SelectFeature
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path;
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>在web地图上创建矢量图层，并在矢量图层上绘制元素</title>
<style type="text/css">
.smallmap{
height: 300px;
width: 600px;
border: 1px solid gray;
}
#positionid{
width: 600px;
text-align: right;
}
</style>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<script src="<%=basePath%>/Script/lib/OpenLayers.js"></script>
<script type="text/javascript">
var map;
var divId='map';
var drawControls = {};
function initMap(){
map = new OpenLayers.Map(divId,{
numZoomLevels:8
});
styleMap = new OpenLayers.StyleMap({
'default': {
strokeOpacity:1,
strokeColor: "#b2d235",
graphicWidth:30,
graphicHeight:50,
externalGraphic:"<%=basePath%>/Script/img/marker.png"
},
'select': {
strokeColor: "#0000ff",
graphicWidth:30,
graphicHeight:50,
externalGraphic:"<%=basePath%>/Script/img/marker.png"
}
});
var veclayer = new OpenLayers.Layer.Vector('vector layer',{
styleMap:styleMap,
rendererOptions: {zIndexing: true}
});
veclayer.addFeatures(new OpenLayers.Feature.Vector(new OpenLayers.Geometry.Point(0,30)));
var googlelayer = new OpenLayers.Layer.Google("Google Streets",{
layers:"basic"
});
var drawlayer = new OpenLayers.Layer.Vector('draw layer');
map.addLayers([googlelayer,veclayer,drawlayer]);
var polygon = new OpenLayers.Control.DrawFeature(drawlayer, OpenLayers.Handler.Polygon);
polygon.featureAdded = getGeometryPoints;//回调函数，获取多边形顶点集合数
drawControls = {
point: new OpenLayers.Control.DrawFeature(drawlayer,OpenLayers.Handler.Point),
line: new OpenLayers.Control.DrawFeature(drawlayer, OpenLayers.Handler.Path),
polygon: polygon,
select: new OpenLayers.Control.SelectFeature( drawlayer,{
clickout: false,
toggle: false,
multiple: false,
hover: false,
toggleKey: "ctrlKey", // ctrl key removes from selection
multipleKey: "shiftKey", // shift key adds to selection
box: true
}),
selecthover: new OpenLayers.Control.SelectFeature(drawlayer,{
multiple: false,
hover: true,
toggleKey: "ctrlKey", // ctrl key removes from selection
multipleKey: "shiftKey" // shift key adds to selection
})
};
for(var key in drawControls) {
map.addControl(drawControls[key]);
}
var dgControl =new OpenLayers.Control.DragFeature(drawlayer);//矢量要素拖动，参数为矢量图层名称，上边已经存在
map.addControl(dgControl);
dgControl.activate();
map.addControls([
new OpenLayers.Control.MousePosition({
'element':document.getElementById('positionid'),
'prefix':'经度: ',
'separator':',纬度: '
}),
new OpenLayers.Control.PanZoomBar(),
new OpenLayers.Control.LayerSwitcher()
]);
map.setCenter(new OpenLayers.LonLat(0,0),3);
map.zoomToMaxExtent();
}
function toggleControl(element){
for(var key in drawControls){
var control = drawControls[key];
if(element.value == key && element.checked){
control.activate();
}else{
control.deactivate();
}
}
}
//feature:OpenLayers.Feature.Vector类型的对象
function getGeometryPoints(feature){
var geometry = feature.geometry;
var lonlat = geometry.getVertices();
document.getElementById("points").innerHTML=lonlat;
alert(lonlat);
}
</script>
</head>
<body onload="initMap();">
<div id="points"></div>
<div id="map" class="smallmap"></div>
<div id="positionid"></div>
<label>导航</label><input type="radio" name="type" value="none" onclick="toggleControl(this)" checked="checked">
<label>点</label><input type="radio" name="type" value="point" onclick="toggleControl(this)">
<label>线</label><input type="radio" name="type" value="line" onclick="toggleControl(this);">
<label>多边形</label><input type="radio" name="type" value="polygon" onclick="toggleControl(this);">
<label>select</label><input type="radio" name="type" value="select" onclick="toggleControl(this);">
<label>selecthover</label><input type="radio" name="type" value="selecthover" onclick="toggleControl(this);">
</body>
</html>转载自：https://blog.csdn.net/ruanqiangqiang/article/details/21347399
