topic Re: clear graphics in stream layer Web App builder code in ArcGIS JavaScript Maps SDK Questions

clear graphics in stream layer Web App builder code

Pa_Lotus — Mon, 18 Mar 2019 15:55:05 GMT

I have a stream layer configured in web app builder.

data is related to ongoing trips tracking. stream layer only gets data related to active trips.

map is not clearing previous trips data(point)

can anyone suggest me where to clear the map graphics

Thanks

Re: clear graphics in stream layer Web App builder code

RobertScheitlin__GISP — Mon, 18 Mar 2019 16:04:10 GMT

https://developers.arcgis.com/javascript/3/jsapi/streamlayer-amd.html#clear

Re: clear graphics in stream layer Web App builder code

Pa_Lotus — Mon, 18 Mar 2019 16:22:09 GMT

hi Robert thanks for your reply, can we able to add this line in WAB code or need to create a custom application

Thanks

Re: clear graphics in stream layer Web App builder code

RobertScheitlin__GISP — Mon, 18 Mar 2019 16:39:59 GMT

Are you talking about a WAB app hosted on AGOL?

Re: clear graphics in stream layer Web App builder code

Pa_Lotus — Mon, 18 Mar 2019 16:59:13 GMT

I downloaded WAB code from online, I'm trying to clear graphics clear in that code

Re: clear graphics in stream layer Web App builder code

RobertScheitlin__GISP — Mon, 18 Mar 2019 17:06:21 GMT

Then yes it will require custom development to add that line.

Re: clear graphics in stream layer Web App builder code

Pa_Lotus — Sun, 12 Dec 2021 04:46:33 GMT

Robert, I created a custom html page, where I need to add clear graphics line

<!doctype html>

<html>

<head>

<meta charset="utf-8">

<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no" />

<title>StreamLayer-Simple</title>

<link rel="stylesheet" href="https://js.arcgis.com/3.27/esri/css/esri.css">

<style type="text/css">

html,

body {

height: 100%;

width: 100%;

margin: 0;

padding: 0;

overflow: hidden;

}

.banner {

margin-top: 5px;

margin-bottom: 5px;

color: #000080;

font-size: 2em;

font-weight: bold;

}

#mapDiv {

height: 90%;

width: 100%;

margin: 0;

padding: 0;

overflow: hidden;

}

</style>

<script src="https://js.arcgis.com/3.27/"></script>

</head>

<body>

<div class="banner">

Scooter Data Stream Feed

</div>

<div id="mapDiv"></div>

</body>

<script type="text/javascript">

require([

"esri/map",

"esri/InfoTemplate",

"esri/layers/StreamLayer",

"dojo/domReady!"

 ], function(Map, InfoTemplate, StreamLayer){

var url = "http://abc.123.com/arcgis/rest/services/StatusinputStream/StreamServer";

var streamLayer = new StreamLayer(url, {

infoTemplate: new InfoTemplate("Attributes", "${*}")

});

var map = new Map("mapDiv", {

basemap: "topo",

center: [-90, 50],

zoom: 13

});

map.addLayer(streamLayer);

});

</script>

</html>
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Re: clear graphics in stream layer Web App builder code

RobertScheitlin__GISP — Mon, 18 Mar 2019 18:01:30 GMT

Then just call the clear method on the streamLayer object.

Re: clear graphics in stream layer Web App builder code

Pa_Lotus — Mon, 18 Mar 2019 18:17:07 GMT

it solved by below lines in stream layer object

purgeOptions: {

displayCount: 2000,

age: 2.5

}