How to determine if enter(return) was pressed ?

Hi,

in one part of my code I need to determine if enter(return) was pressed. I am useing simple part of code:

kkey = get(gcf,'CurrentCharacter');

if strcmp(kkey, %comparing parameter)

    % my code

end

which works very well for every key imaginable except return key...when I try to examine it step by step I found that if I press for example number 1:

kkey = '1'

but when I press return field is suddenly 1x1char and blank...why is that ? shouldnt kkey variable be '13' like in the ascii that coresponds to return ??

From my point of view it's wierd...How can I than compare it ??

Thanks, Peter

Answer 1

[Petr]

Solution was simple and enough elegant for me...

.

function pushbutton1_KeyPressFcn(hObject, eventdata, handles)

    key = get(gcf,'CurrentKey');

    if(strcmp (key , 'return'))

        pushbutton1_Callback(hObject, eventdata, handles)

    end

function pushbutton1_Callback(hObject, eventdata, handles)

    %code to be executed

Answer 2

[Sven]

Hi Peter,

I've found that it's often easier to supply an onKeyPress function like follows:

function testme()
figure('KeyPressFcn', @(src,evnt)onKeyPressRelease(evnt,'press'),...
    'KeyReleaseFcn',@(obj,evnt)onKeyPressRelease(evnt,'release')...
    );

end
function onKeyPressRelease(evnt, pressRelease)
disp(evnt)
disp(pressRelease)
end

If you test this, you'll see that you can capture "return" in the event.Key property:

      Character: '
  '
       Modifier: {1x0 cell}
            Key: 'return'

And you will know whether it was just pressed or released.

Thanks, Sven.