itsm-pc-handle/bower_components/ngmap/app/scripts/directives/heatmap-layer.js

/**
 * @ngdoc directive
 * @name heatmap-layer
 * @requires Attr2Options 
 * @description 
 *   Requires:  map directive
 *   Restrict To:  Element
 *
 * @example
 * Example: 
 *
 *   <map zoom="11" center="[41.875696,-87.624207]">
 *     <heatmap-layer data="taxiData"></heatmap-layer>
 *   </map>
 */
/*jshint -W089*/
ngMap.directive('heatmapLayer', ['Attr2Options', '$window', function(Attr2Options, $window) {
  var parser = Attr2Options;
  
  return {
    restrict: 'E',
    require: '^map',

    link: function(scope, element, attrs, mapController) {
      var filtered = parser.filter(attrs);

      /**
       * set options 
       */
      var options = parser.getOptions(filtered);
      options.data = $window[attrs.data] || scope[attrs.data];
      if (options.data instanceof Array) {
        options.data = new google.maps.MVCArray(options.data);
      } else {
        throw "invalid heatmap data";
      }
      var layer = new google.maps.visualization.HeatmapLayer(options);

      /**
       * set events 
       */
      var events = parser.getEvents(scope, filtered);
      console.log('heatmap-layer options', layer, 'events', events);

      mapController.addObject('heatmapLayers', layer);
    }
   }; // return
}]);