Executing a query against featurelayer:
var queryTask = new Query(layer.url) ;
var esriQuery = new EsriQuery() ;
esriQuery.outFields = ["*"] ;
if (query.where)
esriQuery.where = query.where;
else
esriQuery.where = "1=1";
queryTask.execute(esriQuery, function(featureSet){
//***
});
get the following error:
0x800a138f - JavaScript runtime error: Unable to get property 'setTransform' of undefined or null reference
from http://js.arcgis.com/3.10/
This error occurs for some featurelayers, and works for at least one of them used.
Might this go away by upgrading to the latest version? Currently using 3.10.
Tried upgrading by changing all the references of 3.10 to 3.12. But this led to other Javascript initialization errors...
Solved! Go to Solution.
Resolved this for now by hiding the original layer instead of removing it.
Edward,
You have some things in your code that look wrong:
var queryTask = new Query(layer.url) ; var esriQuery = new EsriQuery() ; esriQuery.outFields = ["*"] ; if (query.where) esriQuery.where = query.where; else esriQuery.where = "1=1"; queryTask.execute(esriQuery, function(featureSet){ //*** });
var queryTask = new Query(layer.url); var esriQuery = new EsriQuery() ;
normally looks like:
var queryTask = new QueryTask(layer.url); var esriQuery = new Query() ;
What do your requires look like?
The requires are:
"esri/tasks/QueryTask",
"esri/tasks/query",
...
Query,
EsriQuery,
So the Query is actually QueryTask and EsriQuery is actually Query.
The issue seems to happen because normally the layer comes in as part of the map layers from ArcGisOnline. Currently the code removes the layer from the map using removeLayer and wraps the original layer in the ClusterLayer implementation (downloaded from samples) and sets the clusterlayer's Id to the removed layer's Id then adds it to the map using addLayer. The above query occurs on the _refresh event for the cluster layer.
When I don't remove the original layer and keep both layers on the map (and adjust the clusterlayer Id to something different for this) then the error doesn't happen. However when the original layer is removed, the error occurs. The thing is this only happens for some of the feature layers, i.e. when I replace it with the clustered layer implementation, and not for some of the other feature layers.
Here is the code for the ClusterLayer implementation. (Changed the require to use QueryTask and EsriQuery instead.)
define([
"dojo/_base/declare",
"dojo/_base/array",
"esri/Color",
"dojo/_base/connect",
"esri/SpatialReference",
"esri/geometry/Point",
"esri/graphic",
"esri/symbols/SimpleMarkerSymbol",
"esri/symbols/TextSymbol",
"esri/dijit/PopupTemplate",
"esri/layers/GraphicsLayer",
"dojo/_base/lang",
,
"esri/tasks/QueryTask",
"esri/tasks/query"
], function (
declare, arrayUtils, Color, connect,
SpatialReference, Point, Graphic, SimpleMarkerSymbol, TextSymbol,
PopupTemplate, GraphicsLayer, lang, QueryTask, EsriQuery
) {
return declare([GraphicsLayer], {
constructor: function (options) {
// options:
// data: Object[]
// Array of objects. Required. Object are required to have properties named x, y and attributes. The x and y coordinates have to be numbers that represent a points coordinates.
// distance: Number?
// Optional. The max number of pixels between points to group points in the same cluster. Default value is 50.
// labelColor: String?
// Optional. Hex string or array of rgba values used as the color for cluster labels. Default value is #fff (white).
// labelOffset: String?
// Optional. Number of pixels to shift a cluster label vertically. Defaults to -5 to align labels with circle symbols. Does not work in IE.
// resolution: Number
// Required. Width of a pixel in map coordinates. Example of how to calculate:
// map.extent.getWidth() / map.width
// showSingles: Boolean?
// Optional. Whether or graphics should be displayed when a cluster graphic is clicked. Default is true.
// singleSymbol: MarkerSymbol?
// Marker Symbol (picture or simple). Optional. Symbol to use for graphics that represent single points. Default is a small gray SimpleMarkerSymbol.
// singleTemplate: PopupTemplate?
// PopupTemplate</a>. Optional. Popup template used to format attributes for graphics that represent single points. Default shows all attributes as "attribute = value" (not recommended).
// maxSingles: Number?
// Optional. Threshold for whether or not to show graphics for points in a cluster. Default is 1000.
// webmap: Boolean?
// Optional. Whether or not the map is from an ArcGIS.com webmap. Default is false.
// spatialReference: SpatialReference?
// Optional. Spatial reference for all graphics in the layer. This has to match the spatial reference of the map. Default is 102100. Omit this if the map uses basemaps in web mercator.
this._clusterTolerance = options.distance || 50;
this._clusterData = options.data || [];
this._clusters = [];
this._clusterLabelColor = options.labelColor || "#000";
// labelOffset can be zero so handle it differently
this._clusterLabelOffset = (options.hasOwnProperty("labelOffset")) ? options.labelOffset : -5;
// graphics that represent a single point
this._singles = []; // populated when a graphic is clicked
this._showSingles = options.hasOwnProperty("showSingles") ? options.showSingles : true;
// symbol for single graphics
var SMS = SimpleMarkerSymbol;
this._singleSym = options.singleSymbol || new SMS("circle", 6, null, new Color("#888"));
this._singleTemplate = options.singleTemplate || new PopupTemplate({ "title": "", "description": "{*}" });
this._maxSingles = options.maxSingles || 1000;
this._webmap = options.hasOwnProperty("webmap") ? options.webmap : false;
//hack: should probably base it off the map
this._sr = options.spatialReference || new SpatialReference({ "wkid": 102100 });
//this._extentChange = null;
this._layer = options.layer;
this._queryTask = new QueryTask(this._layer.url);
this._esriQuery = new EsriQuery();
this._chunk = options.chunk;
},
refresh: function () {
if (this._layer.visible)
this._refresh();
else
this.clear();
},
_refresh: function () {
if (!this._layer.visible)
return;
this._queryData();
},
_queryData: function () {
this._esriQuery.returnGeometry = true;
this._esriQuery.outFields = this._layer._outFields;
this._esriQuery.geometry = this._layer._map.extent;
if (this._layer.getDefinitionExpression())
this._esriQuery.where = this._layer.getDefinitionExpression();
else
this._esriQuery.where = "1=1";
this._queryTask.execute(this._esriQuery, lang.hitch(this, function (featureSet) {
var inputInfo = {};
inputInfo.data = dojo.map(featureSet.features, function (feature) {
var pointX = feature.geometry.x;
var pointY = feature.geometry.y;
var att = feature.attributes;
return {
"x": pointX,
"y": pointY,
"attributes": att
};
});
this._clusterData.length = 0;
this._clusterData = inputInfo.data;
// update resolution
this._clusterResolution = this._map.extent.getWidth() / this._map.width;
this.clear();
this._clusterGraphics();
}));
},
// override esri/layers/GraphicsLayer methods
_setMap: function (map, surface) {
// calculate and set the initial resolution
this._clusterResolution = map.extent.getWidth() / map.width; // probably a bad default...
this._layer._map = map;
this._layer._map.on("click", lang.hitch(this, function (e) {
if (this._layer._map.infoWindow.isShowing)
this._layer._map.infoWindow.hide();
}));
// GraphicsLayer will add its own listener here
var div = this.inherited(arguments);
return div;
},
_unsetMap: function () {
this.inherited(arguments);
//connect.disconnect(this._extentChange);
},
// public ClusterLayer methods
add: function (p) {
// Summary: The argument is a data point to be added to an existing cluster. If the data point falls within an existing cluster, it is added to that cluster and the cluster's label is updated. If the new point does not fall within an existing cluster, a new cluster is created.
//
// if passed a graphic, use the GraphicsLayer's add method
if (p.declaredClass) {
this.inherited(arguments);
return;
}
// add the new data to _clusterData so that it's included in clusters
// when the map level changes
this._clusterData.push(p);
var clustered = false;
// look for an existing cluster for the new point
for (var i = 0; i < this._clusters.length; i++) {
var c = this._clusters;
if (this._clusterTest(p, c)) {
// add the point to an existing cluster
this._clusterAddPoint(p, c);
// update the cluster's geometry
this._updateClusterGeometry(c);
// update the label
this._updateLabel(c);
clustered = true;
break;
}
}
if (!clustered) {
this._clusterCreate(p);
p.attributes.clusterCount = 1;
this._showCluster(p);
}
},
clear: function () {
// Summary: Remove all clusters and data points.
this.inherited(arguments);
this._clusters.length = 0;
},
clearSingles: function (singles) {
// Summary: Remove graphics that represent individual data points.
var s = singles || this._singles;
arrayUtils.forEach(s, function (g) {
this.remove(g);
}, this);
this._singles.length = 0;
},
onClick: function (e) {
// remove any previously showing single features
this.clearSingles(this._singles);
// find single graphics that make up the cluster that was clicked
// would be nice to use filter but performance tanks with large arrays in IE
var singles = [];
for (var i = 0, il = this._clusterData.length; i < il; i++) {
if (e.graphic.attributes.clusterId == this._clusterData.attributes.clusterId) {
singles.push(this._clusterData);
}
}
if (singles.length > this._maxSingles) {
alert("Sorry, that cluster contains more than " + this._maxSingles + " points. Zoom in for more detail.");
return;
} else {
// stop the click from bubbling to the map
e.stopPropagation();
//this._map.infoWindow.show(e.graphic.geometry);
this._addSingles(singles, e.graphic.geometry);
this._map.infoWindow.show(e.graphic.geometry);
}
},
// internal methods
_clusterGraphics: function () {
// first time through, loop through the points
for (var j = 0, jl = this._clusterData.length; j < jl; j++) {
// see if the current feature should be added to a cluster
var point = this._clusterData
var clustered = false;
var numClusters = this._clusters.length;
for (var i = 0; i < this._clusters.length; i++) {
var c = this._clusters;
if (this._clusterTest(point, c)) {
this._clusterAddPoint(point, c);
clustered = true;
break;
}
}
if (!clustered) {
this._clusterCreate(point);
}
}
this._showAllClusters();
},
_clusterTest: function (p, cluster) {
var distance = (
Math.sqrt(
Math.pow((cluster.x - p.x), 2) + Math.pow((cluster.y - p.y), 2)
) / this._clusterResolution
);
return (distance <= this._clusterTolerance);
},
// points passed to clusterAddPoint should be included
// in an existing cluster
// also give the point an attribute called clusterId
// that corresponds to its cluster
_clusterAddPoint: function (p, cluster) {
// average in the new point to the cluster geometry
var count, x, y;
count = cluster.attributes.clusterCount;
x = (p.x + (cluster.x * count)) / (count + 1);
y = (p.y + (cluster.y * count)) / (count + 1);
cluster.x = x;
cluster.y = y;
// build an extent that includes all points in a cluster
// extents are for debug/testing only...not used by the layer
if (p.x < cluster.attributes.extent[0]) {
cluster.attributes.extent[0] = p.x;
} else if (p.x > cluster.attributes.extent[2]) {
cluster.attributes.extent[2] = p.x;
}
if (p.y < cluster.attributes.extent[1]) {
cluster.attributes.extent[1] = p.y;
} else if (p.y > cluster.attributes.extent[3]) {
cluster.attributes.extent[3] = p.y;
}
// increment the count
cluster.attributes.clusterCount++;
// attributes might not exist
if (!p.hasOwnProperty("attributes")) {
p.attributes = {};
}
// give the graphic a cluster id
p.attributes.clusterId = cluster.attributes.clusterId;
},
// point passed to clusterCreate isn't within the
// clustering distance specified for the layer so
// create a new cluster for it
_clusterCreate: function (p) {
var clusterId = this._clusters.length + 1;
// console.log("cluster create, id is: ", clusterId);
// p.attributes might be undefined
if (!p.attributes) {
p.attributes = {};
}
p.attributes.clusterId = clusterId;
// create the cluster
var cluster = {
"x": p.x,
"y": p.y,
"attributes": {
"clusterCount": 1,
"clusterId": clusterId,
"extent": [p.x, p.y, p.x, p.y]
}
};
this._clusters.push(cluster);
},
_showAllClusters: function () {
for (var i = 0, il = this._clusters.length; i < il; i++) {
var c = this._clusters;
this._showCluster(c);
}
},
_showCluster: function (c) {
var point = new Point(c.x, c.y, this._sr);
this.add(
new Graphic(
point,
null,
c.attributes
)
);
// code below is used to not label clusters with a single point
if (c.attributes.clusterCount == 1) {
return;
}
// show number of points in the cluster
var label = new TextSymbol(c.attributes.clusterCount)
.setColor(new Color(this._clusterLabelColor))
.setOffset(0, this._clusterLabelOffset);
this.add(
new Graphic(
point,
label,
c.attributes
)
);
},
_addSingles: function (singles, c) {
// add single graphics to the map
arrayUtils.forEach(singles, function (p) {
var g = new Graphic(
this._showSingles ? new Point(p.x, p.y, this._sr) : new Point(c.x, c.y, this._sr),
this._singleSym,
p.attributes,
this._singleTemplate
);
this._singles.push(g);
if (this._showSingles) {
this.add(g);
}
}, this);
this._map.infoWindow.setFeatures(this._singles);
},
_updateClusterGeometry: function (c) {
// find the cluster graphic
var cg = arrayUtils.filter(this.graphics, function (g) {
return !g.symbol &&
g.attributes.clusterId == c.attributes.clusterId;
});
if (cg.length == 1) {
cg[0].geometry.update(c.x, c.y);
} else {
console.log("didn't find exactly one cluster geometry to update: ", cg);
}
},
_updateLabel: function (c) {
// find the existing label
var label = arrayUtils.filter(this.graphics, function (g) {
return g.symbol &&
g.symbol.declaredClass == "esri.symbol.TextSymbol" &&
g.attributes.clusterId == c.attributes.clusterId;
});
if (label.length == 1) {
// console.log("update label...found: ", label);
this.remove(label[0]);
var newLabel = new TextSymbol(c.attributes.clusterCount)
.setColor(new Color(this._clusterLabelColor))
.setOffset(0, this._clusterLabelOffset);
this.add(
new Graphic(
new Point(c.x, c.y, this._sr),
newLabel,
c.attributes
)
);
// console.log("updated the label");
} else {
console.log("didn't find exactly one label: ", label);
}
},
// debug only...never called by the layer
_clusterMeta: function () {
// print total number of features
console.log("Total: ", this._clusterData.length);
// add up counts and print it
var count = 0;
arrayUtils.forEach(this._clusters, function (c) {
count += c.attributes.clusterCount;
});
console.log("In clusters: ", count);
}
});
});
//calling above
var clusterLayer = new ClusterLayer({
"data": [],
"distance": 100,
"id": "clusters",
"labelColor": "#fff",
"labelOffset": 10,
"singleColor": "#888",
"layer": layer.layerObject,
"id": layer.id,
"labelOffset": -5,
"singleSymbol": layer.layerObject.renderer.symbol,
"showSingles": false,
"maxSingles": 10000,
"singleTemplate": layer.layerObject.infoTemplate,
"chunk": 1000
});
var defaultSym = new esri.symbol.SimpleMarkerSymbol().setSize(4);
var renderer = new esri.renderer.ClassBreaksRenderer(defaultSym, "clusterCount");
var blue = new esri.symbol.PictureMarkerSymbol("../images/cluster_icons/BluePin1LargeB.png", 32, 32).setOffset(0, 0); //15
var green = new esri.symbol.PictureMarkerSymbol("../images/cluster_icons/GreenPin1LargeB.png", 64, 64).setOffset(0, 0);
var red = new esri.symbol.PictureMarkerSymbol("../images/cluster_icons/RedPin1LargeB.png", 72, 72).setOffset(0, 0);
renderer.addBreak(1, 1, layer.layerObject.renderer.symbol);
renderer.addBreak(2, 10, blue);
renderer.addBreak(10, 200, green);
renderer.addBreak(200, 10000, red);
clusterLayer.setRenderer(renderer);
clusterLayer.title = layer.title;
clusterLayer._layer.setVisibility(layer.visibility);
this.parentContext.map.removeLayer(layer.layerObject);
this.parentContext.map.addLayer(clusterLayer);
Resolved this for now by hiding the original layer instead of removing it.