How to focus on 'edit text' callback by WindowKeyPressFcn in GUIDE.

I have a gui that includes an 'edit text' callback (queryet_1).

function queryet_1_Callback(hObject, eventdata, handles)
% hObject    handle to queryet_1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of queryet_1 as text
%        str2double(get(hObject,'String')) returns contents of queryet_1 as a double   
input = get(hObject,'String');

To add a keyboard shortcut I use the following code.

function figure1_WindowKeyPressFcn(hObject, eventdata, handles)
% hObject    handle to figure1 (see GCBO)
% eventdata  structure with the following fields (see FIGURE)
%   Key: name of the key that was pressed, in lower case
%   Character: character interpretation of the key(s) that was pressed
%   Modifier: name(s) of the modifier key(s) (i.e., control, shift) pressed
% handles    structure with handles and user data (see GUIDATA)

k = eventdata.Key;

if strcmp(k,'f2')
        queryet_1_Callback(hObject, eventdata, handles)
end

However, it gives the following error, refering to the line “input = get(hObject,'String');”

 Error using hg.figure/get
 The name 'String' is not an accessible property for an instance of class 'figure'.

My questions is why WindowKeyPressFcn does not work for 'edit text' callback while it deos for others like 'bushbottun'?

Answer 1

[Geoff Hayes]

Ali - look at how you are calling queryet_1_Callback from within the figure1_WindowKeyPressFcn function

 if strcmp(k,'f2')
        queryet_1_Callback(hObject, eventdata, handles)
 end

In the above, hObject is the handle to figure1 and not the queryet_1 text box. hObject always refers to the handle to the "source" of the callback (so the control that the callback is assigned to). Instead, pass the handle to the queryet_1 as

 if strcmp(k,'f2')
        queryet_1_Callback(handles.queryet_1, eventdata, handles)
 end

Try the above and see what happens!

[Ali Y.]

 Geoff, thank you for the help.