Showing a Google Map in a modal created with Twitt

Question

I'm trying to insert a Google map into a modal using Twitter Bootstrap. The modal shows up with the shape of the map present, but only part of the map is displayed, the rest is gray. Upon resizing the screen the map always shows up correctly, although centered in the wrong place.

I've searched and found suggestions such as calling the map's resize event, or setting the max-width of the map image to none, but none of these suggestions have helped so far. It seems like the map is failing to figure out it's correct size as long as it's in an element that's hidden.

JS

function initialize() {
  var mapOptions = {
    center: new google.maps.LatLng(51.219987, 4.396237),
    zoom: 12,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };
  var map = new google.maps.Map(document.getElementById("mapCanvas"),
    mapOptions);
  var marker = new google.maps.Marker({
    position: new google.maps.LatLng(51.219987, 4.396237)
  });
  marker.setMap(map);
}

HTML

<div class="modal hide fade" id="myModal">
  <div class="modal-header">
    <button type="button" class="close" data-dismiss="modal">×</button>
    <h3></h3>
  </div>
  <div class="modal-body">
    <div id="mapCanvas" style="width: 500px; height: 400px"></div>
  </div>
  <div class="modal-footer">
    <a href="#" class="btn" data-dismiss="modal">Close</a>
  </div>
</div>

I'm using Twitter Bootstrap v2.0.4. I need some help because I'm failing to trigger the resize event correctly or editing the css so that the Google map is left alone.

Answer 1

try this !

<div class="modal fade" id="map_modal" tabindex="-1" role="dialog" aria-    labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog">
    <div class="modal-content">
        <div class="modal-header">
            <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
            <h4 class="modal-title" id="myModalLabel">Modal title</h4>
        </div>
        <div class="modal-body"><div id="map_canvas" style="width:530px; height:300px"></div></div>

    </div><!-- /.modal-content -->
</div><!-- /.modal-dialog -->

var map = marker = new Array();
geocoder = NULL;


                    function addPoint(location, id, mapId) {
                        if (!marker[id]) {
                            marker[id] = new google.maps.Marker({
                                position: location,
                                map: map[mapId],
                                draggable: true
                            });
                        }

                    }


                    function placeMarker(location, editStr, id) {
                        if (!marker[id]) {
                            marker[id] = new google.maps.Marker({
                                position: location,
                                map: map[id],
                                draggable: false
                            });
                        }
                        marker[id].setPosition(location);
                        map[id].setCenter(location);
                        $("#longitud").val(location.lat());
                        $("#latitud").val(location.lng());


                    }


                    function  initializeMap(id, div_id, lat, lng, editStr) {
                        if (!geocoder)
                            geocoder = new google.maps.Geocoder();

                        if (!map[id]) {
                            var coordinates = new google.maps.LatLng(lat, lng);
                            var myOptions = {zoom: 8, center: coordinates, mapTypeId: google.maps.MapTypeId.ROADMAP}
                            map[id] = new google.maps.Map(document.getElementById(div_id), myOptions);
                            google.maps.event.addListener(map[id], 'click', function(event) {
                                placeMarker(event.latLng, editStr, id);
                            });

                            placeMarker(coordinates, editStr, id);

                        }
                    }


                    $('#map_modal').on('shown.bs.modal', function(e) {
                        initializeMap("#newMaps", "map_canvas", 10.444598, -66.9287, "");
                    })

Answer 2

I am also facing the same issue but i resolve it by waiting for the map's 'idle' state (i.e. when it's finished) and then calling the resize:

 google.maps.event.addListenerOnce(map, 'idle', function () {
                 var currentCenter = map.getCenter();
                 google.maps.event.trigger(map, 'resize');
                 map.setCenter(currentCenter);

                 map.setZoom(15);
             });

after

              map = new google.maps.Map(document.getElementById('map-canvas2'),mapOptions);

Answer 3

    this works for me 
    **<!-- Modal -->**
    <div class="modal fade" id="myModal" role="dialog">
        <div class="modal-dialog">

            <!-- Modal content-->
            <div class="modal-content">
                <div class="modal-header">
                    <button type="button" class="close" data-dismiss="modal">&times;</button>
                    <h4 class="modal-title">Google Maps</h4>
                </div>
                <div class="modal-body">

                    <div id="map_canvas" style="width:auto; height: 500px;"></div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                </div>
            </div>
        </div>
    </div>


**Button**
 <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">View Map</button>

**javascript**
<script type="text/javascript">
    function initializeMap() {
        var mapOptions = {
            center: new google.maps.LatLng(51.219987, 4.396237),
            zoom: 12,
            mapTypeId: google.maps.MapTypeId.HYBRID
        };
        var map = new google.maps.Map(document.getElementById("map_canvas"),
          mapOptions);
        var marker = new google.maps.Marker({
            position: new google.maps.LatLng(51.219987, 4.396237)
        });
        marker.setMap(map);
    }

    //show map on modal
    $('#myModal').on('shown.bs.modal', function () {
        initializeMap();
    });

</script>

hope this will help

Answer 4

For me, it works like this (Boostrap 3):

$("#contact-modal").on("shown.bs.modal", function () {
    google.maps.event.trigger(map, "resize");
});

Answer 5

Showing the map correctly and centered

I wanted to point out a few modifications I made, based on the original answer, to make it work with Bootstrap 3 (check about modals usage).

// Resize map to show on a Bootstrap's modal
$('#map-modal').on('shown.bs.modal', function() {
  var currentCenter = map.getCenter();  // Get current center before resizing
  google.maps.event.trigger(map, "resize");
  map.setCenter(currentCenter); // Re-set previous center
});

In this case, I also take care of recentering the map, based on this question suggested in Jan-Henk's comment to the first answer.