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/**
* Adds 1 public method to MCG and 1 to L.Marker to facilitate changing
* markers' icon options and refreshing their icon and their parent clusters
* accordingly (case where their iconCreateFunction uses data of childMarkers
* to make up the cluster icon).
*/
L.MarkerClusterGroup.include({
/**
* Updates the icon of all clusters which are parents of the given marker(s).
* In singleMarkerMode, also updates the given marker(s) icon.
* @param layers L.MarkerClusterGroup|L.LayerGroup|Array(L.Marker)|Map(L.Marker)|
* L.MarkerCluster|L.Marker (optional) list of markers (or single marker) whose parent
* clusters need to be updated. If not provided, retrieves all child markers of this.
* @returns {L.MarkerClusterGroup}
*/
refreshClusters: function (layers) {
if (!layers) {
layers = this._topClusterLevel.getAllChildMarkers();
} else if (layers instanceof L.MarkerClusterGroup) {
layers = layers._topClusterLevel.getAllChildMarkers();
} else if (layers instanceof L.LayerGroup) {
layers = layers._layers;
} else if (layers instanceof L.MarkerCluster) {
layers = layers.getAllChildMarkers();
} else if (layers instanceof L.Marker) {
layers = [layers];
} // else: must be an Array(L.Marker)|Map(L.Marker)
this._flagParentsIconsNeedUpdate(layers);
this._refreshClustersIcons();
// In case of singleMarkerMode, also re-draw the markers.
if (this.options.singleMarkerMode) {
this._refreshSingleMarkerModeMarkers(layers);
}
return this;
},
/**
* Simply flags all parent clusters of the given markers as having a "dirty" icon.
* @param layers Array(L.Marker)|Map(L.Marker) list of markers.
* @private
*/
_flagParentsIconsNeedUpdate: function (layers) {
var id, parent;
// Assumes layers is an Array or an Object whose prototype is non-enumerable.
for (id in layers) {
// Flag parent clusters' icon as "dirty", all the way up.
// Dumb process that flags multiple times upper parents, but still
// much more efficient than trying to be smart and make short lists,
// at least in the case of a hierarchy following a power law:
// http://jsperf.com/flag-nodes-in-power-hierarchy/2
parent = layers[id].__parent;
while (parent) {
parent._iconNeedsUpdate = true;
parent = parent.__parent;
}
}
},
/**
* Re-draws the icon of the supplied markers.
* To be used in singleMarkerMode only.
* @param layers Array(L.Marker)|Map(L.Marker) list of markers.
* @private
*/
_refreshSingleMarkerModeMarkers: function (layers) {
var id, layer;
for (id in layers) {
layer = layers[id];
// Make sure we do not override markers that do not belong to THIS group.
if (this.hasLayer(layer)) {
// Need to re-create the icon first, then re-draw the marker.
layer.setIcon(this._overrideMarkerIcon(layer));
}
}
}
});
L.Marker.include({
/**
* Updates the given options in the marker's icon and refreshes the marker.
* @param options map object of icon options.
* @param directlyRefreshClusters boolean (optional) true to trigger
* MCG.refreshClustersOf() right away with this single marker.
* @returns {L.Marker}
*/
refreshIconOptions: function (options, directlyRefreshClusters) {
var icon = this.options.icon;
L.setOptions(icon, options);
this.setIcon(icon);
// Shortcut to refresh the associated MCG clusters right away.
// To be used when refreshing a single marker.
// Otherwise, better use MCG.refreshClusters() once at the end with
// the list of modified markers.
if (directlyRefreshClusters && this.__parent) {
this.__parent._group.refreshClusters(this);
}
return this;
}
});
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