loop while in a GUI stopped by callback

2011 8 17
4 个回答
6 次查看（30 天）

0 个投票

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

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回答（4 个）

Fangjun Jiang
Fangjun Jiang 2011-8-17

0 个投票

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.
trajik
trajik 2011-8-17

0 个投票

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
Jan
Jan 2011-8-17

0 个投票

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
trajik
trajik 2011-8-17

0 个投票

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??

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Fangjun Jiang
Fangjun Jiang 2011-8-17
I made a quick test. Both pause() and drawnow() works. drawnow() is a better choice. Hope you understand the underline cause now.

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trajik
trajik
2011-8-17

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