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     2 **

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

     4 ** All rights reserved.

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

     6 **

     7 ** This file is part of the QtCore module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

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

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

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

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

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

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    36 **

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    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 //! [0]

    45 class Window : public QWidget

    46 {

    47 public:

    48     Window(QWidget *parent = 0)

    49         : QWidget(parent)

    50     {

    51         QPushButton *button = new QPushButton(this);

    52         button->setGeometry(QRect(100, 100, 100, 100));

    53 //! [0]

    54 

    55 //! [1]

    56         QStateMachine *machine = new QStateMachine(this);

    57 

    58         QState *s1 = new QState();

    59         s1->assignProperty(button, "text", "Outside");

    60 

    61         QState *s2 = new QState();

    62         s2->assignProperty(button, "text", "Inside");

    63 //! [1]

    64 

    65 //! [2]

    66         QEventTransition *enterTransition = new QEventTransition(button, QEvent::Enter);

    67         enterTransition->setTargetState(s2);

    68         s1->addTransition(enterTransition);

    69 //! [2]

    70 

    71 //! [3]

    72         QEventTransition *leaveTransition = new QEventTransition(button, QEvent::Leave);

    73         leaveTransition->setTargetState(s1);

    74         s2->addTransition(leaveTransition);

    75 //! [3]

    76 

    77 //! [4]

    78         QState *s3 = new QState();

    79         s3->assignProperty(button, "text", "Pressing...");

    80 

    81         QEventTransition *pressTransition = new QEventTransition(button, QEvent::MouseButtonPress);

    82         pressTransition->setTargetState(s3);

    83         s2->addTransition(pressTransition);

    84 

    85         QEventTransition *releaseTransition = new QEventTransition(button, QEvent::MouseButtonRelease);

    86         releaseTransition->setTargetState(s2);

    87         s3->addTransition(releaseTransition);

    88 //! [4]

    89 

    90 //! [5]

    91         machine->addState(s1);

    92         machine->addState(s2);

    93         machine->addState(s3);

    94 

    95         machine->setInitialState(s1);

    96         machine->start();

    97     }

    98 };

    99 //! [5]

   100 

   101 //! [6]

   102 int main(int argc, char **argv)

   103 {

   104     QApplication app(argc, argv);

   105     Window window;

   106     window.resize(300, 300);

   107     window.show();

   108 

   109     return app.exec();

   110 }

   111 //! [6]