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
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>>    
>>
>
>
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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