MATLAB: Callback in push button doesn’t work

callbackguiguide

Hey I have a simple if function that I want to start with a GUI pushbutton. It only works when I put uiwait before the if (local function) and the uiresume in in the callback function. In debug mode it works without it. How can I preclude using uiwait?
Matlab function
run GUI.m
global start
while true
uiwait;
if start
...
end
end
My GUI pushbutton callback function:
% --- Executes on button press in pushbuttonstart.
function pushbuttonstart_Callback(hObject, eventdata, handles)
% hObject    handle to pushbuttonstart (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
 global start
 start=true;
 uiresume;

Best Answer

Seems like drawnow did the trick.
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