<div ng-controller="MyCtrl">
  <div class="row">
    <div class="col-sm-12">
      <ui-gmap-google-map 
        id="map-canvas"
        center="map.center"
        zoom="map.zoom"
        draggable="true"
        options="map.options"
        control="map.control"
        events="map.events"
      >
      </ui-gmap-google-map>
      <div id="polygon-panel" class="well well-sm">{{machi}}</div>
      <button id="ctrlBtn" class="btn btn-primary btn-xs" 
            ng-class="{'btn-success': border}" 
            ng-click="toPolygon()">toTownBorder
      </button>
    </div>
  </div>
</div>

var mapApp = angular.module('googleMapApp', ['uiGmapgoogle-maps']);

mapApp.config(
    ['uiGmapGoogleMapApiProvider', function(GoogleMapApiProviders) {
        GoogleMapApiProviders.configure({
          key: 'your Google Map api key',
          v: '3', //defaults to latest 3.X anyhow
          libraries: 'weather,geometry,visualization,places'
        });
    }]
);

mapApp.controller("MyCtrl",['$scope', 'uiGmapGoogleMapApi', function ($scope,uiGmapGoogleMapApi) {
  var polygonPanel = document.getElementById('polygon-panel');
  var featureStyle = {
    strokeColor: '#FF0000',
    strokeOpacity: 0.9,
    strokeWeight: 0.3,
    fillColor: '#FFFF00',
    fillOpacity: 0.1,
  };

  angular.extend($scope, {
    map: {
      center: {
        latitude: 35.7012,
        longitude: 139.7140
      },
      options: {
        maxZoom: 20,
        minZoom: 3
      },
      zoom: 14,
      control: {},
      events: {
        projection_changed: function (map, eventName, originalEventArgs) {
          var ctrlBtn = document.getElementById('ctrlBtn');
          map.controls[google.maps.ControlPosition.TOP_RIGHT].push(ctrlBtn);
          map.data.loadGeoJson('../wp-content/themes/wp/json/shinjuku2.geojson');
          map.data.setStyle({visible: false});
        }
      }
    },
  });
  $scope.border = false;
  $scope.toPolygon = function () {
    if (!$scope.border) {
      $scope.map.control.getGMap().data.setStyle(featureStyle);
      $scope.map.control.getGMap().controls[google.maps.ControlPosition.BOTTOM_CENTER].push(polygonPanel);
      $scope.map.control.getGMap().data.addListener('mouseover', function(event) {
        $scope.machi = event.feature.getProperty('MOJI');
        $scope.$apply();
      });
    } else {
      $scope.map.control.getGMap().data.setStyle({visible: false});
      $scope.map.control.getGMap().controls[google.maps.ControlPosition.BOTTOM_CENTER].removeAt(0);
    }
    $scope.border = !$scope.border;
    return;
  };
  uiGmapGoogleMapApi.then(function(maps) {});
}]);