How to update UniqueValueRenderer with new symbols

ironmaskito — Fri, 12 Nov 2021 23:59:11 GMT

Hello all, I am wondering if it's possible to update UniqueValueRenderer after it has been initialized with symbols and their corresponding fieldNames. My application creates a GeoJSONLayer, which is assigned a UniqueValueRenderer that contains all the symbol information for the displayed geoFeatures. However, I'd like to update some of the symbols for the rendered geoFeatures if a user hovers over it or selects it.

The only case where I have been able to update a symbol within the geojson layer is when the UniqueValueRenderer already contains the fieldName, symbol pair. Is it possible to add a new symbol to the UniqueValueRenderer and refresh it so that a specific geoFeature's symbol gets updated? I've tried reassigning the renderer property of GeoJSONLayer after modifying the UVR, but the symbol that's supposed to change style just disappears.

private updateFeatures(results, layer: GeoJSONLayer) { if (results.length > 0) { const updatedGraphics = { updateFeatures: [] } results.forEach((feature) => { feature.attributes[UNIQUE_VALUE_RENDERER_FIELD] = "drawing"; // set new style updatedGraphics.updateFeatures.push(feature); // update geojson feature }) let symbol = { type: "simple-marker", // autocasts as new SimpleMarkerSymbol() style: "square", color: "blue", size: "8px", // pixels outline: { // autocasts as new SimpleLineSymbol() color: [ 255, 255, 0 ], width: 3 // points } }; const renderer = layer.renderer as UniqueValueRenderer; renderer.addUniqueValueInfo("drawing", symbol); // assign new symbol to new style if (updatedGraphics.updateFeatures.length > 0){ this.applyEditsToGeoJSON(updatedGraphics, layer); // apply changes to feature } } } private applyEditsToGeoJSON(params, layer: GeoJSONLayer) { layer.applyEdits(params) .then((result) => { result.updateFeatureResults.forEach((updatedFeature) => { console.log('feature with id ' + updatedFeature.objectId + ' updated'); }) }) }

topic How to update UniqueValueRenderer with new symbols in ArcGIS JavaScript Maps SDK Questions

How to update UniqueValueRenderer with new symbols