If you want to modify the existing tooltips for the measurement buttons you can do so by modifying the strings that come with the API. For details take a look at the Default API Strings help topic.
And here's a code example showing how to modify the measurement widget strings:
<!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>Measure Tool</title>
<link rel="stylesheet" href="https://js.arcgis.com/3.15/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="https://js.arcgis.com/3.15/esri/css/esri.css">
<style>
html,body, #map{
height:100%;
width:100%;
margin:0;
}
body {
background-color:#FFF;
overflow:hidden;
font-family:"Trebuchet MS";
}
#measurementDiv{
position: absolute;
z-index: 1;
top:20px;
right:20px;
background-color: #fff;
width:200px;
height:200px;
}
</style>
<script src="https://js.arcgis.com/3.15/"></script>
<script>
var map;
require([
"dojo/dom",
"esri/Color",
"dojo/keys",
"dojo/parser",
"esri/config",
"esri/sniff",
"esri/map",
"esri/SnappingManager",
"esri/dijit/Measurement",
"esri/layers/FeatureLayer",
"esri/renderers/SimpleRenderer",
"esri/tasks/GeometryService",
"esri/symbols/SimpleLineSymbol",
"esri/symbols/SimpleFillSymbol",
"dojo/i18n!esri/nls/jsapi",
"dojo/domReady!"
], function(
dom, Color, keys, parser,
esriConfig, has, Map, SnappingManager, Measurement, FeatureLayer, SimpleRenderer, GeometryService, SimpleLineSymbol, SimpleFillSymbol, esriBundle
) {
parser.parse();
map = new Map("map", {
basemap: "satellite",
center: [-85.743, 38.256],
zoom: 17
});
// modify measurement widget tooltips
console.log(esriBundle);
esriBundle.widgets.measurement.NLS_area = "Measure Area - double click to finish";
esriBundle.widgets.measurement.NLS_distance = "Measure Distance - double click to finish";
var sfs = new SimpleFillSymbol(
"solid",
new SimpleLineSymbol("solid", new Color([195, 176, 23]), 2),
null
);
var parcelsLayer = new FeatureLayer("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Louisville/LOJIC_LandRecords_Louisville/M...", {
mode: FeatureLayer.MODE_ONDEMAND,
outFields: ["*"]
});
parcelsLayer.setRenderer(new SimpleRenderer(sfs));
map.addLayers([parcelsLayer]);
var layerInfos = [{
layer: parcelsLayer
}];
var measurement = new Measurement({
map: map
}, dom.byId("measurementDiv"));
measurement.startup();
});
</script>
</head>
<body>
<div id="map"></div>
<div id="measurementDiv"></div>
</body>
</html>
Alas, those unsupported properties seem to have been removed sometime between 3.11 (doesn't actually work, but I can see the properties in a debug window, so I'm sure it would with some tweaking) and 3.15 - non of the properties Area, Distance or location exist - or if they do they are further down the "tree" of properties _ i'll try to dig further
