[Octave-bug-tracker] [bug #56470] Open figures do not raise closing event when [X] is pressed

[Deyan]

Follow-up Comment #5, bug #56470 (project octave):

The only place I need to update this is drawCurvDFT
<https://github.com/dvdvideo1234/MP3Toolbox/blob/master/functions/player/drawCurvDFT.m>
and drawSurfDFT
<https://github.com/dvdvideo1234/MP3Toolbox/blob/master/functions/player/drawSurfDFT.m>

drawnow:
When the loop is not broken I added drawnow after the last grid draw for the
system to update the event if the figure is closed. When the X is pressed the
figure closes correctly as like pause(0.1). Probably the performance issue
that drawnow draws a frame in a second is of the fact that I am running my
program on a laptop rather than a desktop.

pause:
This mode is working identically as drawnow, but I am gonna use drawnow as a
standard solution to avoid slowing loops in the figure update routine.

I think that for the refresh in one second there is nothing more to be done
now. My home desktop machine is more powerful than my laptop, so I think it's
normal.

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