MATLAB Central Newsreader - GUI--radioButton

GUI--radioButton

helena raz — Tue, 21 Aug 2007 16:59:40 -0400

I created a radio button in GUIDE and then right clicked
and chose "View Callback" and then selected callback. this
led to creation of a callback for that radiobutton in my
mfile. then i deleted the radiobutton call back from
mfile and ran it. i got an error:

??? Error using ==> feval
Undefined function or method 'InjectTimeOne_Callback' for
input arguments of type 'struct'.

Error in ==> gui_mainfcn at 95
feval(varargin{:});

Error in ==> finalGUI at 42
gui_mainfcn(gui_State, varargin{:});

??? Error using ==> finalGUI('InjectTimeOne_Callback',gcbo,
[],guidata(gcbo))
Error using ==> feval
Undefined function or method 'InjectTimeOne_Callback' for
input arguments of type 'struct'.

??? Error while evaluating uicontrol Callback

Is there anyway to get rid of radiobutton callback in
mfile without getting an error??

If i want to use "switch case..." for a couple of
radiobuttons, then I won't need radiobutton callbacks,
correct?

thanks a lot!

Re: GUI--radioButton

Thomas Clark — Wed, 22 Aug 2007 16:03:40 -0400

Helena;

Forgive me if I'm wrong; but I think you've missed a
fundamental point of radiobuttons. Try this, and see if it
helps your understanding of your use:

Create a button group in a GUI. It's a type of uipanel, but
should only be used for radiobuttons. Drop two radiobuttons
in there.

Leave it as it is for the mo, but you can change the
start-up values of radiobuttons if you want: right-click >
property editor > value > change from 0.0 to 1.0.

Start the GUI, then select the unselected button. They
change over automatically, with no need for switch-case or
callbacks.

Now check the m-file. No callbacks have been created.

If you want code to execute upon change of radiobutton, then
use the uibuttongroup's SelectionChangeFcn (right-click on
the panel in guide > view callbacks > SelectionChangeFcn).

If you want code to determine which of the buttons has been
pressed, use:

h = get(handles.uibuttongroup,'SelectedObject')

This returns the handle to the selected object. Then use:

s = get(h,'String')

To retrieve the string label of the individual button.

If a callback is automatically created by the GUI (e.g. if
you only want one radiobutton, so don't use a group), then
you can't just delete it without deleting the button in
GUIDE first. If it's unwanted; then what I do is just cut
and paste it right to the bottom of the m-file; then forget
about it forever :)

I hope that helps, Kind Regards

Tom Clark

Re: GUI--radioButton

helena raz — Wed, 22 Aug 2007 16:24:12 -0400

Hi Tom,
Thanks a lot for your reply.
I understand that whenever one creates a uibuttongroup
panel with a couple of radio buttons, there are no
function callbacks for the individual radio buttons. Like
you said there is SelectionChangeFcn.

In my case, however, I right clicked on one of
radiobuttons in guide and then selected callback. this
generated a callback for that specific radiobutton that I
right-clicked on. so when i tried to delete that from
the mfile (b.c the rest of the radiobuttons did not have a
callback in the mfile), I got an error.

I guess I should I have deleted that radio button as well.

Thanks for your help.

Re: GUI--radioButton

PinkLab — Thu, 29 Oct 2009 18:48:02 -0400

I have tried

Check = get(handles.uibuttongroup,'SelectedObject')
if Check == radiobutton1
% than perform this task

elseif Check == radiobutton2
% than perform this task

==================

It returns the error

???Reference to non-existent field 'uibuttongroup'

Any help please? or any alternate way to perform which radio button is selected, I need this for my push button callback, please help! thanks