Re: Widget returning NULL?

[Brett Nash <nash nash nu>]

> Here is the portion that builds them.

NFI what causes the problem - there must be something else going on else
where trashing them or something.  However as an easy solution - why not
pass them as the data on the callback?

> Signal Connects
>
> gtk_signal_connect (GTK_OBJECT (entry20), "changed",
>                      GTK_SIGNAL_FUNC (on_entry20_changed),
>                      NULL);

Changes to: (note last arg)

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

And then in the callback do something like:

> void
> on_entry20_changed                (GtkEditable     *editable,
>                                        gpointer         user_data)
> {
        GtkWidget *entry;

        if (user_data == NULL){
                g_warning("userdata is not a widget\n");
                return;
        }

        entry = GTK_WIDGET(user_data);
        
        if(strlen(gtk_editable_get_chars(GTK_EDITABLE(entry),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.

Logically there is nothing wrong with that code - it must be somewhere
else that is stomping on the variables.  NFI what. 

If you need all three entrys, create a struct or an array and pass that
as the callback data.

        Regards,
        nash
-- 
Brett Nash <nash nash nu>
Sometimes it's better to light a flamethrower than curse the darkness.