topic Re: How to get view.goTo to loop through multiple graphics... in ArcGIS JavaScript Maps SDK Questions

How to get view.goTo to loop through multiple graphics...

Lake_Country_GIS — Wed, 03 Aug 2022 16:32:33 GMT

Hi there...

I'm trying to animate through a set of graphics from a featurelayer. For some reason my code only zooms to the last feature (or, just zooms through all of them so fast it gets to the end).

Here is the code I am using:

view.whenLayerView(featureLayer).then(function(layerView) { layerView.watch("updating", function(value) { if (!value) { // wait for the layer view to finish updating if (loading != "done") { // query all the features available for drawing. layerView .queryFeatures( { geometry: featureLayer.extent, returnGeometry: true }) .then(function(results) { graphics = results.features; graphics.forEach(function(result, index) { lat = result.geometry.latitude; lon = result.geometry.longitude; view.goTo( { center: [lon, lat], zoom: 4 }, { duration: 30000, maxDuration: 30000, }) }); loading = "done"; }) .catch(function(error) { console.error("query failed: ", error); }); } } }); });

I would like the application to zoom to one graphic, wait 2 seconds, then pan over to the next graphic and so on.

Thanks in advance,

Re: How to get view.goTo to loop through multiple graphics...

JoelBennett — Wed, 03 Aug 2022 18:34:26 GMT

Perhaps something like the following:

Re: How to get view.goTo to loop through multiple graphics...

Lake_Country_GIS — Wed, 03 Aug 2022 18:42:54 GMT

Thanks. That looks like a good approach...

Seems it zooms to the first feature, then errors out though:

Not sure why. Will debug a bit.

Cheers.

Re: How to get view.goTo to loop through multiple graphics...

JoelBennett — Wed, 03 Aug 2022 19:32:55 GMT

One thing I see is that the line with window.setTimeout should instead be:

window.setTimeout(stepThroughGraphics.bind(window, view, graphics, index), 2000);

(forgot about that first argument in the call to bind...)