Using WindowKeyPressFcn with uicontrol

From my code

snap = uicontrol(f,'Style','pushbutton','String','Recognize',... 'units','characters',... 'Position',[5 1.5 30 5],'Callback',{@snapshot_callback});

How to push button by using key press from keyboard and if I want to push button by spacebar how to specify it?

Thank you so much :)

[Geoff Hayes]

Ara - what is it exactly that you want to happen? Do you want a pressed key on the keyboard to simulate the pressing of a button on the GUI?

[Ara]

Yes

Answer 1

[Geoff Hayes]

Ara - if you want the pressing of the spacebar to simulate the pressing of the snap button, you can do the following: in your code that generates the GUI, assign a callback to the figure for the WindowKeyPressFcn as

 set(f,'WindowKeyPressFcn',@keyPressCallback);

where f is your figure. The keyPressCallback will be called whenever the figure/GUI has focus and a key on the keyboard is pressed. Now define the callback (within the same file) as

 function keyPressCallback(source,eventdata)

      % determine the key that was pressed
      keyPressed = eventdata.Key;

      if strcmpi(keyPressed,'space')
          % the key that was pressed was the space bar so set focus to 
          % the snap button
          uicontrol(snap);

          % invoke the callback for the snap button
          snapshot_callback(snap,[]);
      end
  end

In the above, we use uicontrol to set focus to the snap button, and then we call its callback. I had to do this in my environment, so make sure that it is necessary for you to do the same. (Using uincontrol didn't automatically call the callback for the button.)

Try the above and see what happens!

[Ara]

Thank you It's work! :)

[Thomas Hermelin]

Hi, what if the GUI was made in GUIDE?

Thanks !

[Geoff Hayes]

Thomas - you could probably use the above and just set the callback for the WindowKeyPressFcn in the OpenFcn of the GUI

set(handles.figure1,'WindowKeyPressFcn',@keyPressCallback);

where you handles.figure1 is the handle to the GUIDE-created GUI.

[Le Dung]

Dear Geoff Hayes

i have a problem. could you help me.

i have a GUI contains a listbox and a editbox. as picture below:

Listbox have a array of strings:

a

an

able

back

bath

bench

car

create

common

claim

dad

did

dear

eat

edit

english

enable

far

father

fish

jacket

jet

kiss

gather

get

gun

...

and so on

Now, i want to type a word "jacket" (for example) into edittext. i expect when i type word "j" on edittext, the listbox will display all word that begin with word "j". Similarly, when i import a consecutive word, "a", (now, i'm having "ja" on edittext). the listbox will display all word that contains words "ja". and so on

Thank you so much

[Walter Roberson]

you already have an open question on this where people have been giving you code.

[Le Dung]

Yes. Thank you so much.

I know. but i don't know how to use KeyPressFcn for my problem