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Exand tree nodes to liveMapwidget

RashaGarfinkel

I am trying to add the name of the features under each of the feature layer names - make the tree one level deeper & the features should be selected based on their map visibility - How do I get the features from the feature layer & add them as items to the tree?

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RashaGarfinkel

do you see the query (as a GET or POST) in firebug?

I must have had something wrong in the query but it seems to be working now - I get back the featureset for the layer - how do I add it as a child to the layer node on the tree - can it be called synchronously - since I want to be able to loop through each layer & query its features?

JeffPace1

I had tried queryTask - I am not even getting into the call back - not sure what is wrong with my query - here it is:
getFeatures: function(){
var queryTask = new esri.tasks.QueryTask(sublayeritem.url);
                                        var queryP = new esri.tasks.Query();
                                        queryP.returnGeometry = true;
                                        queryP.outFields = ["*"];
                                        queryP.outSpatialReference = this.map.spatialReference;
                                        queryTask.execute(queryP, dojo.hitch(this, "resultCallback"));

},

resultCallback: function(featureSet) {
}

do you see the query (as a GET or POST) in firebug?

RashaGarfinkel

Dynamic map service layers consist of single image created on the fly as requested by a client. If you want info about features, you have to make a request to the server. The easiest way to do this is with a queryTask.

I had tried queryTask - I am not even getting into the call back - not sure what is wrong with my query - here it is:
getFeatures: function(){
var queryTask = new esri.tasks.QueryTask(sublayeritem.url);
                                        var queryP = new esri.tasks.Query();
                                        queryP.returnGeometry = true;
                                        queryP.outFields = ["*"];
                                        queryP.outSpatialReference = this.map.spatialReference;
                                        queryTask.execute(queryP, dojo.hitch(this, "resultCallback"));

},

resultCallback: function(featureSet) {
}

JeffPace1

Are you using the JS Sample Viewer? It contains a livemapswidget

if so, the name (label) in the tree comes from the config.xml file

<livemaps>
<mapservice label="Community Redevelopment Areas" type="dynamic" visible="false" alpha="0.6">http://www.mymanatee.org/arcgis/rest/services/community-services/cra/MapServer</mapservice>

derekswingley1

Its saying that its a esri.layers.ArcGISDynamicMapServiceLayer - would you know how I can accesss its features

Dynamic map service layers consist of single image created on the fly as requested by a client. If you want info about features, you have to make a request to the server. The easiest way to do this is with a queryTask.

RashaGarfinkel

Check the layer's declaredClass property. If it's esri.layers.GraphicsLayer or esri.layers.FeatureLayer then you can access the layer's features via layer.graphics.

Its saying that its a esri.layers.ArcGISDynamicMapServiceLayer - would you know how I can accesss its features

derekswingley1

I was using that widget thinking that it is known since I am new to this - its a UI tree that displays maplayers & feature layers based on their visibility on the map
so to rephrase my question if I have code to get the layers from the map:
for(var i = this.map.layerIds.length - 1; i >= 0; i--){
var layerId = this.map.layerIds;
var layer = this.map.getLayer(layerId);
}
how would I get the inidividual features of the given layer?

Check the layer's declaredClass property. If it's esri.layers.GraphicsLayer or esri.layers.FeatureLayer then you can access the layer's features via layer.graphics.

RashaGarfinkel

I should have been more specific...we don't have anything in the API called a "liveMapWidget". Where did the liveMapWidget come from? Who wrote it? You're best bet is to reach out to the developer of the widget.

I was using that widget thinking that it is known since I am new to this - its a UI tree that displays maplayers & feature layers based on their visibility on the map
so to rephrase my question if I have code to get the layers from the map:
for(var i = this.map.layerIds.length - 1; i >= 0; i--){
var layerId = this.map.layerIds;
var layer = this.map.getLayer(layerId);
}
how would I get the inidividual features of the given layer?

derekswingley1

It's one of the widgets that displays a tree like structure of layer name & feature layer name - basically I want to add the name of the visible idividual features under the feature layer name list
so far I loop through the layers & when I get a sublayer(featrue layer) I try doing the IdentifyTask to get the features but none come back?

I should have been more specific...we don't have anything in the API called a "liveMapWidget". Where did the liveMapWidget come from? Who wrote it? You're best bet is to reach out to the developer of the widget.

RashaGarfinkel

What is the "liveMapWidget"?

It's one of the widgets that displays a tree like structure of layer name & feature layer name - basically I want to add the name of the visible idividual features under the feature layer name list
so far I loop through the layers & when I get a sublayer(featrue layer) I try doing the IdentifyTask to get the features but none come back?

derekswingley1

What is the "liveMapWidget"?

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