topic Re: Interactive Filter Template - Replacing Default Dropdown with Dijit FilteringSelect in ArcGIS JavaScript Maps SDK Questions

Interactive Filter Template - Replacing Default Dropdown with Dijit FilteringSelect

MarissaWalter — Sat, 11 Dec 2021 08:23:44 GMT

I am currently working off of the latest version of the Interactive Filter template. (GitHub - Esri/InteractiveFilter: Filter is a configurable application template that displays a map with an interactive f… )

And I need to replace the default drop down with a Dijit FilteringSelect from the Dojo Toolkit (dijit.form.FilteringSelect — The Dojo Toolkit - Reference Guide)

This will allow the user to provide input in addition to the drop down, with autocomplete functionality when typing. I prefer the FilteringSelect as it will give an error if their search field isn't found in the layer.

I have been trying to do this in a way that works with the overall template structure, as to not completely blow up the map filtering functionality. Currently, I have found a way to replace the drop down for layers with coded values, but the string type layers are not drawing the Dijit at all.

Here is the _createFilterField function, where filter fields are created based on the layer type (coded values, integer, string):

_createFilterField: function(param, filterLayer, fields) {

      var deferred = new Deferred();
      var field = null,
        paramInputs = null;
      param.inputId = filterLayer.id + "." + param.parameterId + ".value";

      array.some(fields, function(f) {
        if (f.name === param.fieldName) {
          field = f;
          return true;
        }
      });
      if (field && field.domain && field.domain.codedValues) {
        paramInputs = this._createDropdownList(param, field.domain.codedValues);
        deferred.resolve(paramInputs);
      } else if (field && field.type === "esriFieldTypeInteger") { //the pattern forces the numeric keyboard on iOS. The numeric type works on webkit browsers only
        paramInputs = lang.replace("<input class='param_inputs'  type='number'  id='{inputId}' pattern='[0-9]*'  value='{defaultValue}' />", param);
        deferred.resolve(paramInputs);
      } else { //string
        var capabilities = filterLayer.advancedQueryCapabilities;
        if (capabilities.supportsDistinct && this.uniqueVals) {
          var distinctQuery = new Query();
          distinctQuery.where = "1=1";
          distinctQuery.orderByFields = [field.name];
          distinctQuery.returnGeometry = false;
          distinctQuery.outFields = [field.name];
          distinctQuery.returnDistinctValues = true;

          var qt = new QueryTask(filterLayer.url);
          qt.execute(distinctQuery, lang.hitch(this, function(results) {
            var values = results.features.map(function(f, index) {
              return {
                name: f.attributes[field.name],
                code: f.attributes[field.name]
              };
            });
            var container = this._createDropdownList(param, values);
            deferred.resolve(container);
          }), function(error) {
            deferred.resolve(error);
          });
        } else {
          // string
          paramInputs = lang.replace("<input class='param_inputs'  type='text'  id='{inputId}' value='{defaultValue}' />", param);
          deferred.resolve(paramInputs);
        }
      }
      return deferred.promise;
    },‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

And here is my version of _createDropdownlist function, which sets up the drop down.

_createDropdownList: function(param, values) {
      
      var container = domConstruct.create("div", {
       className: "styled-select small" 
      });

      // Modify select to utilize Dojo - Dijit FilteringSelect Widget

      var select = domConstruct.create("select", {
        dojotype: "dijit/form/FilteringSelect",
        id: param.inputId 
      }, container);

      array.forEach(values, function(val, index) {
        domConstruct.create("option", {
          value: val.code,
          innerHTML: val.name,
          selected: (val.name === param.defaultValue) ? true : false
        }, select);
      });
      var node = container.outerHTML ? container.outerHTML : container.innerHTML;
      console.log("node " + node);      
      return node;
    },‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

I have added line 10 above to manipulate the select element to become a FliteringSelect.

dojotype: "dijit/form/FilteringSelect",‍

To my surprise, this worked for the coded value layers. But not string type.

Here's a screenshot of the filterable layers:

The first (Admit by Diagnosis) is the Dijit with autocomplete.

The Second (Plan Name) is just a simple drop down.

Anyone familiar with this template - any ideas why this might be happening? And how I can leverage the existing template code for string types?

Re: Interactive Filter Template - Replacing Default Dropdown with Dijit FilteringSelect

RobertScheitlin__GISP — Sat, 11 Dec 2021 08:23:55 GMT

Marissa,

Well this one was difficult to track down but the issue with strings is the delay in the roundtrip to the server to get unique values for the sting is to long and the dom is already rendered as a standard select element.

So here is code to force a FilteringSelect using a timeout to delay the programattic creation of the FilteringSelect:

Note there are new classes added to the define on line 1 and 2 as well as my commented code changes for _createDropdownList

define(["dojo/_base/declare", "dojo/_base/array", "dojo/_base/lang", "dojo/_base/kernel", "dojo/number", "dojo/dom", "dojo/query", "dojo/dom-construct", "dojo/dom-style", "dojo/dom-class", "dojo/Deferred", "dojo/promise/all", "dojo/ready", "dojo/request/script", "dojo/Stateful", "dojo/string", "dojo/Evented", "dojo/i18n!application/nls/resources", "dojo/on", "esri/request", "esri/tasks/query", "esri/tasks/QueryTask", "dijit/form/FilteringSelect", "dojo/store/Memory", "dijit/registry", "dojo/domReady!"], function(
  declare, array, lang, dojo, number, dom, dojoQuery, domConstruct, domStyle, domClass, Deferred, all, ready, script, Stateful, string, Evented, i18n, on, esriRequest, Query, QueryTask, FilteringSelect, Memory, registry) {
  return declare("application.Filter", [Stateful, Evented], {
    options: {
      map: null,
      layers: [],
      filterLayers: [],
      filterDropdown: null,
      button_text: null,
      webmap: null,
      displayClear: false,
      dislayZoom: false,
      filterOnLoad: false,
      filterInstructions: null,
      uniqueVals: false
    },
    constructor: function(options) {
      // mixin options
      var defaults = lang.mixin({}, this.options, options);
      // properties
      this.set("map", defaults.map);
      this.set("layers", defaults.layers);
      this.set("filterDropdown", defaults.dropdown);

      // private vars
      this._deferreds = [];
      this._events = [];


      // map required
      if (!this.map) {
        console.log("Filter::Reference to esri.Map object required");
        return;
      }

      // dom ready
      ready(lang.hitch(this, function() {
        // query when map loads
        if (this.map.loaded) {
          this._init();
        } else {
          var onLoad = on.once(this.map, "load", lang.hitch(this, function() {
            this._init();
          }));
          this._events.push(onLoad);
        }
        // loaded
        this.set("loaded", true);
        this.emit("load", {});
      }));
    },
    destroy: function() {
      // remove events
      if (this._events && this._events.length) {
        for (var i = 0; i < this._events.length; i++) {
          this._events[i].remove();
        }
      }
    },
    _init: function() {},
    createFilterContent: function() {
      var deferred = new Deferred();
      this._filterLayers();
      all(this.filterLayers).then(lang.hitch(this, function(response) {
        var layers = []; /*If there are interactive filters build the filter display*/
        array.forEach(response, lang.hitch(this, function(r, index) {
          layers.push(r);
        }));
        this.layers = layers;
        var content;
        if (layers.length > 0) {
          content = this._buildFilterDialog(layers);
        } else {
          var noFilterText = string.substitute(i18n.viewer.filterNo, {
            "link": "<a target='_blank' href='" + i18n.viewer.filterLink + "'>" + i18n.viewer.filterLink + "</a>"
          });
          content = "<div style='padding:8px;'>" + noFilterText + "</div>";
        }
        deferred.resolve(content);


      }));
      return deferred.promise;

    },
    _filterLayers: function() {
      var filterLayers = [];
      array.forEach(this.layers, lang.hitch(this, function(layer) {
        if (layer.definitionEditor) {
          filterLayers.push(this._getLayerFields(layer));
        } else if (layer.layers) {
          //Check ArcGISDynamicMapService layers for filters
          array.forEach(layer.layers, lang.hitch(this, function(sublayer) {
            if (sublayer.definitionEditor) {
              sublayer.title = layer.title;
              sublayer.layerId = layer.id;
              filterLayers.push(this._getLayerFields(sublayer));
            }
          }));
        } else if (layer.layerDefinition && layer.itemId) {
          //is there an associated item in the web map response
          if (this.webmap.itemInfo && this.webmap.itemInfo.relatedItemsData && this.webmap.itemInfo.relatedItemsData[layer.itemId]) {
            var item = this.webmap.itemInfo.relatedItemsData[layer.itemId];
            if (item.definitionEditor) {
              layer.definitionEditor = item.definitionEditor;
              filterLayers.push(this._getLayerFields(layer));
            }
          }
        }
      }));
      this.filterLayers = filterLayers;
      return filterLayers;
    },
    _stopIndicator: function(layer) {
      domClass.remove("filterLoad", "filter-loading");
    },
    _startIndicator: function() {
      domClass.add("filterLoad", "filter-loading");
    },
    _createDefinitionExpression: function(layer) {
      this._startIndicator();
      //get the input values to the filter - if not value is specified use the defaults
      var values = [];
      array.forEach(layer.definitionEditor.inputs, lang.hitch(this, function(input) {

        array.forEach(input.parameters, lang.hitch(this, function(param) {

          var widget_id = layer.id + "." + param.parameterId + ".value";
          var widget = dom.byId(widget_id);
          var value = widget.value;

          //is it a number
          var defaultValue = isNaN(param.defaultValue) ? param.defaultValue : number.parse(param.defaultValue);
          if (isNaN(value)) {
            values.push((value === "") ? defaultValue : value);
          } else {
            if (value === "") {
              values.push((value === "") ? defaultValue : value);
            } else {
              values.push(value);
            }
          }
        }));
      }));
      var defExp = lang.replace(layer.definitionEditor.parameterizedExpression, values);
      this._applyDefinitionExpression(layer, defExp);
    },
    _applyDefinitionExpression: function(layer, defExp) {
      // if toggleFilterVisibility is true then hide all layers except currently visible layer.
      if (this.toggleFilterVisibility) {
        this._setFilterVisibility(layer);
      }
      //Apply the filter
      if (layer.layerType && layer.layerType === "ArcGISStreamLayer") {
        layer.layerObject.setDefinitionExpression(defExp);
      } else if (layer.layerObject) { //Image Service, Stream layer or Feature Layer
        if (layer.definitionEditor || (layer.layerObject.type && layer.layerObject.type === "Feature Layer")) {
          on.once(layer.layerObject, "update-end", lang.hitch(this, function() {
            this._stopIndicator();
          }));
          layer.layerObject.setDefinitionExpression(defExp);
        }
      } else if (layer.layerId) { //dynamic layer
        var layerDef = [];
        layerDef[layer.id] = defExp;
        var mapLayer = this.map.getLayer(layer.layerId);
        mapLayer.setLayerDefinitions(layerDef);
        this._stopIndicator();
      }
    },
    _setFilterVisibility: function(visLayer) {
      if (this.layers) {
        array.forEach(this.layers, lang.hitch(this, function(layer) {
          if (visLayer.id === layer.id) {
            this._setLayerVisibility(layer, true);
          } else {
            this._setLayerVisibility(layer, false);
          }
        }));
      }
    },
    _setLayerVisibility: function(layer, vis) {
      if (layer && layer.layerType) {
        if (layer.layerType === "ArcGISFeatureLayer" && layer.layerObject) {
          layer.layerObject.setVisibility(vis);
        } else if (layer.layerType == "ArcGISFeatureLayer" && layer.hasOwnProperty("setVisibility")) {
          layer.setVisibility(vis);
        }
      } else {
        if (vis) {
          var dynLayer = this.map.getLayer(layer.layerId);
          dynLayer.setVisibleLayers([layer.id]);
        }
      }

    },
    _addFilter: function(layer) {
      var deferred = new Deferred();
      var content = domConstruct.create("div");
      array.forEach(layer.definitionEditor.inputs, lang.hitch(this, function(input) {
        domConstruct.create("label", {
          innerHTML: input.prompt
        }, content); //add prompt text to panel
        var pcontent = domConstruct.create("div", {
          className: "row"
        }, content);
        var filterLayer = (layer.layerObject) ? layer.layerObject : layer;
        var fields = (layer.layerObject) ? layer.layerObject.fields : layer.fields;
        var params = [];
        array.forEach(input.parameters, lang.hitch(this, function(param, index) {
          var paramDef = new Deferred();
          this._createFilterField(param, filterLayer, fields).then(function(paramResults) {
            if (index < input.parameters.length - 1) {
              //insert an AND into the expression
              paramResults += " <div class='connector'> AND</div> ";
            }
            domConstruct.place(paramResults, pcontent);
            paramDef.resolve();
            return paramDef.promise;
          });
          params.push(paramDef);
        }));
        all(params).then(lang.hitch(this, function() {
          domConstruct.create("label", {
            className: "hint",
            innerHTML: input.hint
          }, content); //add  help tip for inputs
          domConstruct.create("div", {
            className: "clearBoth"
          }, content);
          deferred.resolve(content);
        }), function(error) {
          deferred.resolve(error);
        });
      }));
      return deferred.promise;
    //return content;
    //create a label and input for each filter param
    },
    _createFilterField: function(param, filterLayer, fields) {
      var deferred = new Deferred();
      var field = null,
        paramInputs = null;
      param.inputId = filterLayer.id + "." + param.parameterId + ".value";

      array.some(fields, function(f) {
        if (f.name === param.fieldName) {
          field = f;
          return true;
        }
      });
      if (field && field.domain && field.domain.codedValues) {
        paramInputs = this._createDropdownList(param, field.domain.codedValues);
        deferred.resolve(paramInputs);
      } else if (field && field.type === "esriFieldTypeInteger") { //the pattern forces the numeric keyboard on iOS. The numeric type works on webkit browsers only
        paramInputs = lang.replace("<input class='param_inputs'  type='number'  id='{inputId}' pattern='[0-9]*'  value='{defaultValue}' />", param);
        deferred.resolve(paramInputs);
      } else { //string
        var capabilities = filterLayer.advancedQueryCapabilities;
        if (capabilities && capabilities.supportsDistinct && this.uniqueVals) {
          var distinctQuery = new Query();
          distinctQuery.where = "1=1";
          distinctQuery.orderByFields = [field.name];
          distinctQuery.returnGeometry = false;
          distinctQuery.outFields = [field.name];
          distinctQuery.returnDistinctValues = true;

          var qt = new QueryTask(filterLayer.url);
          qt.execute(distinctQuery, lang.hitch(this, function(results) {
            var values = results.features.map(function(f, index) {
              return {
                name: f.attributes[field.name],
                code: f.attributes[field.name]
              };
            });

            paramInputs = this._createDropdownList(param, values);
            //console.info(container);
            deferred.resolve(paramInputs);
          }), function(error) {
            deferred.resolve(error);
          });
        } else {
          // string
          paramInputs = lang.replace("<input class='param_inputs'  type='text'  id='{inputId}' value='{defaultValue}' />", param);
          deferred.resolve(paramInputs);
        }
      }
      return deferred.promise;
    },
    _createDropdownList: function(param, values) {
        var container = domConstruct.create("div", {
          className: "styled-select small"
        });

        // Modify select to utilize Dojo - Dijit FilteringSelect Widget
        var select = domConstruct.create("select", {
          dojoType: "dijit/form/FilteringSelect",
          id: param.inputId
        }, container);

//Workaround for setting the string type values to a filtering select
        setTimeout(lang.hitch(this, function(){
          var sel = dom.byId(param.inputId);
          var vals = [];
          array.forEach(values, function(val, index) {
            vals.push({
              value: val.code,
              label: val.name,
              selected: (val.name === param.defaultValue) ? true : false
            })
          });

          var dStore = new Memory({
                           idProperty: "label",
                           data: vals
                      });

          var select = new FilteringSelect({
            id: param.inputId,
            strore: dStore
          }, sel).startup();
        }), 500);
//end

        array.forEach(values, function(val, index) {
          domConstruct.create("option", {
            value: val.code,
            innerHTML: val.name,
            selected: (val.name === param.defaultValue) ? true : false
          }, select);
        });
        var node = container.outerHTML ? container.outerHTML : container.innerHTML;
        return node;
    },
    _getLayerFields: function(layer) {
      var deferred = new Deferred();
      if (layer.layerObject) {
        deferred.resolve(layer);
      } else if (layer.layerId) {
        var l = this.map.getLayer(layer.layerId);
        esriRequest({
          url: l.url + "/" + layer.id,
          content: {
            "f": "json"
          },
          callbackParamName: "callback"
        }).then(lang.hitch(this, function(response) {
          layer.fields = response.fields;
          deferred.resolve(layer);
        }));
      }
      return deferred.promise;
    },
    _buildFilterDialog: function(layers) {

      //If only one layer has a filter then display it.
      //If multiple layers have a filter create a dropdown then show/hide the filters.
      // Build the filter dialog including explanatory text and add a submit button for each filter group.
      var filterContainer = domConstruct.create("div", {
        id: "container",
        className: i18n.isRightToLeft ? "esriRtl" : "esriLtr",
        innerHTML: this.filterInstructions || i18n.viewer.filterInstructions
      });
      if (this.filterDropdown) {
        if (layers.length && layers.length > 1) {
          var selectContainer = domConstruct.create("div", {
            className: "styled-select"
          }, filterContainer);
          var select = domConstruct.create("select", {
            className: "layerList"
          }, selectContainer);

          var options = select.options;
          options.length = 0;
          array.forEach(layers, function(val, index) {
            options[index] = new Option(val.name || val.title, index);
          });
          on(select, "change", function() {
            var value = select.value;
            //Show the selected filter
            dojoQuery(".filter").forEach(lang.hitch(this, function(node) {
              if (node.id === "filter_" + value) {
                domStyle.set(node, "display", "block");
              } else {
                domStyle.set(node, "display", "none");
              }
            }));

          });
        }
      }

      array.forEach(layers, lang.hitch(this, function(layer, index) { //add a list item for each layer and add the filters
        var filterGroup = domConstruct.create("div", {
          className: "filter",
          id: "filter_" + index
        }, filterContainer);
        //hide all filters except the first if displayed in a dropdown
        if (this.filterDropdown && index > 0) {
          domStyle.set(filterGroup, "display", "none");
        }

        if (this.filterDropdown === false) {
          domConstruct.create("legend", {
            innerHTML: "<span>" + layer.title + "</span>"
          }, filterGroup);
        } else if (this.filterDropdown && layers.length === 1) {
          domConstruct.create("legend", {
            innerHTML: "<span>" + layer.title + "</span>"
          }, filterGroup);
        }
        //add friendly text that explains the query - first get parameter inputs then update the expression
        var exp = layer.definitionEditor.parameterizedExpression;
        var infoText = "";
        if (exp.indexOf("OR") !== -1) {
          infoText = i18n.viewer.filterOr;
        } else if (exp.indexOf("AND") !== -1) {
          infoText = i18n.viewer.filterAnd;
        }

        domConstruct.create("div", {
          className: "instructions",
          innerHTML: infoText
        }, filterGroup);


        var results = this._addFilter(layer);
        results.then(lang.hitch(this, function(results) {
          domConstruct.place(results, filterGroup);

          //add an apply button to the layer filter group
          var b = domConstruct.create("input", {
            type: "button",
            className: "submitButton bg fc",
            id: layer.id + "_apply",
            value: this.button_text || i18n.viewer.button_text
          }, filterGroup, "last");



          if (this.displayClear) {

            var clear = domConstruct.create("span", {
              className: "cancelButton icon-cancel",
              id: layer.id + "_clear",
              title: "Clear" //i18n.viewer.clear_text
            }, filterGroup);
            on(clear, "click", lang.hitch(this, function() {
              if (layer.layerType && layer.layerType === "ArcGISStreamLayer") {
                layer.clear();
              } else {
                this._applyDefinitionExpression(layer, null);
              }
              if (this.map.infoWindow.isShowing) {
                this.map.infoWindow.hide();
              }
            }));

          }

          //only valid for hosted feature layers.
          if (this.displayZoom) {
            if (layer.layerObject && layer.layerObject.type && layer.layerObject.type === "Feature Layer" && layer.layerObject.url && this._isHosted(layer.layerObject.url)) {
              var zoom = domConstruct.create("span", {
                className: "zoomButton icon-search",
                id: layer.id + "_zoom",
                title: "Zoom"
              }, filterGroup);
              on(zoom, "click", lang.hitch(this, function() {
                this._zoomFilter(layer);
              }));
            }
          }


          //clear the default filter if config option is set
          if (this.filterOnLoad === false) {
            this._applyDefinitionExpression(layer, null);

          }

          on(b, "click", lang.hitch(this, function() {
            this._startIndicator();
            this._createDefinitionExpression(layer);

          }));
        }));


      }));

      return filterContainer;

    },
    _isHosted: function(url) {
      var services = "//services";
      var features = "//features";

      return (url.indexOf(services) !== -1 || url.indexOf(features) !== -1);

    },
    _zoomFilter: function(layer) {
      //only zoom for hosted feature layers
      if (!this._isHosted(layer.layerObject.url)) {
        return;
      }
      this._startIndicator();
      if (layer.layerObject && layer.layerObject.type && layer.layerObject.type === "Feature Layer") {
        var whereClause = layer.layerObject.getDefinitionExpression() || "1=1";
        var q = new Query();
        q.where = whereClause;

        var qt = new QueryTask(layer.layerObject.url);
        qt.executeForExtent(q, lang.hitch(this, function(result) {
          if (result.extent) {
            this.map.setExtent(result.extent, true);
            this._stopIndicator();
          }
        }), function(error) {
          this._stopIndicator();
        });

      }
    }
  });
});
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Re: Interactive Filter Template - Replacing Default Dropdown with Dijit FilteringSelect

MarissaWalter — Sat, 11 Dec 2021 08:23:58 GMT

Thanks so much Robert, that worked!

However, it caused some display issues with my other (coded value type) FilteringSelect widget.

It was still filtering on the map, but it was no longer allowing text input and the selected value would not display in the box. I'm guessing something with the timeout?

Not sure if this is the ideal solution/good code practice, but I duplicated the original _createDropdownList, renamed to _createDropdownListCodedVals, and changed the call within _createFilterField:

  _createDropdownListCodedVals: function(param, values) {
      
      var container = domConstruct.create("div", {
       className: "styled-select small" 
      });

      // Modify select to utilize Dojo - Dijit FilteringSelect Widget

      var select = domConstruct.create("select", {
        dojotype: "dijit/form/FilteringSelect",
        id: param.inputId 
      }, container);

      array.forEach(values, function(val, index) {
        domConstruct.create("option", {
          value: val.code,
          innerHTML: val.name,
          selected: (val.name === param.defaultValue) ? true : false
        }, select);
      });
      var node = container.outerHTML ? container.outerHTML : container.innerHTML;
      console.log("node " + node);      
      return node;
    },‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

_createFilterField:

if (field && field.domain && field.domain.codedValues) {
        paramInputs = this.__createDropdownListCodedVals(param, field.domain.codedValues);
        deferred.resolve(paramInputs);
      }‍‍‍‍

This fixed the problem, but please let me know if there is a better way to resolve this. Thanks again!

Re: Interactive Filter Template - Replacing Default Dropdown with Dijit FilteringSelect

RobertScheitlin__GISP — Sat, 11 Dec 2021 08:24:02 GMT

Marissa,

A more optimized solution would be:

    _createFilterField: function(param, filterLayer, fields) {
      var deferred = new Deferred();
      var field = null,
        paramInputs = null;
      param.inputId = filterLayer.id + "." + param.parameterId + ".value";

      array.some(fields, function(f) {
        if (f.name === param.fieldName) {
          field = f;
          return true;
        }
      });
      if (field && field.domain && field.domain.codedValues) {
        paramInputs = this._createDropdownList(param, field.domain.codedValues, false);
        deferred.resolve(paramInputs);
      } else if (field && field.type === "esriFieldTypeInteger") { //the pattern forces the numeric keyboard on iOS. The numeric type works on webkit browsers only
        paramInputs = lang.replace("<input class='param_inputs'  type='number'  id='{inputId}' pattern='[0-9]*'  value='{defaultValue}' />", param);
        deferred.resolve(paramInputs);
      } else { //string
        var capabilities = filterLayer.advancedQueryCapabilities;
        if (capabilities && capabilities.supportsDistinct && this.uniqueVals) {
          var distinctQuery = new Query();
          distinctQuery.where = "1=1";
          distinctQuery.orderByFields = [field.name];
          distinctQuery.returnGeometry = false;
          distinctQuery.outFields = [field.name];
          distinctQuery.returnDistinctValues = true;

          var qt = new QueryTask(filterLayer.url);
          qt.execute(distinctQuery, lang.hitch(this, function(results) {
            var values = results.features.map(function(f, index) {
              return {
                name: f.attributes[field.name],
                code: f.attributes[field.name]
              };
            });

            paramInputs = this._createDropdownList(param, values, true);
            //console.info(container);
            deferred.resolve(paramInputs);
          }), function(error) {
            deferred.resolve(error);
          });
        } else {
          // string
          paramInputs = lang.replace("<input class='param_inputs'  type='text'  id='{inputId}' value='{defaultValue}' />", param);
          deferred.resolve(paramInputs);
        }
      }
      return deferred.promise;
    },
    _createDropdownList: function(param, values, isString) {
        var container = domConstruct.create("div", {
          className: "styled-select small"
        });

        // Modify select to utilize Dojo - Dijit FilteringSelect Widget
        var select = domConstruct.create("select", {
          dojoType: "dijit/form/FilteringSelect",
          id: param.inputId
        }, container);

//Workaround for setting the string type values to a filtering select
        if(isString){
          setTimeout(lang.hitch(this, function(){
            var sel = dom.byId(param.inputId);
            var vals = [];
            array.forEach(values, function(val, index) {
              vals.push({
                value: val.code,
                label: val.name,
                selected: (val.name === param.defaultValue) ? true : false
              })
            });

            var dStore = new Memory({
                             idProperty: "label",
                             data: vals
                        });

            var select = new FilteringSelect({
              id: param.inputId,
              strore: dStore
            }, sel).startup();
          }), 500);
        }
//end

        array.forEach(values, function(val, index) {
          domConstruct.create("option", {
            value: val.code,
            innerHTML: val.name,
            selected: (val.name === param.defaultValue) ? true : false
          }, select);
        });
        var node = container.outerHTML ? container.outerHTML : container.innerHTML;
        return node;
    },‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: Interactive Filter Template - Replacing Default Dropdown with Dijit FilteringSelect

RobertScheitlin__GISP — Mon, 31 Oct 2016 15:45:18 GMT

Don't forget to mark this question as answered by clicking on the "Correct Answer" link on the reply that answered your question.