loop while in a GUI stopped by callback

hello everybody, I'm french so excuse me for my english. I'm doing a GUI and I want to do a loop while which has to stop when a checkbox called TR is checked :

while (get(handles.TR,'Value'))
  .
  .
  .
end

But in the loop, matlab don't receive the callback and the value of the checkbox is not changed I don't know how I have to do....

thank you for your help

Answer 1

[Fangjun Jiang]

The computer will be running the while loop and be too busy to process your click on the checkbox. Add a pause(1) line in the while loop might help.

Answer 2

[trajik]

No no I want to stop it when the Value is 0. the problem is that there is no change, I've do :

while (get(handles.TR,'Value'))
    get(handles.TR,'Value') % without ; to see the answer
end

and even when I click on the checkbok the answer is always 1

Answer 3

[Jan]

MATLAB processes events as mouse clicks when the program returns to the command line, a DRAWNOW or PAUSE command. While PAUSE wastes some time (except for PAUSE(0)...), DRAWNOW is the best choice:

while (get(handles.TR,'Value'))
  .
  .
  drawnow;
end

Answer 4

[trajik]

I've tested whit drawnow, and I think that it stop the loop whatever the while's condition and the mousse click(it's not a problem),it's right??

[Fangjun Jiang]

I made a quick test. Both pause() and drawnow() works. drawnow() is a better choice. Hope you understand the underline cause now.