openlayers/examples/vector-features-with-text.html

   1 <html xmlns="http://www.w3.org/1999/xhtml">
   2   <head>
   3     <title>OpenLayers Labeled Features Example</title>
   4     <link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
   5     <link rel="stylesheet" href="style.css" type="text/css" />
   6     <script src="../lib/OpenLayers.js"></script>
   7     <script type="text/javascript">
   8         var map;
   9
  10         function init(){
  11             map = new OpenLayers.Map('map');
  12
  13             var layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
  14                     "http://labs.metacarta.com/wms/vmap0", {layers: 'basic'} );
  15             map.addLayer(layer);
  16
  17             // allow testing of specific renderers via "?renderer=Canvas", etc
  18             var renderer = OpenLayers.Util.getParameters(window.location.href).renderer;
  19             renderer = (renderer) ? [renderer] : OpenLayers.Layer.Vector.prototype.renderers;
  20
  21             var vectorLayer = new OpenLayers.Layer.Vector("Simple Geometry", {
  22                 styleMap: new OpenLayers.StyleMap({'default':{
  23                     strokeColor: "#00FF00",
  24                     strokeOpacity: 1,
  25                     strokeWidth: 3,
  26                     fillColor: "#FF5500",
  27                     fillOpacity: 0.5,
  28                     pointRadius: 6,
  29                     pointerEvents: "visiblePainted",
  30                     label : "name: ${name}, age: ${age}",
  31
  32                     fontColor: "${favColor}",
  33                     fontSize: "12px",
  34                     fontFamily: "Courier New, monospace",
  35                     fontWeight: "bold",
  36                     labelAlign: "${align}"
  37                 }}),
  38                 renderers: renderer
  39             });
  40
  41             // create a point feature
  42             var point = new OpenLayers.Geometry.Point(-111.04, 45.68);
  43             var pointFeature = new OpenLayers.Feature.Vector(point);
  44             pointFeature.attributes = {
  45                 name: "toto",
  46                 age: 20,
  47                 favColor: 'red',
  48                 align: "cm"
  49             };
  50
  51             // create a polygon feature from a linear ring of points
  52             var pointList = [];
  53             for(var p=0; p<6; ++p) {
  54                 var a = p * (2 * Math.PI) / 7;
  55                 var r = Math.random(1) + 1;
  56                 var newPoint = new OpenLayers.Geometry.Point(point.x + 5 + (r * Math.cos(a)),
  57                                                              point.y + 5 + (r * Math.sin(a)));
  58                 pointList.push(newPoint);
  59             }
  60             pointList.push(pointList[0]);
  61
  62             var linearRing = new OpenLayers.Geometry.LinearRing(pointList);
  63             var polygonFeature = new OpenLayers.Feature.Vector(
  64                 new OpenLayers.Geometry.Polygon([linearRing]));
  65             polygonFeature.attributes = {
  66                 name: "dude",
  67                 age: 21,
  68                 favColor: 'purple',
  69                 align: 'lb'
  70             };
  71
  72             multiFeature = new OpenLayers.Feature.Vector(
  73                 new OpenLayers.Geometry.Collection([
  74                     new OpenLayers.Geometry.LineString([
  75                         new OpenLayers.Geometry.Point(-105,40),
  76                         new OpenLayers.Geometry.Point(-95,45)
  77                     ]),
  78                     new OpenLayers.Geometry.Point(-105, 40)
  79                 ]),
  80                 {
  81                     name: "ball-and-chain",
  82                     age: 30,
  83                     favColor: 'black',
  84                     align: 'rt'
  85                 });
  86             var nullFeature = new OpenLayers.Feature.Vector(null);
  87             nullFeature.attributes = {
  88                 name: "toto is some text about the world",
  89                 age: 20,
  90                 favColor: 'red',
  91                 align: "cm"
  92             };
  93
  94             map.addLayer(vectorLayer);
  95             vectorLayer.drawFeature(multiFeature);
  96             map.setCenter(new OpenLayers.LonLat(point.x, point.y), 3);
  97             vectorLayer.addFeatures([pointFeature, polygonFeature, multiFeature, nullFeature ]);
  98         }
  99     </script>
 100   </head>
 101   <body onload="init()">
 102     <h1 id="title">OpenLayers Labeled features example</h1>
 103     <div id="tags"></div>
 104     <p id="shortdesc">
 105         Label vector features with a text symbolizer.
 106     </p>
 107     <div id="map" class="smallmap"></div>
 108     <div id="docs">
 109     This example shows drawing simple vector features with a label
 110     </div>
 111   </body>
 112 </html>