[ka-Map-users] Memory leaks in kaXmlOverlay?

[Øyvind Hanssen]

I started KaXmlOverlay the following way:

var myCoordinates = myMovingOverlay = myInterval = null;

function localOnLoad()
{
	...
	myKaMap.registerForEvent( KAMAP_MAP_INITIALIZED, null, localMapInitialized );
        ...
}


function localMapInitialized( eventID, mapName ) {
    myMovingOverlay = new kaXmlOverlay( myKaMap, 250 );
    myMovingOverlay.loadXml('XMLDATAURL');
	myInterval = setInterval("myMovingOverlay.loadXml('XMLDATAURL')", 20000);
}

If you use multiple mapfiles, a new overlay is created each time the user
switches between mapfiles. This leads to problems of course.  So, I just add
a test if an overlay already exists: 
 
function localMapInitialized( eventID, mapName ) {
    if (myMovingOverlay == null)  {
        myMovingOverlay = new kaXmlOverlay( myKaMap, 250 );
        ...
    }
   ...
}

Alternatively, one can remove the existing one before creating a new. 

Regards
Øyvind