Re: cancel gtk_main_quit and return to the main window

[muppet <scott asofyet org>]

On Jan 22, 2009, at 5:44 PM, Emanoil Kotsev wrote:

> the problem is, as far as I understand it, that I create a gtk  
> obejct from
> glade. when I hit the [x] button on the window  
> (window1::gtk_main_quit )
> the gtk widget ($Gtk2->{Gtk2Main}) related to this window seems to  
> die. I
> want to cancel it so I call a function quit which returns true if  
> data is
> saved and false if data is modified but not stored.
> Doesn't really matter, but when it receives false from quit() and I  
> call
> show an empty gray window appears.

You have the return value's meaning backwards.

http://library.gnome.org/devel/gtk/stable/GtkWidget.html#GtkWidget-delete-event

"Returns: TRUE to stop other handlers from being invoked for the  
event. FALSE to propagate the event further."

But your code was

> sub window1::gtk_main_quit  {
>        # TODO: recreate the SaveAllWindow on destroy
>  if ( ! quit() ) {
>        $Gtk2->{MainWindow}->show();
>        $Gtk2->{SaveAllWindow}->hide();
>        return FALSE;
>  } else {
>    Gtk2->main_quit();
>    return TRUE;
>  }
> }


Which says, if we don't want to quit, show the main window, hide the  
saveall window, and propagate to the default handler which will  
destroy the window.  Else, kill the main loop and inhibit destruction  
of the window.

We recently added some constants intended to disambiguate this kind of  
stuff.  So, you should rework that as

sub window1::gtk_main_quit  {
        # TODO: recreate the SaveAllWindow on destroy
        if ( ! quit() ) {
                $Gtk2->{MainWindow}->show();
                $Gtk2->{SaveAllWindow}->hide();
                return Gtk2::EVENT_STOP;  # true
        } else {
                Gtk2->main_quit();
                return Gtk2::EVENT_PROPAGATE; # false
        }
}

and it ought to work as you wanted.


> Basically I was thinking to recreate the window (using destroy and  
> new), but
> destroying the first window/gtk object it destroys also the notebook  
> as
> being part of the widget (window1), so I was thinking to put the  
> notebook
> into a separate widget and pack it into the window

That doesn't really work with stuff created by glade.  Once you  
destroy it, you must reload it from the xml file.  So, people  
typically just hide their glade-created windows instead of destroying  
them.



--
I hate to break it to you, but magic data pixies don't exist.
  -- Simon Cozens