extlib/leaflet/src/handler/MarkerDrag.js

   1 /*
   2  * L.Handler.MarkerDrag is used internally by L.Marker to make the markers draggable.
   3  */
   4
   5 L.Handler.MarkerDrag = L.Handler.extend({
   6         initialize: function(marker) {
   7                 this._marker = marker;
   8         },
   9
  10         enable: function() {
  11                 if (this._enabled) { return; }
  12                 if (!this._draggable) {
  13                         this._draggable = new L.Draggable(this._marker._icon, this._marker._icon);
  14                         this._draggable.on('dragstart', this._onDragStart, this);
  15                         this._draggable.on('drag', this._onDrag, this);
  16                         this._draggable.on('dragend', this._onDragEnd, this);
  17                 }
  18                 this._draggable.enable();
  19                 this._enabled = true;
  20         },
  21
  22         disable: function() {
  23                 if (!this._enabled) { return; }
  24                 this._draggable.disable();
  25                 this._enabled = false;
  26         },
  27
  28         moved: function() {
  29                 return this._draggable && this._draggable._moved;
  30         },
  31
  32         _onDragStart: function(e) {
  33                 this._marker.closePopup();
  34
  35                 this._marker.fire('movestart');
  36                 this._marker.fire('dragstart');
  37         },
  38
  39         _onDrag: function(e) {
  40                 // update shadow position
  41                 var iconPos = L.DomUtil.getPosition(this._marker._icon);
  42                 L.DomUtil.setPosition(this._marker._shadow, iconPos);
  43
  44                 this._marker._latlng = this._marker._map.layerPointToLatLng(iconPos);
  45
  46                 this._marker.fire('move');
  47                 this._marker.fire('drag');
  48         },
  49
  50         _onDragEnd: function() {
  51                 this._marker.fire('moveend');
  52                 this._marker.fire('dragend');
  53         }
  54 });