/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the documentation of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

/*!

    \example statemachine/twowaybutton

    \title Two-way Button Example

    The Two-way button example shows how to use \l{The State Machine

    Framework} to implement a simple state machine that toggles the current

    state when a button is clicked.

    \snippet examples/statemachine/twowaybutton/main.cpp 0

    The application's main() function begins by constructing the application

    object, a button and a state machine.

    \snippet examples/statemachine/twowaybutton/main.cpp 1

    The state machine has two states; \c on and \c off. When either state is

    entered, the text of the button will be set accordingly.

    \snippet examples/statemachine/twowaybutton/main.cpp 2

    When the state machine is in the \c off state and the button is clicked,

    it will transition to the \c on state; when the state machine is in the \c

    on state and the button is clicked, it will transition to the \c off

    state.

    \snippet examples/statemachine/twowaybutton/main.cpp 3

    The states are added to the state machine; they become top-level (sibling)

    states.

    \snippet examples/statemachine/twowaybutton/main.cpp 4

    The initial state is \c off; this is the state the state machine will

    immediately transition to once the state machine is started.

    \snippet examples/statemachine/twowaybutton/main.cpp 5

    Finally, the button is resized and made visible, and the application event

    loop is entered.

*/