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Attributions

发布于 2022-11-30 23:36:02 字数 2549 浏览 0 评论 0 收藏 0

Example of a attributions visibily change on map resize, to collapse them on small maps.

本示例演示当地图由于 resize 而变得太小的时候，版权所属信息会收缩起来。这是因为窗口监听，当地图小于 600 像素的时候，将 collapsible 的属性设置为 true。

main.js

import 'ol/ol.css';
import Map from 'ol/Map';
import OSM from 'ol/source/OSM';
import TileLayer from 'ol/layer/Tile';
import View from 'ol/View';
import {Attribution, defaults as defaultControls} from 'ol/control';

const attribution = new Attribution({
  collapsible: false,
});
const map = new Map({
  layers: [
    new TileLayer({
      source: new OSM(),
    }),
  ],
  controls: defaultControls({attribution: false}).extend([attribution]),
  target: 'map',
  view: new View({
    center: [0, 0],
    zoom: 2,
  }),
});

function checkSize() {
  const small = map.getSize()[0] < 600;
  attribution.setCollapsible(small);
  attribution.setCollapsed(small);
}

window.addEventListener('resize', checkSize);
checkSize();

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Attributions</title>
    <!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
    <script src="https://unpkg.com/elm-pep"></script>
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="./resources/polyfill.min.js?features=fetch,requestAnimationFrame,Element.prototype.classList,URL,TextDecoder,Number.isInteger"></script>
    <style>
      .map {
        width: 100%;
        height:400px;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>
    <script src="main.js"></script>
  </body>
</html>

package.json

{
  "name": "attributions",
  "dependencies": {
    "ol": "7.1.0"
  },
  "devDependencies": {
    "parcel": "^2.0.0-beta.1"
  },
  "scripts": {
    "start": "parcel index.html",
    "build": "parcel build --public-url . index.html"
  }
}

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