topic Adjusting text symbol attributes on zoom in ArcGIS JavaScript Maps SDK Questions

Adjusting text symbol attributes on zoom

yangwen — Mon, 15 Jan 2018 18:52:35 GMT

My feature layer has text symbols. I need to dynamically adjust the font size property of the text or hide them altogether, based on the zoom level of the mapview.

What is the pattern to achieve this? I have a watch function on the view.stationary property so I know when the zoom is occurring. However I can't just loop through the layers and change the fontSize property and expect it to reflect on screen - There is no binding between the layer instances and the DOM. Do I just need to brut force it - Delete textSymbol graphics and re-add them with a different font-size?

Re: Adjusting text symbol attributes on zoom

RobertScheitlin__GISP — Mon, 15 Jan 2018 20:22:48 GMT

Yang,

if using 4.6 there is a refresh method on most layers. Have you tried that?

Re: Adjusting text symbol attributes on zoom

yangwen — Mon, 15 Jan 2018 20:25:42 GMT

I have not.. the API describes it as:

refresh()

Since: ArcGIS API for JavaScript 4.6

Fetches all the data for the layer.

It implies the use case where the Layer is sourced from a service URL.. However it may also include the manual instantiation method. I'll give it a try.

Re: Adjusting text symbol attributes on zoom

yangwen — Mon, 15 Jan 2018 20:34:17 GMT

Worked! Thanks!