L.Cluster = L.Marker.extend({
	
	initialize: function(marker, options) {
		L.Marker.prototype.initialize.call(this, marker, options);
		this._markers = [this];
	},
	
	ajouterMarker: function(marker) {
		this._markers.push(marker);
	},
	
	recupererMarkers: function() {
		return this._markers;
	},
	
	obtenirNombreMarkers: function() {
		return this._markers.length;
	},
	
	supprimerSource: function(sourceSupression) {
		var index = 0;
		while (index < this._markers.length) {
			if (this._markers[index].source == sourceSupression) {
				this._markers.splice(index, 1);
			} else {
				index ++;
			}
		}
		if (this._markers.length == 0) {
			if (this._map != null) {
				this._map.removeLayer(this);
				//this._map.getPanes().markerPane.removeChild(this._icon);
			}
			delete this;
		}
	},
	
	supprimer: function() {
		while (this._markers.length > 0) {
			this._markers.splice(0, 1);
		}
		if (this._map != null) {
			this._map.removeLayer(this);
			//this._map.getPanes().markerPane.removeChild(this._icon);
		}
		delete this;
	}
	
});



L.ClusterGroup = L.FeatureGroup.extend({
	
	initialize: function(layers) {
		L.FeatureGroup.prototype.initialize.call(this, layers);
		this._distance = 10;
		this._resolution = 0;
		this._nombreClusters = 0;
	},

	ajouterPoint: function(layer) {
		if (this._resolution == 0) {
			this._resolution = (2 * Math.PI * 6378137) / (256 * Math.pow(2, this._map.getZoom()));
		}
		var seuilCluster = this._distance * this._resolution;
		if (typeof(layer._latlng) != 'undefined') {
			var indexClusterPlusProche = this._chercherVoisinPlusProche(layer);
			var ajoute = false;
			if (indexClusterPlusProche != null) {
				var distance = this._layers[indexClusterPlusProche].getLatLng().distanceTo(layer.getLatLng());
				if (distance < seuilCluster) {
					this._layers[indexClusterPlusProche].ajouterMarker(layer);
					ajoute = true;
				}
			}
			if (!ajoute) {
				this._layers[this._nombreClusters] = layer;
				this._nombreClusters ++;
			}
		}
	},
	
	_chercherVoisinPlusProche: function(layer) {
		var distance = -1;
		var plusProche = null;
		for (var numeroLayer in this._layers) {
			if (typeof(this._layers[numeroLayer]) != 'undefined') {
				var centre = this._layers[numeroLayer].getLatLng();
				if (distance == -1 || centre.distanceTo(layer.getLatLng()) < distance) {
					plusProche = numeroLayer;
					distance = centre.distanceTo(layer.getLatLng());
				}
			}
		}
		return plusProche;
	},
	
	afficherClusters: function() {
		for (var numeroLayer in this._layers) {
			if (typeof(this._layers[numeroLayer]) != 'undefined') {
				var layer = this._layers[numeroLayer];
				if (layer.obtenirNombreMarkers() > 1) {
					layer.setIcon(new L.Icon({ iconUrl : clusterImageUrl, iconSize : [20, 20] }))
				}
				layer.addTo(map);
			}
		}
	},
	
	supprimerPoint: function(layer) {
		layer.supprimer();
	}
	
});