Openlayers修改矢量要素并且可捕捉

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<title>Modify Feature</title>
<link rel="stylesheet" href="../theme/default/style.css" type="text/css">
<link rel="stylesheet" href="style.css" type="text/css">
<style type="text/css">

</style>
<script src="../lib/OpenLayers.js"></script>
<script type="text/javascript">
var map, vectors, controls;
function init(){
map = new OpenLayers.Map('map');
var wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
"http://vmap0.tiles.osgeo.org/wms/vmap0?", {layers: 'basic'});
OpenLayers.Feature.Vector.style['default']['strokeWidth'] = '2';

vectors = new OpenLayers.Layer.Vector("Vector Layer");
//给出polygon画图形
var geometry = OpenLayers.Geometry.fromWKT(
'POLYGON((110 20,120 20,120 10,110 10,110 20),(112 17,118 18,118 16,112 15,112 17))'
);

vectors.addFeatures([new OpenLayers.Feature.Vector(geometry)]);

map.addLayers([wms, vectors]);
//画图形
controls = new OpenLayers.Control.DrawFeature(vectors,
OpenLayers.Handler.Polygon);

map.addControl(controls);
controls.activate();
map.setCenter(new OpenLayers.LonLat(110, 20), 3);
}

function update() {
// 修改
controls.deactivate();
controls = new OpenLayers.Control.ModifyFeature(vectors);
map.addControl(controls);
controls.activate();

var snap = new OpenLayers.Control.Snapping({
layer: vectors,
targets:vectors,
defaults:{
nodeTolerance:30,
vertexTolerance:30,
edgeTolerance:20
},
greedy: false
});
map.addControl(snap);
snap.activate();
}

function deactivate(){
controls.deactivate();
}

</script>
</head>
<body onload="init()">
<div id="map" class="smallmap"></div>
<div><input type = "button" value = "修改" onclick = "update()"/>
<input type = "button" value = "取消" onclick = "deactivate()"/>
</div>
</body>
</html>

巴特西

Openlayers修改矢量要素并且可捕捉

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