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diff --git a/examples/buttongroups/buttongroups.cpp b/examples/buttongroups/buttongroups.cpp
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+++ b/examples/buttongroups/buttongroups.cpp
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+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "buttongroups.h"
+
+#include <qpopupmenu.h>
+#include <qbuttongroup.h>
+#include <qlayout.h>
+#include <qradiobutton.h>
+#include <qcheckbox.h>
+#include <qgroupbox.h>
+#include <qpushbutton.h>
+
+/*
+ * Constructor
+ *
+ * Creates all child widgets of the ButtonGroups window
+ */
+
+ButtonsGroups::ButtonsGroups( QWidget *parent, const char *name )
+    : QWidget( parent, name )
+{
+    // Create Widgets which allow easy layouting
+    QVBoxLayout *vbox = new QVBoxLayout( this, 11, 6 );
+    QHBoxLayout *box1 = new QHBoxLayout( vbox );
+    QHBoxLayout *box2 = new QHBoxLayout( vbox );
+
+    // ------- first group
+
+    // Create an exclusive button group
+    QButtonGroup *bgrp1 = new QButtonGroup( 1, QGroupBox::Horizontal, "Button Group 1 (exclusive)", this);
+    box1->addWidget( bgrp1 );
+    bgrp1->setExclusive( TRUE );
+
+    // insert 3 radiobuttons
+    QRadioButton *rb11 = new QRadioButton( "&Radiobutton 1", bgrp1 );
+    rb11->setChecked( TRUE );
+    (void)new QRadioButton( "R&adiobutton 2", bgrp1 );
+    (void)new QRadioButton( "Ra&diobutton 3", bgrp1 );
+
+    // ------- second group
+
+    // Create a non-exclusive buttongroup
+    QButtonGroup *bgrp2 = new QButtonGroup( 1, QGroupBox::Horizontal, "Button Group 2 (non-exclusive)", this );
+    box1->addWidget( bgrp2 );
+    bgrp2->setExclusive( FALSE );
+
+    // insert 3 checkboxes
+    (void)new QCheckBox( "&Checkbox 1", bgrp2 );
+    QCheckBox *cb12 = new QCheckBox( "C&heckbox 2", bgrp2 );
+    cb12->setChecked( TRUE );
+    QCheckBox *cb13 = new QCheckBox( "Triple &State Button", bgrp2 );
+    cb13->setTristate( TRUE );
+    cb13->setChecked( TRUE );
+
+    // ------------ third group
+
+    // create a buttongroup which is exclusive for radiobuttons and non-exclusive for all other buttons
+    QButtonGroup *bgrp3 = new QButtonGroup( 1, QGroupBox::Horizontal, "Button Group 3 (Radiobutton-exclusive)", this );
+    box2->addWidget( bgrp3 );
+    bgrp3->setRadioButtonExclusive( TRUE );
+
+    // insert three radiobuttons
+    rb21 = new QRadioButton( "Rad&iobutton 1", bgrp3 );
+    rb22 = new QRadioButton( "Radi&obutton 2", bgrp3 );
+    rb23 = new QRadioButton( "Radio&button 3", bgrp3 );
+    rb23->setChecked( TRUE );
+
+    // insert a checkbox...
+    state = new QCheckBox( "E&nable Radiobuttons", bgrp3 );
+    state->setChecked( TRUE );
+    // ...and connect its SIGNAL clicked() with the SLOT slotChangeGrp3State()
+    connect( state, SIGNAL( clicked() ), this, SLOT( slotChangeGrp3State() ) );
+
+    // ------------ fourth group
+
+    // create a groupbox which layouts its childs in a columns
+    QGroupBox *bgrp4 = new QButtonGroup( 1, QGroupBox::Horizontal, "Groupbox with normal buttons", this );
+    box2->addWidget( bgrp4 );
+
+    // insert four pushbuttons...
+    (void)new QPushButton( "&Push Button", bgrp4, "push" );
+
+    // now make the second one a toggle button
+    QPushButton *tb2 = new QPushButton( "&Toggle Button", bgrp4, "toggle" );
+    tb2->setToggleButton( TRUE );
+    tb2->setOn( TRUE );
+
+    // ... and make the third one a flat button
+    QPushButton *tb3 = new QPushButton( "&Flat Button", bgrp4, "flat" );
+    tb3->setFlat(TRUE);
+
+    // .. and the fourth a button with a menu
+    QPushButton *tb4 = new QPushButton( "Popup Button", bgrp4, "popup" );
+    QPopupMenu *menu = new QPopupMenu(tb4);
+    menu->insertItem("Item1", 0);
+    menu->insertItem("Item2", 1);
+    menu->insertItem("Item3", 2);
+    menu->insertItem("Item4", 3);
+    tb4->setPopup(menu);
+}
+
+/*
+ * SLOT slotChangeGrp3State()
+ *
+ * enables/disables the radiobuttons of the third buttongroup
+ */
+
+void ButtonsGroups::slotChangeGrp3State()
+{
+    rb21->setEnabled( state->isChecked() );
+    rb22->setEnabled( state->isChecked() );
+    rb23->setEnabled( state->isChecked() );
+}