#include <gtk/gtk.h>

static void destroy (GtkWidget*, gpointer);
static gboolean delete_event (GtkWidget*, GdkEvent*, gpointer);

int main (int argc, 
          char *argv[])
{
  GtkWidget *window, *label;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window), "Hello World!");
  gtk_container_set_border_width (GTK_CONTAINER (window), 10);
  gtk_widget_set_size_request (window, 200, 100);

  /* Connect the main window to the destroy and delete-event signals. */
  g_signal_connect (G_OBJECT (window), "destroy",
                    G_CALLBACK (destroy), NULL);
  g_signal_connect (G_OBJECT (window), "delete_event",
                    G_CALLBACK (delete_event), NULL);

  /* Create a new GtkLabel widget that is selectable. */
  label = gtk_label_new ("Hello World");
  gtk_label_set_selectable (GTK_LABEL (label), TRUE);

  /* Add the label as a child widget of the window. */
  gtk_container_add (GTK_CONTAINER (window), label);
  gtk_widget_show_all (window);

  gtk_main ();
  return 0;
}

/* Stop the GTK+ main loop function. */
static void
destroy (GtkWidget *window,
         gpointer data)
{
  gtk_main_quit ();
}

/* Return FALSE to destroy the widget. By returning TRUE, you can cancel
 * a delete-event. This can be used to confirm quitting the application. */
static gboolean
delete_event (GtkWidget *window,
              GdkEvent *event,
              gpointer data)
{
  return FALSE;
}