本文基于腾讯课堂老胡的课《跟我学Openlayers--基础实例详解》做的学习笔记，使用的openlayers 5.3.x api。
源码 见 1018.html ，对应的 官网示例 https://openlayers.org/en/latest/examples/overviewmap.html?q=OverviewMap
image.png
<!DOCTYPE html>
<html>
<head>
<title>自定义概览(鹰眼)控件
</title>
<link rel="stylesheet" href="../include/ol.css" type="text/css">
<script src="../include/ol.js"></script>
</head>
<style>
.ol-custom-overviewmap,
.ol-custom-overviewmap.ol-uncollapsible {
bottom: auto;
left: auto;
right: 0;
top: 0;
}
.ol-custom-overviewmap:not(.ol-collapsed) {
border: 1px solid black;
}
.ol-custom-overviewmap .ol-overviewmap-map {
border: none;
width: 300px;
}
.ol-custom-overviewmap .ol-overviewmap-box {
border: 2px solid red;
}
.ol-custom-overviewmap:not(.ol-collapsed) button {
bottom: auto;
left: auto;
right: 1px;
top: 1px;
}
.ol-rotate {
top: 170px;
right: 0;
}
</style>
<body>
<div id="map" class="map"></div>
<script>
//使用OverviewMap自定义鹰眼控件，自定义样式，
var overviewMapControl = new ol.control.OverviewMap({
className: 'ol-overviewmap ol-custom-overviewmap',
layers: [
new ol.layer.Tile({
source: new ol.source.OSM({
'url': 'https://{a-c}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png' +
'?apikey=0e6fc415256d4fbb9b5166a718591d71'
})
})
],
collapseLabel: '\u00BB',//收缩时的标签样式
label: '\u00AB', //展开时的样式
collapsed: false
});
var map = new ol.Map({
controls: ol.control.defaults().extend([
overviewMapControl
]),
//当地图拖动时，鹰眼地图也拖动到对应区域
// interactions: ol.interaction.defaults().extend([ //交互控制，有没有在这里没有区别
// new ol.interaction.DragRotateAndZoom()
// ]),
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
})
],
target: 'map',
view: new ol.View({
center: [500000, 6000000],
zoom: 7
})
});
</script>
</body>
</html>
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