void ExecuteCommandExportToTxt(object o)
        {
            if (HeightmapPresenter.HeightmapLayer == null)
            {
                MasterView.ShowErrorOKMessage("No heightmap rendered yet");
                return;
            }

            try
            {
                IExportManager exportMgr = new ExportManager();

                var path  = MasterView.GetSaveFilePath();
                var layer = this.HeightmapPresenter.HeightmapLayer;
                exportMgr.ExportToFile(path, layer, MinHeight, MaxHeight);
                MasterView.ShowInfoOKMessage("Exported");
            }
            catch (IOException e)
            {
                MasterView.ShowErrorOKMessage(e.Message);
            }
        }