Preventing parallel GUI functions from overrunning matlab
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Hello! I've run into a brick wall, and I believe that it's because I don't understand how matlab handles parallel functions.
First of all, lets say that I have a GUI with a single button in the middle
figure1 = figure; button1 = uicontrol('style','pushbutton','position',[.5 .5 .5 .5]);
And lets say that this button's callback function opens up a new figure to say, change the color of the figure background with another function that I've written.
set(button1,'callback',@changeBkgrdColor)
Now, if the user clicks on the button again without ending the changebkgrdColor function, it'll open up a second instance of my changeBkgrdColor function.
If you're looking to crash matlab, you can open up about 30 parallel functions and from that point, no more functions will open, matlab freaks, and the only way to fix it is to ctrl+c on the command line or end matlab's process.
Is there a way to break out of a function with something like a handle reference?
采纳的回答
Joseph Cheng
2014-6-9
Well what you can do to stop this from happening is to deactivate the pushbutton until the the function is completed.
function testing()
myvar = 5;
figure
uicontrol('Style','pushbutton','String','new','Callback',{@pushbutton_callback,myvar});
end
function pushbutton_callback(hObject,eventdata,x)
set(hObject,'Enable','off')
figure,plot(rand(x));
pause(10)
set(hObject,'Enable','on')
end
http://www.mathworks.com/matlabcentral/newsreader/view_thread/246447 speaks to what you are trying to do look for in the breaking out of a running function. I do not think it can readily be done.
http://www.mathworks.com/matlabcentral/newsreader/view_thread/286204 does mention something but it all depends on your implementations
2 个评论
Charles Miller
2014-6-10
编辑：Charles Miller
2014-6-10
Joseph Cheng
2014-6-13
In that case, you could at the beginning of the function have a FLAG check to see if it should run again or not. However i do not exactly know if you can get that flag updated while another instance of the function is being run such that the second instance has an update. When i get the chance i'll run a test and get back to you.
更多回答（1 个）
per isakson
2014-6-9
编辑：per isakson
2014-6-10
Interruptible
{on} | off
Callback routine interruption mode. Controls whether a object
callback function can be interrupted by subsequently invoked
callbacks.
.
In response to comments:
.
Try
uicontrol( 'Callback', 'interrupt_test' ...
, 'Interruptible', 'off' ...
, 'BusyAction', 'queue' )
and
uicontrol( 'Callback', 'interrupt_test' ...
, 'Interruptible', 'off' ...
, 'BusyAction', 'cancel' )
where
function interrupt_test
fprintf('responding at: %s\n', datestr( now, 'MM:SS.FFF') )
pause( 2 )
end
3 个评论
Charles Miller
2014-6-10
Charles Miller
2014-6-10
per isakson
2014-6-10
编辑：per isakson
2014-6-10
"which might be the problem" . What problem do you refer to?
I added an example to my answer
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