how to interconnect different handles in GUi

I have 3 text box in GUi. Basically, user needs to input a value in Box#1, Box#2 and Box#3 will do the calculation.

    function edit1_Callback(hObject, eventdata, handles)
    A = get(handles.edit1,'String');
    B = str2num(A);
    C=2+B;
    set(handles.edit2,'String',num2str(C));

    function edit3_Callback(hObject, eventdata, handles)
    D = C+3.5;
    set(handles.edit2,'String',num2str(D));

My question is how can we read a variable from another callback function if we do not set 'C' as handles in 'edit2'? In other word, I do not want to have Box2.

Thanks.

Answer 1

[Walter Roberson]

You cannot read a variable from another callback function unless you have stored the value of the variable somewhere.

Perhaps you want

    function edit3_Callback(hObject, eventdata, handles)
    A = get(handles.edit1,'String');
    B = str2num(A);
    C = 2 + B;
    D = C + 3.5;
    set(handles.edit3,'String',num2str(D));

[PF]

Hi thanks for your help.

May I know another solution of storing the variable somewhere and allow callback from another function?

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.3F