Why is the edit text box not enabling ?

The text box in the red circle should be enabled when the 'bleed-off' box is cheked, but nothing happens. EDIT Tag of the text box: nbo. Tag of the chek box: nboBox

The radiobuttons on the left enable one of the colored boxes and disables the 2 others. Here is the SelectionChangeFcn of the button panel:

function CycleChoice_SelectionChangeFcn(hObject, eventdata, handles)
    switch hObject 
    case handles.VCbutton
        set(findall(handles.CC, '-property', 'enable'), 'enable', 'off');
        set(findall(handles.GT, '-property', 'enable'), 'enable', 'off');
        set(findall(handles.VC, '-property', 'enable'), 'enable', 'on');
        set(handles.nbo,'enable','off');
        if get(handles.nboBox,'Value') == 1
            display('nboBox on')
            set(handles.nbo,'enable','on');
        else
            set(handles.nbo,'enable','off');
        end
        set(handles.nbo_drum,'enable','off');
        if get(handles.drumBox,'Value') == 1
            display('drumBox on')
            set(handles.nbo_drum,'enable','on');
        else
            set(handles.nbo_drum,'enable','off');
        end
    case handles.CCbutton
        set(findall(handles.CC, '-property', 'enable'), 'enable', 'on');
        set(findall(handles.GT, '-property', 'enable'), 'enable', 'off');
        set(findall(handles.VC, '-property', 'enable'), 'enable', 'off');
    case handles.GTbutton
        set(findall(handles.CC, '-property', 'enable'), 'enable', 'off');
        set(findall(handles.GT, '-property', 'enable'), 'enable', 'on');
        set(findall(handles.VC, '-property', 'enable'), 'enable', 'off');
end

[Geoff Hayes]

Sébastien - where is the line of code to enable the bleedoffBox?

[John-John]

I'm sorry, I should've said : "tag of the chek box: nboBox". My bad!

[Geoff Hayes]

If I copy and paste your code

 if get(handles.nboBox,'Value') == 1
    display('nboBox on')
    set(handles.nbo,'enable','on');
 else
    set(handles.nbo,'enable','off');
 end

into a simplified GUI, then the above works: if my checkbox is checked then the edit text control is enabled.

So - put a breakpoint at the line

 if get(handles.nboBox,'Value') == 1

and re-run your code. When the debugger pauses at this line, what happens next? Is the Value property of nboBox indeed 1? If not, then perhaps this means that the checkbox name/tag has gotten mixed up with one of the other two. Check the string value for this edit box with

 get(handles.nboBox,'String')

Is it 'bleed-off'?

[John-John]

I found the source of the problem. I put that part of the code inside an if...end in the SelectionChangeFcn of the radiobuttons. Don't ask why, that's what I did. Sorry for wasting your time (again) and thanks a lot for your time!