colored status indicator in GUI

i'm trying to crate a text box that changes color if Mat lab is connected to arduino controller.

using the following code, it does not work:

function text3_CreateFcn(hObject, eventdata, handles)
% hObject    handle to text3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called
%ADD THE CHECK FUNCTION HERE (as an if function)
global a;
if a.roundTrip(42)==1
set(hObject,'text3_CreateFcn','red');
else 
end 
% UIWAIT makes guiarduino wait for user response (see UIRESUME)
% uiwait(handles.figure1);

guidata(hObject, handles);

i could not find a simple solution to this problem. thanks!

veronica

Answer 1

[Jan]

When should the color change to red? The CreateFcn runs during the creation of the figure.

This cannot work:

set(hObject, 'text3_CreateFcn', 'red');

Look at the documentation of set again. This commands sets a pre-defined property of the text object, but "text3_CreateFcn" is no property. Perhaps you want:

set(hObject, 'BAckgroundColor', 'red');

But I'm in doubt that the CreateFcn is the correct place to do this.

[veronica bogu]

the color should change if adruino is working

a.roundTrip(42)==1

how can i change background color as part of if /else .?

thank you.