www/plugins/gis/lib/leaflet/plugins/Marker.Rotate.js

   1 /*
   2  * Based on comments by @runanet and @coomsie
   3  * https://github.com/CloudMade/Leaflet/issues/386
   4  *
   5  * Wrapping function is needed to preserve L.Marker.update function
   6  */
   7 (function () {
   8         var _old__setPos = L.Marker.prototype._setPos;
   9         L.Marker.include({
  10                 _updateImg: function (i, a, s) {
  11                         a = L.point(s).divideBy(2)._subtract(L.point(a));
  12                         var transform = '';
  13                         transform += ' translate(' + -a.x + 'px, ' + -a.y + 'px)';
  14                         transform += ' rotate(' + this.options.iconAngle + 'deg)';
  15                         transform += ' translate(' + a.x + 'px, ' + a.y + 'px)';
  16                         i.style[L.DomUtil.TRANSFORM] += transform;
  17                 },
  18
  19                 _getShortestEndDegree: function (startDegrees, endDegrees) {
  20                         var turnAngle = Math.abs(endDegrees - startDegrees);
  21                         var turnAnglePositive = (endDegrees - startDegrees) >= 0;
  22                         if (turnAngle <= 180) return endDegrees;
  23                         var result = startDegrees + (360 - turnAngle) * (turnAnglePositive ? -1 : 1);
  24                         return result;
  25                 },
  26
  27                 setIconAngle: function (iconAngle) {
  28                         // find shortest angle to turn over
  29                         this.options.iconAngle = this._getShortestEndDegree(this.options.iconAngle || 0, iconAngle);
  30                         if (this._map)
  31                                 this.update();
  32                 },
  33
  34                 _setPos: function (pos) {
  35                         if (this._icon)
  36                                 this._icon.style[L.DomUtil.TRANSFORM] = '';
  37                         if (this._shadow)
  38                                 this._shadow.style[L.DomUtil.TRANSFORM] = '';
  39
  40                         _old__setPos.apply(this,[pos]);
  41
  42                         if (this.options.iconAngle) {
  43                                 var defaultIcon = new L.Icon.Default();
  44                                 var a = this.options.icon.options.iconAnchor || defaultIcon.options.iconAnchor;
  45                                 var s = this.options.icon.options.iconSize || defaultIcon.options.iconSize;
  46                                 var i;
  47                                 if (this._icon) {
  48                                         i = this._icon;
  49                                         this._updateImg(i, a, s);
  50                                 }
  51                                 if (this._shadow) {
  52                                         if (this.options.icon.options.shadowAnchor)
  53                                                 a = this.options.icon.options.shadowAnchor;
  54                                         s = this.options.icon.options.shadowSize;
  55                                         i = this._shadow;
  56                                         this._updateImg(i, a, s);
  57                                 }
  58                         }
  59                 }
  60         });
  61 }());