Código Apex y Visualforce de FindNearby

Éste es el código que usaremos para el ejemplo de mostrar las cuentas cercanas a nosotros y que estén a menos de 1 Km de distancia.

Clase Apex FindNearby:

[code language=”javascript”] global with sharing class FindNearby {
public FindNearby(ApexPages.StandardController controller) {}

// Find Accounts nearest a geolocation
global static List<Account> getNearby(String lat, String lon) {
// If geolocation is not set, use Plaza Santa Bárbara, 2, Madrid
if(lat == null || lon == null || lat.equals("") || lon.equals("")) {
lat = "40.427305";
lon = "-3.696754";

// SOQL query to get the nearest warehouses
String queryString =
"SELECT Id, Name, Location__Longitude__s, Location__Latitude__s " +
"FROM Account " +
"WHERE DISTANCE(Location__c, GEOLOCATION("+lat+","+lon+"), \"km\") < 1 " +
"ORDER BY DISTANCE(Location__c, GEOLOCATION("+lat+","+lon+"), \"km\") " +
"LIMIT 10";

// Run and return the query results

Página Visualforce FindNearbyAccountPage:

[code language=”javascript”] <apex:page sidebar="false" showheader="false" standardController="Account" extensions="FindNearby">
<!– Include in Google Maps API via JavaScript static resource –>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js"></script>

<!– Setup the map to take up the whole window –>
html, body { height: 100%; }
.page-map, .ui-content, #map-canvas { width: 100%; height:100%; padding: 0; }
#map-canvas { height: min-height: 100%; }

function initialize() {
var lat, lon;

// If we can, get the position of the user via device geolocation
if (navigator.geolocation) {
lat = position.coords.latitude;
lon = position.coords.longitude;

// Use Visualforce JavaScript Remoting to query for nearby accounts
Visualforce.remoting.Manager.invokeAction("{!$RemoteAction.FindNearby.getNearby}", lat, lon,
function(result, event){
if (event.status) {
createMap(lat, lon, result);
} else if (event.type === "exception") {
//exception case code
} else {
{escape: true}
} else {
// Set default values for map if the device does not have geolocation capabilities
/** Plaza Santa Bárbara, 2, Madrid **/
lat = 40.427305;
lon = -3.696754;

var result = [];
createMap(lat, lon, result);

function createMap(lat, lon, accounts){
// Get the map div, and center the map at the proper geolocation
var currentPosition = new google.maps.LatLng(lat,lon);
var mapDiv = document.getElementById("map-canvas");
var map = new google.maps.Map(mapDiv, {
center: currentPosition,
zoom: 14,
mapTypeId: google.maps.MapTypeId.ROADMAP

// Set a marker for the current location
var positionMarker = new google.maps.Marker({
map: map,
position: currentPosition,
icon: "https://maps.google.com/mapfiles/ms/micons/green.png"

// Keep track of the map boundary that holds all markers
var mapBoundary = new google.maps.LatLngBounds();

// Set markers on the map from the @RemoteAction results
var acc;
for(var i=0; i<accounts.length;i++){
acc = accounts[i];
setupMarker(acc, map, mapBoundary);

// Resize map to neatly fit all of the markers

function setupMarker(acc, map, mapBoundary){
var accountNavUrl;

// Determine if we are in Salesforce1 and set navigation link appropriately
accountNavUrl =
"javascript:sforce.one.navigateToSObject(\"" + acc.Id + "\")";
} catch(err) {
accountNavUrl = "\\" + acc.Id;

var accountDetails =
"<a href=\"" + accountNavUrl + "\">" + acc.Name + "</a>";

// Create the callout that will pop up on the marker
var infowindow = new google.maps.InfoWindow({
content: accountDetails

// Place the marker on the map
var marker = new google.maps.Marker({
map: map,
position: new google.maps.LatLng(

// Add the action to open up the panel when it is marker is clicked
google.maps.event.addListener(marker, "click", function(){
infowindow.open(map, marker);

// Fire the initialize function when the window loads
google.maps.event.addDomListener(window, "load", initialize);

<!– All content is rendered by the Google Maps code –>
<!– This minimal HTML justs provide a target for GMaps to write to –>
<body style="font-family: Arial; border: 0 none;">
<div id="map-canvas"></div>

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