Re: [gtkmm] Gtk::Main::runOneRound() or Gtk::Main::run() hook

[joey yandle <jwy divisionbyzero com>]

> Hello,
> 

Hello.

> Is there a way to run a gtkmm-2 application through an external main
> loop? Specifically, I want to have my own main loop and then call
> explicitly a Gtk::Main::runOneRound() function for each iteration;
> for example:
> 

Gtk::Main::iteration() will run the main loop once.  It's a static function,
and takes an optional arg on whether or not to block until there are 
events pending (default is true).

You can also use a loop like

  while(Gtk::Main::events_pending()) {
    Gtk::Main::iteration();
  }

to handle all current events without unnecessarily blocking.

>
> or as an alternative is there a way to register a callback function,
> so that it can be run from the Gtk main loop in each iteration ?, so
> I can do:
>         Gtk::Main::runHook(&remoteDevice::MainLoopOneRound);
>         Gtk::Main::run();
> 

You can use the Glib::signal_idle().  It runs whenever gtk+ isn't busy
doing anything.  I don't think it runs every loop, but I haven't actually
checked the glib source to confirm this.

You would invoke it as such:

  Glib::signal_idle().connect(SigC::slot(&RemoteDevice::MainLoopOneRound));

or if you need to pass a RemoteDevice object:
  
  Glib::signal_idle().connect(SigC::slot(rmtDev, &RemoteDevice::MainLoopOneRound));

cheers,
--
joey yandle