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How do I get a script to wait until a figure is closed?

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John Hackett
John Hackett on 10 Mar 2018
Commented: Walter Roberson on 10 Mar 2018
So basically I have a gui, with a button press. On button press it runs a script that has a startBackground command in it. But before the figure from the script can even pop up, I get an error stating that a session was closed while it was running. However, I want the script to run until the user closes the figure. Basically it is a live figure, showing live inputed data during a certain range.
How do I do this?
After I run the script I can extend the time the script is running by putting a pause command, but I want the script to continue for an indeterminate amount of time, basically until the user closes it.

  3 Comments

per isakson
per isakson on 10 Mar 2018
Search help on uiwait, Block program execution and wait to resume
John Hackett
John Hackett on 10 Mar 2018
Thanks, uiwait was exactly what I needed, no clue why google didn't return something like that.

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Answers (1)

Ahmet Cecen
Ahmet Cecen on 10 Mar 2018
uiwait will probably halt the execution completely. I think you want the program to keep running until the figure is closed instead.
I am not entirely sure yet as I am not in front of a computer, but I believe you can do this instead:
f = imagesc; %Some Figure
while size(findobj(f))>0
'me' %some action
pause %some input
end
So if at any point the user closes the figure, your routine will break out of the while loop after the current iteration executes.

  2 Comments

per isakson
per isakson on 10 Mar 2018
Invoke this line and close the figure interactively
>> h = figure; uiwait(h); disp('figure closed')
Ahmet Cecen
Ahmet Cecen on 10 Mar 2018
Ok can check things now. If I did this:
k = figure;
uiwait(k)
'me' %some action
pause %some input
'me' doesn't get printed until the figure is closed. My impression from above from reference to a "live" figure is that he wants to program to run and update the figure "as long as" the figure is open, like plotting the reading from a sensor while figure is present. Unless I am making a mistake somewhere uiwait is instead choking the execution, so the figure will not update.
Where as this:
k = figure; %Some Figure
while size(findobj(k))>0
'me' %some action
pause %some input
end
makes it so that while the figure is open, you can keep pressing stuff and "me" will keep printing, so the program is still running and the loop is iterating.
Will leave it to the poster to choose the snippet that he intended to ask for. Apparently he meant to choke the execution instead.

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