自定义鹰眼

Rotate with view

本示例演示使用高级自定义实现鹰眼控件.

本示例演示使用其他支持的参数以及自定义 CSS 来实现定制化的鹰眼。还可以按住 shift 键+鼠标控制（拖动缩放）来查看鹰眼的显示状态。

main.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 {
  DragRotateAndZoom,
  defaults as defaultInteractions,
} from 'ol/interaction.js';
import {OverviewMap, defaults as defaultControls} from 'ol/control.js';

const rotateWithView = document.getElementById('rotateWithView');

const overviewMapControl = new OverviewMap({
  // see in overviewmap-custom.html to see the custom CSS used
  className: 'ol-overviewmap ol-custom-overviewmap',
  layers: [
    new TileLayer({
      source: new OSM({
        'url':
          'https://{a-c}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png' +
          '?apikey=Your API key from https://www.thunderforest.com/docs/apikeys/ here',
      }),
    }),
  ],
  collapseLabel: '\u00BB',
  label: '\u00AB',
  collapsed: false,
});

rotateWithView.addEventListener('change', function () {
  overviewMapControl.setRotateWithView(this.checked);
});

const map = new Map({
  controls: defaultControls().extend([overviewMapControl]),
  interactions: defaultInteractions().extend([new DragRotateAndZoom()]),
  layers: [
    new TileLayer({
      source: new OSM(),
    }),
  ],
  target: 'map',
  view: new View({
    center: [500000, 6000000],
    zoom: 7,
  }),
});

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Custom Overview Map</title>
    <link rel="stylesheet" href="node_modules/ol/ol.css">
    <style>
      .map {
        width: 100%;
        height: 400px;
      }

      .map .ol-custom-overviewmap,
      .map .ol-custom-overviewmap.ol-uncollapsible {
        bottom: auto;
        left: auto;
        right: 0;
        top: 0;
      }

      .map .ol-custom-overviewmap:not(.ol-collapsed)  {
        border: 1px solid black;
      }

      .map .ol-custom-overviewmap .ol-overviewmap-map {
        border: none;
        width: 300px;
      }

      .map .ol-custom-overviewmap .ol-overviewmap-box {
        border: 2px solid red;
      }

      .map .ol-custom-overviewmap:not(.ol-collapsed) button{
        bottom: auto;
        left: auto;
        right: 1px;
        top: 1px;
      }

      .map .ol-rotate {
        top: 170px;
        right: 0;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>
    <div><label><input type="checkbox" id="rotateWithView"> Rotate with view</label></div>
    <!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
    <script src="./resources/elm-pep.js"></script>
    <script type="module" src="main.js"></script>
  </body>
</html>

package.json

{
  "name": "overviewmap-custom",
  "dependencies": {
    "ol": "7.3.0"
  },
  "devDependencies": {
    "vite": "^3.2.3"
  },
  "scripts": {
    "start": "vite",
    "build": "vite build"
  }
}