Source: directives/overlay-map-type.js

/**
 * @ngdoc directive
 * @name overlay-map-type
 * @requires Attr2Options 
 * @description 
 *   Requires:  map directive
 *   Restrict To:  Element
 *
 * @example
 * Example: 
 *
 *   <map zoom="13" center="34.04924594193164, -118.24104309082031">
 *     <overlay-map-type index="0" object="coordinateMapType"></map-type>
 *   </map>
 */
(function() {
  'use strict';

  angular.module('ngMap').directive('overlayMapType', ['Attr2Options', '$window', function(Attr2Options, $window) {
    var parser = Attr2Options;
    
    return {
      restrict: 'E',
      require: '^map',

      link: function(scope, element, attrs, mapController) {
        var overlayMapTypeObject;
        var initMethod = attrs.initMethod || "insertAt";
        if (attrs.object) {
          var __scope = scope[attrs.object] ? scope : $window;
          overlayMapTypeObject = __scope[attrs.object];
          if (typeof overlayMapTypeObject == "function") {
            overlayMapTypeObject = new overlayMapTypeObject();
          }
        }
        if (!overlayMapTypeObject) {
          throw "invalid map-type object";
        }

        scope.$on('mapInitialized', function(evt, map) {
          if (initMethod == "insertAt") {
            var index = parseInt(attrs.index, 10);
            map.overlayMapTypes.insertAt(index, overlayMapTypeObject);
          } else if (initMethod == "push") {
            map.overlayMapTypes.push(overlayMapTypeObject);
          }
        });
        mapController.addObject('overlayMapTypes', overlayMapTypeObject);
      }
     }; // return
  }]);
})();