text: /* Button Boxes
   *
   * The Button Box widgets are used to arrange buttons with padding.
   */
  
  #include <gtk/gtk.h>
  
  static GtkWidget *
  create_bbox (gint  horizontal,
  	     char *title, 
  	     gint  spacing,
  	     gint  layout)
  {
    GtkWidget *frame;
    GtkWidget *bbox;
    GtkWidget *button;
  	
    frame = gtk_frame_new (title);
  
    if (horizontal)
      bbox = gtk_hbutton_box_new ();
    else
      bbox = gtk_vbutton_box_new ();
  
    gtk_container_set_border_width (GTK_CONTAINER (bbox), 5);
    gtk_container_add (GTK_CONTAINER (frame), bbox);
  
    gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), layout);
    gtk_box_set_spacing (GTK_BOX (bbox), spacing);
    
    button = gtk_button_new_from_stock (GTK_STOCK_OK);
    gtk_container_add (GTK_CONTAINER (bbox), button);
    
    button = gtk_button_new_from_stock (GTK_STOCK_CANCEL);
    gtk_container_add (GTK_CONTAINER (bbox), button);
    
    button = gtk_button_new_from_stock (GTK_STOCK_HELP);
    gtk_container_add (GTK_CONTAINER (bbox), button);
  
    return frame;
  }
  
  GtkWidget *
  do_button_box (GtkWidget *do_widget)
  {
    static GtkWidget *window = NULL;
    GtkWidget *main_vbox;
    GtkWidget *vbox;
    GtkWidget *hbox;
    GtkWidget *frame_horz;
    GtkWidget *frame_vert;
  	
    if (!window)
    {
      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
      gtk_window_set_screen (GTK_WINDOW (window),
  			   gtk_widget_get_screen (do_widget));
      gtk_window_set_title (GTK_WINDOW (window), "Button Boxes");
      
      g_signal_connect (window, "destroy",
  		      G_CALLBACK (gtk_widget_destroyed),
  		      &window);
      
      gtk_container_set_border_width (GTK_CONTAINER (window), 10);
  
      main_vbox = gtk_vbox_new (FALSE, 0);
      gtk_container_add (GTK_CONTAINER (window), main_vbox);
      
      frame_horz = gtk_frame_new ("Horizontal Button Boxes");
      gtk_box_pack_start (GTK_BOX (main_vbox), frame_horz, TRUE, TRUE, 10);
      
      vbox = gtk_vbox_new (FALSE, 0);
      gtk_container_set_border_width (GTK_CONTAINER (vbox), 10);
      gtk_container_add (GTK_CONTAINER (frame_horz), vbox);
  
      gtk_box_pack_start (GTK_BOX (vbox), 
  			create_bbox (TRUE, "Spread", 40, GTK_BUTTONBOX_SPREAD),
  			TRUE, TRUE, 0);
  
      gtk_box_pack_start (GTK_BOX (vbox), 
  			create_bbox (TRUE, "Edge", 40, GTK_BUTTONBOX_EDGE),
  			TRUE, TRUE, 5);
      
      gtk_box_pack_start (GTK_BOX (vbox), 
  			create_bbox (TRUE, "Start", 40, GTK_BUTTONBOX_START),
  			TRUE, TRUE, 5);
      
      gtk_box_pack_start (GTK_BOX (vbox), 
  			create_bbox (TRUE, "End", 40, GTK_BUTTONBOX_END),
  			TRUE, TRUE, 5);
  
      frame_vert = gtk_frame_new ("Vertical Button Boxes");
      gtk_box_pack_start (GTK_BOX (main_vbox), frame_vert, TRUE, TRUE, 10);
      
      hbox = gtk_hbox_new (FALSE, 0);
      gtk_container_set_border_width (GTK_CONTAINER (hbox), 10);
      gtk_container_add (GTK_CONTAINER (frame_vert), hbox);
  
      gtk_box_pack_start (GTK_BOX (hbox), 
  			create_bbox (FALSE, "Spread", 30, GTK_BUTTONBOX_SPREAD),
  			TRUE, TRUE, 0);
  
      gtk_box_pack_start (GTK_BOX (hbox), 
  			create_bbox (FALSE, "Edge", 30, GTK_BUTTONBOX_EDGE),
  			TRUE, TRUE, 5);
  
      gtk_box_pack_start (GTK_BOX (hbox), 
  			create_bbox (FALSE, "Start", 30, GTK_BUTTONBOX_START),
  			TRUE, TRUE, 5);
  
      gtk_box_pack_start (GTK_BOX (hbox), 
  			create_bbox (FALSE, "End", 30, GTK_BUTTONBOX_END),
  			TRUE, TRUE, 5);
    }
  
    if (!GTK_WIDGET_VISIBLE (window))
      {
        gtk_widget_show_all (window);
      }
    else
      {	 
        gtk_widget_destroy (window);
        window = NULL;
      }
  
    return window;
  }
  