У меня возникли проблемы при попытке объединить функциональность между фильтром по атрибуту и функциями запроса из FeatureLayerView. Оба образца приведены ниже:
https://developers.arcgis.com/javascript/latest/sample-code/featurefilter-attributes/index.html
https://developers.arcgis.com/javascript/latest/sample-code/featurelayerview-query/index.html
Целью является применение выбранного фильтра ( Фильтровать объект по атрибуту), и этот фильтр будет применен к Query FeatureLayerView, отображаемому на боковой панели.
В настоящее время обе функции работают правильно в одном примере, однако они по-прежнему работают изолированно друг от друга. Я добавил код, который у нас есть ниже.
Любая помощь будет принята с благодарностью.
<script src="https://js.arcgis.com/4.15/"></script>
<style>
html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
#seasons-filter {
height: 160px;
width: 160px;
width: 100%;
visibility: hidden;
}
.season-item {
width: 100%;
padding: 12px;
text-align: center;
vertical-align: baseline;
cursor: pointer;
height: 40px;
height: 50px;
}
.season-item:focus {
background-color: dimgrey;
}
.season-item:hover {
background-color: dimgrey;
}
.panel-container {
position: relative;
width: 100%;
height: 100%;
}
.panel-side {
padding: 2px;
box-sizing: border-box;
width: 300px;
height: 100%;
position: absolute;
top: 0;
right: 0;
color: #fff;
background-color: rgba(0, 0, 0, 0.6);
overflow: auto;
z-index: 60;
}
.panel-side h3 {
padding: 0 20px;
margin: 20px 0;
}
.panel-side ul {
list-style: none;
margin: 0;
padding: 0;
}
.panel-side li {
list-style: none;
padding: 10px 20px;
}
.panel-result {
cursor: pointer;
margin: 2px 0;
background-color: rgba(0, 0, 0, 0.3);
}
.panel-result:hover,
.panel-result:focus {
color: orange;
background-color: rgba(0, 0, 0, 0.75);
}
</style>
<script>
require([
"esri/views/MapView",
"esri/Map",
"esri/layers/FeatureLayer",
"esri/widgets/Expand"
], function(MapView, Map, FeatureLayer, Expand) {
let floodLayerView;
let graphics;
const listNode = document.getElementById("nyc_graphics");
const popupTemplate = {
// autocasts as new PopupTemplate()
title: "{NAME} in {COUNTY}",
content: [
{
type: "fields",
fieldInfos: [
{
fieldName: "B12001_calc_pctMarriedE",
label: "% Married",
format: {
places: 0,
digitSeparator: true
}
}
]
}
]
};
// flash flood warnings layer
const layer = new FeatureLayer({
url:
"https://services.arcgis.com/P3ePLMYs2RVChkJx/ArcGIS/rest/services/ACS_Marital_Status_Boundaries/FeatureServer/2",
outFields: ["NAME", "GEOID"], // used by queryFeatures
popupTemplate: popupTemplate
});
const map = new Map({
basemap: "gray-vector",
layers: [layer]
});
const view = new MapView({
map: map,
container: "viewDiv",
center: [-73.95, 40.702],
zoom: 11
});
const seasonsNodes = document.querySelectorAll(`.season-item`);
const seasonsElement = document.getElementById("seasons-filter");
// click event handler for seasons choices
seasonsElement.addEventListener("click", filterBySeason);
// User clicked on Winter, Spring, Summer or Fall
// set an attribute filter on flood warnings layer view
// to display the warnings issued in that season
function filterBySeason(event) {
const selectedSeason = event.target.getAttribute("data-season");
floodLayerView.filter = {
where: "State = '" + selectedSeason + "'"
};
}
view.whenLayerView(layer).then(function(layerView) {
// flash flood warnings layer loaded
// get a reference to the flood warnings layerview
floodLayerView = layerView;
// set up UI items
seasonsElement.style.visibility = "visible";
const seasonsExpand = new Expand({
view: view,
content: seasonsElement,
expandIconClass: "esri-icon-filter",
group: "top-left"
});
//clear the filters when user closes the expand widget
seasonsExpand.watch("expanded", function() {
if (!seasonsExpand.expanded) {
floodLayerView.filter = null;
}
});
view.ui.add(seasonsExpand, "top-left");
});
// Start Of Side Bar Element
view.whenLayerView(layer).then(function(layerView) {
layerView.watch("updating", function(value) {
if (!value) {
// wait for the layer view to finish updating
// query all the features available for drawing.
layerView
.queryFeatures({
geometry: view.extent,
returnGeometry: true,
orderByFields: ["NAME"]
})
.then(function(results) {
graphics = results.features;
const fragment = document.createDocumentFragment();
graphics.forEach(function(result, index) {
const attributes = result.attributes;
const name = attributes.NAME;
// Create a list zip codes in NY
const li = document.createElement("li");
li.classList.add("panel-result");
li.tabIndex = 0;
li.setAttribute("data-result-id", index);
li.textContent = name;
fragment.appendChild(li);
});
// Empty the current list
listNode.innerHTML = "";
listNode.appendChild(fragment);
})
.catch(function(error) {
console.error("query failed: ", error);
});
}
});
});
// listen to click event on the zip code list
listNode.addEventListener("click", onListClickHandler);
function onListClickHandler(event) {
const target = event.target;
const resultId = target.getAttribute("data-result-id");
// get the graphic corresponding to the clicked zip code
const result =
resultId && graphics && graphics[parseInt(resultId, 10)];
if (result) {
// open the popup at the centroid of zip code polygon
// and set the popup's features which will populate popup content and title.
view
.goTo(result.geometry.extent.expand(2))
.then(function() {
view.popup.open({
features: [result],
location: result.geometry.centroid
});
})
.catch(function(error) {
if (error.name != "AbortError") {
console.error(error);
}
});
}
}
});
</script>