Re: advice needed for spinner

[Brian Manning <cpan xaoc org>]

Hi,

In the script 'spinner_fork_for_question.pl', you're still calling
Parallel::ForkManager->wait_all_children, which I stated in my
previous e-mail is a blocking call.  Are you going to remove that
method call at some point?

Also, can you simplify 'spinner_fork_for_question.pl'?  You could
remove the e-mail sending bits, and replace it instead with a call to
qx(sleep), or some other external process that will block for a few
seconds, and most likely get the same result.

The script "gtk3_spinner_fork2.pl" worked for me.

Thanks,

Brian

On Wed, May 28, 2014 at 10:00 PM, tsuyoshi okita <825864 gmail com> wrote:
> Dear Brian and others,
>
> Thank you for your quick reply, Brian-san.
> Instead of forking two process, I've decided to fork only one process for
> sending an email,and using run_on_start and run_on_finish for the spinner.
> And the same problem still persists. Strange thing is that I added print
> "run_on_start" and print "run_on_finish" to each callback subroutines to
> make sure they are processed.  They do, but spinners do not respond right.
>
> In other code using Parallel::ForkManager, Spinner worked fine, it spin and
> stopped when I expected. but when forked to send an email, spinner gets
> grumpy all the sudden.
> I attached two test cases, one is a revised but problem still persists code,
> and other works sort of fine.
>
> There is other problem I need your guide for.  when I add hide() for spinner
> after stop(), spinner does not show at all.  Have you had this problem??
>
> Thank you again.
>
> Tsuyoshi
>
>
> On 2014年05月29日 12:04, Brian Manning wrote:
> > Your sample code uses Parallel::ForkManager, and uses the
> > wait_all_children method to wait for the children to end processing.
> >  From the Parallel::ForkManager docs:
> >
> > -begin quote-
> >
> > wait_all_children
> >
> > You can call this method to wait for all the processes which have been
> > forked. This is a blocking wait.
> >
> > -end quote-
> >
> > So you are calling a method that says it will block, hence your demo
> > script is blocking.
> >
> > Instead of using "wait_all_children" (which blocks), I would look at
> > using the "run_on_finish" callback method instead, and make the call
> > to stop the spinner from that callback method.
> >
> > Thanks,
> >
> > Brian
> >
> > On Wed, May 28, 2014 at 7:27 PM, tsuyoshi okita <825864 gmail com> wrote:
> > > Dear gurus,
> > >
> > > I've been trying let a spinner spins at the same time sending an email by
> > > forking and failing.  Although a program forks, and one child process
> > > suppose to spin the spinner while other sends email, the spinner does not
> > > spin until the email is completely sent.  How does you all usually handle
> > > this spinner thingy???  Am i on a right path??
> > >
> > > I attached my test case.  You need to add SMTP host name, your email
> > > address, and password.
> > >
> > > Thank you.
> > >
> > > Tsuyoshi
> > >
> > > _______________________________________________
> > > gtk-perl-list mailing list
> > > gtk-perl-list gnome org
> > > https://mail.gnome.org/mailman/listinfo/gtk-perl-list
>
>
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