Re: typecasting -- GtkItemFactoryEntry->callback_action

[Havoc Pennington <hp redhat com>]

Russell Francis <frussell p1 cs ohiou edu> writes:
> I am using ItemFactory to build a menu system and it is working great, I
> just have a question about the "proper" way to do something?
>
> I wish for the activated menu item to call a function with a pointer
> as a variable not a guint like the ItemFactory structure wants.  
>
> void function(GtkWidget *widget, gpointer data);    NOT
> void function(GtkWidget *widget, guint data);
>
> The GtkItemFactoryEntry->callback_action is a guint so I have been
> typecasting a gpointer to guint when initializing the GtkItemFactoryEntry
> and then typecasting back to gpointer in the callback function.  This is
> working because (void *) and guint are the same size. I can't help but
> think there is a better [and less likly to break :-] way to do this. 

Yeah, casting pointer to uint is not portable.

You just want to keep a mapping from uint to pointer somewhere. Maybe
a hash table or array.

Havoc