addEvent(actions) {
    const apply = this._applyEventHandler.bind(this);
    const cancel = this._cancelEventHandler.bind(this);
    const cropzonePreset = this._cropzonePresetEventHandler.bind(this);

    this.eventHandler = {
      apply,
      cancel,
      cropzonePreset,
    };

    this.actions = actions;
    this._els.apply.addEventListener('click', apply);
    this._els.cancel.addEventListener('click', cancel);
    this._els.preset.addEventListener('click', cropzonePreset);
  }
Add event for crop
@param {Object} actions - actions for crop
  @param {Function} actions.crop - crop action
  @param {Function} actions.cancel - cancel action
  @param {Function} actions.preset - draw rectzone at a predefined ratio