Re: Exiting GTK main event loop from a plugin application

[Edward Catmur <ed catmur co uk>]

Before calling gtk_init(), save the X error handlers with
XSetErrorHandler(NULL), XSetIOErrorHandler(NULL); after you're finished,
restore them. Thus:

void my_plugin() {
        int (*old_handler) (Display *, XErrorEvent *) = XSetErrorHandler
(NULL);
        int (*old_io_handler) (Display *, XErrorEvent *) = XSetIOErrorHandler
(NULL);
        
        gtk_init (NULL, NULL);
        // do stuff

        XSetErrorHandler (old_handler);
        XSetIOErrorHandler (old_io_handler);
}


Ed


On Fri, 2006-08-11 at 20:51 -0700, Kevin Arthur wrote:
> To answer my own question: I solved it by calling gdk_error_trap_push() to
> trap the X error.  Probably not the most elegant solution but it seems to
> work.
>
> On 8/10/06, Kevin Arthur <kwarthur gmail com> wrote:
> > I'm having a fairly basic main loop/event problem in a GTK+ application.
> > I'm sure this is a dumb beginner FAQ, but haven't had any luck finding an
> > answer in the documentation.
> >
> > I'm on linux, using gtk-2.0, developing code that runs as a plugin within
> > another program (which is not using gtk).  My plugin needs to bring up a gtk
> > modal dialog and then destroy it and quit the gtk loop when the user hits
> > cancel or whatever.  I'm apparently not exiting the gtk loop properly
> > because I get an X error and crash the next time the host application
> > creates a window.
> >
> > My main function does a gtk_init() and gtk_main().  The ok/cancel
> > callbacks call gtk_widget_destroy() and gtk_main_quit().  This is based on
> > example code in the API docs.
> >
> > The X error is
> >
> > BadClass, invalid event class
> > (Details: serial 1337 error_code 174 request_code 149 minor_code 6)
> >
> > Do I need to do something to unregister for events?  Should I be using
> > g_main_loop() instead of gtk_main()?  I've tried adding things like this
> > before calling gtk_main_quit() but get the same result:
> >
> >
> > while (gtk_events_pending())
> > gtk_main_iteration();
> >
> > Thanks for any advice.
> > Kevin
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