Refresh labels in layer list widget programmatically

Danik-B — Mon, 27 Sep 2021 14:18:34 GMT

Web AppBuilder 2.21 Developer Edition

I'm trying to refresh the labels for a specific layer in the layer list widget. The new labels are dependent of the map view and are recreated at every update-end event for the respective layer.

I can refresh the labels in the layer list widget using the _refresh() method but it collapses the legend for the layer. How can I expand the legend after the _refresh()?

Or, if anyone has a better solution, I'm all ears. Thanks.

Re: Refresh labels in layer list widget programmatically

Danik-B — Mon, 27 Sep 2021 17:04:24 GMT

Through some trialing I was able to come up with a solution. Not sure if this is best practice but it does seem to work.

function updateLayerListLegend(featureLayer){ //Using the Widget Manager get an instance of the Layer List widget let wm = WidgetManager.getInstance(), layerListWidget = wm.getWidgetsByName('LayerList')[0]; if(layerListWidget){ //Get the layer info for the layer who's legend is to be updated let layerInfo = layerListWidget.operLayerInfos.getLayerInfoById(featureLayer.id) //Use the redrawLegends method to update the legend. Parameter must be a layer info, not the feature layer. layerListWidget.layerListView.redrawLegends(layerInfo) } }

I couldn't find any documentation on this, so be forewarned. It may not work in other versions.

topic Refresh labels in layer list widget programmatically in ArcGIS Web AppBuilder Questions

Refresh labels in layer list widget programmatically

Re: Refresh labels in layer list widget programmatically