<html>
<head>
<meta charset="utf-8" />
<meta
name="viewport"
content="initial-scale=1,maximum-scale=1,user-scalable=no"
/>
<!--
ArcGIS API for JavaScript, https://js.arcgis.com
For more information about the intro-mapview sample, read the original sample description at developers.arcgis.com.
https://developers.arcgis.com/javascript/latest/sample-code/intro-mapview/index.html
-->
<title>Intro to MapView - Create a 2D map - 4.15</title>
<style>
html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>
<link
rel="stylesheet"
href="https://js.arcgis.com/4.15/esri/themes/light/main.css"
/>
<script src="https://js.arcgis.com/4.15/"></script>
<script>
require(["esri/Map", "esri/views/MapView"], function(Map, MapView) {
var map = new Map({
basemap: "streets"
});
var view = new MapView({
container: "viewDiv",
map: map,
zoom: 4,
center: [15, 65] // longitude, latitude
});
view.when(function() {
view.goTo({
center:[-86, 35]
}).then(function(){
//build in 3 second delay to allow zoom to finish
setTimeout(function() {
//take screenshot
view.takeScreenshot().then(function(screenshot){
//build canvas
const imageData=screenshot.data;
const canvas =document.createElement("canvas");
const context = canvas.getContext("2d");
canvas.height = imageData.height;
canvas.width = imageData.width;
//add screenshot to canvas
context.putImageData(imageData,0,0);
context.font = "12px Arial";
context.fillStyle="#fff";
context.fillRect(canvas.width-300,0,300,80);
context.fillStyle = "#000";
context.fillText("Test", imageData.width-280,15);
const dataUrl = canvas.toDataURL();
//download image
if (!window.navigator.msSaveOrOpenBlob) {
// in browsers that support the download attribute
// a link is created and a programmatic click will trigger the download
const element = document.createElement("a");
element.setAttribute("href", dataUrl);
element.setAttribute("download", filename);
element.style.display = "none";
document.body.appendChild(element);
element.click();
document.body.removeChild(element);
} else {
// for MS browsers convert dataUrl to Blob
const byteString = atob(dataUrl.split(",")[1]);
const mimeString = dataUrl
.split(",")[0]
.split(":")[1]
.split(";")[0];
const ab = new ArrayBuffer(byteString.length);
const ia = new Uint8Array(ab);
for (let i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
const blob = new Blob([ab], { type: mimeString });
//set file name
//assumes event time is in ISO format (eg YYYY-MM-DDTHH:MM:SSZ);
var filename = "test.png";
//download file
//console.log("filename: " + filename);
window.navigator.msSaveOrOpenBlob(blob, filename);
}
});
},5000);
});
});
});
</script>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>