How do I break from a loop on keyboard input without plugins?

Question

Salah Ad-Din Ahmed 2024-5-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2114966-how-do-i-break-from-a-loop-on-keyboard-input-without-plugins

评论： Josh 2024-5-10

I have been trying to figure out for a while how to accomplish the following, but I don't want to use plugins. This is because the Psychtoolbox stopped working, and I don't want to fix it:

while 1
    % perform task
    % poll keyboard, do not stop, just check if a button is pressed
    
    if button is pressed 
        break;
    end
end

The faster the polling happens, the better.

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Josh 2024-5-9

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Answer 1

Josh 2024-5-4

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2114966-how-do-i-break-from-a-loop-on-keyboard-input-without-plugins#answer_1452316

编辑：Josh 2024-5-10

I've not implemented either of these solutions but seems to be on the right track...

https://www.mathworks.com/matlabcentral/answers/80775-how-do-i-exit-a-loop-with-a-key-hit

https://www.mathworks.com/help/matlab/ref/waitforbuttonpress.html

...pretty sure the waitforbuttonpress function followed by a "break" gets you there

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Salah Ad-Din Ahmed 2024-5-10

在 MATLAB Online 中打开

I used this answer and it works: "You can create a waitbar or any other GUI which contains a button for breaking the loop. Then check a property inside the loop and break is the value chnages. This property could be the existence of the figure or the button as well as the UserData of the button or figure.

ttonHandle = uicontrol('Style', 'PushButton', ...
                         'String', 'Stop loop', ...
                         'Callback', 'delete(gcbf)');
for k = 1:1e6
  disp(k)
  if ~ishandle(ButtonHandle)
    disp('Loop stopped by user');
    break;
  end
end