Get gui to run a command when getting an error from trying to rewrite a file that is open, or the user cancel during save.

Hi

I have this GUI where the user gets to save a print of the GUI to a PDF, during that process some of the popup-menu, edit-boxes and check-boxes are changed to invisible due to the fact I don't want the "client" to see the input. And after the user has saved the file, the code makes them visible again. But this leaves me with a little problem.

Because if the user tries to overwrite a PDF that is already open, this leaves an error, and the code behind the save function doesn't run, and thereby it doesn't make the popup-menu visible again.

The same occurs of the user cancels the save during the process, here again the different, popup-menu's, edit-boxes and check-boxes are left invisible.

My question is:

Is there a way to catch the error, show it to the user so they know that they are trying to rewrite a file that is open, and then afterwards run the rest of the code so the popup-menu's, edit-boxes and check-boxes becomes visible again?

    [FileName,PathName] = uiputfile('*.pdf','Save Print',[handles.workingPath '\Mydata');

I've tried reading try and catch commands, but don't understand what to do.

Answer 1

[Jan]

... Your code to make the GUI parts invisible comes here

Folder = fullfile(handles.workingPath, 'Mydata');  % FULLFILE is safer than []
[FileName, PathName] = uiputfile('*.pdf', 'Save Print', Folder);
if ~isequal(FileName, 0)  % User did not hit Cancel
  try
    ... Your code to save the file as PDF
  catch ME
    % Inform the user about the problem:
    fprintf('PDF export failed: %s\n', ME.message);
  end
end

... the code to re-enable the visibility again comes here