原文链接及内容

这个例子展示了如何使用Extent
交互来绘制可修改的extent。
使用Shift+Drag
绘制范围。Shift+拖动范围的角或边缘
来调整它的大小。Shift+点击
关闭范围删除它。
main.js
代码如下:
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| import ExtentInteraction from 'ol/interaction/Extent.js'; import Map from 'ol/Map.js'; import OSM from 'ol/source/OSM.js'; import TileLayer from 'ol/layer/Tile.js'; import View from 'ol/View.js'; import {shiftKeyOnly} from 'ol/events/condition.js';
const map = new Map({ layers: [ new TileLayer({ source: new OSM(), }), ], target: 'map', view: new View({ center: [0, 0], zoom: 2, }), });
const extent = new ExtentInteraction({condition: shiftKeyOnly}); map.addInteraction(extent);
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界面布局文件index.html
代码如下:
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| <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Extent Interaction</title> <link rel="stylesheet" href="node_modules/ol/ol.css"> <style> .map { width: 100%; height: 400px; } </style> </head> <body> <div id="map" class="map"></div> <script src="https://cdn.jsdelivr.net/npm/elm-pep@1.0.6/dist/elm-pep.js"></script> <script type="module" src="main.js"></script> </body> </html>
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