#include <gtk/gtk.h>

static void destroy (GtkWidget*, gpointer);
static gboolean button_pressed (GtkWidget*, GdkEventButton*, GtkLabel*);

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

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window), "Event Box");
  gtk_container_set_border_width (GTK_CONTAINER (window), 10);
  gtk_widget_set_size_request (window, 200, 50);

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

  eventbox = gtk_event_box_new ();
  label = gtk_label_new ("Double-Click Me!");

  /* Set the order in which widgets will receive notification of events. */
  gtk_event_box_set_above_child (GTK_EVENT_BOX (eventbox), FALSE);

  g_signal_connect (G_OBJECT (eventbox), "button_press_event",
                    G_CALLBACK (button_pressed), (gpointer) label);

  gtk_container_add (GTK_CONTAINER (eventbox), label);
  gtk_container_add (GTK_CONTAINER (window), eventbox);

  /* Allow the event box to catch button presses, realize the widget, and set the
   * cursor that will be displayed when the mouse is over the event box. */
  gtk_widget_set_events (eventbox, GDK_BUTTON_PRESS_MASK);
  gtk_widget_realize (eventbox);
  gdk_window_set_cursor (eventbox->window, gdk_cursor_new (GDK_HAND1));
  gtk_widget_show_all (window);
  
  gtk_main ();
  return 0;
}

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

/* This is called every time a button-press-event occurs on the GtkEventBox. */
static gboolean 
button_pressed (GtkWidget *eventbox, 
                GdkEventButton *event, 
                GtkLabel *label)
{
  if (event->type == GDK_2BUTTON_PRESS)
  {
    const gchar *text = gtk_label_get_text (label);
    
    if (text[0] == 'D')
      gtk_label_set_text (label, "I Was Double-Clicked!");
    else
      gtk_label_set_text (label, "Double-Click Me Again!");
  }

  return FALSE;
}