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SubmarineMonitoring/common/plugin/map/ol/v6.12.0/examples/hitdetect-vector.html

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海底监测与灾害预警系统管理平台界面
2 weeks ago
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" type="text/css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="./resources/prism/prism-1.20.0.css" type="text/css">
<link rel="stylesheet" href="./css/ol.css" type="text/css">
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<title>Vector Layer Hit Detection</title>
</head>
<body>
<header class="navbar navbar-expand-sm navbar-dark mb-3 py-0" role="navigation">
<a class="navbar-brand" href="https://openlayers.org/"><img src="./resources/logo-70x70.png" alt="">&nbsp;OpenLayers</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#olmenu" aria-controls="olmenu" aria-expanded="false" aria-label="Toggle navigation">
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This example uses OpenLayers v<span>6.12.0</span>. The <a id="latest-link" href="#" class="alert-link">latest</a> is v<span id="latest-version"></span>.
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<i class="fa fa-codepen fa-lg"></i> Edit
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<div class="span12">
<h4 id="title">Vector Layer Hit Detection</h4>
<p class="tags">
<span class="badge-group">
<a
href="./index.html?q=vector" class="badge badge-info">vector</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="vector"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./mapbox-vector-tiles-advanced.html&quot;&gt;Advanced Mapbox Vector Tiles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./animated-gif.html&quot;&gt;Animated GIF&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-esri.html&quot;&gt;ArcGIS REST Feature Service&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./cluster.html&quot;&gt;Clustered Features&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./feature-animation.html&quot;&gt;Custom Animation&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./custom-circle-render.html&quot;&gt;Custom Circle Render&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./custom-hit-detection-renderer.html&quot;&gt;Custom Hit Detection Render&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./custom-interactions.html&quot;&gt;Custom Interactions&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./polygon-styles.html&quot;&gt;Custom Polygon Styles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./drag-and-drop-image-vector.html&quot;&gt;Drag-and-Drop Image Vector&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./draw-and-modify-features.html&quot;&gt;Draw and Modify Features&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./draw-and-modify-geodesic.html&quot;&gt;Draw and Modify Geodesic Circles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./draw-features.html&quot;&gt;Draw Features&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./draw-shapes.html&quot;&gt;Draw Shapes&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./clusters-dynamic.html&quot;&gt;Dynamic clusters&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./earthquake-clusters.html&quot;&gt;Earthquake Clusters&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./heatmap-earthquakes.html&quot;&gt;Earthquakes Heatmap&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./kml-earthquakes.html&quot;&gt;Earthquakes in KML&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./earthquake-custom-symbol.html&quot;&gt;Earthquakes with custom symbols&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-esri-edit.html&quot;&gt;Editable ArcGIS REST Feature Service&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./flight-animation.html&quot;&gt;Flight Animation&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./fractal.html&quot;&gt;Fractal Rendering&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./draw-freehand.html&quot;&gt;Freehand Drawing&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./geojson.html&quot;&gt;GeoJSON&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./geojson-vt.html&quot;&gt;geojson-vt integration&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./icon-color.html&quot;&gt;Icon Colors&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./modify-icon.html&quot;&gt;Icon modification&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./icon-negative.html&quot;&gt;Icon Pixel Operations&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./icon-scale.html&quot;&gt;Icon Scale&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./icon.html&quot;&gt;Icon Symbolizer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./jsts.html&quot;&gt;JSTS Integration&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./line-arrows.html&quot;&gt;LineString Arrows&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./mapbox-vector-layer.html&quot;&gt;Mapbox Vector Layer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./mapbox-vector-tiles.html&quot;&gt;Mapbox Vector Tiles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./mapbox-layer.html&quot;&gt;Mapbox-gl Layer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./measure.html&quot;&gt;Measure&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./measure-style.html&quot;&gt;Measure using vector styles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./modify-features.html&quot;&gt;Modify Features&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./modify-test.html&quot;&gt;Modify Features Test&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./ogc-vector-tiles.html&quot;&gt;OGC Vector Tiles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./osm-vector-tiles.html&quot;&gt;OSM Vector Tiles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-osm.html&quot;&gt;OSM XML&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./regularshape.html&quot;&gt;Regular Shapes&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./modify-scale-and-rotate.html&quot;&gt;Scale and Rotate using Modify Interaction&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./select-features.html&quot;&gt;Select Features&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./select-hover-features.html&quot;&gt;Select Features by Hover&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./select-multiple-features.html&quot;&gt;Select multiple Features&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./snap.html&quot;&gt;Snap Interaction&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./street-labels.html&quot;&gt;Street Labels&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./style-renderer.html&quot;&gt;Style renderer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./synthetic-lines.html&quot;&gt;Synthetic Lines&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./synthetic-points.html&quot;&gt;Synthetic Points&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./kml-timezones.html&quot;&gt;Timezones in KML&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./topojson.html&quot;&gt;TopoJSON&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./topolis.html&quot;&gt;topolis integration&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./tracing.html&quot;&gt;Tracing around a polygon&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./translate-features.html&quot;&gt;Translate Features&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./turf.html&quot;&gt;turf.js&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./layer-clipping-vector.html&quot;&gt;Vector Clipping Layer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./image-vector-layer.html&quot;&gt;Vector Image Layer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-label-decluttering.html&quot;&gt;Vector Label Decluttering&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-labels.html&quot;&gt;Vector Labels&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-layer.html&quot;&gt;Vector Layer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./hitdetect-vector.html&quot;&gt;Vector Layer Hit Detection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-wfs.html&quot;&gt;WFS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-wfs-getfeature.html&quot;&gt;WFS - GetFeature&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-wfs-geographic.html&quot;&gt;WFS with geographic coordinates&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wind-arrows.html&quot;&gt;Wind Arrows&lt;/a&gt;"
tabindex="0"
>68</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=geojson" class="badge badge-info">geojson</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="geojson"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./drag-and-drop.html&quot;&gt;Drag-and-Drop&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./drag-and-drop-image-vector.html&quot;&gt;Drag-and-Drop Image Vector&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./geojson.html&quot;&gt;GeoJSON&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./geojson-vt.html&quot;&gt;geojson-vt integration&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./style-renderer.html&quot;&gt;Style renderer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-labels.html&quot;&gt;Vector Labels&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-layer.html&quot;&gt;Vector Layer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./hitdetect-vector.html&quot;&gt;Vector Layer Hit Detection&lt;/a&gt;"
tabindex="0"
>8</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=click" class="badge badge-info">click</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="click"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./hitdetect-vector.html&quot;&gt;Vector Layer Hit Detection&lt;/a&gt;"
tabindex="0"
>1</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=hover" class="badge badge-info">hover</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="hover"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./hitdetect-vector.html&quot;&gt;Vector Layer Hit Detection&lt;/a&gt;"
tabindex="0"
>1</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=hitdetection" class="badge badge-info">hitdetection</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="hitdetection"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./hitdetect-vector.html&quot;&gt;Vector Layer Hit Detection&lt;/a&gt;"
tabindex="0"
>1</a>
</span>
</p>
<div class="modal modal-tag-example" id="tag-example-list" tabindex="-1" role="dialog" aria-labelledby="tag-example-title" aria-hidden="true">
<div class="modal-dialog modal-dialog-scrollable" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="tag-example-title"></h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">&times;</span>
</button>
</div>
<div class="modal-body">
<div class="list-group"></div>
</div>
</div>
</div>
</div>
<div id="map" class="map"></div>
<div id="info">&nbsp;</div>
</div>
<form method="POST" id="codepen-form" target="_blank" action="https://codesandbox.io/api/v1/sandboxes/define">
<input id="codesandbox-params" type="hidden" name="parameters">
</form>
</div>
<div class="row-fluid">
<div class="span12">
<p id="shortdesc">Example of hit detection on an ecoregions vector layer with protection status.</p>
<div id="docs"><p>The ecoregions are loaded from a GeoJSON file. Information about features is retrieved using the layer&#39;s <code>getFeatures()</code> method on hover and click. For vector layers, this function resolves with an array of only the topmost feature. It uses an efficient hit detection algorithm, at the cost of accuracy. For pixel exact hit detection, when performance is not a concern, use the map&#39;s <code>getFeaturesAtPixel()</code> or <code>forEachFeatureAtPixel()</code> methods.</p>
</div>
</div>
</div>
<div class="row-fluid">
<h5 class="source-heading">main.js</h5>
<pre><code id="example-js-source" class="language-js">import 'ol/ol.css';
import GeoJSON from &#x27;ol/format/GeoJSON&#x27;;
import Map from &#x27;ol/Map&#x27;;
import VectorLayer from &#x27;ol/layer/Vector&#x27;;
import VectorSource from &#x27;ol/source/Vector&#x27;;
import View from &#x27;ol/View&#x27;;
import {Fill, Stroke, Style} from &#x27;ol/style&#x27;;
const style &#x3D; new Style({
fill: new Fill({
color: &#x27;#eeeeee&#x27;,
}),
});
const vectorLayer &#x3D; new VectorLayer({
background: &#x27;#1a2b39&#x27;,
source: new VectorSource({
url: &#x27;https://openlayers.org/data/vector/ecoregions.json&#x27;,
format: new GeoJSON(),
}),
style: function (feature) {
const color &#x3D; feature.get(&#x27;COLOR_NNH&#x27;) || &#x27;#eeeeee&#x27;;
style.getFill().setColor(color);
return style;
},
});
const map &#x3D; new Map({
layers: [vectorLayer],
target: &#x27;map&#x27;,
view: new View({
center: [0, 0],
zoom: 1,
}),
});
const highlightStyle &#x3D; new Style({
stroke: new Stroke({
color: &#x27;rgba(255, 255, 255, 0.7)&#x27;,
width: 2,
}),
});
const featureOverlay &#x3D; new VectorLayer({
source: new VectorSource(),
map: map,
style: highlightStyle,
});
let highlight;
const displayFeatureInfo &#x3D; function (pixel) {
vectorLayer.getFeatures(pixel).then(function (features) {
const feature &#x3D; features.length ? features[0] : undefined;
const info &#x3D; document.getElementById(&#x27;info&#x27;);
if (features.length) {
info.innerHTML &#x3D; feature.get(&#x27;ECO_NAME&#x27;) + &#x27;: &#x27; + feature.get(&#x27;NNH_NAME&#x27;);
} else {
info.innerHTML &#x3D; &#x27;&amp;nbsp;&#x27;;
}
if (feature !&#x3D;&#x3D; highlight) {
if (highlight) {
featureOverlay.getSource().removeFeature(highlight);
}
if (feature) {
featureOverlay.getSource().addFeature(feature);
}
highlight &#x3D; feature;
}
});
};
map.on(&#x27;pointermove&#x27;, function (evt) {
if (evt.dragging) {
return;
}
const pixel &#x3D; map.getEventPixel(evt.originalEvent);
displayFeatureInfo(pixel);
});
map.on(&#x27;click&#x27;, function (evt) {
displayFeatureInfo(evt.pixel);
});
</code></pre>
</div>
<div class="row-fluid">
<h5 class="source-heading">index.html</h5>
<pre><code id="example-html-source" class="language-markup">&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
&lt;meta charset="UTF-8"&gt;
&lt;title&gt;Vector Layer Hit Detection&lt;/title&gt;
&lt;!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer --&gt;
&lt;script src="https://unpkg.com/elm-pep"&gt;&lt;/script&gt;
&lt;!-- The lines below are only needed for old environments like Internet Explorer and Android 4.x --&gt;
&lt;script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=fetch,requestAnimationFrame,Element.prototype.classList,TextDecoder"&gt;&lt;/script&gt;
&lt;script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/3.18.3/minified.js"&gt;&lt;/script&gt;
&lt;style&gt;
.map {
width: 100%;
height:400px;
}
&lt;/style&gt;
&lt;/head&gt;
&lt;body&gt;
&lt;div id&#x3D;&quot;map&quot; class&#x3D;&quot;map&quot;&gt;&lt;/div&gt;
&lt;div id&#x3D;&quot;info&quot;&gt;&amp;nbsp;&lt;/div&gt;
&lt;script src="main.js"&gt;&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;</code></pre>
</div>
<div class="row-fluid">
<h5 class="source-heading">package.json</h5>
<pre><code id="example-pkg-source" class="language-json">{
&quot;name&quot;: &quot;hitdetect-vector&quot;,
&quot;dependencies&quot;: {
&quot;ol&quot;: &quot;6.12.0&quot;
},
&quot;devDependencies&quot;: {
&quot;parcel&quot;: &quot;^2.0.0&quot;
},
&quot;scripts&quot;: {
&quot;start&quot;: &quot;parcel index.html&quot;,
&quot;build&quot;: &quot;parcel build --public-url . index.html&quot;
}
}</code></pre>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.bundle.min.js"></script>
<script src="./resources/prism/prism-1.20.0.min.js"></script>
<script src="./resources/common.js"></script>
<script src="common.js"></script>
<script src="hitdetect-vector.js"></script>
<script>
$('#tag-example-list').on('show.bs.modal', function (event) {
const button = $(event.relatedTarget); // Button that triggered the modal
const title = button.data('title');
const content = button.data('content');
const modal = $(this)
modal.find('.modal-title').text(title);
modal.find('.modal-body').html(content);
});
var packageUrl = 'https://raw.githubusercontent.com/openlayers/openlayers.github.io/build/package.json';
fetch(packageUrl).then(function(response) {
return response.json();
}).then(function(json) {
var latestVersion = json.version;
document.getElementById('latest-version').innerHTML = latestVersion;
var url = window.location.href;
var branchSearch = url.match(/\/([^\/]*)\/examples\//);
var cookieText = 'dismissed=-' + latestVersion + '-';
var dismissed = document.cookie.indexOf(cookieText) != -1;
if (branchSearch && !dismissed && /^v[0-9\.]*$/.test(branchSearch[1]) && '6.12.0' != latestVersion) {
var link = url.replace(branchSearch[0], '/latest/examples/');
fetch(link, {method: 'head'}).then(function(response) {
var a = document.getElementById('latest-link');
a.href = response.status == 200 ? link : '../../latest/examples/';
});
var latestCheck = document.getElementById('latest-check');
latestCheck.style.display = '';
document.getElementById('latest-dismiss').onclick = function() {
latestCheck.style.display = 'none';
document.cookie = cookieText;
}
}
});
</script>
</body>
</html>