lzugis——Arcgis Server for JavaScript API之自定义InfoWindow
用过Arcgis Server for JavaScript API肯定知道InfoWIndow，你在用InfoWindow的时候会发现各种问题，例如不能完全显示的问题，遮盖对象的问题等等，所以呢我在实现这个功能的时候动了下脑子，想自己用div+css弄一个，倒腾了半天，弄出来了一个如下所示的：
做的比较丑陋，样式方面还得好好下下功夫，东西是差不多实现了，下面说说思路：
首先，DIV定义，这个样式，我定义了5个div，分别是infowin，title，colse，content，arrow，其中，infowin是整个InfoWindow的大框架，title为标题，close为关闭按钮，content为主要内容，arrow为下面的小尾巴，我们可以将这个小尾巴做的长一点，以免对象被遮盖的情况，代码为：
<div id="mapDiv">
<div id="infowin">
<div id="close" onClick="closeInfoWin()">X</div>
<div id="title"></div>
<div id="content"></div>
<div id="arrow"></div>
</div>
</div>
定义了div就得进行布局，定义样式了，样式为：
<style>
html, body, #mapDiv
{
padding:0;
margin:0;
height:100%;
font-size:10px;
position: relative;
}
#infowin
{
display:none;
z-index:10000;
}
#close
{
float:right;
padding-top:10px;
font-weight:bold;
font-size:12px;
color:#FFF;
border:#000 1px solid;
height:20px;
width:20px;
text-align:center;
}
#close:hover
{
cursor:pointer;
}
#title
{
background-color:#666;
padding:10px;
font-weight:bold;
font-size:12px;
}
#content
{
padding-left:10px;
padding-top:10px;
background-color:#999;
height:200px;
}
#arrow
{
background-image:url(arrow.png);
height:30px;
}
</style>样式定义完之后就得考虑事件了，一般InfoWindow是在点击某个对象时弹出来的，所以我们得定义对象图层的click事件：
function leftClick(evt){
infowin.style.display="none";
var strtitle="城市名称"
var strcontent = "****是一座美丽的城市<br><br>****是一座好看的城市<br><br>****是一座富饶的城市<br><br>****是一座漂亮的城市";
infowin.style.left=(evt.clientX-width/2)+"px";
infowin.style.top=(evt.clientY-height-50)+"px";
infowin.style.position="absolute";
infowin.style.width=width+"px";
infowin.style.height=height+"px";
infowin.style.display="block";
title.innerHTML = strtitle;
content.innerHTML = strcontent;
}
//鼠标单击
featurelayercity.on("click", leftClick);点击对象，在鼠标的点击位置出现，所以我们得将infowin的position样式设为absolute，并定义left和top分别为clientX和clientY，并将其display设置为block，将其显示，实现的详细代码如下：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<!--The viewport meta tag is used to improve the presentation and behavior of the samples
on iOS devices-->
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<title>Feature Layer - display results as an InfoWindow onHover</title>
<link rel="stylesheet" href="http://localhost/arcgis_js_api/library/3.8/3.8/js/dojo/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="http://localhost/arcgis_js_api/library/3.8/3.8/js/dojo/dijit/themes/tundra/tundra.css">
<link rel="stylesheet" href="http://localhost/arcgis_js_api/library/3.8/3.8/js/esri/css/esri.css">
<style>
html, body, #mapDiv
{
padding:0;
margin:0;
height:100%;
font-size:10px;
position: relative;
}
#infowin
{
display:none;
z-index:10000;
}
#close
{
float:right;
padding-top:10px;
font-weight:bold;
font-size:12px;
color:#FFF;
border:#000 1px solid;
height:20px;
width:20px;
text-align:center;
}
#close:hover
{
cursor:pointer;
}
#title
{
background-color:#666;
padding:10px;
font-weight:bold;
font-size:12px;
}
#content
{
padding-left:10px;
padding-top:10px;
background-color:#999;
height:200px;
}
#arrow
{
background-image:url(arrow.png);
height:30px;
}
</style>
<script src="http://js.arcgis.com/3.9/"></script>
<script>
var infowin,colse,title,content;
var width=400,height=230;
var closeInfoWin = function (evt){
infowin=document.getElementById("infowin");
infowin.style.display="none";
};
require([
"esri/map", //地图
"esri/layers/ArcGISTiledMapServiceLayer",
"esri/layers/FeatureLayer",//特征层
"esri/symbols/PictureMarkerSymbol",//图片点符号
"esri/renderers/SimpleRenderer", //简单渲染
"esri/graphic", //图片
"esri/lang",
"dojo/domReady!"
], function(
Map,ArcGISTiledMapServiceLayer,FeatureLayer,PictureMarkerSymbol,SimpleRenderer,esriLang
) {
var map = new Map("mapDiv", {
logo:false,
center: [106.6854, 35.8364],
zoom: 4,
slider: true
});
var shpServiceURL="***************************************";
var shpTitlelayer=new ArcGISTiledMapServiceLayer(shpServiceURL);
map.addLayer(shpTitlelayer);
//--------------------------------------------------------------------------------------------------------
var featurelayercity = new FeatureLayer("******************************************************", {
mode: FeatureLayer.MODE_SNAPSHOT,
outFields: ["*"]
});
var pmsRed = new PictureMarkerSymbol('../images/location_icon_blue.png', 20, 20).setOffset(0, 15);
//简单渲染
var sr=new SimpleRenderer(pmsRed);
featurelayercity.setRenderer(sr);
map.addLayer(featurelayercity);
infowin = document.getElementById("infowin");
colse = document.getElementById("close");
title = document.getElementById("title");
content = document.getElementById("content");
function leftClick(evt){
infowin.style.display="none";
var strtitle="城市名称"
var strcontent = "****是一座美丽的城市<br><br>****是一座好看的城市<br><br>****是一座富饶的城市<br><br>****是一座漂亮的城市";
infowin.style.left=(evt.clientX-width/2)+"px";
infowin.style.top=(evt.clientY-height-50)+"px";
infowin.style.position="absolute";
infowin.style.width=width+"px";
infowin.style.height=height+"px";
infowin.style.display="block";
title.innerHTML = strtitle;
content.innerHTML = strcontent;
}
//鼠标单击
featurelayercity.on("click", leftClick);
});
</script>
</head>
<body class="tundra">
<div id="mapDiv">
<div id="infowin">
<div id="close" onClick="closeInfoWin()">X</div>
<div id="title"></div>
<div id="content"></div>
<div id="arrow"></div>
</div>
</div>
</body>
</html>目前只实现到了这儿， 还有以下问题待解决：1、地图拖动后infowin随着地图的联动；2、地图缩放后infowin随着地图的联动；3、内容不在可视范围时候的移动；4、样式，挺难看的。希望有人实现后共享下代码，造福全GISer。
lzugis