OpenLayers学习笔记(五)— 拖拽Feature图层

2018/12/28 17:04
阅读数 1.9K

参考文档的例子可以知道如何拖动矢量图层feature

GitHub: 八至

作者:狐狸家的鱼

本文链接:拖拽Feature图层

全部代码

<!DOCTYPE html>
<html>
  <head>
    <title>Icon Symbolizer</title>
    <link rel="stylesheet" href="https://openlayers.org/en/v3.20.1/css/ol.css" type="text/css">
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <script src="https://openlayers.org/en/v3.20.1/build/ol.js"></script>
    <script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
    <style>
      #map {
        position: relative;
      }
      #popup {
        cursor: pointer;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>
   <script>
      var coord1 = [-5707673.76, -3499420.81];
      var coord2 = [-6707673.76, -3499420.81];

      var lineStyle = new ol.style.Style({
          stroke: new ol.style.Stroke({ 
              color: '#ffcc33', 
              width: 3,
              lineDash:[10,10]
            })
        });
        var styleMarker = new ol.style.Style({
          image: new ol.style.Icon({
            scale: .7, anchor: [0.5, 1],
            src: 'marker.png'
          })
        });

        var marker1 = new ol.geom.Point(coord1);
        var featureMarker1 = new ol.Feature(marker1);
        var marker2 = new ol.geom.Point(coord2);
        var featureMarker2 = new ol.Feature(marker2);

        var line = new ol.geom.LineString([coord1, coord2]);
        var lineFeature = new ol.Feature(line);

        var vector = new ol.layer.Vector({
          source: new ol.source.Vector({
            features: [lineFeature, featureMarker1, featureMarker2]
          }),
          style: [lineStyle, styleMarker]
        });

        var map = new ol.Map({
          target: 'map',
          layers: [new ol.layer.Tile({ source: new ol.source.OSM() }), vector],
          view: new ol.View({ center: coord1, zoom: 5 })
        });

        var translate1 = new ol.interaction.Translate({
          features: new ol.Collection([featureMarker1])
        });
        var translate2 = new ol.interaction.Translate({
          features: new ol.Collection([featureMarker2])
        });
        map.addInteraction(translate1);
        map.addInteraction(translate2);

        var coordMarker1, coordMarker2;
        translate1.on('translatestart', function (evt) {
          coordMarker2 = marker2.getCoordinates();
        });
        translate1.on('translating', function (evt) {
          line.setCoordinates([coordMarker2, evt.coordinate]);
        });
        translate2.on('translatestart', function (evt) {
          coordMarker1 = marker1.getCoordinates();
        });
        translate2.on('translating', function (evt) {
          line.setCoordinates([coordMarker1, evt.coordinate]);
        });

        map.on('pointermove', function(e) {
          if (e.dragging) return;
          var hit = map.hasFeatureAtPixel(map.getEventPixel(e.originalEvent));
          map.getTargetElement().style.cursor = hit ? 'pointer' : '';
        });

   </script>

  </body>
</html>

JSFiddle

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