tsgqc_GUI.m

    % set tsg.levitus empty before save preferences in mat file
    % ---------------------------------------------------------
    tsg.levitus = [];

    % save preference mat file
    % ------------------------
    save( config_file, 'root', 'tsg');

    % If the data have been modified and not save, the program
    % ask to save the data
    % --------------------------------------------------------
    if  strcmp( get( hSaveMenu, 'UserData' ), 'on')
      selection = ...
        questdlg('The file has been modified.  Do you want to save it ?',...
        'Save before Quit?',...
        'Yes', 'No', 'Yes');
      
      if strcmp(selection, 'Yes')
        
        % call File/Save Menu Callback before before quit
        % -----------------------------------------------
        SaveMenuCallback;
             
      end
      
      % quit program
      % ------------
      QuitProgram;
      
    else
      selection = ...
        questdlg(['Quit ' get(hMainFig, 'Name') '?'],...
        ['Quit ' get(hMainFig, 'Name') '?'],...
        'Yes', 'No', 'Yes');
      if strcmp(selection, 'No')
        return;
      else
        QuitProgram;
      end
    end

  end

%% QuitProgram
  % -----------------------------------------------------------------
  % call from: 
  %   QuitMenuCallback
  %   callback 'CloseRequestFcn', @QuitProgram
  % -----------------------------------------------------------------
  function QuitProgram(hObject, eventdata)
    
    % close the main windows
    % ----------------------
    delete(hMainFig);
    
    % reset userdata property of root Matalab object (0) for next use
    % ---------------------------------------------------------------
    set(0, 'userdata', []);

    % reset Matlab search path to default
    % -----------------------------------
    rmpath( [DEFAULT_PATH_FILE filesep 'tsg_util'] );
    rmpath( [DEFAULT_PATH_FILE filesep 'tsg_data'] );
    rmpath( [DEFAULT_PATH_FILE filesep 'tsg_io'] );
    
    % Refresh file system caches
    % --------------------------
    rehash;
    
  end

% end of tsgqc_GUI
% ----------------
end