LeafletBundle/Resources/public/js/leaflet-map-widget.js

var geocoder;

$(document).ready(function () {
    geocoder = new google.maps.Geocoder();

    map.addControl(new L.Control.Search({
        sourceData: googleGeocoding,
        formatData: formatJSON,
        markerLocation: true,
        autoType: false,
        autoCollapse: true,
        minLength: 2,
        position: 'topright'
    }));

    $('.search-button').on('click', function () {
        if (loc) {
            drawMarker();
            setDataValue();
        }
    });

    $('.search-input').on('keypress', function (e) {
        if (e.keyCode == 13 && loc) {
            e.preventDefault();
            e.stopPropagation();
            drawMarker();
            setDataValue();
        }
    });

    map.on('zoomend', function () {
        setDataValue();
    });

    map.on('click', function (e) {
        loc = new L.latLng(e.latlng);
        drawMarker();
        setDataValue();
    });
});
function setDataValue()
{
    var jsonParseData = {};
    var dataValue = $('[name$="[data]"]').val();
    if (dataValue) {
        jsonParseData = JSON.parse(dataValue);
    }
    jsonParseData.lat = marker._latlng.lat;
    jsonParseData.lng = marker._latlng.lng;
    jsonParseData.zoom = map.getZoom();

    var stringifyData = JSON.stringify(jsonParseData);

    $('[name$="[data]"]').val(stringifyData);
    $('[name$="[map]"]').val(stringifyData);
}

function googleGeocoding(text, callResponse)
{
    geocoder.geocode({address: text}, callResponse);
}

function formatJSON(rawjson)
{
    var json = {},
            key;
    for (var i in rawjson) {
        key = rawjson[i].formatted_address;
        loc = new L.latLng(rawjson[i].geometry.location.lat(), rawjson[i].geometry.location.lng());
        json[key] = loc;
    }

    return json;
}