Re: Gtk Question

["Shawn T. Amundson" <amundson gimp org>]

Um, eek..  All our examples are wrong.

The correct function prototype for the delete_event callback is includes
a GdkEventAny*.  The following will get you past your problem:

gint windowSignalHandlerStub(GtkWidget *w, GdkEventAny *event, gpointer data)
{

  char *junk = (char *) data;

  printf("Received the following data: %s\n", junk);
  return TRUE;
}

The correct function prototype can be determined by looking (in this
case) at the GtkWidgetClass structure in gtk/gtkwidget.h.  Admittedly
this isn't the optimal place to be looking at for things this simple,
so we will have to fix our examples and the tutorial.  ;-)

-Shawn

On Wed, 27 May 1998, Achint Sandhu wrote:

> Hi,
> 
>         I am starting to use Gtk and seem to be running into a small
> problem.
> Other than the problem mentioned below, everything else I have tried
> seems to work fine. 
> 
>         Included is the code for a small "Hello World" type program. I
> am
> trying to pass data to the "callback" for the "delete_event" handler for
> a window and can't seem to get it to work. I have tried this with Gtk
> 1.0.3 on Solaris. I realise I am probably missing something obvious. Any
> help you could provide would be greatly appreciated...
> 
>         Anyway here is the code...
> 
> ---
> 
> #include <stdio.h>
> #include <string.h>
> #include <gtk/gtk.h>
> 
> gint windowSignalHandlerStub(GtkWidget *w, gpointer data) {
> 
>   char *junk = (char *) data;
> 
>   printf("Received the following data: %s\n", junk);
>   return TRUE;
> }
> 
> int main (int argc, char *argv[])
> {
>   GtkWidget *window;
> 
>   char *aCommand;
>   aCommand = strdup("Foo");
> 
>   gtk_init (&argc, &argv);
>           
>   window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
>   gtk_widget_show(window);
>           
>   gtk_signal_connect(GTK_OBJECT(window), "delete_event",
>                      GTK_SIGNAL_FUNC(windowSignalHandlerStub), 
>                      (gpointer) aCommand);
> 
>   gtk_main ();
>   
>   return 0;
> }
> 
> ---
> 
>         Thanks for your time.
> 
> Cheers,
> Achint
> 
> PS: Passing data to the callbacks for the widgets works just fine....
> 
> 
> -- 
> Achint Sandhu
> Nortel
> 
> Windows 95: n. 32-bit extensions and a graphical shell for
>                a 16-bit patch to an 8-bit operating system originally 
>                coded for a 4-bit microprocessor, written by a 2-bit 
>                company that can't stand for 1 bit of competition.
> 
> -- 
> To unsubscribe: mail -s unsubscribe gtk-list-request@redhat.com < /dev/null
> 
> 

--
Shawn T. Amundson               
amundson@gimp.org               http://www.gimp.org/~amundson

"The assumption that the universe looks the same in every
 direction is clearly not true in reality." - Stephen Hawking