How to know which dynamc map service the visible layer cam from in Nliu's TC widget

Question

I am using Nliu's TC widget in my application, it is great.  When I used the identifyTask to get the info for the visible layers, I could only identify layers from one map service. I used the code as following.

identifyParameters.layerIds =  dynamicMapServiceLayer.visibleLayers;

It seems I have to manually assigned which map service I am going to use. I have multiple map services show in the TOC. Is there a way could know that which map service the visible layer belong to?

Thanks

Zhujing

YungKaiChin · Answer

I know nothing about the widget, but I can think of a possible solution/walkaround.

1. Create an Array of all layers (IDs) used by the widgets.

2. When needed, loop through the array, and find what is visible (layer.visible || layer.visibleAtMapScale);

AhmadRaji_0-1640973022601.png

ZhujingXia · Answer

if i add this code into  function doIdentify(evt)

var layers = dojo.map(map.layerIds, function (layerId) {

return map.getLayer(layerId);

});  //I could get result back for layers

var layers = dojo.map(map.layerIds, function (layerId) {

return map.getLayer(layerId);

});  //But I run into error for this code , no result for layer, the layer is undefined.

ZhujingXia · Answer

I have a big project, here is my identfy.js file It could only identify one map service. var map_click_handle_Identify; //event procedure for map-onClick var map_identify_first_time = true; var mapClickX = 0; var mapClickY = 0; var identifyTreeDisplayData = []; var selectedFeature; var myFeatureScroll; var myIdentifyScroll; //Identify tool function initIdentifyTool() { //currently nothing needs to be initialized } function setActiveToolIdentify() { //attach identify tool to map click event map_click_handle_Identify = dojo.connect(map, "onClick", doIdentify); map.setMapCursor("crosshair"); } function ShowIdentifyPanel() { $('#identifywindow').dialog({ title: "Map Identify Tool", show: { effect: "fade", duration: 250 }, hide: , modal: false, //position: , height: 320, width: 470, resizable: true, closeOnEscape: false, close: function () { }, resize: function (event, ui) { var fpwidth = $("#identifywindow_featurepanel_wrapper").width(); $("#identifywindow_attributepanel").css({ "left": String(fpwidth + 10) + "px", "width": "auto" }); //update iscroll $("#identifywindow_featurepanel").css({ "min-height": String($("#identifywindow_featurepanel_wrapper").height()) + "px" }); myFeatureScroll.refresh(); $("#scroller").css({ "min-height": String($("#wrapper").height() + 3) + "px" }); myIdentifyScroll.refresh(); } }); if (map_identify_first_time) { //set window position on first time only $('#identifywindow').dialog({ position: { my: "right top", at: "right-25 top+100", collision: "flipfit"} }); map_identify_first_time = false; } } //capture map click event - select parcel var lastCalledIdentifyTimestamp = new Date(); function doIdentify(evt) { var thisCallTimestamp = new Date(); dmsg(thisCallTimestamp - lastCalledIdentifyTimestamp); if ((thisCallTimestamp - lastCalledIdentifyTimestamp) < 500) { //on mobile, screen touch may fire up twice - use timer to eliminate the second request just in case lastCalledIdentifyTimestamp = thisCallTimestamp; return; } lastCalledIdentifyTimestamp = thisCallTimestamp; mapClickX = evt.mapPoint.x; mapClickY = evt.mapPoint.y; if (cfg_multiLayerIdentifyToolEnabled == 1 || cfg_featureToolEnabled == 1) { dmsg('5.1 on map clicked'); showLoading(); map.graphics.clear(); if (cfg_multiLayerIdentifyToolEnabled == 1) { require(["esri/tasks/IdentifyTask", "esri/tasks/IdentifyParameters"], function (IdentifyTask, IdentifyParameters) { ShowIdentifyPanel(); //alert('not implemented'); if (map.getScale() > cfg_identifyMinScale) { jsapimessage("Please zoom in closer."); hideLoading(); return; } var identifyParameters = new IdentifyParameters(); identifyParameters.geometry = evt.mapPoint; identifyParameters.returnGeometry = true; identifyParameters.mapExtent = map.extent; identifyParameters.height = map.height; identifyParameters.width = map.width; identifyParameters.spatialReference = map.spatialReference; //identifyParameters.layerOption = IdentifyParameters.LAYER_OPTION_VISIBLE; //this will take default visible layers from MXD, ignoring current state in the TOC control identifyParameters.layerOption = IdentifyParameters.LAYER_OPTION_ALL; identifyParameters.layerIds = dynamicMapServiceLayer.visibleLayers; identifyParameters.tolerance = cfg_identifyTolerance; if (cfg_tocEnabled == 1) { //if toc control is enabled, the default visibility may have changed, the option LAYER_OPTION_VISIBLE may not represent currrent visible layers //identifyParameters.layerIds = map.getLayer("dynamicmap").visibleLayers; } var identifyServer = cfg_identifyServerURL.checkAppendToken(); var identifyTask = new IdentifyTask(identifyServer); identifyTask.execute(identifyParameters, function (idResults) { processIdentifyResult(idResults, evt); }, identifyError); }); } else if (cfg_featureToolEnabled == 1) { require(["esri/tasks/QueryTask", "esri/tasks/query", "esri/symbols/SimpleFillSymbol", "esri/symbols/SimpleLineSymbol"], function (QueryTask, Query, SimpleFillSymbol, SimpleLineSymbol) { var queryServer = (cfg_queryServerURL + "/" + kv[cfg_featureToolLayerName.toUpperCase()].toString()).checkAppendToken(); var queryTask = new QueryTask(queryServer); var query = new Query(); query.returnGeometry = true; query.outFields = ["*"]; query.geometry = evt.mapPoint; query.spatialRelationship = Query.SPATIAL_REL_INTERSECTS; queryTask.execute(query, function (featureSet) { if (featureSet.features.length == 0) { jsapimessage("Nothing is selected."); hideLoading(); } else { //get feature var graphic = featureSet.features[0]; //setup graphic layer and symbol map.graphics.clear(); var symbol = new SimpleFillSymbol(SimpleFillSymbol.STYLE_NULL, new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID, new dojo.Color(), 4), new dojo.Color()); //add graphic to map graphic.setSymbol(symbol); map.graphics.add(graphic); //get extent var ext var geometry = graphic.geometry; var ext = getExtentFromGeometry(geometry); var featurekey = graphic.attributes[cfg_featureToolLayerKeyField]; executeFeatureFunction(featurekey); hideLoading(); } }); }); } dmsg('5.2 on map clicked done'); } else { alert("Identify tool and/or feature tool has not been configured for this application."); } } function identifyError(error) { hideLoading(); alert('There was an error executing identify task. ' + error.get_message()); } function processIdentifyResult(idResults, evt) { //array variable to hold all known layer names var layerNameList = []; //reset result object, create root node identifyTreeDisplayData.length = 0; identifyTreeDisplayData.push({ id: "Identify Layers", name: "Layer Name", features: "" }) //clear existing content in attribute pabel $("#identifywindow_featurepanel").html(""); //check if identify result contains any feature if (idResults.length == 0) { $("#identifywindow_featurepanel").html(" No features found. "); hideLoading(); return; } for (var i = 0, il = idResults.length; i < il; i++) { idResult = idResults; if (layerNameList.length == 0 || layerNameList.indexOf(idResult.layerName) == -1) { //check if we need to insert a new layer node layerNameList.push(idResult.layerName); //add this layer to list of known layer identifyTreeDisplayData.push({ id: idResult.layerName, name: idResult.layerName, features: "", parent: "Identify Layers" }); //insert layer node into identifyTreeDisplayData } identifyTreeDisplayData.push(); //insert feature into identifyTreeDisplayData } require([ "dojo/_base/window", "dojo/store/Memory", "dijit/tree/ObjectStoreModel", "dijit/Tree", "dojo/domReady!"], function (win, Memory, ObjectStoreModel, Tree) { var identifyStore = new Memory({ data: identifyTreeDisplayData, getChildren: function (object) { return this.query({ parent: object.id }); //return all elements in which element.parent = this-object.id } }); var identifyModel = new ObjectStoreModel( }); //clear out existing identify tree object var oldtree = dijit.byId('identifyTree'); if (oldtree) { oldtree.destroy(); } var identifyTree = new Tree(, autoExpand: true, onClick: identifyTreeOnClick, style: "overflow: hidden;" }); identifyTree.placeAt("identifywindow_featurepanel").startup(); identifyTree.on("load", function () { if (myFeatureScroll != null) { myFeatureScroll.refresh(); } else { myFeatureScroll = new iScroll('identifywindow_featurepanel_wrapper', { hScrollbar: false, hideScrollbar: false }); } }); // Automaticalyl select the first feature (node #3 in the tree) --> Root Node \ First Layer Node \ First Feature Node identifyTree.onLoadDeferred.then(function () { if (identifyTreeDisplayData.length > 2) { identifyTree.set("path", [identifyTreeDisplayData[0].id, identifyTreeDisplayData[1].id, identifyTreeDisplayData[2].id]); var selectedNode = identifyTreeDisplayData[2]; identifyTreeOnClick(selectedNode); hideLoading(); } }); }); } function identifyTreeOnClick(item) { if (!item.root) { $("#identifywindow_attributepanel").empty(); if (item.features !== "") { //check to make sure this is a feature node, not a layer node selectedFeature = item; var content = ""; content += " " + item.id + "" //header row closing tags content += " "; content += " "; content += " "; //attribute fields dojo.forEach(LayersFieldName, function (layer) { if (layer.layerName === item.parent) { dojo.forEach(layer.layerFields, function (field) { if ($.inArray(field.name.toUpperCase(), cfg_identifyFieldToHide) == -1 && $.inArray(field.alias.toUpperCase(), cfg_identifyFieldToHide) == -1) { var fv = item.features.attributes[field.alias]; if (fv.toUpperCase().startsWith('HTTP://') || fv.toUpperCase().startsWith('HTTPS://')) { fv = String.format(" ",fv) } content += " "; content += " " + field.name + " "; content += " " + fv + " "; content += " "; content += " "; } }); } }); //end table content += ""; //scroller content += ""; //wrapper //end table //apply result html to attribute panel $("#identifywindow_attributepanel").html(content); myIdentifyScroll = new iScroll('wrapper', ); } } } function hyperLinkField(item, field) { var content = item.features.attributes[field.alias]; dojo.forEach(ConfigLayersWithAttachment, function (layerWithAttachment) { if (item.parent == layerWithAttachment.layerName && field.name == layerWithAttachment.fieldName) { content = "" + content + ""; } }); return content; } function zoomToIdentifyFeature() { var layerID = selectedFeature.layerId; if (layerID == undefined) return; var objectID = selectedFeature.features.attributes.OBJECTID; //initialize query task require(["esri/tasks/QueryTask", "esri/tasks/query"], function (QueryTask, Query) { var queryTask = new QueryTask((cfg_dynamicMapLayerURL + "/" + layerID.toString()).checkAppendToken()); var query = Query(); query.returnGeometry = true; query.outSpatialReference = map.spatialReference; query.outFields = ["*"]; query.where = "OBJECTID ='" + objectID + "'"; queryTask.execute(query, showIdentifyResult); }); } function showIdentifyResult(featureSet) { var resultFeatures = featureSet.features; map.graphics.clear() require(["esri/symbols/SimpleFillSymbol", "esri/symbols/SimpleLineSymbol", "esri/symbols/SimpleMarkerSymbol", ], function (SimpleFillSymbol, SimpleLineSymbol, SimpleMarkerSymbol) { var myFillSymbol = new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID, new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID, new dojo.Color(), 4), new dojo.Color()); var myLineSymbol = new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID, new dojo.Color(), 4); var myMarkerSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE, 10, new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID, new dojo.Color(), 1), new dojo.Color()); dojo.forEach(resultFeatures, function (feature) { TempGraphic = feature; switch (feature.geometry.type) { case "point": case "multipoint": TempGraphic.setSymbol(myMarkerSymbol); agsjsZoomToLocationXY(feature.geometry.x, feature.geometry.y, cfg_ds_point_zoom_width); break; case "line": case "polyline": TempGraphic.setSymbol(myLineSymbol); var extent = feature.geometry.getExtent().expand(cfg_ds_polygon_zoom_factor); break; default: TempGraphic.setSymbol(myFillSymbol); var extent = feature.geometry.getExtent().expand(cfg_ds_polygon_zoom_factor); break; } map.setExtent(extent, true); map.graphics.add(TempGraphic); return; }); }); } >>> Ken Buja 11/5/2014 2:49 PM >>> Ken Buja replied to the discussion "How to know which dynamc map service the visible layer cam from in Nliu's TC widget" To view the discussion, visit: https://community.esri.com/message/435669?et=watches.email.thread#435669