[Gambas-user] App idle with long loops

[Charlie Reinl]

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