Re: Mixed pixbuf and text

[Grant McLean <grant mclean net nz>]

On Fri, 2005-07-01 at 10:49 +0200, A. Pagaltzis wrote:
> * The Saltydog <thesaltydog gmail com> [2005-07-01 10:35]:
> > On 7/1/05, Jan Hudec <bulb ucw cz> wrote:
> > > Wow, that's complex! Simply running Gtk2->main_iteration
> > > while Gtk2->events_pending; between reading the lines is
> > > easier and does the job just as well.
> >
> > Yes, but I needed the user to be free to start using all
> > program features, even while the treeview is growing. So he can
> > open trees, doubleclick, use menu items and even stop the scan.
>
> You are programming by coincidence[1]. If you actually understood
> how Gtk2 works, you’d know that the loop Jan mentioned enables
> exactly the behaviour you want, and you could avoid a lot of
> complexity.

Well, I think I understand how Gtk2 works and I don't understand how
calling events pending and main_iteration helps at all.

Consider a typical sequence of statements to query a database:

  my $sth = $dbh->prepare($sql);
  my $rc  = $sth->execute(@args);
  while ( @row = $sth->fetchrow_array ) {
    print "@row\n";
  }

If we have a complex query that takes 2 minutes to execute, then 
the second line of code will take two minutes from when it begins 
executing to when the execute method returns.  

Sure, we can call main_iteration before calling execute and we 
can call it again after execute returns, but if execute takes 2 
minutes to return then out GUI will be unresponsive for 2 minutes.

Or am I missing something?

Regards
Grant