Attached is a small program that you may try to see whether it is suitable for your purpose of not.
It will open an empty figure and trigger the callback when any key is pressed.
When the 'Enter' key is detected, it will log the current time and the time difference between 2 instances will be calculated.
function recordAction(src,event)
f = figure('WindowKeyPressFcn',@keyPress);
record = []; % Variable store the instance when 'Enter' key is pressed
%%
function keyPress(src,event)
key = get(src,'CurrentKey'); % Get the key pressed
if(strcmp (key , 'return'))
record = [record;datetime('now','Format','dd-MMM-yyyy HH:mm:ss.SSS')];
Delta =diff(record); % Calculate time difference
Delta.Format = 'hh:mm:ss.SSS'; % Set the duration format
display(Delta) % Display the time difference
end
end
end
