Define a circle extent using the circle tool - arcgis javascript api

Question

I have the following script for drawing a circle and I want to limit the user to a predefined radius:

$('#circle').click(function () {
 clearPreviousSearch();
 map.disableMapNavigation();
 $('#run').fadeOut();
 buttonclickvalue = 'circle';
 drawToolbar.activate(esri.toolbars.Draw.CIRCLE);
 }); 

Where should I specify that I want to define the specific radius using the ArcGIS API script?:

var symbol = new SimpleFillSymbol().setColor(null).outline.setColor("blue");
 var gl = new GraphicsLayer({ id: "circles" });
 var geodesic = dom.byId("geodesic");
 map.addLayer(gl);
 map.on("click", function(e) {
 var radius = map.extent.getWidth() / 100;
 var circle = new Circle({
 center: e.mapPoint,
 geodesic: domAttr.get(geodesic, "checked"),
 radius: radius
 });

• Chad Cooper: Are you getting an error, unexpected behavior, etc?

Answer 1

You will want to require the Units module "esri/units" and pass the units to the circle this way

var circle = new Circle({
 center: e.mapPoint,
 geodesic: domAttr.get(geodesic, "checked"),
 radius: 100, 
 radiusUnit:units.MILES
});

More info on units here

• Derek Swingley: Everything in esri/units maps to a string, so instead of the extra code, you could use the string directly. For miles, it's "esriMiles". The rest are: i.imgur.com/wCM71id.png
• user2932466: Sorry but how do I use the string directly?
• Aamir Suleman: instead of units.MILES you put in "esriMiles"