code: function(event) {
              event.preventDefault();
              event.stopPropagation();
  
              if (typeof this._image == 'undefined') {
                  return false;
              }
  
              this.toggleLoadingImage(true);
  
              var point = this.getMousePoint(event);
              this._image.addFocusPoint(
                  this.canvasPointInImage(point.x, point.y),
                  40
              );
  
              if (this._image.autocrop()) {
                  this.redraw();
                  this.toggleLoadingImage(false);
              }
  
              return false;
          }
docs: Add focus point
  @param event