topic Return more than one result with hitTest in ArcGIS JavaScript Maps SDK Questions

Return more than one result with hitTest

MichaelLodes2 — Sat, 11 Dec 2021 14:30:04 GMT

view.on("click", function (event) { 
  event.stopPropagation();
  var htr; // a single result from HitTestResult results[]
  view.hitTest(event)
     .then(function (response) { 
       if (response.results.length){
         htr = response.results.filter(function (result) {
          return result.graphic.layer === lyr;
         })[0]; 
         console.log(htr); 
         if (htr !== undefined){
             var arr = [];
             arr.push(htr.graphic);
             view.popup.open({
                 location: htr.mapPoint,
                 features: arr 
             }); 
         }
       } 
      }); 
});‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

I'm using the above hitTest function to check wether the user clicked on a feature that is overlapped by a query result feature and open its popup. It is working fine but when clicking on two or more features at the same time i want the arrow to appear in the popup, so the user can switch through. Is it possible to return more than one result?

Re: Return more than one result with hitTest

RobertScheitlin__GISP — Tue, 06 Nov 2018 18:05:10 GMT

Michael,

No the hit test will return one graphic. If you need to get the overlapping graphics you have to do a query using the click point as the queries geometry.

Re: Return more than one result with hitTest

TVlasschaert — Thu, 03 Mar 2022 19:57:44 GMT

I have such a query working client-side for any given FeatureLayerView, but how to do the same for a GraphicsLayerView? GraphicsLayerView supports a queryGraphics() method, but this simply returns all records and there is no way to do a client-side filter that leverages a spatial index (geographically comparing all graphics would be too slow).

The MapView.hitTest doc indicates, "At 4.22 and later, a hit test will return *all* graphics from GraphicsLayer that intersect the specified coordinates.". I'm using version 4.22.2 and in my testing it is only returning a single graphic from the GraphicsLayer, and I don't see any option to affect this. IMO the doc seems to be misleading?

I need to use a GraphicsLayer because I want to create a unique CIMSymbol for each feature depending on multiple attributes / complex logic.