7da6a3540e
thanks to all the contributors who helped put this together. I'm not exactly sure of what's going to happen with this, but for now, at http://openlayers.org/dev/doc/examples.html you can see links to all the examples *with descriptions*. Hooray! git-svn-id: http://svn.openlayers.org/trunk/openlayers@5362 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
160 lines
5.4 KiB
HTML
160 lines
5.4 KiB
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>WKT</title>
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<style type="text/css">
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#info {
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position: absolute;
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top: 70px;
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left: 550px;
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width: 350px;
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}
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#map {
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width: 512px;
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height: 512px;
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border: 1px solid gray;
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}
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#controls {
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width: 512px;
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}
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#wktInput {
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float: right;
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}
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#controlToggle {
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padding-left: 1em;
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}
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#controlToggle li {
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list-style: none;
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}
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</style>
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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, wkt;
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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.LayerSwitcher());
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map.addControl(new OpenLayers.Control.MousePosition());
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var options = {
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hover: true,
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onSelect: displayWKT
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};
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drawControls = {
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point: new OpenLayers.Control.DrawFeature(vectors,
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OpenLayers.Handler.Point),
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line: new OpenLayers.Control.DrawFeature(vectors,
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OpenLayers.Handler.Path),
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polygon: new OpenLayers.Control.DrawFeature(vectors,
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OpenLayers.Handler.Polygon),
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hover: new OpenLayers.Control.SelectFeature(vectors, options)
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};
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for(var key in drawControls) {
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map.addControl(drawControls[key]);
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}
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wkt = new OpenLayers.Format.WKT();
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map.setCenter(new OpenLayers.LonLat(0, 0), 3);
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document.getElementById('noneToggle').checked = true;
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}
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function toggleControl(element) {
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for(key in drawControls) {
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var control = drawControls[key];
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if(element.value == key && element.checked) {
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control.activate();
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} else {
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control.deactivate();
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}
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}
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}
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function displayWKT(feature) {
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var str = wkt.write(feature);
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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('info').innerHTML = str;
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}
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function parseWKT() {
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var element = document.getElementById('wkt');
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var features = wkt.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 = 'Feature' + plural + ' added'
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} else {
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element.value = 'Bad WKT';
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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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<h1 id="title">WKT Example</h1>
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<div id="info"></div>
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<p id="shortdesc">
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Shows the use of WKT (Well known text) to draw features in openlayers
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</p>
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<div id="map"></div>
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<div id="tags"></div>
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<div id="docs">
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<div id="controls">
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<p>See <a href="http://en.wikipedia.org/wiki/Well-known_text#Geometric_Objects">Wikipedia</a>
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for a description and examples of WKT.</p>
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<div id="wktInput">
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<textarea id="wkt" rows="6" cols="30">paste WKT here...</textarea>
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<br />
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<input type="button" value="add feature" onclick="parseWKT();" />
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</div>
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<ul id="controlToggle">
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<li>
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<input type="radio" name="type" value="none" id="noneToggle"
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onclick="toggleControl(this);" checked="checked" />
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<label for="noneToggle">navigate</label>
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</li>
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<li>
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<input type="radio" name="type" value="point" id="pointToggle" onclick="toggleControl(this);" />
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<label for="pointToggle">draw point</label>
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</li>
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<li>
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<input type="radio" name="type" value="line" id="lineToggle" onclick="toggleControl(this);" />
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<label for="lineToggle">draw line</label>
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</li>
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<li>
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<input type="radio" name="type" value="polygon" id="polygonToggle" onclick="toggleControl(this);" />
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<label for="polygonToggle">draw polygon</label>
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</li>
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<li>
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<input type="radio" name="type" value="hover" id="hoverToggle"
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onclick="toggleControl(this);" />
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<label for="hoverToggle">view WKT for feature</label>
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</li>
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</ul>
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</div>
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</div>
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</body>
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</html>
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