RE: dialog widget problem

["Dugas, Alan" <alan dugas analog com>]

Hmm...  It sounds like dialog_win might not be pointing to the widget you want
when you set tasks->dialog_win.  Use a debugger to check the value of dialog_win
to see if it's changing.  If you don't have a debugger available, insert
printf() statements to display the value of dialog_win after you create the
dialog window and again when you assign tasks->dialog_win = dialog_win, they
should be the same.  In addition to this, try using
gtk_widget_show(GTK_WIDGET(widget)) in ok_delete_handler(), it may also help
shed some light on the problem.  And lastly I think you may need to insert a
call to gtk_signal_emit_stop_by_name() in ok_delete_handler() to prevent the
default handler(s) from being run (see page195 of the GTK tutorial).  It could
be that a default handler is destroying your widget so that when you go to use
it later (i.e. "show" it) you get a segfault.



				-- Stupid Genius

> ----------
> From: 	Matt Eisemann[SMTP:meisemann dsrnet com]
> Sent: 	Tuesday, October 31, 2000 8:55 AM
> To: 	'Dugas, Alan'; gtk-list gnome org
> Subject: 	RE: dialog widget problem
> 
> Below should show my scoping of how I do everything.  It must be a scoping 
> issue.  Basically what I do is in two different functions I implement the 
> following code to display the dialog under a specific condition.
> 
> void some_func(void)
> {
>   ....
>   if(tasks->dead_tasks == TRUE)
>   {
>     gtk_widge_show_all(tasks->dialog_win);
>     tasks->dead_tasks = FALSE;
>   }
> }
> 
> The above is seen in two different functions.
> In main() I have the code
> 
> int main(int argc, char *argv[])
> {
>   dialog_win = gtk_dialog_new();
>   dialog_label = gtk_label_new("WARNING.  There are DEAD tasks running. ");
>   dialog_ok = gtk_button_new_with_label("OK");
>   gtk_window_set_title(GTK_WINDOW(dialog_win), "dead tasks");
>   gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog_win)->vbox),dialog_label,
>                                FALSE,FALSE,NO_PADDING);
>  
>  gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog_win)->action_area),dialog_ok,
>                                FALSE, FALSE,NO_PADDING);
>   /* later in main  this might be problem.  copy ptr of widget to point to 
> dialog_win.  Both are defined as GtkWidget *dialog_win.  */
>   tasks->dialog_win = dialog_win;
> 
>   /* callbacks then follow after the above */
> 
>   ....
>    gtk_signal_connect_object(GTK_OBJECT(dialog_ok),"clicked",
>  
>                                          GTK_SIGNAL_FUNC(gtk_widget_hide  
> ),GTK_OBJECT(dialog_win));
>   gtk_signal_connect(GTK_OBJECT(tasks->dialog_win),"delete_event",
>                               GTK_SIGNAL_FUNC(ok_delete_handler),NULL);
> 
>   }
> 
>   The above signal does not make a difference, I get a core dump whether I 
> use GTK_OBJECT(tasks->dialog_win) or GTK_OBJECT(dialog_win).  The 
> utics_ok_delete_handler function
> 
> gboolean ok_delete_handler(GtkWidget *widget, GdkEvent *event,
>                                                   gpointer user_data)
> {
>   char who[]="ok_delete_handler";
> 
>   printf("closing: %s \n",who);
>   gtk_widget_hide(widget);
>   return(TRUE);
> }
> 
> Hopefully the above should give the idea of the scoping I am using.  The 
> only problem I might see is the fact I make a copy of the ptr to the widget 
> but it should be displaying the same widget with just a different pointer 
> unless I am wrong.
> 
> 
> -----Original Message-----
> From:	Dugas, Alan [SMTP:alan dugas analog com]
> Sent:	Monday, October 30, 2000 6:51 PM
> To:	gtk-list gnome org; Matt Eisemann
> Subject:	RE: dialog widget problem
> 
> The code looks OK to me, however, you may be running into a scoping issue
> with dialog_win depending on where you use gtk_signal_connect(). 
>  Otherwise,
> I think I'd need to see more of your code to figure out what's going on.
> 
> 
> 
> 
> 				-- Stupid Genius
> > ----------
> > From: 	Matt Eisemann[SMTP:meisemann dsrnet com]
> > Sent: 	Monday, October 30, 2000 6:23 PM
> > To: 	'Dugas, Alan'; gtk-list gnome org
> > Subject: 	RE: dialog widget problem
> >
> > You were right.  For some reason it needed gtk_signal_connect_object.  If
> > I
> > want to also have a window delete handler in case they close the window
> > via
> > window mgr does the following look right given the variable names I have
> > used already.
> >
> > gtk_signal_connect(GTK_OBJECT(dialog_win),"delete_event",
> >
> >
> > GTK_SIGNAL_FUNC(utics_ok_delete_handler),NULL);
> >
> > gboolean utics_ok_delete_handler(GtkWidget *widget, GdkEvent *event,
> >                                                   gpointer user_data)
> > {
> >   gtk_widget_hide(widget);
> >   return(TRUE);
> > }
> >
> > Actually, i just tried it and I got a core dump.  Anything look wrong
> > above.  Thanks ahead of time for your help.
> >
> > Matt
> >
> >
> >
> > -----Original Message-----
> > From:	Dugas, Alan [SMTP:alan dugas analog com]
> > Sent:	Monday, October 30, 2000 5:58 PM
> > To:	gtk-list gnome org; Matt Eisemann
> > Subject:	RE: dialog widget problem
> >
> > Just a thought...  It appears the problem has to do with
> > gtk_signal_connect()
> > passing it's first argument to gtk_widget_hide() whereas I think your
> > trying to
> > pass the last argument instead.  Try using gtk_signal_connect_object(), 
> it
> >
> > will
> > change the order of the argments passed to the callback function so that
> > the
> > last argument to gtk_signal_connect_object() is passed as the first
> > argument to
> > gtk_widget_hide() instead.
> >
> >
> >
> > 				-- Stupid Genius
> >
> > > ----------
> > > From: 	Matt Eisemann[SMTP:meisemann dsrnet com]
> > > Sent: 	Monday, October 30, 2000 5:09 PM
> > > To: 	gtk-list gnome org
> > > Subject: 	dialog widget problem
> > >
> > > Currently I am creating an application, but there is something wrong
> > with
> > > the callback that hides the widget or something is wrong in my logic.
> >  Here
> > > is a bit of code below which so should give some idea of what I am
> > doing.
> > >  The main window calls a dialog box when a certain flag is set.  I want 
> > the
> > > user to be able to push the "OK" button and hide the dialog window and
> > > reset the flag back to FALSE.  I hopefully left out extraneous
> > information
> > > and code.
> > >
> > > void some_function(... )
> > > {
> > >
> > >   .....
> > >
> > >
> > >
> > >   if(tasks->dead_tasks == TRUE)
> > >   {
> > >     gtk_widget_show_all(tasks->dialog_win);
> > >     tasks->dead_tasks = FALSE;
> > >   }
> > > }
> > >
> > >
> > >
> > > int main(INT argc, CHAR *argv[])
> > > {
> > >   ...
> > >   dialog_win = gtk_dialog_new();
> > >   dialog_label = gtk_label_new("WARNING.  There is something wrong. 
>  ");
> > >   dialog_ok = gtk_button_new_with_label("OK");
> > >   gtk_window_set_title(GTK_WINDOW(dialog_win),"dead tasks");
> > >
> > > 
>  gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog_win)->vbox),dialog_label,F
> >
> > > ALSE,FALSE,NO_PADDING);
> > > 
>   gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog_win)->action_area),dialog
> >
> > > _ok, FALSE,FALSE, NO_PADDING);
> > >
> > >   gtk_signal_connect(GTK_OBJECT(dialog_ok),"clicked",
> > >
> > > 
>                               GTK_SIGNAL_FUNC(gtk_widget_hide),GTK_OBJEC
> >
> > > T(dialog_win));
> > >  }
> > >   The code works somewthat above but the problem is that the OK button
> > > disappears and not the whole window.
> > >
> > >
> > > _______________________________________________
> > > gtk-list mailing list
> > > gtk-list gnome org
> > > http://mail.gnome.org/mailman/listinfo/gtk-list
> > >
> >
> >
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> > 
>