Re: passing #define'd value to callback

[Peter Wurmsdobler <peter wurmsdobler ctm-france com>]

Darin,

> Have the integer itself masquerade as a pointer, using the glib macros, like
> this (I tried to imitate your formatting):
> void mm_spin_radiobutton_clicked( GtkButton *button, gpointer data ) {
>     if ( GTK_TOGGLE_BUTTON(button)->active )
>         do_something(GPOINTER_TO_INT(data));
> }
>     gtk_signal_connect(
>         GTK_OBJECT( mm_on_radiobutton ), "clicked",
>     GTK_SIGNAL_FUNC( mm_state_radiobutton_clicked ),
>         GINT_TO_POINTER(ON) );

This was my first attempt before posting the question,
but the result was a segmentation fault, maybe because
GINT_TO_POINTER() is nothing but (gpointer) which is
again (void *). Using this for 0 results in (void *)0
which is NULL. However I would like 0 and 1 because
I can directly use the values rather than strings.

peterw
-- 
Dr. Peter Wurmsdobler

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