{

  This file extracted from the GTK 1.2 tutorial.
  Section 6.4

  Converted from C to Pascal by Thomas E. Payne
}
 program Tut6_4;

{$mode objfpc}

 uses
  glib,gdk,gtk,sysutils;

    //* example-start radiobuttons radiobuttons.c *//

    procedure close_application( widget : pGtkWidget;
                            event : pGdkEvent;
                            data : gpointer ); cdecl;
    begin
      gtk_main_quit();
    end;

  var
    window,box1,box2,button,separator : pGtkWidget;
    group : pGSList;

  begin
        gtk_init(@argc,@argv);

        window := Nil;

        window := gtk_window_new (GTK_WINDOW_TOPLEVEL);

        gtk_signal_connect (GTK_OBJECT (window), 'delete_event',
                            GTK_SIGNAL_FUNC(@close_application),
                            Nil);

        gtk_window_set_title (GTK_WINDOW (window), 'radio buttons');
        gtk_container_set_border_width (GTK_CONTAINER (window), 0);

        box1 := gtk_vbox_new (FALSE, 0);
        gtk_container_add (GTK_CONTAINER (window), box1);
        gtk_widget_show (box1);

        box2 := gtk_vbox_new (FALSE, 10);
        gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
        gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
        gtk_widget_show (box2);

        button := gtk_radio_button_new_with_label (Nil, 'button1');
        gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
        gtk_widget_show (button);

        group := gtk_radio_button_group (GTK_RADIO_BUTTON (button));
        button := gtk_radio_button_new_with_label(group, 'button2');
        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
        gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
        gtk_widget_show (button);

        button := gtk_radio_button_new_with_label(
                     gtk_radio_button_group (GTK_RADIO_BUTTON (button)),
                     'button3');
        gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
        gtk_widget_show (button);

        separator := gtk_hseparator_new ();
        gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);
        gtk_widget_show (separator);

        box2 := gtk_vbox_new (FALSE, 10);
        gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
        gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);
        gtk_widget_show (box2);

        button := gtk_button_new_with_label ('close');
        gtk_signal_connect_object (GTK_OBJECT (button), 'clicked',
                                   GTK_SIGNAL_FUNC(@close_application),
                                   GTK_OBJECT (window));
        gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
        GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
        gtk_widget_grab_default (button);
        gtk_widget_show (button);
        gtk_widget_show (window);

        gtk_main();
  end.