Always return a site singleton and fix Edit Site Settings
Patch by: Sverre Rabbelier
role_profile_gmap = new function(){
// Create global variables
var map;
var marker;
var geocoder;
// The following strings can be customized to reflect ids in the page.
// You can also add or remove fields used for GMap Geocoding in
// the JSON address object
var current_lat = 0;
var current_lng = 0;
// Two different levels for zoom: Starting one and an inner that
// is used when showing the map if lat and lon page fields are set
var world_zoom = 0;
var country_zoom = 4;
var state_zoom = 6;
var city_zoom = 10;
var address_zoom = 13;
// Do not add a starting # as this JQuery selector seems
// incompatible with GMap API
var map_div = "role_profile_map";
var field_lat = "#id_latitude";
var field_lng = "#id_longitude";
// Need to save old values to avoid unwanted updating
// of lat and lot if marker dragged and blur another time an address field
var address = {
street: {
id: "#id_res_street",
old_value: ""
},
city: {
id: "#id_res_city",
old_value: ""
},
state: {
id: "#id_res_state",
old_value: ""
},
country: {
id: "#id_res_country",
old_value: ""
},
postalcode: {
id: "#id_res_postalcode",
old_value: ""
}
}
// Save current address fields in the JSON Object
function saveOldAddress() {
for (var a in address) {
address[a].old_value = $(address[a].id).val();
}
}
// Return true if the user has edited address fields
function isNewAddress() {
for (var a in address) {
if ($(address[a].id).val() != address[a].old_value) return true;
}
return false;
}
// Write saved lat and lng values to page fields
function setLatLngFields() {
$(field_lat).val(current_lat);
$(field_lng).val(current_lng);
}
// Read lat and lng fields and store them
function readLatLngFields() {
current_lat = $(field_lat).val();
current_lng = $(field_lng).val();
}
// This function reads address fields, merge them and uses
// GMap API geocoding to find the first hit
// Using geocoding http://code.google.com/intl/it-IT/apis/maps/documentation/services.html#Geocoding
function calculateAddress() {
// If the user has really edited address fields...
if (isNewAddress()) {
// Merge address fields
var address_string = "";
for (var a in address) {
address_string+=$(address[a].id).val();
if (a!=address.length-1) {address_string+=","};
}
// Ask GMap API for geocoding
geocoder.getLatLng(
address_string,
function(point) {
// If a point is found
if (point) {
// Save the current address in the JSON object
saveOldAddress();
// Set the new zoom, map center and marker coords
var zoom_set = world_zoom;
if ($(address.street.id).val()!="") zoom_set = address_zoom;
else if ($(address.city.id).val()!="") zoom_set = city_zoom;
else if ($(address.state.id).val()!="") zoom_set = state_zoom;
else if ($(address.country.id).val()!="") zoom_set = country_zoom;
map.setCenter(point, zoom_set);
marker.setPoint(point);
map.clearOverlays();
map.addOverlay(marker);
// Save point coords in local variables and then update
// the page lat/lng fields
current_lat = point.lat();
current_lng = point.lng();
setLatLngFields();
}
}
);
}
}
// Public function to load the map
this.map_load = function() {
// All can happen only if there is gmap compatible browser.
// TODO: Fallback in case the browser is not compatible
if (GBrowserIsCompatible()) {
// Save the address fields. This is useful if the page is being edited
// to not update blindly the lat/lng fields with GMap geocoding if
// blurring an address field
saveOldAddress();
var starting_point;
var zoom_selected = world_zoom;
var show_marker = false;
// Create the map and add small controls
map = new GMap2(document.getElementById(map_div));
map.addControl(new GSmallMapControl());
map.addControl(new GMapTypeControl());
// Instantiate a global geocoder for future use
geocoder = new GClientGeocoder();
// If lat and lng fields are not void (the page is being edited) then
// update the starting coords, modify the zoom level and tells following
// code to show the marker
if ($(field_lat).val()!="" && $(field_lng).val()!="") {
readLatLngFields();
zoom_selected = address_zoom;
show_marker = true;
}
// Set map center, marker coords and show it if this is an editing
starting_point = new GLatLng(current_lat,current_lng);
map.setCenter(starting_point, zoom_selected);
marker = new GMarker(starting_point, {draggable:true});
if (show_marker) map.addOverlay(marker);
// Adds a new event listener to geocode the address when an address
// field is blurred
for (var a in address) {
$(address[a].id).blur(calculateAddress);
}
// Adds a new event listener: if the marker has been dragged around...
GEvent.addListener(marker, "dragend", function() {
// Update internal variables with current marker coords...
current_lat = marker.getPoint().lat();
current_lng = marker.getPoint().lng();
// ...and set page fields accordingly
setLatLngFields();
});
}
}
};