Re: help......SEGMENTATION FAULT ERROR...

[John Cupitt <john cupitt ng-london org uk>]

nimeesh patel wrote:
> i'm giving my simple source code below ..In that code if i make my Button
> References as a global ..it gives segmentation fault error ..I'm not getting
> why this is happening..because if button references are local then it work
> properly..

Hi Nimeesh, make a struct, put your dialog widgets in that, and pass the struct
address about. Like this:

#include <gtk/gtk.h>

typedef struct
  {
    GtkWidget *window;
    GtkWidget *table;
    GtkWidget *connect;
    GtkWidget *disconnect;
  }
MyDialog;

static void
start_connection (GtkWidget * wid, MyDialog * mydia)
{
  gtk_widget_set_sensitive (mydia->connect, FALSE);
  gtk_widget_set_sensitive (mydia->disconnect, TRUE);
}

void
end_connection (GtkWidget * wid, MyDialog * mydia)
{
  gtk_widget_set_sensitive (mydia->connect, TRUE);
  gtk_widget_set_sensitive (mydia->disconnect, FALSE);
}

int
main (int argc, char *argv[])
{
  MyDialog mydia;

  gtk_init (&argc, &argv);

  mydia.window = gtk_window_new (GTK_WINDOW_DIALOG);
  gtk_window_set_policy (GTK_WINDOW (mydia.window), FALSE, FALSE, FALSE);
  gtk_window_set_title (GTK_WINDOW (mydia.window), "PPPoE for LINUX...");
  gtk_signal_connect (GTK_OBJECT (mydia.window), "destroy",
                      GTK_SIGNAL_FUNC (gtk_main_quit), NULL);
  gtk_widget_set_usize (mydia.window, 300, 300);

  mydia.table = gtk_table_new (6, 3, TRUE);
  gtk_container_add (GTK_CONTAINER (mydia.window), mydia.table);

  mydia.connect = gtk_button_new_with_label ("Connect");
  gtk_table_attach (GTK_TABLE (mydia.table), GTK_WIDGET (mydia.connect),
                    1, 2, 5, 6,
                    GTK_FILL, GTK_FILL,
                    5, 4);
  gtk_signal_connect (GTK_OBJECT (mydia.connect), "clicked",
                      GTK_SIGNAL_FUNC (start_connection), &mydia);

  mydia.disconnect = gtk_button_new_with_label ("Cancel");
  gtk_table_attach (GTK_TABLE (mydia.table), GTK_WIDGET (mydia.disconnect),
                    2, 3, 5, 6,
                    GTK_FILL, GTK_FILL,
                    5, 4);
  gtk_signal_connect (GTK_OBJECT (mydia.disconnect), "clicked",
                      GTK_SIGNAL_FUNC (end_connection), &mydia);

  gtk_widget_set_sensitive (GTK_WIDGET (mydia.disconnect), FALSE);

  gtk_widget_show_all (mydia.window);

  gtk_main ();

  return 0;
}