Modify Renderer of FeatureLayer

AndyWright

I am trying to modify the renderer on a FeatureLayer from a local geodatabase and have not had much success.  I can see my modifications to the renderer when I console.log its json, but the changes do not get applied to the layer in the map.  FeatureLayer does not have a refresh like dynamic map layers do, so I'm not sure how to update the layer in the map so it reflects the changes I made to the renderer.   I have included my code below.  Does anyone have any ideas?

import QtQuick 2.3

import QtQuick.Controls 1.2

import ArcGIS.Runtime 10.25

import ArcGIS.Extras 1.0

ApplicationWindow {

    id: appWindow

    width: 800

    height: 600

    title: "SmallSymbolFix"

    property string m_LocalDataPath: System.userHomeFolder.path + "/Documents"

    Map {

        id: appMap

        anchors.fill: parent

        wrapAroundEnabled: true

        ArcGISTiledMapServiceLayer {

            url: "http://services.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer"

        }

        onStatusChanged: {

           if (status === Enums.MapStatusReady)

              damageGdb.path = m_LocalDataPath + "/EpochField/Data/DamageAssessment/WorkAssignments.geodatabase"

        }

        FeatureLayer {

            id: featLyr

            featureTable: featTab

            onStatusChanged: {

                if (status === Enums.LayerStatusInitialized) {

                    var newRenderer = ArcGISRuntime.createObject("UniqueValueRenderer");

                    var oldRenderer = featLyr.renderer;

                    for (var l = 0; l < oldRenderer.uniqueValues.length; ++l) {

                        var newSym = ArcGISRuntime.createObject("PictureMarkerSymbol");

                        newSym = oldRenderer.uniqueValues.symbol

                        newSym.height = 40;

                        newSym.width = 40;

                        var newUVI = ArcGISRuntime.createObject("UniqueValueInfo");

                        newUVI = oldRenderer.uniqueValues;

                        newUVI.symbol = newSym;

                        //console.log("\n\nNEW SYMBOL: " + JSON.stringify(newSym.json));

                        newRenderer.addValue(newUVI);

                    }

                    featLyr.renderer = newRenderer;

                    console.log("\n\nNEW RENDERER: " + JSON.stringify(newRenderer.json));

                }

            }

        }

    }

    Geodatabase {

        id: damageGdb

        onValidChanged: {

            if (valid) {

                //  Add feature layer to map

                var gdbFeatTab = geodatabaseFeatureTable("Work Assignment");

                var operLayer = ArcGISRuntime.createObject("FeatureLayer");

                operLayer.featureTable = gdbFeatTab;

                appMap.addLayer(operLayer);

            }

        }

    }

    GeodatabaseFeatureTable {

        id: featTab

        geodatabase: damageGdb.valid ? damageGdb : null

        featureServiceLayerName: "Work Assignment"

        onGeodatabaseFeatureTableValidChanged: {

            if (geodatabaseFeatureTableValid) {

                console.log("Work Assignment feature table is initialized ...")

            }

        }

    }

}

LucasDanzinger

Hey Andy,

Yes, that should work as well. I think the main issue with your code is that you aren't setting the attributeNames on the feature layer's new renderer. Check out the example below and see if you can get that working in your app.

-Luke

import QtQuick 2.3
import QtQuick.Controls 1.2
import ArcGIS.Runtime 10.25
import ArcGIS.Extras 1.0




ApplicationWindow {
    id: appWindow
    width: 800
    height: 600
    title: "SmallSymbolFix"




    Map {
        id: appMap
        anchors.fill: parent


        ArcGISTiledMapServiceLayer {
            url: "http://services.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer"
        }


        FeatureLayer {
            id: featLyr
            featureTable: featureServiceTable
        }
    }


    Button {
        anchors {
            left: parent.left
            top: parent.top
            margins: 15
        }
        text: "change renderer"
        onClicked: {
            var orig_info_List = featLyr.renderer.uniqueValues;
            var new_renderer = ArcGISRuntime.createObject("UniqueValueRenderer", {attributeNames: featLyr.renderer.attributeNames});
            for (var i = 0; i < orig_info_List.length; ++i) {
                //create the new symbol
                var symbol = orig_info_List.symbol;
                symbol.width = 40;
                symbol.height = 40;
                //create the new UniqueValueInfo
                var newInfo = ArcGISRuntime.createObject("UniqueValueInfo");
                newInfo = orig_info_List;
                newInfo.symbol = symbol;
                new_renderer.addValue(newInfo);
            }
            featLyr.renderer = new_renderer;
        }
    }




    GeodatabaseFeatureServiceTable {
        id: featureServiceTable
        url: "http://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer/0"
    }
}