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SVG and CSS to style polygons
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Description
Style polygon features using CSS. County polygons are shaded according to the total foreign born population. A CSS animation is used to gradually change county boundaries as the mouse cursor moves across the map. Not supported in browsers that do not support SVG.Code
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<title>2010 Foreign Born Population</title>
<link rel="stylesheet" href="https://js.arcgis.com/3.46/esri/css/jsapi.css"/>
<link rel="stylesheet" href="slider.css"/>
<style>
html, body {
height: 100%;
width: 100%;
margin: 0;
padding: 0;
font-size: 0.90em;
font-family: Verdana, Helvetica, sans-serif;
color: #282a2c;
}
#map {
height: 100%;
width: 100%;
}
#legend {
left: 1em;
bottom: 1em;
position: absolute;
height: 265px;
width: 210px;
background-color: #FFFFFF;
opacity: 0.85;
border-radius: 7px;
z-index: 999;
padding: 1em;
font-size: 0.85em;
}
#header {
font-weight: bold;
}
/* styles applied to features */
path[data-classbreak="classbreak0"] {
stroke: rgb(255, 245, 220);
stroke-width: 1pt;
stroke-opacity: 0.35;
fill: rgb(255, 215, 120);
fill-opacity: 0.8;
}
path[data-classbreak="classbreak1"] {
stroke: rgb(255, 233, 185);
stroke-width: 1pt;
stroke-opacity: 0.35;
fill: rgb(255, 193, 60);
fill-opacity: 0.8;
}
path[data-classbreak="classbreak2"] {
stroke: rgb(255, 220, 150);
stroke-width: 1pt;
stroke-opacity: 0.35;
fill: rgb(255, 170, 0);
fill-opacity: 0.8;
}
path[data-classbreak="classbreak3"] {
stroke: rgb(253, 210, 120);
stroke-width: 1pt;
stroke-opacity: 0.35;
fill: rgb(241, 162, 6);
fill-opacity: 0.8;
}
path[data-classbreak="classbreak4"] {
stroke: rgb(250, 200, 90);
stroke-width: 1pt;
stroke-opacity: 0.35;
fill: rgb(226, 154, 11);
fill-opacity: 0.8;
}
path[data-classbreak="classbreak5"] {
stroke: rgb(248, 186, 60);
stroke-width: 1pt;
stroke-opacity: 0.35;
fill: rgb(211, 146, 17);
fill-opacity: 0.8;
}
path[data-classbreak="classbreak6"] {
stroke: rgb(245, 172, 29);
stroke-width: 1pt;
stroke-opacity: 0.35;
fill: rgb(196, 138, 23);
fill-opacity: 0.8;
}
path[data-classbreak="classbreak7"] {
stroke: rgb(227, 163, 36);
stroke-width: 1pt;
stroke-opacity: 0.35;
fill: rgb(182, 131, 29);
fill-opacity: 0.8;
}
path[data-classbreak="classbreak8"] {
stroke: rgb(209, 154, 43);
stroke-width: 1pt;
stroke-opacity: 0.35;
fill: rgb(167, 123, 34);
fill-opacity: 0.8;
}
path[data-classbreak="classbreak9"] {
stroke: rgb(190, 144, 53);
stroke-width: 1pt;
stroke-opacity: 0.35;
fill: rgb(152, 115, 40);
fill-opacity: 0.8;
}
/* mouse hover animation */
@keyframes highlight {
100% {
fill-opacity: 1;
stroke-width: 4;
stroke: rgb(220, 20, 60);
}
}
@-webkit-keyframes highlight {
100% {
fill-opacity: 1;
stroke-width: 4;
stroke: rgb(220, 20, 60);
}
}
path:hover {
cursor: pointer;
animation-duration: 0.2s;
animation-name: highlight;
animation-timing-function: linear;
animation-fill-mode: forwards;
-webkit-animation-duration: 0.2s;
-webkit-animation-name: highlight;
-webkit-animation-timing-function: linear;
-webkit-animation-fill-mode: forwards;
}
</style>
<script src="https://js.arcgis.com/3.46/"></script>
<script>
require([
"esri/map",
"esri/layers/FeatureLayer",
"dojo/_base/array",
"dojo/dom",
"dojo/dom-construct",
"dojo/on",
"dojo/parser",
"dojo/ready"
], function (Map, FeatureLayer, array, dom, domConstruct, on, parser, ready) {
parser.parse();
var map,
classbreaks = [];
ready(function () {
classbreaks = [
{
attribute:"classbreak0",
value:7121,
legendLabel:"0 - 7,121"
},
{
attribute:"classbreak1",
value:25243,
legendLabel:"7,122 - 25,243"
},
{
attribute:"classbreak2",
value:55082,
legendLabel:"25,244 - 55,082"
},
{
attribute:"classbreak3",
value:89166,
legendLabel:"55,082 - 89,165"
},
{
attribute:"classbreak4",
value:143527,
legendLabel:"89,166 - 143,526"
},
{
attribute:"classbreak5",
value:225537,
legendLabel:"143,527- 225,536"
},
{
attribute:"classbreak6",
value:388427,
legendLabel:"225,537 - 388,426"
},
{
attribute:"classbreak7",
value:677299,
legendLabel:"388,427 - 677,298"
},
{
attribute:"classbreak8",
value:1214895,
legendLabel:"677,299 - 1,214,894"
},
{
attribute:"classbreak9",
value:7121,
legendLabel:"1,214,895 or greater"
}
];
map = new Map("map", {
basemap: "gray-vector",
center: [-98.5795, 39.828175],
zoom: 3
});
// draw legend items
array.forEach(classbreaks, function (classbreak, i) {
domConstruct.create("div", {
innerHTML:'<svg width="20" height="20" version="1.1" xmlns="http://www.w3.org/2000/svg">' +
'<path data-classbreak="' + classbreak.attribute + '" d="M 0 0 L 23 0 L 23 23 L 0 23 Z" />' +
'</svg><span style="vertical-align: top; padding-left: 3px">' + classbreak.legendLabel + '</span>'
}, 'legend');
});
addFeatureLayer();
});
function addFeatureLayer() {
var featureLayer = new FeatureLayer("https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/fbTrim/FeatureServer/0", {
id:"featureLayer",
styling:false,
dataAttributes:["fb_pop"]
});
on(featureLayer, "mouse-over", function (evt) {
console.log("FB: " + evt.graphic.attributes.fb_pop);
});
if (featureLayer.surfaceType === "svg") {
on(featureLayer, "graphic-draw", function (evt) {
var tableAttr = evt.graphic.attributes.fb_pop;
var category;
if (tableAttr < classbreaks[0].value) {
category = classbreaks[0].attribute;
} else if (tableAttr >= classbreaks[0].value && tableAttr < classbreaks[1].value) {
category = classbreaks[1].attribute;
} else if (tableAttr >= classbreaks[1].value && tableAttr < classbreaks[2].value) {
category = classbreaks[2].attribute;
} else if (tableAttr >= classbreaks[2].value && tableAttr < classbreaks[3].value) {
category = classbreaks[3].attribute;
} else if (tableAttr >= classbreaks[3].value && tableAttr < classbreaks[4].value) {
category = classbreaks[4].attribute;
} else if (tableAttr >= classbreaks[4].value && tableAttr < classbreaks[5].value) {
category = classbreaks[5].attribute;
} else if (tableAttr >= classbreaks[5].value && tableAttr < classbreaks[6].value) {
category = classbreaks[6].attribute;
} else if (tableAttr >= classbreaks[6].value && tableAttr < classbreaks[7].value) {
category = classbreaks[7].attribute;
} else if (tableAttr >= classbreaks[7].value && tableAttr < classbreaks[8].value) {
category = classbreaks[8].attribute;
} else if (tableAttr >= classbreaks[8].value) {
category = classbreaks[9].attribute;
}
// set the data attribute for the current feature
evt.node.setAttribute("data-classbreak", category);
});
} else {
alert("Your browser does not support SVG.\nPlease user a modern web browser that supports SVG.");
dom.byId("legend").innerHTML = "Your browser does not support SVG.";
}
map.addLayer(featureLayer);
return featureLayer;
}
});
</script>
</head>
<body>
<div id="map"></div>
<div id="legend">
<div id="header">2010 Foreign Born Population</div>
<hr/>
</div>
</body>
</html>