Get button answer (Uicontrolled)

Hi everyone, I am stuck with a UIcontrolled button: I would like to have a while loop to stop after I press stop. My current code looks somewhat like this:

n = 15;
i = 1;
figure
tbn1 = uicontrol('Style', 'togglebutton', 'String', 'Stop','Min',0,'Max',1,...
        'Position', [20 20 40 20]);    
while i < 100
    A = struct('value',[]);
    A(1).value = magic(n);
    step = linspace(1,n,n);
    surf(step,step,A(1).value)
    title(i);
    pause(0.02)
    set(tbn1,'Callback',@fun1);
    drawnow;
    i = i+1;
    if tbn1 == 1
       break; 
    end
    if tbn1 == 0
        continue;
    end
end

function fun1(hObject,eventData)
  button_state = get(hObject,'Value');
end

thank you for your help!

Answer 1

[Jan]

n = 15;
i = 1;
figure
tbn1 = uicontrol('Style', 'togglebutton', 'String', 'Stop','Min',0,'Max',1,...
      'Position', [20 20 40 20]);  
while i < 100
  A.value = magic(n);
  step    = linspace(1,n,n);
  surf(step, step, A.value);
  title(i);
  pause(0.02);  % Is drawnow implicitely
  i = i + 1;
  if get(tbn1, 'Value') == 1    % Or in modern Matlab versions: tbn1.Value == 1
     break; 
  end
end

[Rafi egal]

Thank you!