#include <gtk/gtk.h>

static void destroy (GtkWidget*, gpointer);
static void switch_page (GtkButton*, GtkNotebook*);

int main (int argc, 
          char *argv[])
{
  GtkWidget *window, *notebook;
  GtkWidget *label1, *label2, *child1, *child2;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window), "Notebook");
  gtk_container_set_border_width (GTK_CONTAINER (window), 10);
  gtk_widget_set_size_request (window, 250, 100);

  g_signal_connect (G_OBJECT (window), "destroy",
                    G_CALLBACK (destroy), NULL);

  notebook = gtk_notebook_new ();
  label1 = gtk_label_new ("Page One");
  label2 = gtk_label_new ("Page Two");
  child1 = gtk_button_new_with_label ("Go to page 2 to find the answer.");
  child2 = gtk_button_new_with_label ("Go to page 1 to find the answer.");
  
  /* Notice that two widgets were connected to the same callback function! */
  g_signal_connect (G_OBJECT (child1), "clicked",
                    G_CALLBACK (switch_page),
                    (gpointer) notebook);
  g_signal_connect (G_OBJECT (child2), "clicked",
                    G_CALLBACK (switch_page),
                    (gpointer) notebook);

  /* Append to pages to the notebook container. */
  gtk_notebook_append_page (GTK_NOTEBOOK (notebook), child1, label1);
  gtk_notebook_append_page (GTK_NOTEBOOK (notebook), child2, label2);

  gtk_notebook_set_tab_pos (GTK_NOTEBOOK (notebook), GTK_POS_BOTTOM);
  
  gtk_container_add (GTK_CONTAINER (window), notebook);
  gtk_widget_show_all (window);

  gtk_main ();
  return 0;
}

/* Switch between the current GtkNotebook page. */
static void 
switch_page (GtkButton *button, 
             GtkNotebook *notebook)
{
  gint page = gtk_notebook_get_current_page (notebook);
  
  if (page == 0)
    gtk_notebook_set_current_page (notebook, 1);
  else
    gtk_notebook_set_current_page (notebook, 0);
}

static void
destroy (GtkWidget *window,
         gpointer data)
{
  gtk_main_quit ();
}