Re: How can I use g_signal_connect() to pass a gponiter parameter

["Tristan Van Berkom" <tvb gnome org>]

Go look again at the docs for the radio item's "activate" signal, are you
sure that the callback only takes one paramater ?

also, gpointer implies a void pointer, no need to cast (void **) pointer to
pointer, just (gpointer) will do instead of (gpointer *) (but your code will
still work without that change).

Cheers,
              -Tristan

On Fri, Aug 22, 2008 at 5:36 AM, learning_gtk
<learning_symbian hotmail com> wrote:
>
> I hope to use  g_signal_connect() to pass a gchar* parameter like this:
>
> gchar* radio1= "Radio1"; //it is global variable
> gchar* radio2= "Radio2";
> gchar* radio3= "Radio3";
>
> void item_radio_print1(gpointer* data)
> {
>        g_print("This is the radio %s\n", (gchar *)data);
> }
>
> g_signal_connect(G_OBJECT(item_radio1), "activate",
>                     GTK_SIGNAL_FUNC(item_radio_print1), (gpointer*)radio1);
> g_signal_connect(G_OBJECT(item_radio2), "activate",
>                     GTK_SIGNAL_FUNC(item_radio_print1), (gpointer*)radio2);
> g_signal_connect(G_OBJECT(item_radio3), "activate",
>                     GTK_SIGNAL_FUNC(item_radio_print1), (gpointer*)radio3);
>
> But, those strings can not be printed.
>
> Please help me. Thanks!
> --
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