How to remove UI windows after a bug

Hi all,

I have a script that creates a waiting UI bar for the time of the for loop:

wb = waitbar(0,'Name','My waitBar');

for t = 0:t_end
    do_stuff(t, other_stuff);
    waitbar(t / span(end), wb);
end

delete(wb); 

However, when I try some things in do_stuff, I sometimes (often) have errors. So the script stops, but the UI windows remain and is impossible to close.

I thought a try/catch thing, but is there an easier way to get rig of those ghost windows?

Answer 1

[Adam Danz]

I think it's a bad idea to automatically close the figure whenever there's an error since the figure may contain information that helps to diagnose the problem.

To close the figure manually, select the figure and then delete or force-close.

figure('CloseRequestFcn', [])
delete(gcf)
% or 
close(gcf,'force')

[Update]

To delete a stubborn ui figure, select it and use closereq.

uifigure('CloseRequestFcn',[])
closereq

[Thomas Barbier]

Thanks for your answer.

Well it's not a figure but a UI window:

Nothing can make it close right now. Neither the red cross or delete('wb')...

[Adam Danz]

I updated my answer. Use closereq() to show that UI figure who's boss.

[Adam Danz]

I'm a bit puzzled. Waitbar() produces a regular figure panel, not a UI figure. How is your waitbar a uifigure?

https://www.mathworks.com/help/matlab/ref/waitbar.html

[Thomas Barbier]

Sorry, surely the wrong name. For me, UI = everything that allows to interact with the user.

[Thomas Barbier]

closereq works like a charm. Thank sa lot :)

[Adam Danz]

Glad I could help.

There's nothing wrong with your interpretation of "UI Figure" since that's exactly what it implies - a user interface figure. However, matlab's function to create app designer figures is uifigure() which produces a different type of figure with different properties than figure(). Both can be used to create a user interface.