Extra callback parameters

[Russell Shaw <rjshaw iprimus com au>]

Hi,
I have a callback that is passed one user data item (cdata):

void colour_cb(GtkButton *button, gpointer data)
{...
}

g_signal_connect(G_OBJECT(colbutton),"clicked",G_CALLBACK(colour_cb),cdata);


Is it possible to modify g_object signals so that more than
one data parameter can be passed like:

void colour_cb(GtkButton *button, gpointer data1, gpointer data2)
{...
}

g_signal_connect(G_OBJECT(colbutton),"clicked",G_CALLBACK(colour_cb),cdata1,cdata2);