes to the previous zooming....

DasaPaddock

QUERY_FEATURES_COMPLETE is for when you call the queryFeatures() method:
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/FeatureLayer.html#queryFeatures()

Listen for updateEnd if you want to know when the FeatureLayer has finished loading new features and made them available in it's graphicProvider.
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/Layer.html#event:updateEnd

ReneRubalcava

Looking at the docs
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/FeatureLayer.html

The returned event is QUERY_FEATURES_COMPLETE.
com.esri.ags.events.FeatureLayerEvent.QUERY_FEATURES_COMPLETE
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/FeatureLayer.html#event:queryFeaturesComplete

I have not used queryFeatures in my apps yet, so I'm not sure if results will be displayed as graphics on screen, but the QUERY_FEATURES_COMPLETE event returns a FeatureSet.
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/events/FeatureLayerEvent.html

abukhan

Which event in feature layer that fires at the end of query results? I mean in which event (in feature layer) fires when all the features are returned to the client from the server?

ReneRubalcava

A FeatureLayer is a subclass of a GraphcisLayer, so you can use GraphicUtil.getGraphicsExtent to do it, after you have done a selection on the FeatureLayer.

var ac:ArrayCollection = featureLayer.graphicProvider as ArrayCollection;
map.extent = GraphicUtil.getGraphicsExtent(ac.toArray());

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