How to move a marker in Google Maps API
I'm using the Google Maps API V3 and I'm trying to make a marker move across the screen. Here's what I have:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<script type="text/javascript"
src="http://maps.googleapis.com/maps/api/js?sensor=false">
</script>
<script type="text/javascript">
function initialize() {
var myLatLng = new google.maps.LatLng(50,50);
var myOptions = {
zoom: 4,
center: myLatLng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
image = 'bus.gif';
marker = new google.maps.Marker({position: myLatLng, map: map, icon: image});
marker.setMap(map);
}
function moveBus()
{
// Move Bus
}
</script>
</head>
<body onload="initialize()">
<script type="text/javascript">
moveBus();
</script>
<div id="map_canvas" style="height: 500px; width: 500px;"></div>
</body>
</html>
Now what I've tried is replacing // Move Bus with
marker.setPosition(new google.maps.LatLng(0,0));
But that didn't do anything. That's the command I saw on the API reference. I'm also relatively new to Javascript, so it might be a JS error on my part.
Answer
moveBus() is getting called before initialize(). Try putting that line at the end of your initialize() function. Also Lat/Lon 0,0 is off the map (it's coordinates, not pixels), so you can't see it when it moves. Try 54,54. If you want the center of the map to move to the new location, use panTo().
Demo: http://jsfiddle.net/ThinkingStiff/Rsp22/
HTML:
<script src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<div id="map-canvas"></div>
CSS:
#map-canvas
{
height: 400px;
width: 500px;
}
Script:
function initialize() {
var myLatLng = new google.maps.LatLng( 50, 50 ),
myOptions = {
zoom: 4,
center: myLatLng,
mapTypeId: google.maps.MapTypeId.ROADMAP
},
map = new google.maps.Map( document.getElementById( 'map-canvas' ), myOptions ),
marker = new google.maps.Marker( {position: myLatLng, map: map} );
marker.setMap( map );
moveBus( map, marker );
}
function moveBus( map, marker ) {
marker.setPosition( new google.maps.LatLng( 0, 0 ) );
map.panTo( new google.maps.LatLng( 0, 0 ) );
};
initialize();