在LayerList小部件中可见的单层(ArcGIS JavaScript) [英] Single layer visible in LayerList widget (ArcGIS JavaScript)
本文介绍了在LayerList小部件中可见的单层(ArcGIS JavaScript)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
是否可以在此 ESRI中在地图上显示单个图层教程 LayerList小部件?
Is it possible to have a single layer visible on the map in this ESRI tutorial LayerList widget ?
每次单击图层时，上一个将被禁用.因此，您在地图上始终只有一层.
Each time you click on a layer, the previous one should deactivate. So you always have only one layer on the map.
米歇尔
推荐答案
我设法为您编写了代码.检查一下，让我知道:
I managed to write a code for you . Check it and let me know :
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<title>Layer List Dijit</title>
<link rel="stylesheet" href="https://js.arcgis.com/3.20/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="https://js.arcgis.com/3.20/esri/css/esri.css">
<script language="javascript" src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<style>
html, body, .container, #map {
height:100%;
width:100%;
margin:0;
padding:0;
margin:0;
font-family: "Open Sans";
}
#map {
padding:0;
}
#layerListPane{
width:25%;
}
.esriLayer{
background-color: #fff;
}
.esriLayerList .esriList{
border-top:none;
}
.esriLayerList .esriTitle {
background-color: #fff;
border-bottom:none;
}
.esriLayerList .esriList ul{
background-color: #fff;
}
</style>
<script>var dojoConfig = { parseOnLoad: true };var busy=false;</script>
<script src="https://js.arcgis.com/3.20/"></script>
<script>
require([
"esri/arcgis/utils",
"esri/dijit/LayerList",
"dijit/layout/BorderContainer",
"dijit/layout/ContentPane",
"dojo/domReady!"
], function(
arcgisUtils,
LayerList
) {
//Create a map based on an ArcGIS Online web map id
arcgisUtils.createMap("f63fed3f87fc488489e27c026fa5d434", "map").then(function(response){
var myWidget = new LayerList({
map: response.map,
layers: arcgisUtils.getLayerList(response)
},"layerList");
myWidget.on("toggle",function(evt){
if(busy) return;
selectedLayerSubIndex = evt.subLayerIndex;
if(selectedLayerSubIndex) return;
selectedLayerIndex = evt.layerIndex;
visibility = evt.visible;
elm = $("#layerListPane input[type=checkbox][data-layer-index="+selectedLayerIndex+"]:not([data-sublayer-index])");
otherCheckedElems = $("#layerListPane input[type=checkbox][data-layer-index!="+selectedLayerIndex+"]:not([data-sublayer-index]):checked");
if(visibility){
busy=true;
otherCheckedElems.each(function () {
$(this).click();
});
busy=false;
}
else{
checkedLength = otherCheckedElems.length
if(checkedLength==0) setTimeout("elm.click();", 100);
}
})
myWidget.startup();
});
});
</script>
</head>
<body class="claro">
<div class="container" data-dojo-type="dijit/layout/BorderContainer"
data-dojo-props="design:'headline',gutters:false">
<div id="layerListPane" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'right'">
<div id="layerList"></div>
</div>
<div id="map" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'center'"></div>
</div>
</body>
</html>
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