9d1baf68f7
git-svn-id: http://svn.openlayers.org/trunk/openlayers@4222 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
166 lines
5.7 KiB
HTML
166 lines
5.7 KiB
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Vector Formats</title>
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<style type="text/css">
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html, body {
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margin: 0;
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padding: 1em;
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font: 0.9em Verdana, Arial, sans serif;
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}
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input, select, textarea {
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font: 0.9em Verdana, Arial, sans-serif;
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}
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h2 {
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margin-top: 0.75em;
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font-size: 1.6em;
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}
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#leftcol {
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position: absolute;
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top: 0;
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left: 1em;
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padding: 0;
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width: 455px;
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}
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#map {
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width: 450px;
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height: 225px;
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border: 1px solid #ccc;
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}
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#input {
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width: 450px;
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}
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#text {
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font-size: 0.85em;
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margin: 1em 0 1em 0;
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width: 100%;
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height: 10em;
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}
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#info {
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position: relative;
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padding: 2em 0;
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margin-left: 470px;
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}
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#output {
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font-size: 0.8em;
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width: 100%;
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height: 500px;
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border: 0;
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}
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p {
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margin: 0;
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padding: 0.75em 0 0.75em 0;
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}
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</style>
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<script src="../lib/Firebug/firebug.js"></script>
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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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var map, vectors, drawControls, formats, select;
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function init(){
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map = new OpenLayers.Map('map');
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var wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
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"http://labs.metacarta.com/wms/vmap0?", {layers: 'basic'});
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vectors = new OpenLayers.Layer.Vector("Vector Layer");
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map.addLayers([wms, vectors]);
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map.addControl(new OpenLayers.Control.MousePosition());
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map.addControl(new OpenLayers.Control.EditingToolbar(vectors));
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var options = {
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hover: true,
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onSelect: serialize
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};
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select = new OpenLayers.Control.SelectFeature(vectors, options);
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map.addControl(select);
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select.activate();
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formats = {
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wkt: new OpenLayers.Format.WKT(),
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geojson: new OpenLayers.Format.GeoJSON()
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};
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map.setCenter(new OpenLayers.LonLat(0, 0), 1);
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}
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function serialize(feature) {
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var type = document.getElementById("formatType").value;
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// second argument for pretty printing (geojson only)
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var pretty = document.getElementById("prettyPrint").checked;
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var str = formats[type].write(feature, pretty);
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// not a good idea in general, just for this demo
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str = str.replace(/,/g, ', ');
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document.getElementById('output').value = str;
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}
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function deserialize() {
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var element = document.getElementById('text');
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var type = document.getElementById("formatType").value;
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var features = formats[type].read(element.value);
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var bounds;
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if(features) {
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if(features.constructor != Array) {
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features = [features];
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}
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for(var i=0; i<features.length; ++i) {
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if (!bounds) {
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bounds = features[i].geometry.getBounds();
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} else {
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bounds.extend(features[i].geometry.getBounds());
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}
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}
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vectors.addFeatures(features);
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map.zoomToExtent(bounds);
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var plural = (features.length > 1) ? 's' : '';
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element.value = features.length + ' feature' + plural + ' added'
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} else {
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element.value = 'Bad input ' + type;
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}
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}
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// preload images
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(function() {
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var roots = ["draw_point", "draw_line", "draw_polygon", "pan"];
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var onImages = [];
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var offImages = [];
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for(var i=0; i<roots.length; ++i) {
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onImages[i] = new Image();
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onImages[i].src = "../theme/default/img/" + roots[i] + "_on.png";
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offImages[i] = new Image();
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offImages[i].src = "../theme/default/img/" + roots[i] + "_on.png";
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}
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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="leftcol">
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<h2>OpenLayers Vector Formats Example</h2>
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<div id="map"></div>
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<div id="input">
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<p>Use the drop-down below to select the input/output format
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for vector features. New features can be added by using the drawing
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tools above or by pasting their text representation below.</p>
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<label for="formatType">Format</label>
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<select name="formatType" id="formatType">
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<option value="geojson" selected="selected">GeoJSON</option>
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<option value="wkt">Well-Known Text (WKT)</option>
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</select>
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<label for="prettyPrint">Pretty print</label>
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<input id="prettyPrint" type="checkbox"
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name="prettyPrint" value="1" />
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<br />
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<textarea id="text">paste text here...</textarea>
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<br />
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<input type="button" value="add feature" onclick="deserialize();" />
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</div>
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</div>
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<div id="info">
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<p>Use the tools to the left to draw new polygons, lines, and points.
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After drawing some new features, hover over a feature to see the
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serialized version below.</p>
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<textarea id="output"></textarea>
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</div>
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</body>
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</html>
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