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How to request user input to press Esc or Enter ?

13 vues (au cours des 30 derniers jours)
Sim
Sim le 13 Déc 2022
Commenté : Sim le 13 Déc 2022
How to request user input to press Esc or Enter ?
% this is a pseudo-code I wrote just to give an idea about what I am trying to achieve:
answer = input('Please enter Esc to exit this code or Enter to continue:');
keepRunning = true;
while (keepRunning)
if (answer ~= Esc && answer ~= Enter) % If the user does not input either Esc or Enter
answer = input('ERROR. Please enter Esc to exit this code or Enter to continue:');
elseif (answer == Esc) % Exit this code
disp('exit the code')
keepRunning = false;
return
elseif (answer == Enter) % Continue this code and do stuff
disp('continue to run this code')
keepRunning = false;
continue % or do stuff here
end
end

Réponse acceptée

Jan
Jan le 13 Déc 2022
Modifié(e) : Jan le 13 Déc 2022
This will not work. The input command is not sufficient to catch a pressed Esc key.
Using the input capabilities of the command window to interprete key clicks is a bad choice in general. Use a figure instead, which is nicer and allows to analyse the pressed keys using the WindowKeyPressFcn and even the WindowKeyReleaseFcn.
The command window is not powerful enough to solve such genereal purpose GUI jobs. You can do it using the undocumented Java interface, but this is fragile.
  1 commentaire
Sim
Sim le 13 Déc 2022
Great answer @Jan!! Thanks for showing the possible ways to take :-)

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