MATLAB: How to change the CloseRequestFcn ?

closerequestfcnquestdlg

I've tried to modify the CloseRequestFcn and add a questdlg but it doesn't work :/ Here is the code I used: *

function mymenu_CloseRequestFcn(obj, event, handles)
selection = questdlg('Save data?',...
                    '','Yes','No');
 switch selection,
   case 'Yes',
     delete(hObject);
   case 'No'
     return
 end*

Best Answer

Hey I found a solution I added :

*set(handlesname,'CloseRequestFcn',@myrequest)* 
and the code is :
function myrequest(obj, event, handles)
selection = questdlg('Save data?',...
                    '','Yes','No');
 switch selection,
   case 'Yes',
     delete(hObject);
   case 'No'
     return
 end*

Related Solutions

MATLAB: How to change the Gui close function whithout changing the close function of figures

Mathieu - my understanding of the DefaultFigureCloseRequestFcn is that once set at the root level (0), then MATLAB uses this setting for the CloseRequestFcn of all subsequently created figures.

I think what you want to do instead is just modify the CloseRequestFcn for your GUI figure. If you are using GUIDE, then you should click the figure and select (from the menu) View --> View Callbacks --> CloseRequestFcn and the following should appear in the editor

 % --- Executes when user attempts to close YourGuiName.
function YourGuiName_CloseRequestFcn(hObject, eventdata, handles)
% hObject    handle to YourGuiName (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: delete(hObject) closes the figure delete(hObject);

You could then change the body to something like

 selection = questdlg('Close YourGuiName?',...
                     'Close Request Function',...
                     'Yes','No','Yes');
 switch selection,
   case 'Yes',
     delete(hObject);
   case 'No'
     return
 end

To do something more similar to the code you have written in your question, you could do

 set(figure_handle,'CloseRequestFcn','my_closereq')

where figure_handle is the handle to your figure. Note how we use CloseRequestFcn (just like the GUIDE approach) which will affect figure_handle only and not be the default behaviour for all other figures.

Try the above and see what happens!

MATLAB: What is wrong with the exit button

I tried your code and it works without any of the problems you describe, they might be caused by other code.

Just two small suggestions, the close all doesn't need the ; at the end, it's common to both Yes and No responses (also the cancel got the return line), you can remove those two "close all" lines put it after the end of that code.

Best Answer

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MATLAB: How to change the Gui close function whithout changing the close function of figures

MATLAB: What is wrong with the exit button

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