Re: passing data to Menu handler function

[Gustavo Joćo Alves Marques Carneiro <ee96090 fe up pt>]

On Tue, 26 Oct 1999, Carlos Pereira wrote:

> Dear all,
> Typically, the event_handler to pop up a menu looks like this:
> 
> static gint button_press_handler (GtkWidget *widget, GdkEvent *event)
> { .
>   gtk_menu_popup (menu, ...
>   .
> }
> 
> Now the question is, how can I pass data to this function (not talking of
> external variables of course)? When I try a function with three arguments
> static gint button_press (GtkWidget *widget, GdkEvent *event, gpointer data)
> I always get errors. In fact, all the examples I see use a signal_connect_object 
> function, where the object is the menu, which makes it difficult to pass a gpointer...
> 
	Sometimes it's useful to do a 'gtk_signal_connect_object', but you
probably want just 'gtk_signal_connect', in which case you can pass any
pointer as the 'data' argument to gtk_signal_connect. That pointer will be
passed to your callback function as its last argument.
	If you *have* to use 'gtk_signal_connect_object', then you cannot
pass any data pointers to the function. In that case, you should attach
data to the object the receives the event (the last GTK_OBJECT(..) in
'gtk_signal_connect_object'), with 'gtk_object_set_data'.

> Thanks for the help!
> 
> Carlos
> 
> 
> 

-- 
Gustavo J.A.M. Carneiro
World::Portugal::FEUP::DEEC::LEEC::TEC
[reinolinux.fe.up.pt/~ee96090]