code: function (event) {
              var point = this.getMousePoint(event);
  
              if (this._crop instanceof IMSoftcrop.Softcrop && typeof this.handle === 'string') {
                  this.updateImageInfo(true);
                  this._dragPoint = point;
                  this._dragObject = this.handle;
              }
              else if (this._crop instanceof IMSoftcrop.Softcrop && this._crop.inArea(point)) {
                  this.updateImageInfo(true);
                  this._dragObject = this._crop;
                  this._dragPoint = point;
              }
              else if (this._image instanceof IMSoftcrop.Image && this._image.inArea(point)) {
                  this.updateImageInfo(false);
                  this._dragObject = this._image;
                  this._dragPoint = point;
              }
          }
docs: On mouse down event handler
  @param event