topic Re: Accessing Graphics on a Map in 4.0Beta in ArcGIS JavaScript Maps SDK Questions

Accessing Graphics on a Map in 4.0Beta

lanceweaver — Fri, 26 Feb 2016 15:02:43 GMT

I can't seem to access the graphics on the Map in 4.0Beta.

In the documentation, it says graphics are no longer stored in 'map' or 'featureLayer', but "as graphics inside a LayerView"

But I can't seem to get View.getLayerView() or any other construct to work in order to access the graphics in my featureLayer loaded from Arc Server.

I don't even see them in the console under console.log(view.layerViews.item[]...)

Can someone show me just a simple example of how to access the graphics on a map?

Re: Accessing Graphics on a Map in 4.0Beta

lanceweaver — Fri, 26 Feb 2016 15:14:52 GMT

Just to clarify, I'm hoping to loop through the graphics to modify them (like the old API did with "map.graphics", perhaps with something like this....

var mapgraphics = view.getLayerView(myFeatureLayer);

dojo.forEach(mapgraphics, function(g){

//console.log(g);

if (g.attributes.pub_title == var"){ change style };

});

Right now I can't even find a way to access graphics when clicking them ---like the old

view.on("click", function(evt) {

graphic = evt.graphic

});

help please...

Re: Accessing Graphics on a Map in 4.0Beta

ReneRubalcava — Fri, 26 Feb 2016 17:55:54 GMT

Here is a sample showing how to get the graphics with a LayerView.

JS Bin - Collaborative JavaScript Debugging

I don't think you can style the graphic in place though, you may need to use graphic.clone() and apply a new symbol and add it to the map.graphics layer.

Re: Accessing Graphics on a Map in 4.0Beta

lanceweaver — Tue, 01 Mar 2016 18:00:53 GMT

That example returns graphics properties only in MapView (and even then only .length is available... the geometry and attributes seem to be private and inaccessible)

I need to access map graphics in SceneView. Is there ANY native way to do this? Will a getter function be available in the official release?

using getCanvas3DGraphics() or something?

I'd rather not hit the server with a query/identifyTask when the info from the featureclass is already on the map.

Something like,

var fLayerView;

view.on("layer-view-create", function(evt) { //unlike view.then, this fires as EACH layer is converted to a layerview

if (evt.layer.id === "myFeatureClassId") {

var fLayerView = evt.layerView;

var graphics = fLayerView.getCanvas3DGraphics();

graphics.forEach(function(item, i){

console.log(item+", "+i);

//get attributes for custom mouse-over events or custom search

});

}

});