How to fix error done by pressing "Cancel" button

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Jethro
Jethro le 18 Jan 2012
Commenté : Titus Edelhofer le 28 Nov 2023
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??

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Titus Edelhofer
Titus Edelhofer le 18 Jan 2012
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
  4 commentaires
Ivan Demec
Ivan Demec le 28 Nov 2023
Your answer breaks the code if you use the multiselect option of the UIgetFile i.e.,
Undefined function 'eq' for input arguments of type 'cell'.
@Walter Roberson your solution works with multiselect. Thank you
Titus Edelhofer
Titus Edelhofer le 28 Nov 2023
Interesting coincidence: I wrote the answer a decade ago, and most often still use the filename==0 test. Believe it or not, just about 2 weeks ago I stumbled across my own solution not working (anymore) in case of multiselect :)

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Plus de réponses (2)

Walter Roberson
Walter Roberson le 18 Jan 2012
Sorry, Cancel in which window exactly? And do you mean Cancel or do you mean the window close button? saveas() itself does not have a Cancel. If you are referring to something like a callback initiated from a window, have you considered setting the Cancel button to 'enable', 'off' during the time the saveas operation is going on?

Jethro
Jethro le 18 Jan 2012
I write you my code, maybe it can help you to understand my situation...
function PB_S_G_Callback(hObject, eventdata, handles)
F=getframe(handles.G1_Grafico); %select axes in GUI
global fout
[fout path]=uiputfile({'*.png'; '.bmp'; '.jpg'; '.gif'; '.tiff'})
global fpath
fpath = strcat(path, fout);
a=saveas(gcf, fpath);
I want to use this code to save my plots (the callback name means Pushbutton to Save Plots): When opening my "save window", I can press OK (to save) or CANCEL (to cancel operation)... If I press CANCEL, Matlab shows me an error...
EDIT: I solved with Titus code, now it works correctly!!
function PB_S_G_Callback(hObject, eventdata, handles)
F=getframe(handles.G1_Grafico); %select axes in GUI
global fout
[fout path]=uiputfile({'*.png'; '.bmp'; '.jpg'; '.gif'; '.tiff'})
if fout==0
return
end
global fpath
fpath = strcat(path, fout);
a=saveas(gcf, fpath);
THANKS A LOT!
  1 commentaire
Walter Roberson
Walter Roberson le 18 Jan 2012
Yes, always test the output of uiputfile(), uigetfile(), uigetdir(), uiputdir()

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