Use diary off with Closerequestfcn

Hello everybody,

I am trying to incorporate the diary off command within the Close RequestFcn expression, but I always get an error, here the details:

The idea: I open a figure and then start to record the command window. Then, if I manually close the figure by pressing on the x at the top right corner of the figure window, the command window displays a text and, at the same time, the diary stops recording.

Here is the code that does not work:

fig = figure();
diary write.txt;
fig.CloseRequestFcn = @(~,~){fprintf('Script aborted\n'); close(fig, 'force'); diary('off')};

Here is the error:

Error using diary

Too many output arguments.

Error in Temp4>@(~,~){fprintf('Script aborted\n');close(fig,'force');diary('off')} (line 5)

fig.CloseRequestFcn = @(~,~){fprintf('Script aborted\n'); close(fig, 'force'); diary('off')};

Error while evaluating DestroyedObject CloseRequestFcn.

Note: if I remove "diary off" from the expression it works fine, but then I cannot delete write.txt file until I manually type "diary off" in the command window.

I hope I managed to explain myself. Really thank you in advance to everyone for the help!

Answer 1

[Abhinav Aravindan]

Hi @PierC,

A similar issue to yours has been addressed in the following link:

https://www.mathworks.com/matlabcentral/answers/1687289

To resolve the issue, you may instead define a seperate function to implement the required operations as follows:

fig = figure();
diary('write.txt');
fig.CloseRequestFcn = @(src, event) closeFigureFcn(src);

function closeFigureFcn(fig)
    fprintf('Script aborted\n'); 
    diary('off');               
    delete(fig);                 
end

Please refer to the below documentation for further detail:

https://www.mathworks.com/help/matlab/ref/matlab.ui.figure-properties.html#:~:text=expand%20all-,CloseRequestFcn,-%E2%80%94%20Close%20request