topic Re: Customize unit lists in the Measurement Widget v4.16 in ArcGIS JavaScript Maps SDK Questions

Customize unit lists in the Measurement Widget v4.16

NilsBabel1 — Mon, 28 Sep 2020 20:27:50 GMT

How do you customize the list of units in the Measurement Widget? When I create the measurement widget (Measurement | ArcGIS API for JavaScript 4.16 ) it gives me access to the distance and area measurement widget tools. While I can specify the arealUnit and linearUnit that should be used as the default for the tool I can't customize the list of units displayed. If I were to create just an AreaMeasurement2D widget or LinearMeasurement2D widget they both have unitOptions property that let's me customize the list. However, when I create just the Measurement widget it doesn't have a unitOptions, or something similar, property. So how do I customize the list of units or is that not possible when using the Measurement widget?

Re: Customize unit lists in the Measurement Widget v4.16

RobertScheitlin__GISP — Tue, 29 Sep 2020 12:56:47 GMT

Nils,

The Measure widgets activeWidget property gives you the AreaMeasurement2D or LinearMeasurement2D depending on which option was chosen by the user.

Re: Customize unit lists in the Measurement Widget v4.16

NilsBabel1 — Wed, 30 Sep 2020 13:50:27 GMT

Thanks Robert, I have seen that property. But I can't seem to figure out how to work with it. It doesn't actually tell you the active widget until a user starts clicking on the map to measure. There are no events on the measurement widget and I'm not sure how to set a listener on the activeWidget property. The only thing I can think of is to use the 'click' event to check the activeWidget and then change the unitOptions. But that seems a little heavy handed every time a user clicks on the map. Is there an easy way to listen for changes to the activeWidget?

Re: Customize unit lists in the Measurement Widget v4.16

RobertScheitlin__GISP — Wed, 30 Sep 2020 14:06:48 GMT

Nils,

OK, you seem to be unfamiliar with the 4.x APIs way of watching properties. Just use watchUtils to watch the activeWidget using the whenDefined method.

Re: Customize unit lists in the Measurement Widget v4.16

NilsBabel1 — Wed, 30 Sep 2020 18:04:56 GMT

Thanks Robert, yes I'm coming from the 3.x API and haven't used watchUtils very much. That does the trick. Thanks very much!