[Gambas-user] App idle with long loops

Jorge Carrión shordi at ...626...
Sun Oct 9 15:19:49 CEST 2016


It's an empty proyect, I'm afraid...
Thanks for the trying.

Regards

2016-10-09 14:36 GMT+02:00 Charlie Reinl <Karl.Reinl at ...9...>:

> Am Sonntag, den 09.10.2016, 12:56 +0200 schrieb Jorge Carrión:
> > Is there any example of task fork use? I have a proyect who sending
> massive
> > e-mails to our customers and I guess that task can be a good solution...
> >
> > Regards
> >
> > 2016-10-08 23:54 GMT+02:00 Demosthenes Koptsis <demosthenesk at ...626...>:
> >
> > > On 8/10/2016 19:09 μμ, Tobias Boege wrote:
> > > > On Sat, 08 Oct 2016, Demosthenes Koptsis wrote:
> > > >> Hello,
> > > >>
> > > >> i have very long (time consuming) For loops and my app is frozen
> until
> > > >> loop is finished.
> > > >>
> > > >> for example i wget urls with a custom Sub which
> Shell("wgetURLS.sh") To
> > > >> sOUTPUT
> > > >>
> > > >>     'get urls
> > > >>     For i = 0 To iDepth
> > > >>       wgetURLS(i * 10)
> > > >>     Next
> > > >>
> > > >> Public Sub wgetURLS(iStart As Integer)
> > > >> .....
> > > >>
> > > >> Shell("wgetURLS.sh") To sOUTPUT
> > > >>
> > > >> .....
> > > >>
> > > >> --------------
> > > >>
> > > >> Is there possible to set the gui idle and the same time run
> For...loops?
> > > >>
> > > > If you only want to refresh the GUI (e.g. if your For loops update a
> > > > ProgressBar on your form and you want to update the value of that bar
> > > > during the loop), then Wait [1] is sufficient.
> > > >
> > > > If you want the GUI to be fully operatable while your loops run in
> the
> > > > background, you have to use a background Task [2]. As Gambas is
> single-
> > > > threaded, Tasks are implemented as external processes which execute
> one
> > > > of your classes. This limits the things you can do with Tasks (you
> cannot
> > > > directly modify the main program, for example, but have to send data
> and
> > > > status reports through a pipe from your Task to the main process and
> > > > interpret them there). However, if all you want is loading some
> files via
> > > > wget, that should not be a problem.
> > > >
> > > > Of course, there is also the gb.net.curl component which can download
> > > files
> > > > asynchronously. If you can use that (which depends on what you want
> to
> > > do),
> > > > you should.
> > > >
> > > > And as a fourth option, looking further into your code: if you want
> to
> > > > execute shell scripts in a For loop, then don't use the Shell-To
> syntax
> > > > but create a Process object instead and accumulate its output in Read
> > > > events. The event loop will take care of everything and the GUI will
> be
> > > > usable without any extra effort on your side.
> > > >
> > > > Finding the best solution depends, who would have thought, on what
> you
> > > want
> > > > to do *specifically*. Tasks are the most general and most cumbersome
> > > option.
> > > >
> > > > Regards,
> > > > Tobi
> > > >
> > > > [1] http://gambaswiki.org/wiki/lang/wait
> > > > [2] http://gambaswiki.org/wiki/comp/gb/task
> > > >
> > > Thanks very much for the details.
> > >
> > > Regards,
> > >
> > > Dim
> > >
> > >
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>
> Salut
>
> I once found this one :
> http://gambas.8142.n7.nabble.com/attachment/17635/0/TaskTest.zip
>
> It still exists, but don't remember if it worked.
>
>
> --
> Amicalement
> Charlie
>
>
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