Re: Mailbox/MailboxNodes

[Stuart Parmenter <pavlov netscape com>]

eek, you're right.  Mailbox's used to not be GtkObjects... uhm..  you
should be able to do  BALSA_IS_MAILBOX(node) to see if it is a mailbox
now which you couldn't do before, so ismbnode should be able to go away.

Knut Neumann wrote:
> 
> Am Mit, 08 Dez 1999 17:30:23 David Pickens Sie:
> > I haven't really done anything with this side of things, but I assume
> > you've looked at the struct for Mailbox:
> > struct _Mailbox
> > {
> >   GtkObject ojbect;
> >
> >   gboolean ismbnode; /* is also in MailboxNode... used to tell them apart
> > */
> >   MailboxType type;
> >   gchar *name;
> >   void *private;
> >   guint open_ref;
> > ...
> 
> > I have no idea whether anything's done with that boolean, but at least it
> > exists.  :)
> 
> Sure I had a look at it. But actually it seems, that ismbnode is never set at
> any point in the code, but when creating a new mailbox (=false) or a new
> mailboxnode (=true) (see misc.h in balsa/libbalsa on that). Now while reading
> the mailboxes from hd if a directory is detected (containing mbox'es) a mail
> box node is created from it and added to a nodelist, a mailbox is added via
> MailboxNode with its member mailbox set to the related mailbox.
> 
> Later from that nodelist a ctree is generated (balsa-mblist AFAIR) and either
> a mailbox is added or a mailboxnode. So in that function I pointed out in my
> last mail (..button_press_cb), I cant see any chance to determine wether its
> a mailbox or a node other than that a casting beetween a MailboxNode and a Mailbox
> would work, which seems to be not possible as the MailboxNode is defined as
> 
> struct _MailboxNode
>   {
>     gboolean ismbnode;
>     gchar *name;
>     Mailbox *mailbox;
>     gint IsDir;
>     gint expanded;
>   };
> 
> Though I do not know much about type casting, I would think that at least the basic
> structure has to be the same (which means that GtkObject would have to come later in
> member list of struct _Mailbox as well as MailboxType). On the other side I changed the
> member order for both to start with ismbnode which did not work as well - in the former
> case it worked at least sometimes, to detect type by ismbnode (which I guess is only by random)
> 
> -Knut
> 
> --------------------------------------------------------------------------------
> Knut Neumann                                     knut.neumann@uni-duesseldorf.de
> --------------------------------------------------------------------------------
> 
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