ng-map cluster with infowindow - angularjs

Question

I'm trying to display infowindow on clusters. My problem is that the infowindow is display far than the cluster and not on it.
This is how I have added the click event to the cluster:
$scope.markerCluster = new MarkerClusterer(map, markers);
google.maps.event.addListener($scope.markerCluster, 'clusterclick', function(cluster) {
$scope.map.showInfoWindow('bar', $scope.markerCluster);
console.log("cluster click");
});

Answer 1

To position info window over marker cluster setPosition function needs to be explicitly invoked, for example:
google.maps.event.addListener($scope.markerCluster, 'clusterclick', function (cluster) {
var infoWindow = $scope.map.infoWindows["myInfoWindow"]; //get infoWindow instance
infoWindow.setPosition(cluster.getCenter()); //<-set position
$scope.map.showInfoWindow('myInfoWindow', cluster);
});
Example
angular.module('mapApp', ['ngMap'])
.controller('mapController', function ($scope, NgMap) {
NgMap.getMap().then(function (map) {
$scope.map = map;
$scope.initMarkerClusterer();
});
$scope.cities = [
{ id: 1, name: 'Oslo', pos: [59.923043, 10.752839] },
{ id: 2, name: 'Stockholm', pos: [59.339025, 18.065818] },
{ id: 3, name: 'Copenhagen', pos: [55.675507, 12.574227] },
{ id: 4, name: 'Berlin', pos: [52.521248, 13.399038] },
{ id: 5, name: 'Paris', pos: [48.856127, 2.346525] }
];
$scope.initMarkerClusterer = function () {
var markers = $scope.cities.map(function (city) {
return $scope.createMarker(city);
});
var mcOptions = { imagePath: 'https://cdn.rawgit.com/googlemaps/js-marker-clusterer/gh-pages/images/m' , zoomOnClick: false };
$scope.markerCluster = new MarkerClusterer($scope.map, markers, mcOptions);
google.maps.event.addListener($scope.markerCluster, 'clusterclick', function (cluster) {
//generate infoWindow content
var cities = cluster.getMarkers().map(function(m){
return m.title;
});
$scope.content = cities.join(",");
var infoWindow = $scope.map.infoWindows["myInfoWindow"]; //get infoWindow instance
infoWindow.setPosition(cluster.getCenter());
$scope.map.showInfoWindow('myInfoWindow', cluster);
});
};
$scope.createMarker = function (city) {
var marker = new google.maps.Marker({
position: new google.maps.LatLng(city.pos[0], city.pos[1]),
title: city.name
});
google.maps.event.addListener(marker, 'click', function () {
$scope.content = marker.title;
$scope.map.showInfoWindow('myInfoWindow', this);
});
return marker;
}
});
<script src="https://code.angularjs.org/1.4.8/angular.js"></script>
<script src="https://maps.googleapis.com/maps/api/js"></script>
<script src="https://rawgit.com/allenhwkim/angularjs-google-maps/master/build/scripts/ng-map.js"></script>
<script src="https://googlemaps.github.io/js-marker-clusterer/src/markerclusterer.js"></script>
<div ng-app="mapApp" ng-controller="mapController">
<ng-map default-style="true" zoom="3" center="59.339025, 18.065818">
<info-window id="myInfoWindow">
<div ng-non-bindable>
<h4>{{content}}</h4>
</div>
</info-window>
</ng-map>
</div>