donde/donde.js

   1 //      We use this global variable to store re-usable objects
   2 //      If this grows too big, it's time to re-think the approach
   3 var _g = {};
   4 _g['host_back'] = 'cubito.ath.cx:3000'
   5 _g.retries = {};        //      Used to keep count of retries by address
   6
   7 function searchAndPin() {
   8         //      Get map bounds
   9         var bounds = _g.map.getBounds();
  10         var sw = bounds.getSouthWest();
  11         var ne = bounds.getNorthEast();
  12         document.getElementById("latlng").innerHTML=_g.map.getCenter();
  13
  14         // Clear current Overlays
  15         _g.map.clearOverlays();
  16
  17         //      Query restaurants in that area and puts a pin for each found
  18         get_resto_list({a0:sw.lat(),o0:sw.lng(),a1:ne.lat(),o1:ne.lng()},function(data) {
  19                 var venues = data;
  20                 for(var i=0;i<venues.length;i++) {
  21                         var venue = venues[i];
  22                         put_pin(venue.lat, venue["long"], venue.name);
  23                 }
  24         });
  25 }
  26 function main(){
  27         if (!GBrowserIsCompatible()) {
  28                 alert("Browser not compatible");
  29         }
  30
  31         //      Create map and store as global
  32         _g.map = new GMap2(document.getElementById("map"));
  33         _g.map.addControl(new GLargeMapControl());
  34
  35         //      Create goecoder and store as global
  36         _g.geocoder = new GClientGeocoder();
  37         _g.geocoder.setBaseCountryCode("ar");
  38
  39         //      Position map arbitrarily in Nuñez
  40         /*  _g.geocoder.getLatLng("nuñez, capital federal, argentina",
  41             function( pt) {
  42                 _g.map.setCenter( pt, 15);
  43                 });
  44         */
  45         //      Position map arbitrarily in Nuñez without geocoding
  46         _g.map.setCenter(new GLatLng(-34.5585098, -58.4824486),15);
  47
  48         // Searches current map position and puts pins
  49         searchAndPin();
  50
  51         // Creates listener to check for map repositioning
  52         GEvent.addListener(_g.map,"moveend",function (){
  53                 searchAndPin();
  54         });
  55 }
  56
  57 /**
  58 * Puts a pin in the map, given lat, lng and a name (from venues)
  59 */
  60 function put_pin( lat, lng, name) {
  61        var marker = new GMarker(new GLatLng(lat, lng));
  62        _g.map.addOverlay( marker, {clickable: true});
  63        GEvent.addListener( marker, "click", function() {
  64                        marker.openInfoWindow(name);
  65        });
  66 }
  67
  68 function get_resto_list( parameters, callback) {
  69         new Ajax.ScriptRequest( "http://" + _g['host_back'] + "/venues/viewport", {
  70                 parameters: parameters,
  71                 onResponse: callback,
  72                 callbackName: "callback",
  73                 onFailure: function( e) {
  74                         alert("Error listing restaurants: "  + e);
  75                 }
  76         });
  77 }