Latest Contributions by BlairJones

ArcGIS API 4.6;  I want to create user interface elements within a legend.  There seems to be no ESRI methods for this, so I am trying to capture the document elements created by the legend widget.  I want a static legend. First I create a number of FeatureLayer with empty source features array.   I add these to a map and create the legend.  Next, I want to copy the innerHTML of the document element containing legend and finally destroy the legend and remove all FeatureLayer.  From the copy I can construct my version of legend. My problem is event timing.  Is there a deterministic method to signal complete construction of new esriLegend in the DOM?  I have tried watchUtil.when(legend,"container") property, but I cant find a method to use with dojo/aspect.after. What works is to invoke esriLegend then use setTimeout(), set for a few hundred miliseconds, at which point I can copy the completed DOM element and destroy the legend. Please suggest a better way! Thanks, Blair //  makeLegend.js    May 22, 2018    abj3 if (!window.VaFWIS) { window.VaFWIS = {}; } if (!VaFWIS.lib) { VaFWIS.lib = {}; } require([     "esri/layers/FeatureLayer",     "esri/widgets/Legend" ], function (FeatureLayer, esriLegend) {         VaFWIS.lib.makeLegend = function () { // esri/widgets/legend creates a dynamic symbol legend connected to map featureLayers // VaFWIS.lib.makeLegend - make an esriLegend and copy DOM element as a static legend //  1) map.add featureLayers created from VaFWIS.layerDef having layerInfo //  2) define legend info //  3) invoke esri/widgets/legend which dynamically inserts HTML into "theLegend" //  4) save  "theLegendContainer" innerHTML //  5) destroy legend //  6) map.remove featureLayers //  7) restore saved "theLegendContainer" innerHTML //  😎 (future) add legend item specific ui controls //      a) re-order layers by dragging //      b) change opacity             var legendLayerInfos = [];             var keys = Object.keys(VaFWIS.layerDef);             for (var k = 0; k < keys.length; k++) {                 var layerDef = VaFWIS.layerDef[keys ];                 if (layerDef.layerInfo) {                     if (VaFWIS.debug == true) {                         console.log("makeLegend for " + layerDef.id);                     }                     var featureLayer = FeatureLayer(                         {                             "fields": layerDef.layerInfo.fields                             , "geometryType": layerDef.layerInfo.geometryType                             , "id": "theLegend_" + layerDef.id                             , "objectIdField": layerDef.layerInfo.objectIdField                             , "popupTemplate": layerDef.layerInfo.popupTemplate                             , "renderer": layerDef.layerInfo.renderer                             , "spatialReference": layerDef.layerInfo.spatialReference                             , "source": []                             , "visible": true                         }                     );                     VaFWIS.map.add(featureLayer);                     legendLayerInfos.push(                         {                             "layer": featureLayer                             , title: layerDef.title                         });                 }             }             // construct legend; after scheduleRenderer then save HTML and destroy legend             legend = new esriLegend(                 {                     view: VaFWIS.mapView,                     container: "theLegend",                     layerInfos: legendLayerInfos                 }             );             setTimeout(function (legend) {                 var containerContent = $("#theLegendContainer").html();                 legend.destroy();                 VaFWIS.map.removeMany(VaFWIS.map.layers.filter(                     function (lyr) {                         return lyr.id.indexOf("theLegend_") == 0;                     }                 ));                 $("#theLegendContainer").html(containerContent);                 $("#theLegendContainer").css("visibility", "visible");             }.bind(null, legend), 250);         }     }); ... View more

I have a feature layer depicting many locations of wildlife collection efforts.   I have a table of species codes observed for each effort.  I have a table of characteristic codes assigned to each species code.  Each effort can identify many different critters.  Each critter has been assigned several codes from a list of characteristics. Using https://js.arcgis.com/3.20/ . If ArcGIS used standard SQL, I would be able to use Join in my Where clause to query and select effort features based on species code and/or characteristic codes; but in reading the documentation for QueryTask Where, it seems JOIN is not supported.  Have I misunderstood?  What is the best practice method, using ArcGIS JavaScript API, to query using SQL Join to a feature attribute? ... View more

esri.config.defaults.io.timeout I have many sources with most completing under 20 seconds.  But one or two can take close to 150 seconds. When I change esri.config.defaults.io.timeout to 150000 before a long task and then set esri.config.defaults.io.timeout to 20000 for a short task, the long task throws timeout error at 20 seconds. Is there a method to set io timeout for indiviual tasks? Thanks, Dinosaur Blair ... View more

I'm using V3.13 geometryEngine to buffer from activateDrawTool on a esri-web-mercator image.  Because my project is low precision, I want to reduce the number of vertices in the returned polygon.  I have employed geometryEngine.generalize on the result. Question 1 - are there properties of some object I can set to have geometryEngine.geodesicBuffer return a generalized geometry? Question 2 - concerning maxDeviation - if I use 10.0 does this mean a resulting vertice will be within + or - 10 esri-web-mercator units from where it should be? ... View more

I'm still loosing sleep over my ArcGIS JavaScript application and why it does not work with IE 10 / 11.  I have CORS enable my server, which seems to work with everything not ArcGIS and works with for ArcGIS showing feature layers on a map, but not for queryTask directed at the same feature layer. I have the JavaScript directive, though not supposed to be needed: // where getTokenURL="https://some.domain.gov/arcgis/tokens" esri.config.defaults.io.corsEnabledServers.push(getTokenURL.split("/")[3]); Everything works properly in Firefox, Chrome, and Opera.  But in  IE10 my $.getJSON CORS request works well, the map loads and displays images as expected.  When I execute a queryTask the nework trafic monitor shows a request being made through PROXY instead of a CORS request.  Firefox, Chrome network monitors show CORS requests for the same event. My authorization token is valid for the Client IP address, not valid for the PROXY IP; things go wrong. My question is, have I missed something I need to do or does ArcGIS 10.2 queryTask not support IE 10 / 11 CORS ? Good health! Blair ... View more