Re: emitting a signal (deleting a window)

[Richard Gipps <rgipps netspace net au>]

Thanks for your reply Gus.  I have made sure that the on_File_Exit_activate 
() gets
called when I select the menu item.  I checked this by calling 
gtk_signal_emit_by_name() with "destroy" which worked fine.  It is only 
when I try the "delete_event" I have problems!?  I will try your code 
instead - thanks for including that.

Richard.

At 22:27 04/02/04, you wrote:
> Richard Gipps wrote:
>
> > I am having trouble making an application close when I use my
> > File->Exit menu.  I have a File Exit signal handler:
> >
> > void on_File_Exit_activate(GtkMenuItem* menuitem,GtkWidget* Main_wnd)
> > {
> >       gtk_signal_emit_by_name(GTK_OBJECT(Main_wnd),
> >                               "delete_event");
> > }
> >
> > which I thought would 'send' a delete_event to the main Window which
> > has the following signal handlers:
> >
> > gboolean on_Event_Delete(GtkWidget* widget,GdkEvent* event,gpointer
> > user_data){
> >       if(is_object_created == TRUE) //free memory allocated for the
> >       CAD object      (*object_delete_func_ptr)(network);
> >       return(FALSE); //do not prevent window from being closed
> >       (destroyed)}
> >
> > void on_Event_Destroy(GtkWidget* widget,GdkEvent* event,gpointer
> > user_data){
> >       gtk_main_quit();
> > }
> >
> > This works correctly for the delete_event which is emitted when I
> > press the X in the corner of the window, but not using the File->Exit
> > menu.  Any help would be much appreciated.
>
> I use a different approach. I wrote an own function to delete any
> window. It's apparently a bit more low level so presumably slightly
> faster. My function not only accepts a GtkWindow but any widget within
> the window to be closed. It'll determine the associated window by
> itself. You could use this function instead of your
> gtk_signal_emit_by_name () call and hopefully it should work.
>
> I assume you have made sure that your on_File_Exit_activate () gets
> called at all when you select the menu item?
>
> void window_send_delete_event (GtkWidget *widget) {
>  GtkWindow *window;
>  GdkEvent   event;
>
>     g_assert (widget);
>     while (widget->parent) {
>         widget = widget->parent; }
>     window = (GtkWindow *) widget;
> //    g_log (LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
> //            "Sending delete event to window %s",
> //            gtk_widget_get_name ((GtkWidget *) window));
>     memset (&event, 0, sizeof (GdkEvent));
>     event.any.type = GDK_DELETE;
>     event.any.send_event = TRUE;
>     event.any.window = ((GtkWidget *) window)->window;
>     gtk_main_do_event (&event);
> }
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