topic Re: Get Graphic(s) at Click Location? in ArcGIS JavaScript Maps SDK Questions

Get Graphic(s) at Click Location?

TonyCollins — Wed, 15 May 2019 11:43:18 GMT

If I have a GraphicsLayer with say 3 graphics added to it that overlap is there a way from a click on the overlap area to return all three graphics?

I started with view.hitTest(), but this only returns the topmost graphic, not all graphics under the click.

I then looked at layerView.queryFeatures() but the promise never occurs so I wonder if this does work with a Graphics Layer?

So basically, using v4 is there a way to get all graphics from a single Graphics Layer that intersect a point (cliick).

Many Thanks,

Re: Get Graphic(s) at Click Location?

RobertScheitlin__GISP — Wed, 15 May 2019 12:42:46 GMT

Tony,

A GraphicsLayer has a GraphicsLayerView and a queryGraphics method (not QueryFeatures).

https://developers.arcgis.com/javascript/latest/api-reference/esri-views-layers-GraphicsLayerView.html#queryGraphics

Re: Get Graphic(s) at Click Location?

TonyCollins — Wed, 15 May 2019 12:48:29 GMT

Hi Robert

I did see that, but there are no parameters to pass in a query/geometry; so it looks like all that does is return all graphics from a Graphics Layer rather than a subset?

Thanks,
Tony

Re: Get Graphic(s) at Click Location?

TonyCollins — Wed, 15 May 2019 12:53:53 GMT

... the only thing I could think of was using contains/intersects from the geometryEngine)against each graphic.geom, but it seems a but OTT.oes not offer the

I find it a little odd that hitTest only offers the top most

Re: Get Graphic(s) at Click Location?

RobertScheitlin__GISP — Wed, 15 May 2019 13:13:07 GMT

Tony,

Now I remember. The recommendation from the team is to use a FeatureLayer from a graphics collection instead.

Re: Get Graphic(s) at Click Location?

TonyCollins — Wed, 15 May 2019 13:23:53 GMT

Hi Robert,

Not sure what you mean. Create a FeatureLayer from a graphics collection to then query?

Thanks,

Re: Get Graphic(s) at Click Location?

RobertScheitlin__GISP — Wed, 15 May 2019 14:14:07 GMT

Tony,

Yes instead of using a GraphicsLayer, use a FeatureLayer and then you can use queryFeatures.

Re: Get Graphic(s) at Click Location?

TonyCollins — Wed, 15 May 2019 14:47:50 GMT

Oh wow, OK,

I am using the SketchViewModel for the drawing/transformation part of the application. Seems like this is going to be a real pain to to flip back and forward from the GraphicsLayer to FeatureLayer just to allow selection of overlapping graphics.