[556] | 1 | /****************************************************************************
|
---|
| 2 | **
|
---|
[651] | 3 | ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
|
---|
[556] | 4 | ** All rights reserved.
|
---|
| 5 | ** Contact: Nokia Corporation ([email protected])
|
---|
| 6 | **
|
---|
| 7 | ** This file is part of the documentation of the Qt Toolkit.
|
---|
| 8 | **
|
---|
| 9 | ** $QT_BEGIN_LICENSE:LGPL$
|
---|
| 10 | ** Commercial Usage
|
---|
| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
|
---|
| 12 | ** accordance with the Qt Commercial License Agreement provided with the
|
---|
| 13 | ** Software or, alternatively, in accordance with the terms contained in
|
---|
| 14 | ** a written agreement between you and Nokia.
|
---|
| 15 | **
|
---|
| 16 | ** GNU Lesser General Public License Usage
|
---|
| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
|
---|
| 18 | ** General Public License version 2.1 as published by the Free Software
|
---|
| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
|
---|
| 20 | ** packaging of this file. Please review the following information to
|
---|
| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
|
---|
| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
|
---|
| 23 | **
|
---|
| 24 | ** In addition, as a special exception, Nokia gives you certain additional
|
---|
| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
|
---|
| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
|
---|
| 27 | **
|
---|
| 28 | ** GNU General Public License Usage
|
---|
| 29 | ** Alternatively, this file may be used under the terms of the GNU
|
---|
| 30 | ** General Public License version 3.0 as published by the Free Software
|
---|
| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
|
---|
| 32 | ** packaging of this file. Please review the following information to
|
---|
| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
|
---|
| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
|
---|
| 35 | **
|
---|
| 36 | ** If you have questions regarding the use of this file, please contact
|
---|
| 37 | ** Nokia at [email protected].
|
---|
| 38 | ** $QT_END_LICENSE$
|
---|
| 39 | **
|
---|
| 40 | ****************************************************************************/
|
---|
| 41 |
|
---|
| 42 | /*!
|
---|
| 43 | \example statemachine/twowaybutton
|
---|
| 44 | \title Two-way Button Example
|
---|
| 45 |
|
---|
| 46 | The Two-way button example shows how to use \l{The State Machine
|
---|
| 47 | Framework} to implement a simple state machine that toggles the current
|
---|
| 48 | state when a button is clicked.
|
---|
| 49 |
|
---|
| 50 | \snippet examples/statemachine/twowaybutton/main.cpp 0
|
---|
| 51 |
|
---|
| 52 | The application's main() function begins by constructing the application
|
---|
| 53 | object, a button and a state machine.
|
---|
| 54 |
|
---|
| 55 | \snippet examples/statemachine/twowaybutton/main.cpp 1
|
---|
| 56 |
|
---|
| 57 | The state machine has two states; \c on and \c off. When either state is
|
---|
| 58 | entered, the text of the button will be set accordingly.
|
---|
| 59 |
|
---|
| 60 | \snippet examples/statemachine/twowaybutton/main.cpp 2
|
---|
| 61 |
|
---|
| 62 | When the state machine is in the \c off state and the button is clicked,
|
---|
| 63 | it will transition to the \c on state; when the state machine is in the \c
|
---|
| 64 | on state and the button is clicked, it will transition to the \c off
|
---|
| 65 | state.
|
---|
| 66 |
|
---|
| 67 | \snippet examples/statemachine/twowaybutton/main.cpp 3
|
---|
| 68 |
|
---|
| 69 | The states are added to the state machine; they become top-level (sibling)
|
---|
| 70 | states.
|
---|
| 71 |
|
---|
| 72 | \snippet examples/statemachine/twowaybutton/main.cpp 4
|
---|
| 73 |
|
---|
| 74 | The initial state is \c off; this is the state the state machine will
|
---|
| 75 | immediately transition to once the state machine is started.
|
---|
| 76 |
|
---|
| 77 | \snippet examples/statemachine/twowaybutton/main.cpp 5
|
---|
| 78 |
|
---|
| 79 | Finally, the button is resized and made visible, and the application event
|
---|
| 80 | loop is entered.
|
---|
| 81 |
|
---|
| 82 | */
|
---|