| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the documentation of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:FDL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in a
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| 14 | ** written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Free Documentation License
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Free
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| 18 | ** Documentation License version 1.3 as published by the Free Software
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| 19 | ** Foundation and appearing in the file included in the packaging of this
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| 20 | ** file.
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| 21 | **
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| 22 | ** If you have questions regarding the use of this file, please contact
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| 23 | ** Nokia at qt-info@nokia.com.
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| 24 | ** $QT_END_LICENSE$
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| 25 | **
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| 26 | ****************************************************************************/
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| 27 |
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| 28 | /*!
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| 29 | \example statemachine/twowaybutton
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| 30 | \title Two-way Button Example
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| 31 |
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| 32 | The Two-way button example shows how to use \l{The State Machine
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| 33 | Framework} to implement a simple state machine that toggles the current
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| 34 | state when a button is clicked.
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| 35 |
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| 36 | \snippet examples/statemachine/twowaybutton/main.cpp 0
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| 37 |
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| 38 | The application's main() function begins by constructing the application
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| 39 | object, a button and a state machine.
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| 40 |
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| 41 | \snippet examples/statemachine/twowaybutton/main.cpp 1
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| 42 |
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| 43 | The state machine has two states; \c on and \c off. When either state is
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| 44 | entered, the text of the button will be set accordingly.
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| 45 |
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| 46 | \snippet examples/statemachine/twowaybutton/main.cpp 2
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| 47 |
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| 48 | When the state machine is in the \c off state and the button is clicked,
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| 49 | it will transition to the \c on state; when the state machine is in the \c
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| 50 | on state and the button is clicked, it will transition to the \c off
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| 51 | state.
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| 52 |
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| 53 | \snippet examples/statemachine/twowaybutton/main.cpp 3
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| 54 |
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| 55 | The states are added to the state machine; they become top-level (sibling)
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| 56 | states.
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| 57 |
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| 58 | \snippet examples/statemachine/twowaybutton/main.cpp 4
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| 59 |
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| 60 | The initial state is \c off; this is the state the state machine will
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| 61 | immediately transition to once the state machine is started.
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| 62 |
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| 63 | \snippet examples/statemachine/twowaybutton/main.cpp 5
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| 64 |
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| 65 | Finally, the button is resized and made visible, and the application event
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| 66 | loop is entered.
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| 67 |
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| 68 | */
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