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import {LayerGroup} from './LayerGroup';
import {LatLngBounds} from '../geo/LatLngBounds';
/*
* @class FeatureGroup
* @aka L.FeatureGroup
* @inherits LayerGroup
*
* Extended `LayerGroup` that makes it easier to do the same thing to all its member layers:
* * [`bindPopup`](#layer-bindpopup) binds a popup to all of the layers at once (likewise with [`bindTooltip`](#layer-bindtooltip))
* * Events are propagated to the `FeatureGroup`, so if the group has an event
* handler, it will handle events from any of the layers. This includes mouse events
* and custom events.
* * Has `layeradd` and `layerremove` events
*
* @example
*
* ```js
* L.featureGroup([marker1, marker2, polyline])
* .bindPopup('Hello world!')
* .on('click', function() { alert('Clicked on a member of the group!'); })
* .addTo(map);
* ```
*/
export var FeatureGroup = LayerGroup.extend({
addLayer: function (layer) {
if (this.hasLayer(layer)) {
return this;
}
layer.addEventParent(this);
LayerGroup.prototype.addLayer.call(this, layer);
// @event layeradd: LayerEvent
// Fired when a layer is added to this `FeatureGroup`
return this.fire('layeradd', {layer: layer});
},
removeLayer: function (layer) {
if (!this.hasLayer(layer)) {
return this;
}
if (layer in this._layers) {
layer = this._layers[layer];
}
layer.removeEventParent(this);
LayerGroup.prototype.removeLayer.call(this, layer);
// @event layerremove: LayerEvent
// Fired when a layer is removed from this `FeatureGroup`
return this.fire('layerremove', {layer: layer});
},
// @method setStyle(style: Path options): this
// Sets the given path options to each layer of the group that has a `setStyle` method.
setStyle: function (style) {
return this.invoke('setStyle', style);
},
// @method bringToFront(): this
// Brings the layer group to the top of all other layers
bringToFront: function () {
return this.invoke('bringToFront');
},
// @method bringToBack(): this
// Brings the layer group to the back of all other layers
bringToBack: function () {
return this.invoke('bringToBack');
},
// @method getBounds(): LatLngBounds
// Returns the LatLngBounds of the Feature Group (created from bounds and coordinates of its children).
getBounds: function () {
var bounds = new LatLngBounds();
for (var id in this._layers) {
var layer = this._layers[id];
bounds.extend(layer.getBounds ? layer.getBounds() : layer.getLatLng());
}
return bounds;
}
});
// @factory L.featureGroup(layers: Layer[])
// Create a feature group, optionally given an initial set of layers.
export var featureGroup = function (layers) {
return new FeatureGroup(layers);
};
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