MATLAB: How to fix error done by pressing “Cancel” button

cancelerrorsaveas

Hi everybody!

I wrote a simple function to save my axes using saveas funct. but if I click on "Cancel" in the opened window, I have an error in my Matlab… There's a way to interrupt the operation of saving if users press "Cancel" without an error??

Best Answer

Hi,

the uiputfile dialog returns 0 for the filename if the user presses cancel:

filename = uiputfile;
if filename==0
  % user pressed cancel
  return
end
% go on with saving your data ...

Titus

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MATLAB: Select an image folder in GUI

See the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

I'd just use one folder - not myFolder and not sourceFolder. Just pick one and attach it to handles.

function selectSourceButton_Callback(hObject, eventdata, handles)
  sourceFolder = uigetdir();
  set(handles.sourceFolderEdit, 'string', sourceFolder );
  handles.sourceFolder = sourceFolder;
  guidata(hObject, handles);
function startButton_Callback(hObject, eventdata, handles)
if ~isdir(handles.sourceFolder)
  errorMessage = sprintf('Error: The following folder does not exist:\n%s', handles.sourceFolder);
  uiwait(warndlg(errorMessage));
  return;
end
filePattern = fullfile(handles.sourceFolder, '*.jpg');
jpegFiles = dir(filePattern);
for k = 1:length(jpegFiles)
      baseFileName = jpegFiles(k).name;
      fullFileName = fullfile(handles.sourceFolder, baseFileName);
      fprintf(1, 'Now reading %s\n', fullFileName);
      imageArray = imread(fullFileName);
end

MATLAB: Gui Screen Shot Button

Try this snippet to get a valid filename.

% Note, if you're saving an image you can use imsave() instead of uiputfile().
startingFolder = userpath
defaultFileName = fullfile(startingFolder, '*.*');
[baseFileName, folder] = uiputfile(defaultFileName, 'Specify a file');
if baseFileName == 0
  % User clicked the Cancel button.
  return;
end
fullFileName = fullfile(folder, baseFileName)

Then use fullFileName instead of "Sections" in saveas(), or better yet export_fig.

Best Answer

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MATLAB: Select an image folder in GUI

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