renderer.fromJSON

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05-21-2019 02:51 AM
deleted-user-wcpelUUf_XXx
New Contributor III

I am trying to convert a layer back to its original drawing,after changing it.

the service include the layer in json form(i think) i tried both the fromJSON func and rewriting it manually but I think there is something wrong with the way i wrote it.

heres a codepen:

https://codepen.io/segev-salman/pen/MdEbwv

*is there a function to revertback to the original drawing or do i have to change the renderer with the full info inside?  

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1 Solution

Accepted Solutions
RobertScheitlin__GISP
MVP Esteemed Contributor

Then just clone the original renderer for latter use:

<html>

<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Heat-map creator</title>
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">

<style>
#rendPanel {
padding: 10px;
background-color: rgba(255, 255, 255, 0.8);
}

.esri-button {
margin: 2px;
}

html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>

<!-- <link rel="stylesheet" href="https://js.arcgis.com/4.11/esri/css/main.css"> -->
<link
rel="stylesheet"
href="https://js.arcgis.com/4.11/esri/themes/light/main.css"
/>
<script src="https://js.arcgis.com/4.11/"></script>

<script>
var origRend;
require([
"esri/Map",
"esri/views/MapView",
"esri/layers/FeatureLayer",
"esri/renderers/smartMapping/creators/heatmap"
], function (Map, MapView, FeatureLayer, heatmapRendererCreator) {

var pov = new FeatureLayer({
url: "https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/ACS_Poverty_by_Age_Boundaries/FeatureServer/1",
minScale: 40000000,
maxScale: 4000
});

var TF = new FeatureLayer({
url: "https://services3.arcgis.com/1pxU2hJU9ZszJDcX/ArcGIS/rest/services/Young_Adult_Treatment_Facilities/FeatureServer/0",
});

//apply HM to layer
function apply(result) {
origRend = TF.renderer.clone();
TF.renderer = result.renderer;
};

function remove() {
console.log("removing")
TF.renderer = origRend;
}

var map = new Map({
basemap: "gray",
layers: [pov, TF]
});

var view = new MapView({
container: "viewDiv",
map: map,
center: [-102.370576, 40.172530],
zoom: 5
});

var heatmapParams = {
layer: TF,
basemap: map.basemap,
field: "adlt",
view: view
};

document.getElementById("butt-1").addEventListener("click", function () {
heatmapRendererCreator.createRenderer(heatmapParams).then(apply)
});

document.getElementById("butt-2").addEventListener("click", function () {
remove();
});

view.ui.add("rendPanel", "top-right");
});
</script>
</head>

<body>
<div id="viewDiv"></div>
<div id="rendPanel" class="esri-widget">
<button id="butt-1" class="esri-button">
create Heatmap
</button>
<button id="butt-2" class="esri-button">
remove Heatmap
</button>
</div>
</body>

</html>

View solution in original post

6 Replies
RobertScheitlin__GISP
MVP Esteemed Contributor

Segev,

   Here is your code working (with some UI changes):

<html>

<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Heat-map creator</title>
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">

<style>
#rendPanel {
padding: 10px;
background-color: rgba(255, 255, 255, 0.8);
}

.esri-button {
margin: 2px;
}

html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>

<!-- <link rel="stylesheet" href="https://js.arcgis.com/4.11/esri/css/main.css"> -->
<link
rel="stylesheet"
href="https://js.arcgis.com/4.11/esri/themes/light/main.css"
/>
<script src="https://js.arcgis.com/4.11/"></script>

<script>
require([
"esri/Map",
"esri/views/MapView",
"esri/layers/FeatureLayer",
"esri/renderers/smartMapping/creators/heatmap"
], function (Map, MapView, FeatureLayer, heatmapRendererCreator) {

var pov = new FeatureLayer({
url: "https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/ACS_Poverty_by_Age_Boundaries/FeatureServer/1",
minScale: 40000000,
maxScale: 4000
});

var TF = new FeatureLayer({
url: "https://services3.arcgis.com/1pxU2hJU9ZszJDcX/ArcGIS/rest/services/Young_Adult_Treatment_Facilities/FeatureServer/0",
});

//apply HM to layer
function apply(result) {
console.log("applying")
TF.renderer = result.renderer;
};

function remove() {
console.log("removing")
/////instead of this
TF.renderer = {
type: "simple",
symbol: {
type: "simple-marker",
style: "circle",
color: [0, 197, 255, 255],
size: 7,
outline: {
color: [255, 255, 255, 255],
width: 0.75
}
}
}
}

var map = new Map({
basemap: "gray",
layers: [pov, TF]
});

var view = new MapView({
container: "viewDiv",
map: map,
center: [-102.370576, 40.172530],
zoom: 5
});

var heatmapParams = {
layer: TF,
basemap: map.basemap,
field: "adlt",
view: view
};

document.getElementById("butt-1").addEventListener("click", function () {
heatmapRendererCreator.createRenderer(heatmapParams).then(apply)
});

document.getElementById("butt-2").addEventListener("click", function () {
remove();
});

view.ui.add("rendPanel", "top-right");
});
</script>
</head>

<body>
<div id="viewDiv"></div>
<div id="rendPanel" class="esri-widget">
<button id="butt-1" class="esri-button">
create Heatmap
</button>
<button id="butt-2" class="esri-button">
remove Heatmap
</button>
</div>
</body>

</html>
deleted-user-wcpelUUf_XXx
New Contributor III

Robert,

this is exactly what i wanted  to do, but I still want to know about the fromJSON or a different solution to handle multiple layers with different symbology.
lets say i have a select with three point layers so i could make a heatmap from each individually.

what would you do if you'd want the layers to go back to their original symbology.

i know you can just make a new FeatureLayer and add it but what if I gave the user the ability to query the layer and dont want to lose that info.

0 Kudos
RobertScheitlin__GISP
MVP Esteemed Contributor

Then just clone the original renderer for latter use:

<html>

<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Heat-map creator</title>
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">

<style>
#rendPanel {
padding: 10px;
background-color: rgba(255, 255, 255, 0.8);
}

.esri-button {
margin: 2px;
}

html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>

<!-- <link rel="stylesheet" href="https://js.arcgis.com/4.11/esri/css/main.css"> -->
<link
rel="stylesheet"
href="https://js.arcgis.com/4.11/esri/themes/light/main.css"
/>
<script src="https://js.arcgis.com/4.11/"></script>

<script>
var origRend;
require([
"esri/Map",
"esri/views/MapView",
"esri/layers/FeatureLayer",
"esri/renderers/smartMapping/creators/heatmap"
], function (Map, MapView, FeatureLayer, heatmapRendererCreator) {

var pov = new FeatureLayer({
url: "https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/ACS_Poverty_by_Age_Boundaries/FeatureServer/1",
minScale: 40000000,
maxScale: 4000
});

var TF = new FeatureLayer({
url: "https://services3.arcgis.com/1pxU2hJU9ZszJDcX/ArcGIS/rest/services/Young_Adult_Treatment_Facilities/FeatureServer/0",
});

//apply HM to layer
function apply(result) {
origRend = TF.renderer.clone();
TF.renderer = result.renderer;
};

function remove() {
console.log("removing")
TF.renderer = origRend;
}

var map = new Map({
basemap: "gray",
layers: [pov, TF]
});

var view = new MapView({
container: "viewDiv",
map: map,
center: [-102.370576, 40.172530],
zoom: 5
});

var heatmapParams = {
layer: TF,
basemap: map.basemap,
field: "adlt",
view: view
};

document.getElementById("butt-1").addEventListener("click", function () {
heatmapRendererCreator.createRenderer(heatmapParams).then(apply)
});

document.getElementById("butt-2").addEventListener("click", function () {
remove();
});

view.ui.add("rendPanel", "top-right");
});
</script>
</head>

<body>
<div id="viewDiv"></div>
<div id="rendPanel" class="esri-widget">
<button id="butt-1" class="esri-button">
create Heatmap
</button>
<button id="butt-2" class="esri-button">
remove Heatmap
</button>
</div>
</body>

</html>

View solution in original post

deleted-user-wcpelUUf_XXx
New Contributor III

thank you so much that will work!

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deleted-user-wcpelUUf_XXx
New Contributor III

Robert,

You used the " class="esri-widget"" for the panel.
Does that mean Its possible to use the Expand function on it?

I am using this as an example:

https://developers.arcgis.com/javascript/latest/sample-code/widgets-expand/index.html

but Im not sure how to declare the panel or if its possible at all.

0 Kudos
RobertScheitlin__GISP
MVP Esteemed Contributor

Sure just use:

      var bgExpand = new Expand({
view: view,
content: document.getElementById("rendPanel")
});
view.ui.add(bgExpand, "top-right");