Question

我使用了openlayers.org中共享视图示例的调整版本：https://openlayers.org/en/latest/examples/side-by-side.html

var layer = new TileLayer({
  source: new OSM()
  });

window['view1'] = new ol.View({
    center: [0, 0],
    zoom: 1
});

window['view2'] = new ol.View({
  center: [0, 0],
    zoom: 1
});

window['map1'] = new ol.Map ({
    target: 'map1',
    layers: [layer],
    view: window['view1']
});

window['map2'] = new ol.Map({
    target: 'map2',
    layers: [layer],
    view: window['view2']
});

window['map1'].addEventListener('change:resolution', function 
(evt) {
    window['view1'] = window['view2'];
    window['map1'].setView(window['view1']);
}, false);

window['map2'].addEventListener('change:resolution', function 
(evt) {
    window['view2'] = window['view1'];
    window['map2'].setView(window['view2']);
}, false);

此后，我如何正确解开这些“新的”平等观点？（可能答案很简单，但现在让我头疼）

PS：我使用全局变量（例如window ['map2']），因为我需要能够绑定和取消绑定多个地图。

Answer 1

我认为您不需要听更改，如果地图共享一个视图，它们会自动同步。

将一个地图的视图设置为另一个地图的视图将开始同步。给其中一个地图一个新视图（最初基于它所共享的视图的状态）将中断同步。

<!doctype html>
<html lang="en">

<head>
  <link rel="stylesheet" href="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.3.0/css/ol.css" type="text/css">
  <style>
    html, body, .map {
        margin: 0;
        padding: 0;
        width: 100%;
        height: 100%;
    }
    .map1 {
        width: 50%;
        height: 40%;
    }
    .map2 {
        width: 50%;
        height: 40%;
    }
  </style>
  <script src="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.3.0/build/ol.js"></script>
  <title>OpenLayers example</title>
</head>

<body>
  <div id="map1" class="map1"></div>
  <input type="submit" onclick="sync1()" value="Sync with 1">
  <input type="submit" onclick="unsync()" value="Unsync">
  <input type="submit" onclick="sync2()" value="Sync with 2">
  <div id="map2" class="map2"></div>
  <script type="text/javascript">

      var layer = new ol.layer.Tile({
        source: new ol.source.OSM()
      });

      var map1 = new ol.Map({
        target: 'map1',
        layers: [layer],
        view: new ol.View({
          center: [0, 0],
          zoom: 1
        })
      });

      var map2 = new ol.Map({
        target: 'map2',
        layers: [layer],
        view: new ol.View({
          center: [0, 0],
          zoom: 1
        })
      });

      function sync1() {
          map2.setView(map1.getView());
      }
      function sync2() {
          map1.setView(map2.getView());
      }
      function unsync() {
          map2.setView(new ol.View({
            projection: map2.getView().getProjection(),
            center: map2.getView().getCenter(),
            resolution: map2.getView().getResolution(),
            rotation: map2.getView().getRotation(),
            maxZoom: map2.getView().getMaxZoom(),
            minZoom: map2.getView().getMinZoom()
          }));
      }

  </script>
</body>

</html>

Openlayers：并排共享视图........如何正确解除绑定？

1 个答案: