// *
// * Coordinates search
// * 2013 - en.marnoto.com
// *

// Required variables.
var map;
var marker;

function initialize() {
   var mapOptions = {
   center: new google.maps.LatLng(48.459618,18.892579),    
      zoom: 8,
      mapTypeId: 'roadmap'
   };





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

   // This event detects a click on the map.
   google.maps.event.addListener(map, "click", function(event) {

      // Get lat lng coordinates.
      // This method returns the position of the click on the map.
      var lat = event.latLng.lat().toFixed(6);
      var lng = event.latLng.lng().toFixed(6);

      // Call createMarker() function to create a marker on the map.
      createMarker(lat, lng);

      // getCoords() function inserts lat and lng values into text boxes.
      getCoords(lat, lng);

   });
   
   
   
   
   
   
   
   

var geocoder = new google.maps.Geocoder();
document.getElementById('submit').addEventListener('click', function() {
          geocodeAddress(geocoder, map);
        });

}
google.maps.event.addDomListener(window, 'load', initialize);

// Function that creates the marker.
function createMarker(lat, lng) {

   // The purpose is to create a single marker, so
   // check if there is already a marker on the map.
   // With a new click on the map the previous
   // marker is removed and a new one is created.

   // If the marker variable contains a value
   if (marker) {
      // remove that marker from the map
      marker.setMap(null);
      // empty marker variable
      marker = "";
   }

   // Set marker variable with new location
   marker = new google.maps.Marker({
      position: new google.maps.LatLng(lat, lng),
      draggable: true, // Set draggable option as true
      map: map
   });


   // This event detects the drag movement of the marker.
   // The event is fired when left button is released.
   google.maps.event.addListener(marker, 'dragend', function() {
      
      // Updates lat and lng position of the marker.
      marker.position = marker.getPosition();

      // Get lat and lng coordinates.
      var lat = marker.position.lat().toFixed(6);
      var lng = marker.position.lng().toFixed(6);

      // Update lat and lng values into text boxes.
      getCoords(lat, lng);

   });
}

// This function updates text boxes values.
function getCoords(lat, lng) {

   // Reference input html element with id="lat".
   var coords_lat = document.getElementById('lat');

   // Update latitude text box.
   coords_lat.value = lat;

   // Reference input html element with id="lng".
   var coords_lng = document.getElementById('lng');

   // Update longitude text box.
   coords_lng.value = lng;
}




function geocodeAddress(geocoder, resultsMap) {
        var address = document.getElementById('address').value;
        geocoder.geocode({'address': address}, function(results, status) {
          if (status === 'OK') {
            resultsMap.setCenter(results[0].geometry.location);
            map.setZoom(12);
          } else {
            alert('Lokalita nebola najdena: ' + status);
          }
        });
      }