OpenLayers修改要素

<!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>修改要素</title>

    <link rel="stylesheet" href="./OpenLayers-2.12/theme/default/style.css" type="text/css" />

    <script src="./OpenLayers-2.12/lib/OpenLayers.js"></script>

    <link rel="stylesheet" href="./css/style.css" type="text/css">

    <style type="text/css">

        #controls {

            width: 612px;

        }

        #controlToggle {

            padding-left: 1em;

        }

        #controlToggle li {

            list-style: none;

        }

    </style>

    <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';

            // allow testing of specific renderers via "?renderer=Canvas", etc

            var renderer = OpenLayers.Util.getParameters(window.location.href).renderer;

            renderer = (renderer) ? [renderer] : OpenLayers.Layer.Vector.prototype.renderers;

            vectors = new OpenLayers.Layer.Vector("Vector Layer", {

                renderers: renderer

            });

            map.addLayers([wms, vectors]);

            map.addControl(new OpenLayers.Control.LayerSwitcher());

            map.addControl(new OpenLayers.Control.MousePosition());

            if (console && console.log) {

                function report(event) {

                    console.log(event.type, event.feature ? event.feature.id : event.components);

                }

                vectors.events.on({

                    "beforefeaturemodified": report,

                    "featuremodified": report,

                    "afterfeaturemodified": report,

                    "vertexmodified": report,

                    "sketchmodified": report,

                    "sketchstarted": report,

                    "sketchcomplete": report

                });

            }

            controls = {

                point: new OpenLayers.Control.DrawFeature(vectors,

                            OpenLayers.Handler.Point),

                line: new OpenLayers.Control.DrawFeature(vectors,

                            OpenLayers.Handler.Path),

                polygon: new OpenLayers.Control.DrawFeature(vectors,

                            OpenLayers.Handler.Polygon),

                regular: new OpenLayers.Control.DrawFeature(vectors,

                            OpenLayers.Handler.RegularPolygon,

                            {handlerOptions: {sides: 5}}),

                modify: new OpenLayers.Control.ModifyFeature(vectors)

            };

            for(var key in controls) {

                map.addControl(controls[key]);

            }

            map.setCenter(new OpenLayers.LonLat(0, 0), 3);

            document.getElementById('noneToggle').checked = true;

        }

        function update() {

            // reset modification mode

            controls.modify.mode = OpenLayers.Control.ModifyFeature.RESHAPE;

            var rotate = document.getElementById("rotate").checked;

            if(rotate) {

                controls.modify.mode |= OpenLayers.Control.ModifyFeature.ROTATE;

            }

            var resize = document.getElementById("resize").checked;

            if(resize) {

                controls.modify.mode |= OpenLayers.Control.ModifyFeature.RESIZE;

                var keepAspectRatio = document.getElementById("keepAspectRatio").checked;

                if (keepAspectRatio) {

                    controls.modify.mode &= ~OpenLayers.Control.ModifyFeature.RESHAPE;

                }

            }

            var drag = document.getElementById("drag").checked;

            if(drag) {

                controls.modify.mode |= OpenLayers.Control.ModifyFeature.DRAG;

            }

            if (rotate || drag) {

                controls.modify.mode &= ~OpenLayers.Control.ModifyFeature.RESHAPE;

            }

            controls.modify.createVertices = document.getElementById("createVertices").checked;

            var sides = parseInt(document.getElementById("sides").value);

            sides = Math.max(3, isNaN(sides) ? 0 : sides);

            controls.regular.handler.sides = sides;

            var irregular =  document.getElementById("irregular").checked;

            controls.regular.handler.irregular = irregular;

        }

        function toggleControl(element) {

            for(key in controls) {

                var control = controls[key];

                if(element.value == key && element.checked) {

                    control.activate();

                } else {

                    control.deactivate();

                }

            }

        }

    </script>

  </head>

  <body onload="init()">

    <div id="map" class="smallmap"></div>

    <div id="controls">

        <ul id="controlToggle">

                <input type="radio" name="type" value="none" id="noneToggle"

                       onclick="toggleControl(this);" checked="checked" />

                <label for="noneToggle">导航</label>

                <input type="radio" name="type" value="point" id="pointToggle" onclick="toggleControl(this);" />

                <label for="pointToggle">画点</label>

                <input type="radio" name="type" value="line" id="lineToggle" onclick="toggleControl(this);" />

                <label for="lineToggle">画线</label>

                <input type="radio" name="type" value="polygon" id="polygonToggle" onclick="toggleControl(this);" />

                <label for="polygonToggle">画多边形</label>

                <input type="radio" name="type" value="regular" id="regularToggle" onclick="toggleControl(this);" />

                <label for="regularToggle">画规则多边形</label>

                <label for="sides"> - 边</label>

                <input id="sides" type="text" size="2" maxlength="2"

                       name="sides" value="5" onchange="update()" />

                        <input id="irregular" type="checkbox"

                               name="irregular" onchange="update()" />

                        <label for="irregular">不规则</label>

            </li>

            <li>

                <input type="radio" name="type" value="modify" id="modifyToggle"

                       onclick="toggleControl(this);" />

                <label for="modifyToggle">修改功能</label>

                <ul>

                        <input id="createVertices" type="checkbox" checked

                               name="createVertices" onchange="update()" />

                        <label for="createVertices">允许创建顶点</label>

                        <input id="rotate" type="checkbox"

                               name="rotate" onchange="update()" />

                        <label for="rotate">允许旋转</label>

                        <input id="resize" type="checkbox"

                               name="resize" onchange="update()" />

                        <label for="resize">允许调整大小</label>

                        (<input id="keepAspectRatio" type="checkbox"

                               name="keepAspectRatio" onchange="update()" checked="checked" />

                        <label for="keepAspectRatio">保持宽高比例</label>)

                        <input id="drag" type="checkbox"

                               name="drag" onchange="update()" />

                        <label for="drag">允许拖动</label>

                </ul>

            </li>

        </ul>

    </div>

  </body>

</html>

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