/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Free Documentation License Usage
** 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. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: http://www.gnu.org/copyleft/fdl.html.
** $QT_END_LICENSE$
**
****************************************************************************/

/*!
    \example statemachine/eventtransitions
    \title Event Transitions Example

    \brief The Event Transitions example shows how to use event transitions, a
    feature of \l{The State Machine Framework}.

    \snippet statemachine/eventtransitions/main.cpp 0

    The \c Window class's constructors begins by creating a button.

    \snippet statemachine/eventtransitions/main.cpp 1

    Two states, \c s1 and \c s2, are created; upon entry they will assign
    "Outside" and "Inside" to the button's text, respectively.

    \snippet statemachine/eventtransitions/main.cpp 2

    When the button receives an event of type QEvent::Enter and the state
    machine is in state \c s1, the machine will transition to state \c s2.

    \snippet statemachine/eventtransitions/main.cpp 3

    When the button receives an event of type QEvent::Leave and the state
    machine is in state \c s2, the machine will transition back to state \c
    s1.

    \snippet statemachine/eventtransitions/main.cpp 4

    Next, the state \c s3 is created. \c s3 will be entered when the button
    receives an event of type QEvent::MouseButtonPress and the state machine
    is in state \c s2. When the button receives an event of type
    QEvent::MouseButtonRelease and the state machine is in state \c s3, the
    machine will transition back to state \c s2.

    \snippet statemachine/eventtransitions/main.cpp 5

    Finally, the states are added to the machine as top-level states, the
    initial state is set to be \c s1 ("Outside"), and the machine is started.

    \snippet statemachine/eventtransitions/main.cpp 6

    The main() function constructs a Window object and shows it.

*/
