FeatureLayer Click Tolerance

BrianRassier — Mon, 07 Apr 2014 17:49:41 GMT

Hello -

I have various JS FeatureLayers on my map, and I want to hook in some logic when a feature/graphic is clicked. This works fine using the "click" event, however, mobile devices have difficulty selecting certain features/graphics. We have some point/line symbols that are fairly small, making it difficult to tap with a mobile device.

Is there a simple way to buffer these taps when hooking into the FeatureLayer click event? Or possibly a tolerance setting that I didn't see, similar to the Identify task? This seems like it has to be a common problem when moving to touch-based devices, so I don't want to reinvent something.

Thanks!

Re: FeatureLayer Click Tolerance

williamcarr — Sat, 11 Dec 2021 22:45:33 GMT

This has given me some luck.

   function pointToExtent(map, point, toleranceInPixel) {
       var pixelWidth = map.extent.getWidth() / map.width;
       var toleraceInMapCoords = toleranceInPixel * pixelWidth;
       return new esri.geometry.Extent( point.x - toleraceInMapCoords,
                    point.y - toleraceInMapCoords,
                    point.x + toleraceInMapCoords,
                    point.y + toleraceInMapCoords,
                    map.spatialReference );                           
      }

"onClick"

dojo.connect(map,"onClick",function(evt){
          var query = new esri.tasks.Query();
          query.geometry = pointToExtent(map,evt.mapPoint,10);

topic FeatureLayer Click Tolerance in ArcGIS JavaScript Maps SDK Questions

FeatureLayer Click Tolerance

Re: FeatureLayer Click Tolerance