ab53ba3982
git-svn-id: http://svn.openlayers.org/trunk/openlayers@4268 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
123 lines
5.4 KiB
HTML
123 lines
5.4 KiB
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<style type="text/css">
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#map {
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width: 800px;
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height: 475px;
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border: 1px solid black;
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}
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</style>
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<script src="../lib/OpenLayers.js" type="text/javascript"></script>
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<script type="text/javascript">
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var map;
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function init(){
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map = new OpenLayers.Map('map');
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var layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
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"http://labs.metacarta.com/wms/vmap0", {layers: 'basic'} );
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map.addLayer(layer);
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/*
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* Layer style
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*/
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// we want opaque external graphics and non-opaque internal graphics
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var layer_style = OpenLayers.Util.extend({}, OpenLayers.Feature.Vector.style['default']);
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layer_style.fillOpacity = 0.2;
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layer_style.graphicOpacity = 1;
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/*
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* Blue style
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*/
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var style_blue = OpenLayers.Util.extend({}, layer_style);
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style_blue.strokeColor = "blue";
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style_blue.fillColor = "blue";
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style_blue.externalGraphic = "../img/marker.png";
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// each of the three lines below means the same, if only one of
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// them is active: the image will have a size of 24px, and the
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// aspect ratio will be kept
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style_blue.pointRadius = 12;
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//style_blue.graphicWidth = 24;
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//style_blue.graphicHeight = 24;
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/*
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* Green style
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*/
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var style_green = {
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strokeColor: "#00FF00",
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strokeOpacity: 1,
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strokeWidth: 3,
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pointRadius: 6,
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pointerEvents: "visiblePainted"
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};
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/*
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* Mark style
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*/
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var style_mark = OpenLayers.Util.extend({}, OpenLayers.Feature.Vector.style['default']);
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// if graphicWidth and graphicHeight are both set, the aspect ratio
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// of the image will be ignored
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style_mark.graphicWidth = 24;
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style_mark.graphicHeight = 20;
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style_mark.graphicXOffset = -(style_mark.graphicWidth/2); // this is the default value
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style_mark.graphicYOffset = -style_mark.graphicHeight;
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style_mark.externalGraphic = "../img/marker.png";
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var vectorLayer = new OpenLayers.Layer.Vector("Simple Geometry", {style: layer_style});
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// create a point feature
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var point = new OpenLayers.Geometry.Point(-111.04, 45.68);
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var pointFeature = new OpenLayers.Feature.Vector(point,null,style_blue);
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var point2 = new OpenLayers.Geometry.Point(-105.04, 49.68);
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var pointFeature2 = new OpenLayers.Feature.Vector(point2,null,style_green);
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var point3 = new OpenLayers.Geometry.Point(-105.04, 49.68);
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var pointFeature3 = new OpenLayers.Feature.Vector(point3,null,style_mark);
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// create a line feature from a list of points
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var pointList = [];
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var newPoint = point;
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for(var p=0; p<5; ++p) {
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newPoint = new OpenLayers.Geometry.Point(newPoint.x + Math.random(1),
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newPoint.y + Math.random(1));
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pointList.push(newPoint);
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}
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var lineFeature = new OpenLayers.Feature.Vector(
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new OpenLayers.Geometry.LineString(pointList),null,style_green);
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// create a polygon feature from a linear ring of points
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var pointList = [];
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for(var p=0; p<6; ++p) {
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var a = p * (2 * Math.PI) / 7;
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var r = Math.random(1) + 1;
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var newPoint = new OpenLayers.Geometry.Point(point.x + (r * Math.cos(a)),
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point.y + (r * Math.sin(a)));
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pointList.push(newPoint);
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}
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pointList.push(pointList[0]);
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var linearRing = new OpenLayers.Geometry.LinearRing(pointList);
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var polygonFeature = new OpenLayers.Feature.Vector(
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new OpenLayers.Geometry.Polygon([linearRing]));
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map.addLayer(vectorLayer);
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map.setCenter(new OpenLayers.LonLat(point.x, point.y), 5);
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vectorLayer.addFeatures([pointFeature, pointFeature3, pointFeature2, lineFeature, polygonFeature]);
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}
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</script>
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</head>
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<body onload="init()">
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<div id="map"></div>
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<p>This example shows drawing simple vector features -- point, line, polygon
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in different styles, created 'manually', by constructing the entire style
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object, via 'copy', extending the default style object, and by
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inheriting the default style from the layer.</p>
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<p>It also shows how to use external graphic files for point features
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and how to set their size: If either graphicWidth or graphicHeight is set,
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the aspect ratio of the image will be respected. If both graphicWidth and
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graphicHeight are set, it will be ignored. Alternatively, if graphicWidth
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and graphicHeight are omitted, pointRadius will be used to set the size
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of the image, which will then be twice the value of pointRadius with the
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original aspect ratio.</p>
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</body>
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</html>
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