原文链接及内容
这个例子展示了页面滚动的一个常见行为:在触摸设备上，当一个手指放在地图上时，它可以用来滚动页面。只有两个手指可以拖动。对于鼠标或触控板设备，按住Cmd或Ctrl键将启用在地图上拖动，否则页面将滚动。
main.js代码如下：
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| 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 {DragPan, MouseWheelZoom, defaults} from 'ol/interaction.js';
import {platformModifierKeyOnly} from 'ol/events/condition.js';
const map = new Map({
interactions: defaults({dragPan: false, mouseWheelZoom: false}).extend([
new DragPan({
condition: function (event) {
return this.getPointerCount() === 2 || platformModifierKeyOnly(event);
},
}),
new MouseWheelZoom({
condition: platformModifierKeyOnly,
}),
]),
layers: [
new TileLayer({
source: new OSM(),
}),
],
target: 'map',
view: new View({
center: [0, 0],
zoom: 2,
}),
});
|
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>Panning and page scrolling</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>
|
)
