Panning the Map

Programmatically pan the map so that it is continually in motion

HTML

<link rel="stylesheet" href="https://js.api.here.com/v3/3.0/mapsjs-ui.css">
<!-- SCRIPTS -->
<script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-core.js"></script>
<script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-service.js"></script>
<script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-ui.js"></script>
<script type="text/javascript" src="https://js.api.here.com/v3/3.0/mapsjs-mapevents.js"></script>

<!-- BODY -->
<h1>Panning the Map</h1>
<p>This example displays a map of the <b>Indian Ocean </b>which continuously pans using screen space X/Y coordinates.</p>
<hr/>
<div id="map" style="width: 600px; height: 400px; background: grey"></div>

CSS

code, h1, h2, h3{
  color: #124191;
  letter-spacing: -0.03em;
}
body {
  font-family:"Lucida Grande",Tahoma,sans-serif;
  color: rgb(102, 102, 102);
  font-size: 80%;
}
b, strong {
  color: black;
}
code {
  font-weight: 700;
  font-size: 120%;
}

JavaScript

/**
 * Pan the map so that it is continually in motion
 *
 * @param  {H.Map} map      A HERE Map instance within the application
 */
function panTheMap(map) {
  var viewPort,
      incX = 1,
      incY = 2,
      x = 100,
      y = 100;

  // Obtain the view port object of the map to manipulate its screen coordinates
  var viewPort = map.getViewPort(),
      // function calculates new screen coordinates and calls
      // viewport's interaction method with them
      pan = function() {
        x = x + incX;
        if (Math.abs(x) > 100) {
          incX = -incX;
        }

        y = y + incY;
        if (Math.abs(y) > 100) {
          incY = -incY;
        }

        viewPort.interaction(x, y);
      };

  // set interaction modifier that provides information which map properties
  // change with each "interact" call
  viewPort.startInteraction(H.map.render.RenderEngine.InteractionModifiers.COORD);
  // set up simple animation loop
  setInterval(pan, 15);
}

/**
 * Boilerplate map initialization code starts below:
 */

//Step 1: initialize communication with the platform
var platform = new H.service.Platform({
  app_id: 'DemoAppId01082013GAL',
  app_code: 'AJKnXv84fjrb0KIHawS0Tg',
  useCIT: true,
  useHTTPS: true
});
var defaultLayers = platform.createDefaultLayers();

//Step 2: initialize a map - this map is centered over New Delhi
var map = new H.Map(document.getElementById('map'),
  defaultLayers.normal.map,{
  center: {lat: 19.11, lng: 72.89},
  zoom: 4
});

panTheMap(map);

$('head').append('<link rel="stylesheet" href="https://js.api.here.com/v3/3.0/mapsjs-ui.css" type="text/css" />');