tw_eduprotestmap/index.html at master · initiummedia/tw_eduprotestmap · GitHub

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<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Taiwan Education Protest Map</title>
  <link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.3/leaflet.css" />
  <script src="http://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.3/leaflet.js"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
  <script src="twCounty2010.geo.js" charset="utf-8"></script>
  <script src="fedData.js" charset="utf-8"></script>
  <style>
    #map { height: 900px; }
  </style>
</head>
<body>
<div id="map"></div>
<script>
  var map = L.map('map').setView([23.03, 121.63], 8);
  var shapes = [];

  function _getStyle(feature) {
    return {
      "color": "black",
      "weight": 1
    }
  }

  function _onEachFeature(feature, layer){
    var i, j;
    layer.on('mouseover', function (event) {
      var countyName = feature.properties.COUNTYNAME;

      // Obtain a list of counties of the same group
      var listOfCountyOfSameGroup = [];
      for (i=0; i<fedData.length; i++) {
        if (fedData[i].areas.indexOf(countyName) !== -1) {
          listOfCountyOfSameGroup = fedData[i].areas;
        }
      }

      // Highlight counties of the same protest group; de-highlight those that are not;
      for (i=0; i<shapes.length; i+=1) {
        var polygon = shapes[i];
        if (listOfCountyOfSameGroup.indexOf(polygon.countyName) !== -1) {
          polygon.setStyle({fillColor: '#999'});
        } else {
          polygon.setStyle({fillColor: 'black'})
        }
      }

    });
  }

  for (var i=0;i<mapData.features.length;i++) {
    var feature = mapData.features[i];
    var shape = L.geoJson(feature, {
      style: _getStyle(feature),
      onEachFeature: _onEachFeature
    });
    shape.addTo(map);
    shape.countyName = feature.properties.COUNTYNAME;
    shapes.push(shape);
  }
</script>
</body>
</html>