Visibility Event Confusion

[gouldtj RoseVC Rose-Hulman Edu]

Okay, I am trying to get all of the information that is located in a
GdkEvent structure when my window gets a visibility event.  I am getting
the visiblity event, but I can't find the data that I need.

The feild that I need in the struct GdkEventVisibility is the
GdkVisibilityState.  I think that I understand that the event is going
to my gtk_main loop and it goes down to the object level and
then calling my handler using gtk_BOOL__POINTER().  Which to me
means that I will be getting some sort of pointer to my function
besides my data and the widget, that is cool.

When I lough the code it looks like the data that is going in
there is the first GtkArg array, which is built in
gtk_signal_emit(), which I don't understand.  From what I can tell from
a GtkArg structure is that it can only have standard data types, and not
something like a GdkEventVisiblity.  So that is confusing.  So I went
into GDB to look at what I am getting passed  function, and here
is what I got:

Breakpoint 1, fl_onscreen_vis_change (widget=0x80ab3c8, args=0x80a8c68, 
a=0x0) at onscreen.c:99
99              printf("fl_onscreen_viz_change\n") bt
#0  fl_onscreen_vis_change (widget=0x80ab3c8, args=0x80a8c68, data=0 at
onscreen.c:99
#1  0x401ded69 in gtk_marshal_BOOL__POINTER ()
#2  0x4020cbed in gtk_handlers_run ()
#3  0x4020c032 in gtk_signal_real_emit ()
#4  0x4020a185 in gtk_signal_emit ()
#5  0x4023f75c in gtk_widget_event ()
#6  0ba in gtk_main_do_event ()
#7  0x402895cb in gdk_event_dispatch ()
#8  0x6 in g_main_dispatch ()
#9  0x403a41a1 in g_main_iterate ()
#10 0x403a4341main_run ()
#11 0x401dd859 in gtk_main ()
#12 0x804abe5 in main ()
#13 0x403eecb3 in start_main (main=0x804a9d0 <main>, argc=1, 
    argv=0xbffffc14, init=0x8<_init>, fini=0x804cbcc <_fini>, 
    rtld_fini=0x4000a350 <_dl_fini>, st=0xbffffc0c)
    at ../sysdeps/generic/libc-start.c:78
(gdb) display *args
1: *args = {type = 29, name = 0x80ab460 "\n\b6*@1", d = {
    char_dat\000', uchar_data = 0 '\000', bool_data = 655360, 
    int_data = 655360,ata = 655360, long_data = 655360, 
    ulong_data = 655360, float_data = 962e-40, 
    double_data = 3.2379086165851934e-318, 
    string_data = 0<Address 0xa0000 out of bounds>, 
    pointer_data = 0xa0000, object_data 000, signal_data = {f =
0xa0000, 
      d = 0x0}, args_data = {n_args = 655360, args = 0x0}, callback_data
= {
      marshal = 0xa0000, data = 0x0, notify = 0xc8}, c_callback_data = {
      func = 0xa0000, func_data = 0x0}, foreign_data = {data = 0xa0000, 
      notify = 0}}}
(gdb)

It looks to me from this that I am infact nong a GtkArg passed
into my function, but I don't know what I have then...

The only value that makes sense (and I get consistantly) is the type =
29, which doesn't look like an GtkArg type, and doesn't look like a
GdkVisibiltyState type, so I don't know what type it could be.

So, thank you for your help.  All I really want is the
GdkVisibiltyState, if there itter way to get that please tell me,
I could be going about this all wrong.

             Thanx in advance,
			Ted