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add an example of how to use a WKT string in a vector source

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This commit is contained in:
Bart van den Eijnden
2013-11-11 12:45:06 +01:00
parent fdad53c619
commit 3f7c40b1ad
3 changed files with 109 additions and 0 deletions
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55
examples/wkt.html Normal file
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@@ -0,0 +1,55 @@
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="chrome=1">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<link rel="stylesheet" href="../css/ol.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<title>WKT example</title>
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<a class="brand" href="./"><img src="../resources/logo.png"> OpenLayers 3 Examples</a>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"></div>
</div>
</div>
<div class="row-fluid">
<div class="span4">
<h4 id="title">WKT example</h4>
<p id="shortdesc">Example of using the WKT parser.</p>
<div id="docs">
<p>See the <a href="wkt.js" target="_blank">wkt.js source</a> to see how this is done.</p>
</div>
<div id="tags">WKT Well Known Text</div>
</div>
<div class="span4 offset4">
<div id="info" class="alert alert-success">
&nbsp;
</div>
</div>
</div>
</div>
<script src="jquery.min.js" type="text/javascript"></script>
<script src="loader.js?id=wkt" type="text/javascript"></script>
<script src="../resources/example-behaviour.js" type="text/javascript"></script>
</body>
</html>

33
examples/wkt.js Normal file
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@@ -0,0 +1,33 @@
goog.require('ol.Map');
goog.require('ol.RendererHint');
goog.require('ol.View2D');
goog.require('ol.layer.Tile');
goog.require('ol.layer.Vector');
goog.require('ol.parser.WKT');
goog.require('ol.proj');
goog.require('ol.source.OSM');
goog.require('ol.source.Vector');
var raster = new ol.layer.Tile({
source: new ol.source.OSM()
});
var vector = new ol.layer.Vector({
source: new ol.source.Vector({
parser: new ol.parser.WKT(),
projection: ol.proj.get('EPSG:4326'),
data: 'POLYGON((10.689697265625 -25.0927734375, 34.595947265625 ' +
'-20.1708984375, 38.814697265625 -35.6396484375, 13.502197265625 ' +
'-39.1552734375, 10.689697265625 -25.0927734375))'
})
});
var map = new ol.Map({
layers: [raster, vector],
renderer: ol.RendererHint.CANVAS,
target: 'map',
view: new ol.View2D({
center: [2952104.019976033, -3277504.823700756],
zoom: 4
})
});

21
src/ol/parser/wktparser.js
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@@ -2,6 +2,7 @@ goog.provide('ol.parser.WKT');
goog.require('goog.array');
goog.require('goog.string');
goog.require('ol.Feature');
goog.require('ol.geom.Geometry');
goog.require('ol.geom.GeometryCollection');
goog.require('ol.geom.LineString');
@@ -11,12 +12,14 @@ goog.require('ol.geom.MultiPolygon');
goog.require('ol.geom.Point');
goog.require('ol.geom.Polygon');
goog.require('ol.parser.Parser');
goog.require('ol.parser.StringFeatureParser');
/**
* @constructor
* @extends {ol.parser.Parser}
* @implements {ol.parser.StringFeatureParser}
* @todo stability experimental
*/
ol.parser.WKT = function() {
@@ -341,6 +344,24 @@ ol.parser.WKT.prototype.read = function(str) {
};
/**
* Parse a WKT document provided as a string.
* @param {string} str WKT document.
* @return {ol.parser.ReadFeaturesResult} Features and metadata.
*/
ol.parser.WKT.prototype.readFeaturesFromString = function(str) {
var geom = this.read(str);
var obj = /** @type {ol.parser.ReadFeaturesResult} */
({});
if (goog.isDef(geom)) {
var feature = new ol.Feature();
feature.setGeometry(geom);
obj.features = [feature];
}
return obj;
};
/**
* Write out a geometry as a WKT string.
* @param {ol.geom.Geometry} geom The geometry to encode.