mirror of
https://github.com/Viglino/ol-ext.git
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169 lines
5.1 KiB
HTML
169 lines
5.1 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<!--
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Copyright (c) 2015-2018 Jean-Marc VIGLINO,
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released under CeCILL-B (french BSD like) licence: http://www.cecill.info/
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-->
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<title>ol-ext: hash lines example</title>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="description" content="an OL3 stroke style with a set of cartographic patterns to use in your maps." />
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<meta name="keywords" content="ol3, vector, style, stroke, fill, pattern, hatch, hatching" />
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<link rel="stylesheet" href="../style.css" />
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<!-- jQuery -->
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<script type="text/javascript" src="https://code.jquery.com/jquery-1.11.0.min.js"></script>
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<!-- FontAwesome -->
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
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<!-- Openlayers -->
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<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@latest/ol.css" />
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<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/ol@latest/dist/ol.js"></script>
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<!-- ol-ext -->
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<script type="text/javascript" src="../../dist/ol-ext.js"></script>
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<!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
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<script src="https://unpkg.com/elm-pep"></script>
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</head>
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<body >
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<a href="https://github.com/Viglino/ol-ext" class="icss-github-corner"><i></i></a>
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<a href="../../index.html">
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<h1>ol-ext: hash lines example</h1>
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</a>
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<div class="info">
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<p>
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This example use the <i>ol.coordinate.offsetCoords()</i> function to draw an offset line with a dash symbol.
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</p>
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<p>
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NB: some problem may occur when offsetting lines with acute convex angles...
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You should probably look at <a href="https://openlayers.org/en/latest/examples/jsts.html">JSTS</a> to handle this cases.
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</p>
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</div>
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<!-- Map div -->
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<div id="map" style="width:600px; height:400px;"></div>
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<div class="options" style="min-width:300px;">
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<h2>Options:</h2>
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<ul>
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<li>
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Draw:
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<label>
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<input type="radio" name="op" value="drawPoly" />
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Polygon
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</label>
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<label>
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<input type="radio" name="op" checked="checked" value="drawLine" />
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LineString
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</label>
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<label>
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<input type="radio" name="op" value="modify" />
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Modify
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</label>
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</li>
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<li>
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<hr/>
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Offset: <input id="offset" type="number" value=5 onchange="vector.changed()" />
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</li>
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</ul>
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</div>
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<script type="text/javascript">
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// Layers
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var layer = new ol.layer.Geoportail({ layer: 'ORTHOIMAGERY.ORTHOPHOTOS' });
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// The map
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var map = new ol.Map({
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target: 'map',
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view: new ol.View ({
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zoom: 5,
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center: [166326, 5992663]
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}),
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layers: [layer]
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});
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// Offset geometry
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function offsetGeometry (feature, size) {
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switch (feature.getGeometry().getType()) {
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case 'Polygon':
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var coords = feature.getGeometry().getCoordinates();
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var sign = feature.getGeometry().getLinearRing(0).getArea() < 0 ? -1 : 1;
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coords[0] = ol.coordinate.offsetCoords(coords[0], sign*size);
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return new ol.geom.Polygon(coords);
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case 'LineString':
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var coords = feature.getGeometry().getCoordinates();
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coords = ol.coordinate.offsetCoords(coords, size);
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return new ol.geom.LineString(coords);
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default:
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return feature.getGeometry();
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}
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}
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// Style function with offset hash
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function getStyle(feature, res){
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var offset = parseInt($("#offset").val());
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return [
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new ol.style.Style({
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stroke: new ol.style.Stroke({
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width: 1.5,
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color: "#8B4513"
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})
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}),
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new ol.style.Style({
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stroke: new ol.style.Stroke({
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color: "#8B4513",
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width: offset>0 ? 2*offset : -2*offset,
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lineDash:[1.5,10],
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lineCap:'butt',
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lineJoin:'bevel'
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}),
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// Offset geometry
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geometry: function (feature) { return offsetGeometry(feature, offset*res); }
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})
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];
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}
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// Nouvelle source de donnee
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var vector = new ol.layer.Vector({
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source: new ol.source.Vector({ features: new ol.Collection() }),
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style: getStyle
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})
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map.addLayer(vector);
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vector.getSource().addFeature(new ol.Feature(new ol.geom.Polygon([[[259274, 6398696], [63595, 5958419], [635956, 5772524], [259274, 6398696]]])));
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// global so we can remove it later
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var interactions = {
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select: new ol.interaction.Select (),
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modify: new ol.interaction.Modify ({ features: vector.getSource().getFeaturesCollection() }),
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drawLine: new ol.interaction.Draw({
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type: 'LineString',
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source: vector.getSource()
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}),
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drawPoly: new ol.interaction.Draw({
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type: 'Polygon',
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source: vector.getSource()
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})
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}
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for (var i in interactions) map.addInteraction(interactions[i]);
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// Activate interaction
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setInteraction = function() {
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//interactions.select.getFeatures().clear();
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var name = $('[name="op"]:checked').val();
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for (var i in interactions) {
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interactions[i].set("active", (i==name));
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}
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}
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setInteraction();
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$("input:radio").on("change",setInteraction);
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</script>
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</body>
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</html> |