Woo-Sick Choi <[EMAIL PROTECTED]> writes:
> Hi all~
>
> Examaple 1)
>
> gtk_signal_connect(GTK_OBJECT(clist), "select_row",
> GTK_SIGNAL_FUNC(selection_made),
> NULL);
>
> void selection_made( GtkWidget *clist,
> gint row,
> gint column,
> GdkEventButton *event,
> gpointer data )
> {
> .
> .
> }
>
> selection_made function have 5 arguments.
> but gtk_signal_connect function's last arguments is NULL.
The number of arguments depends on what signal it is ("clicked" or
"select_row").
In gtk/gtkclist.h:
struct _GtkCListClass
{
...
void (*select_row) (GtkCList *clist,
gint row,
gint column,
GdkEvent *event);
...
}
The 4 arguments are filled by the widget, the last 1 arguments are
provided by user (the last argument of gtk_signal_connect()).
The same rule applies to your second example.
--
Changwoo Ryu
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