Re: Widget returning NULL?

[Steve & Patti Getzinger <psatg bluemarble net>]

Harring Figueiredo wrote:

> With this information is impossible to know what you are doing wrong -- or
> trying to do.
> Please, if possible, send a code snip to the list.
>
> Harring.
> --- Steve & Patti Getzinger <psatg bluemarble net> wrote:
>  
>
> > I am at a loss here. I have 3 entries I am testing in a func and two of 
> > them are NULL:
> >
> > if(entry2==NULL)
> >
> > How does it end up NULL and how do I unnulify it? I wish to test on text 
> > length but can not get past this NULL issue. The second and third come 
> > back NULL and the first always comes back not NULL using the above test 
> > regardless of data entered.
> >
> > TIA,
> > Steve
> >
> > _______________________________________________
> > gtk-app-devel-list mailing list
> > gtk-app-devel-list gnome org
> > http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
> >    
>
>
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>  
Here is how they are defined.

 GtkWidget *entry20;
 GtkWidget *entry22;
 GtkWidget *entry23;

Here is the portion that builds them.

 entry20 = gtk_entry_new ();
 gtk_widget_show (entry20);
 gtk_table_attach (GTK_TABLE (table2), entry20, 2, 3, 1, 2,
                   (GtkAttachOptions) (GTK_EXPAND | GTK_FILL),
                   (GtkAttachOptions) (0), 0, 0);
 gtk_widget_set_usize (entry20, 208, 24);

 entry22 = gtk_entry_new ();
 gtk_widget_show (entry22);
 gtk_table_attach (GTK_TABLE (table3), entry22, 1, 2, 1, 2,
                   (GtkAttachOptions) (GTK_EXPAND | GTK_FILL),
                   (GtkAttachOptions) (0), 0, 0);

 entry23 = gtk_entry_new ();
 gtk_widget_show (entry23);
 gtk_table_attach (GTK_TABLE (table3), entry23, 1, 2, 2, 3,
                   (GtkAttachOptions) (GTK_EXPAND | GTK_FILL),
                   (GtkAttachOptions) (0), 0, 0);
 gtk_entry_set_visibility (GTK_ENTRY (entry23), FALSE);

Signal Connects

gtk_signal_connect (GTK_OBJECT (entry20), "changed",
                     GTK_SIGNAL_FUNC (on_entry20_changed),
                     NULL);
 gtk_signal_connect (GTK_OBJECT (entry22), "changed",
                     GTK_SIGNAL_FUNC (on_entry20_changed),
                     NULL);
 gtk_signal_connect (GTK_OBJECT (entry23), "changed",
                     GTK_SIGNAL_FUNC (on_entry20_changed),
                     NULL);

Callback

void
on_entry20_changed                (GtkEditable     *editable,
                                       gpointer         user_data)
{
 if(entry20 == NULL)
   {
       g_warning("entry20 is NULL");
   }else{
       g_warning("entry20 is not NULL");
  }
  if(entry22 == NULL)
   {
       g_warning("entry22 is NULL");
   }else{
       g_warning("entry22 is not NULL");
   }
 if(entry23 == NULL)
   {
       g_warning("entry23 is NULL");
   }else{
       g_warning("entry23 is not NULL");
   }

/*
if(strlen(gtk_editable_get_chars(GTK_EDITABLE(entry20),0,-1)) > 6)
               {
                 gtk_widget_set_sensitive (button19, TRUE);
   }else{
               gtk_widget_set_sensitive (button19, FALSE);
        }
*/
}

The vars used are global. The commented out if is what I want to do but 
test all three entries for sensitivity. Works fine if I am only testing 
entry20 but as soon as I try to add another it fails to operate as 
expected. I put in the test for NULL and entry22 and 23 always return NULL.

TIA
Steve