open-location-code/js/example2.html at master · unserwein/open-location-code · GitHub

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<!--
 Copyright 2014 Google Inc. All rights reserved.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->
<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <meta name="Description" content="">
  <title>Open Location Code Example</title>
  <link href='http://fonts.googleapis.com/css?family=Roboto' rel='stylesheet' type='text/css'>
  <script type="text/javascript"
    src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCP3yO0nubZ8vCiyK-ZF-XEJ7VQWe6wVIM&libraries=geometry">
  </script>
  <script type="text/javascript" src="openlocationcode.js"></script>
  <script type="text/javascript" src="examples.js"></script>
  <link href='examples.css' rel='stylesheet' type='text/css'>
</head>
<body>
  <div id="content">
    <div id="map-canvas" class="map_frame" ></div>
    <div id="messageBox">
      <div id="message_header">
      <h1>Discover or enter OLC codes</h1>
      <p>
        Clicking on the map will display the standard and refined accuracy
        OLC codes. Or you can enter a code in the text box below.
      </p>
      </div>
      <form onsubmit="processCode();" action="javascript:void(0)">
        <input id="code_input" class="text_input" placeholder="Enter OLC code">
      </form>
    </div>
  </div>

  <script type="text/javascript">

    /** The Google Maps map object. */
    var map;

    /*
      Handle clicks on the map. Computes the standard and refined Open Location Codes for
      the clicked location.
    */
    function mapClickHandler(event) {
      clearPolygons();

      var standardCode = OpenLocationCode.encode(event.latLng.lat(), event.latLng.lng());
      var refinedCode = OpenLocationCode.encode(event.latLng.lat(), event.latLng.lng(), 11);

      var messageHeader = document.getElementById('message_header');
      messageHeader.innerHTML = '<p>The standard OLC code is <em>' + standardCode +
          '</em> and is the lightly shaded area.</p><p>The refined, more accurate code ' +
          'is <em>' + refinedCode + '</em> and is the heavier shaded area.';

      zoomTo(standardCode);
      polygons.push(displayOlcArea(map, standardCode));
      polygons.push(displayOlcArea(map, refinedCode));
    }

    /**
      * Check the entered code is valid, and display an appropriate message.
      */
    function processCode() {
      clearPolygons();
      var code = document.getElementById('code_input').value;
      var messageHeader = document.getElementById('message_header');
      if (!OpenLocationCode.isValid(code)) {
        messageHeader.innerHTML = '<p>The specified code, <em>' + code + '</em>, ' +
            'is not a valid OLC code.</p>';
        return;
      }
      if (!OpenLocationCode.isFull(code)) {
        messageHeader.innerHTML = '<p>The specified code, <em>' + code + '</em>, ' +
            'is not a valid, full OLC code.</p>';
        return;
      }
      zoomTo(code);
      polygons.push(displayOlcArea(map, code));

      var codeArea = OpenLocationCode.decode(code);
      var height = google.maps.geometry.spherical.computeDistanceBetween(
          new google.maps.LatLng(codeArea.latitudeLo, codeArea.longitudeLo),
          new google.maps.LatLng(codeArea.latitudeHi, codeArea.longitudeLo));
      height = Math.round(height * 10) / 10;
      var width = google.maps.geometry.spherical.computeDistanceBetween(
          new google.maps.LatLng(codeArea.latitudeLo, codeArea.longitudeLo),
          new google.maps.LatLng(codeArea.latitudeLo, codeArea.longitudeHi));
      width = Math.round(width * 10) / 10;

      messageHeader.innerHTML = '<p>The specified code, <em>' +
          formatCode(code) + '</em>, ' + 'is ' + height + ' meters tall, and ' +
          width + ' meters wide.</p>';
    }
  </script>

  <script type="text/javascript">
    // What to do when the page loads.
    google.maps.event.addDomListener(window, 'load', function() {
      // Create the map object.
      map = new google.maps.Map(
          document.getElementById('map-canvas'),
          {center: new google.maps.LatLng(47.365561, 8.52494),
           zoom: 1,
           mapTypeId: google.maps.MapTypeId.ROADMAP,
           scaleControl: true});
      map.setTilt(0);
      // Add an event listener to display OLC boxes around clicks.
      google.maps.event.addListener(map, 'click', mapClickHandler);
    });
  </script>
</body>
</html>