extlib/leaflet/src/layer/FeatureGroup.js

   1 /*
   2  * L.FeatureGroup extends L.LayerGroup by introducing mouse events and bindPopup method shared between a group of layers.
   3  */
   4
   5 L.FeatureGroup = L.LayerGroup.extend({
   6         includes: L.Mixin.Events,
   7
   8         addLayer: function(layer) {
   9                 this._initEvents(layer);
  10                 L.LayerGroup.prototype.addLayer.call(this, layer);
  11
  12                 if (this._popupContent && layer.bindPopup) {
  13                         layer.bindPopup(this._popupContent);
  14                 }
  15         },
  16
  17         bindPopup: function(content) {
  18                 this._popupContent = content;
  19
  20                 for (var i in this._layers) {
  21                         if (this._layers.hasOwnProperty(i) && this._layers[i].bindPopup) {
  22                                 this._layers[i].bindPopup(content);
  23                         }
  24                 }
  25         },
  26
  27         _events: ['click', 'dblclick', 'mouseover', 'mouseout'],
  28
  29         _initEvents: function(layer) {
  30                 for (var i = 0, len = this._events.length; i < len; i++) {
  31                         layer.on(this._events[i], this._propagateEvent, this);
  32                 }
  33         },
  34
  35         _propagateEvent: function(e) {
  36                 e.layer = e.target;
  37                 e.target = this;
  38                 this.fire(e.type, e);
  39         }
  40 });