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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** GNU Free Documentation License
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms
+** and conditions contained in a signed written agreement between you
+** and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \example widgets/groupbox
+    \title Group Box Example
+
+    The Group Box example shows how to use the different kinds of group
+    boxes in Qt.
+
+    Group boxes are container widgets that organize buttons into groups,
+    both logically and on screen. They manage the interactions between
+    the user and the application so that you do not have to enforce
+    simple constraints.
+
+    Group boxes are usually used to organize check boxes and radio
+    buttons into exclusive groups.
+
+    \image groupbox-example.png
+
+    The Group Boxes example consists of a single \c Window class that
+    is used to show four group boxes: an exclusive radio button group,
+    a non-exclusive checkbox group, an exclusive radio button group
+    with an enabling checkbox, and a group box with normal push buttons.
+
+    \section1 Window Class Definition
+
+    The \c Window class is a subclass of \c QWidget that is used to
+    display a number of group boxes. The class definition contains
+    functions to construct each group box and populate it with different
+    selections of button widgets:
+
+    \snippet widgets/groupbox/window.h 0
+
+    In the example, the widget will be used as a top-level window, so
+    the constructor is defined so that we do not have to specify a parent
+    widget.
+
+    \section1 Window Class Implementation
+
+    The constructor creates a grid layout and fills it with each of the
+    group boxes that are to be displayed:
+
+    \snippet widgets/groupbox/window.cpp 0
+
+    The functions used to create each group box each return a
+    QGroupBox to be inserted into the grid layout.
+
+    \snippet widgets/groupbox/window.cpp 1
+
+    The first group box contains and manages three radio buttons. Since
+    the group box contains only radio buttons, it is exclusive by
+    default, so only one radio button can be checked at any given time.
+    We check the first radio button to ensure that the button group
+    contains one checked button.
+
+    \snippet widgets/groupbox/window.cpp 3
+
+    We use a vertical layout within the group box to present the
+    buttons in the form of a vertical list, and return the group
+    box to the constructor.
+
+    The second group box is itself checkable, providing a convenient
+    way to disable all the buttons inside it. Initially, it is
+    unchecked, so the group box itself must be checked before any of
+    the radio buttons inside can be checked.
+
+    \snippet widgets/groupbox/window.cpp 4
+
+    The group box contains three exclusive radio buttons, and an
+    independent checkbox. For consistency, one radio button must be
+    checked at all times, so we ensure that the first one is initially
+    checked.
+
+    \snippet widgets/groupbox/window.cpp 5
+
+    The buttons are arranged in the same way as those in the first
+    group box.
+
+    \snippet widgets/groupbox/window.cpp 6
+
+    The third group box is constructed with a "flat" style that is
+    better suited to certain types of dialog.
+
+    \snippet widgets/groupbox/window.cpp 7
+
+    This group box contains only checkboxes, so it is non-exclusive by
+    default. This means that each checkbox can be checked independently
+    of the others.
+
+    \snippet widgets/groupbox/window.cpp 8
+
+    Again, we use a vertical layout within the group box to present
+    the buttons in the form of a vertical list.
+
+    \snippet widgets/groupbox/window.cpp 9
+
+    The final group box contains only push buttons and, like the
+    second group box, it is checkable.
+
+    \snippet widgets/groupbox/window.cpp 10
+
+    We create a normal button, a toggle button, and a flat push button:
+
+    \snippet widgets/groupbox/window.cpp 11
+
+    Push buttons can be used to display popup menus. We create one, and
+    attach a simple menu to it:
+
+    \snippet widgets/groupbox/window.cpp 12
+
+    Finally, we lay out the widgets vertically, and return the group box
+    that we created:
+
+    \snippet widgets/groupbox/window.cpp 13
+*/