MATLAB: How to pause until the “return” key is pressed

currentkeypause

I have a gui that I need to have wait until the return key is pressed before advancing. Below is my code but I keep getting an error saying:

Error using == Matrix dimensions must agree.

Error in RunDlg_bab>ok_Callback (line 388) if currkey=='return'

Below is my code:

    currkey=0;
    % do not move on until enter key is pressed
    while currkey~=1
        pause; % wait for a keypress
        currkey=get(gcf,'CurrentKey'); 
        if currkey=='return'
            currkey==1
        else
            currkey==0
        end
    end

Any sort of help would be really appreciated!

Best Answer

You may be able to use waitforbuttonpress.

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MATLAB: Get “RETURN” key press using “CurrentCharacter” returns and empty string.

Gabriel - to be clear, are you expecting the user to type in RETURN or DELETE or press the return or delete keys on the keyboard? The following line of code

 key = get(fig, 'CurrentCharacter');

will just return the character of the pressed key. For a button like return, key will be an empty character.

If you want to capture the input from the keyboard, then I would change your callback to

function keyRead(src, event)
    key = event.Key;
    fprintf('The key being pressed is: %s\n', key);
end

By the way, I'm not sure why you have the uiwait or are using the f instead of fig. What is the intent of the former, and is the latter a typo?

MATLAB: How to prevent two simultaneous key presses from tabbing away from the GUI

Use a WindowKeyPressFcn callback in the figure instead.

Best Answer

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MATLAB: Get “RETURN” key press using “CurrentCharacter” returns and empty string.

MATLAB: How to prevent two simultaneous key presses from tabbing away from the GUI

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