1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>OpenLayers Resize Features Example</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"> p { width: 500px; } </style> <script src="../lib/OpenLayers.js"></script> <script type="text/javascript"> var map, vectorLayer, pointFeature, lineFeature, polygonFeature; function init(){ map = new OpenLayers.Map('map'); var layer = new OpenLayers.Layer.WMS( "OpenLayers WMS", "http://labs.metacarta.com/wms/vmap0", {layers: 'basic'} ); map.addLayer(layer); var style_blue = OpenLayers.Util.extend({}, OpenLayers.Feature.Vector.style['default']); style_blue.strokeColor = "blue"; style_blue.fillColor = "blue"; var style_green = { strokeColor: "#339933", strokeOpacity: 1, strokeWidth: 3, pointRadius: 6, pointerEvents: "visiblePainted" }; vectorLayer = new OpenLayers.Layer.Vector("Simple Geometry"); // create a point feature var point = new OpenLayers.Geometry.Point(-110, 45); pointFeature = new OpenLayers.Feature.Vector(point, null, style_blue); // create a line feature from a list of points var pointList = []; var newPoint = point; for(var p=0; p<5; ++p) { newPoint = new OpenLayers.Geometry.Point(newPoint.x + Math.random(1), newPoint.y + Math.random(1)); pointList.push(newPoint); } lineFeature = new OpenLayers.Feature.Vector( new OpenLayers.Geometry.LineString(pointList),null,style_green); // create a polygon feature from a linear ring of points var pointList = []; for(var p=0; p<6; ++p) { var a = p * (2 * Math.PI) / 7; var r = Math.random(1) + 1; var newPoint = new OpenLayers.Geometry.Point(point.x + (r * Math.cos(a)), point.y + (r * Math.sin(a))); pointList.push(newPoint); } pointList.push(pointList[0]); var linearRing = new OpenLayers.Geometry.LinearRing(pointList); polygonFeature = new OpenLayers.Feature.Vector( new OpenLayers.Geometry.Polygon([linearRing])); map.addLayer(vectorLayer); map.setCenter(new OpenLayers.LonLat(point.x, point.y), 5); vectorLayer.addFeatures([pointFeature, lineFeature, polygonFeature]); } var origin = new OpenLayers.Geometry.Point(-111.04, 45.68); function resizeFeatures(scale) { pointFeature.geometry.resize(scale, origin); lineFeature.geometry.resize(scale, origin); polygonFeature.geometry.resize(scale, origin); vectorLayer.redraw(); } </script> </head> <body onload="init()"> <h3 id="title">Resize Features Programatically</h3> <p id="shortdesc"> Demonstration of how to use the geometry resize methods to change feature sizes programatically. </p> <div id="map" class="smallmap"></div> <p>This example demonstrates how features can be resized. There is not yet a control built that provides a tool for resizing, but the geometry.resize method can be accessed to resize programmatically.</p> <p>Make the features <a href="javascript: resizeFeatures(1.5);">bigger</a> or <a href="javascript: resizeFeatures(1 / 1.5);">smaller</a>. </body> </html> |