File: kmloverlay.js

/*
 *
 * @(#) $Id: kmloverlay.js,v 1.2 2010/09/07 22:49:18 mlemos Exp $
 *
 */

if(typeof(ML) === 'undefined')
	ML = { }

if(typeof(ML.Maps) === 'undefined')
	ML.Maps = { }

if(typeof(ML.Maps.KMLOverlay) === 'undefined')
{

ML.Maps.KMLOverlay = function(url, options)
{
	this.url = url;
	this.markers = [];
	this.placemarks = [];
	this.styles = [];
	this.icons = ((options && options.icons) ? options.icons : []);

	this.parseKML = function(kml)
	{
		var placemarks = kml.getElementsByTagName('Placemark')
		for(var p = 0; p<placemarks.length; p++)
		{
			this.placemarks[p] = { };
			this.placemarks[p].name = placemarks[p].getElementsByTagName('name')[0].childNodes[0].nodeValue;
			this.placemarks[p].description = placemarks[p].getElementsByTagName('description')[0].childNodes[0].nodeValue;
			this.placemarks[p].styleurl = placemarks[p].getElementsByTagName('styleUrl')[0].childNodes[0].nodeValue;
			var coordinates = placemarks[p].getElementsByTagName('coordinates')[0].childNodes[0].nodeValue;
			var c = coordinates.split(',');
			this.placemarks[p].longitude = parseFloat(c[0]);
			this.placemarks[p].latitude = parseFloat(c[1]);
		}
		var styles = kml.getElementsByTagName('Style')
		for(var s = 0; s<styles.length; s++)
		{
			var style = '#' + styles[s].getAttribute('id');
			var icons = styles[s].getElementsByTagName('Icon');
			if(icons.length > 0)
			{
				var href = icons[0].getElementsByTagName('href')[0].childNodes[0].nodeValue;
				this.styles[style] = { image: href };
			}
		}
	}

	this.addplacemarks = function()
	{
		for(var p = 0; p < this.placemarks.length; p++)
		{
			var options = { };
			var style = this.placemarks[p].styleurl;
			if(this.styles[style])
			{
				if(!this.icons[style])
				{
					this.icons[style] = new GIcon(G_DEFAULT_ICON, this.styles[style].image );
					this.icons[style].iconSize = new GSize(32,32);
					this.icons[style].shadowSize = new GSize(59,32);
					this.icons[style].dragCrossAnchor = new GPoint(2,8);
					this.icons[style].iconAnchor = new GPoint(16,32);
				}
				options.icon = this.icons[style];
			}
			this.markers[p] = new GMarker(new GLatLng(this.placemarks[p].latitude, this.placemarks[p].longitude), options);
			this.markers[p].kmlinformation = '<b>' + this.placemarks[p].name + '</b><br />' + this.placemarks[p].description;
			GEvent.addListener(this.markers[p], 'click', function() { this.openInfoWindowHtml( this.kmlinformation );});
			this.map.addOverlay(this.markers[p]);
		}
	}

	this.initialize = function(map)
	{
		var self = this;
		this.map = map;
		_IG_FetchXmlContent(this.url, function(kml)
			{
				self.parseKML(kml);
				self.addplacemarks();
			}
		);
	}

	this.redraw = function(force)
	{
	}

	this.remove = function()
	{
		for(var m = 0; m < this.markers.length; m++)
			this.map.removeOverlay(this.markers[m]);
	}

	this.copy = function()
	{
		return new ML.Maps.KMLOverlay(this.url);
	}

	this.prototype = new GOverlay();
}

}