Initial import from the monolithic Qt.

This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

17 files changed, 1248 insertions, 0 deletions

diff --git a/examples/statemachine/README b/examples/statemachine/README
new file mode 100644
index 0000000000..2879e67d65
--- /dev/null
+++ b/examples/statemachine/README
@@ -0,0 +1,36 @@
+Qt is provided with a powerful hierchical finite state machine through
+the Qt State Machine classes.
+
+The example launcher provided with Qt can be used to explore each of the
+examples in this directory.
+
+Documentation for these examples can be found via the Tutorial and Examples
+link in the main Qt documentation.
+
+
+Finding the Qt Examples and Demos launcher
+==========================================
+
+On Windows:
+
+The launcher can be accessed via the Windows Start menu. Select the menu
+entry entitled "Qt Examples and Demos" entry in the submenu containing
+the Qt tools.
+
+On Mac OS X:
+
+For the binary distribution, the qtdemo executable is installed in the
+/Developer/Applications/Qt directory. For the source distribution, it is
+installed alongside the other Qt tools on the path specified when Qt is
+configured.
+
+On Unix/Linux:
+
+The qtdemo executable is installed alongside the other Qt tools on the path
+specified when Qt is configured.
+
+On all platforms:
+
+The source code for the launcher can be found in the demos/qtdemo directory
+in the Qt package. This example is built at the same time as the Qt libraries,
+tools, examples, and demonstrations.
diff --git a/examples/statemachine/eventtransitions/eventtransitions.pro b/examples/statemachine/eventtransitions/eventtransitions.pro
new file mode 100644
index 0000000000..646c90a07d
--- /dev/null
+++ b/examples/statemachine/eventtransitions/eventtransitions.pro
@@ -0,0 +1,7 @@
+SOURCES = main.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/eventtransitions
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS eventtransitions.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/eventtransitions
+INSTALLS += target sources
diff --git a/examples/statemachine/eventtransitions/main.cpp b/examples/statemachine/eventtransitions/main.cpp
new file mode 100644
index 0000000000..5391057992
--- /dev/null
+++ b/examples/statemachine/eventtransitions/main.cpp
@@ -0,0 +1,110 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+//! [0]
+class Window : public QWidget
+{
+public:
+    Window(QWidget *parent = 0)
+        : QWidget(parent)
+    {
+        QPushButton *button = new QPushButton(this);
+        button->setGeometry(QRect(100, 100, 100, 100));
+//! [0]
+
+//! [1]
+        QStateMachine *machine = new QStateMachine(this);
+
+        QState *s1 = new QState();
+        s1->assignProperty(button, "text", "Outside");
+
+        QState *s2 = new QState();
+        s2->assignProperty(button, "text", "Inside");
+//! [1]
+
+//! [2]
+        QEventTransition *enterTransition = new QEventTransition(button, QEvent::Enter);
+        enterTransition->setTargetState(s2);
+        s1->addTransition(enterTransition);
+//! [2]
+
+//! [3]
+        QEventTransition *leaveTransition = new QEventTransition(button, QEvent::Leave);
+        leaveTransition->setTargetState(s1);
+        s2->addTransition(leaveTransition);
+//! [3]
+
+//! [4]
+        QState *s3 = new QState();
+        s3->assignProperty(button, "text", "Pressing...");
+
+        QEventTransition *pressTransition = new QEventTransition(button, QEvent::MouseButtonPress);
+        pressTransition->setTargetState(s3);
+        s2->addTransition(pressTransition);
+
+        QEventTransition *releaseTransition = new QEventTransition(button, QEvent::MouseButtonRelease);
+        releaseTransition->setTargetState(s2);
+        s3->addTransition(releaseTransition);
+//! [4]
+
+//! [5]
+        machine->addState(s1);
+        machine->addState(s2);
+        machine->addState(s3);
+
+        machine->setInitialState(s1);
+        machine->start();
+    }
+};
+//! [5]
+
+//! [6]
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+    Window window;
+    window.resize(300, 300);
+    window.show();
+
+    return app.exec();
+}
+//! [6]
diff --git a/examples/statemachine/factorial/factorial.pro b/examples/statemachine/factorial/factorial.pro
new file mode 100644
index 0000000000..4291d43306
--- /dev/null
+++ b/examples/statemachine/factorial/factorial.pro
@@ -0,0 +1,11 @@
+QT = core
+win32: CONFIG += console
+mac:CONFIG -= app_bundle
+
+SOURCES += main.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/factorial
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS factorial.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/factorial
+INSTALLS += target sources
diff --git a/examples/statemachine/factorial/main.cpp b/examples/statemachine/factorial/main.cpp
new file mode 100644
index 0000000000..15e1306e24
--- /dev/null
+++ b/examples/statemachine/factorial/main.cpp
@@ -0,0 +1,175 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore>
+#include <stdio.h>
+
+//! [0]
+class Factorial : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(int x READ x WRITE setX)
+    Q_PROPERTY(int fac READ fac WRITE setFac)
+public:
+    Factorial(QObject *parent = 0)
+        : QObject(parent), m_x(-1), m_fac(1)
+    {
+    }
+
+    int x() const
+    {
+        return m_x;
+    }
+
+    void setX(int x)
+    {
+        if (x == m_x)
+            return;
+        m_x = x;
+        emit xChanged(x);
+    }
+
+    int fac() const
+    {
+        return m_fac;
+    }
+
+    void setFac(int fac)
+    {
+        m_fac = fac;
+    }
+
+Q_SIGNALS:
+    void xChanged(int value);
+    
+private:
+    int m_x;
+    int m_fac;
+};
+//! [0]
+
+//! [1]
+class FactorialLoopTransition : public QSignalTransition
+{
+public:
+    FactorialLoopTransition(Factorial *fact)
+        : QSignalTransition(fact, SIGNAL(xChanged(int))), m_fact(fact)
+    {}
+
+    virtual bool eventTest(QEvent *e)
+    {
+        if (!QSignalTransition::eventTest(e))
+            return false;
+        QStateMachine::SignalEvent *se = static_cast<QStateMachine::SignalEvent*>(e);
+        return se->arguments().at(0).toInt() > 1;
+    }
+
+    virtual void onTransition(QEvent *e)
+    {
+        QStateMachine::SignalEvent *se = static_cast<QStateMachine::SignalEvent*>(e);
+        int x = se->arguments().at(0).toInt();
+        int fac = m_fact->property("fac").toInt();
+        m_fact->setProperty("fac",  x * fac);
+        m_fact->setProperty("x",  x - 1);
+    }
+
+private:
+    Factorial *m_fact;
+};
+//! [1]
+
+//! [2]
+class FactorialDoneTransition : public QSignalTransition
+{
+public:
+    FactorialDoneTransition(Factorial *fact)
+        : QSignalTransition(fact, SIGNAL(xChanged(int))), m_fact(fact)
+    {}
+
+    virtual bool eventTest(QEvent *e)
+    {
+        if (!QSignalTransition::eventTest(e))
+            return false;
+        QStateMachine::SignalEvent *se = static_cast<QStateMachine::SignalEvent*>(e);
+        return se->arguments().at(0).toInt() <= 1;
+    }
+
+    virtual void onTransition(QEvent *)
+    {
+        fprintf(stdout, "%d\n", m_fact->property("fac").toInt());
+    }
+
+private:
+    Factorial *m_fact;
+};
+//! [2]
+
+//! [3]
+int main(int argc, char **argv)
+{
+    QCoreApplication app(argc, argv);
+    Factorial factorial;
+    QStateMachine machine;
+//! [3]
+
+//! [4]
+    QState *compute = new QState(&machine);
+    compute->assignProperty(&factorial, "fac", 1);
+    compute->assignProperty(&factorial, "x", 6);
+    compute->addTransition(new FactorialLoopTransition(&factorial));
+//! [4]
+
+//! [5]
+    QFinalState *done = new QFinalState(&machine);
+    FactorialDoneTransition *doneTransition = new FactorialDoneTransition(&factorial);
+    doneTransition->setTargetState(done);
+    compute->addTransition(doneTransition);
+//! [5]
+
+//! [6]
+    machine.setInitialState(compute);
+    QObject::connect(&machine, SIGNAL(finished()), &app, SLOT(quit()));
+    machine.start();
+
+    return app.exec();
+}
+//! [6]
+
+#include "main.moc"
diff --git a/examples/statemachine/pingpong/main.cpp b/examples/statemachine/pingpong/main.cpp
new file mode 100644
index 0000000000..330824d3e8
--- /dev/null
+++ b/examples/statemachine/pingpong/main.cpp
@@ -0,0 +1,139 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore>
+#include <stdio.h>
+
+//! [0]
+class PingEvent : public QEvent
+{
+public:
+    PingEvent() : QEvent(QEvent::Type(QEvent::User+2))
+        {}
+};
+
+class PongEvent : public QEvent
+{
+public:
+    PongEvent() : QEvent(QEvent::Type(QEvent::User+3))
+        {}
+};
+//! [0]
+
+//! [1]
+class Pinger : public QState
+{
+public:
+    Pinger(QState *parent)
+        : QState(parent) {}
+
+protected:
+    virtual void onEntry(QEvent *)
+    {
+        machine()->postEvent(new PingEvent());
+        fprintf(stdout, "ping?\n");
+    }
+};
+//! [1]
+
+//! [3]
+class PongTransition : public QAbstractTransition
+{
+public:
+    PongTransition() {}
+
+protected:
+    virtual bool eventTest(QEvent *e) {
+        return (e->type() == QEvent::User+3);
+    }
+    virtual void onTransition(QEvent *)
+    {
+        machine()->postDelayedEvent(new PingEvent(), 500);
+        fprintf(stdout, "ping?\n");
+    }
+};
+//! [3]
+
+//! [2]
+class PingTransition : public QAbstractTransition
+{
+public:
+    PingTransition() {}
+
+protected:
+    virtual bool eventTest(QEvent *e) {
+        return (e->type() == QEvent::User+2);
+    }
+    virtual void onTransition(QEvent *)
+    {
+        machine()->postDelayedEvent(new PongEvent(), 500);
+        fprintf(stdout, "pong!\n");
+    }
+};
+//! [2]
+
+//! [4]
+int main(int argc, char **argv)
+{
+    QCoreApplication app(argc, argv);
+
+    QStateMachine machine;
+    QState *group = new QState(QState::ParallelStates);
+    group->setObjectName("group");
+//! [4]
+
+//! [5]
+    Pinger *pinger = new Pinger(group);
+    pinger->setObjectName("pinger");
+    pinger->addTransition(new PongTransition());
+
+    QState *ponger = new QState(group);
+    ponger->setObjectName("ponger");
+    ponger->addTransition(new PingTransition());
+//! [5]
+
+//! [6]
+    machine.addState(group);
+    machine.setInitialState(group);
+    machine.start();
+
+    return app.exec();
+}
+//! [6]
diff --git a/examples/statemachine/pingpong/pingpong.pro b/examples/statemachine/pingpong/pingpong.pro
new file mode 100644
index 0000000000..9d2b17fc9e
--- /dev/null
+++ b/examples/statemachine/pingpong/pingpong.pro
@@ -0,0 +1,11 @@
+QT = core
+win32: CONFIG += console
+mac:CONFIG -= app_bundle
+
+SOURCES = main.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/pingpong
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS pingpong.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/pingpong
+INSTALLS += target sources
diff --git a/examples/statemachine/rogue/main.cpp b/examples/statemachine/rogue/main.cpp
new file mode 100644
index 0000000000..71c2c69470
--- /dev/null
+++ b/examples/statemachine/rogue/main.cpp
@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "window.h"
+
+int main(int argv, char **args)
+{
+    QApplication app(argv, args);
+
+    Window window;
+    window.show();
+
+    return app.exec();
+}
+
diff --git a/examples/statemachine/rogue/movementtransition.h b/examples/statemachine/rogue/movementtransition.h
new file mode 100644
index 0000000000..1153b7508d
--- /dev/null
+++ b/examples/statemachine/rogue/movementtransition.h
@@ -0,0 +1,107 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MOVEMENTTRANSITION_H
+#define MOVEMENTTRANSITION_H
+
+#include <QtGui>
+
+#include "window.h"
+
+//![0]
+class MovementTransition : public QEventTransition
+{
+    Q_OBJECT
+
+public:
+    MovementTransition(Window *window) :
+        QEventTransition(window, QEvent::KeyPress) {
+        this->window = window;
+    }
+//![0]
+
+//![1]
+protected:
+    bool eventTest(QEvent *event) {
+        if (event->type() == QEvent::StateMachineWrapped &&
+            static_cast<QStateMachine::WrappedEvent *>(event)->event()->type() == QEvent::KeyPress) {
+            QEvent *wrappedEvent = static_cast<QStateMachine::WrappedEvent *>(event)->event();
+
+            QKeyEvent *keyEvent = static_cast<QKeyEvent *>(wrappedEvent);
+            int key = keyEvent->key();
+
+            return key == Qt::Key_2 || key == Qt::Key_8 || key == Qt::Key_6 ||
+                   key == Qt::Key_4;
+        }
+        return false;
+    }
+//![1]
+
+//![2]
+    void onTransition(QEvent *event) {
+        QKeyEvent *keyEvent = static_cast<QKeyEvent *>(
+            static_cast<QStateMachine::WrappedEvent *>(event)->event());
+
+        int key = keyEvent->key();
+        switch (key) {
+            case Qt::Key_4:
+                window->movePlayer(Window::Left);
+                break;
+            case Qt::Key_8:
+                window->movePlayer(Window::Up);
+                break;
+            case Qt::Key_6:
+                window->movePlayer(Window::Right);
+                break;
+            case Qt::Key_2:
+                window->movePlayer(Window::Down);
+                break;
+            default:
+                ;
+        }
+    }
+//![2]
+
+private:
+    Window *window;
+};
+
+#endif
+
diff --git a/examples/statemachine/rogue/rogue.pro b/examples/statemachine/rogue/rogue.pro
new file mode 100644
index 0000000000..6ab613bea9
--- /dev/null
+++ b/examples/statemachine/rogue/rogue.pro
@@ -0,0 +1,11 @@
+HEADERS       = window.h \
+                movementtransition.h
+SOURCES       = main.cpp \
+                window.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/rogue
+sources.files = $$SOURCES $$HEADERS *.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/rogue
+INSTALLS += target sources
+
diff --git a/examples/statemachine/rogue/window.cpp b/examples/statemachine/rogue/window.cpp
new file mode 100644
index 0000000000..39f5aa65d9
--- /dev/null
+++ b/examples/statemachine/rogue/window.cpp
@@ -0,0 +1,200 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "window.h"
+#include "movementtransition.h"
+
+//![0]
+Window::Window()
+{
+    pX = 5;
+    pY = 5;
+//![0]
+
+    QFontDatabase database;
+    QFont font;
+    if (database.families().contains("Monospace"))
+        font = QFont("Monospace", 12);
+    else {
+        foreach (QString family, database.families()) {
+            if (database.isFixedPitch(family)) {
+                font = QFont(family, 12);
+                break;
+            }
+        }
+    }
+    setFont(font);
+
+//![1]
+    setupMap();
+    buildMachine();
+}
+//![1]
+
+void Window::setStatus(const QString &status)
+{
+    myStatus = status;
+    repaint();
+}
+
+QString Window::status() const
+{
+    return myStatus;
+}
+
+void Window::paintEvent(QPaintEvent * /* event */)
+{
+    QFontMetrics metrics(font());
+    QPainter painter(this);
+    int fontHeight = metrics.height();
+    int fontWidth = metrics.width('X');
+    int yPos = fontHeight;
+    int xPos;
+
+    painter.fillRect(rect(), Qt::black);
+    painter.setPen(Qt::white);
+
+    painter.drawText(QPoint(0, yPos), status());
+    
+    for (int y = 0; y < HEIGHT; ++y) {
+        yPos += fontHeight;
+        xPos = 0;
+
+        for (int x = 0; x < WIDTH; ++x) {
+            if (y == pY && x == pX) {
+                xPos += fontWidth;
+                continue;
+            }
+
+            painter.drawText(QPoint(xPos, yPos), map[x][y]);
+            xPos += fontWidth;
+        }
+    }
+    painter.drawText(QPoint(pX * fontWidth, (pY + 2) * fontHeight), QChar('@'));
+}
+
+QSize Window::sizeHint() const
+{
+    QFontMetrics metrics(font());
+
+    return QSize(metrics.width('X') * WIDTH, metrics.height() * (HEIGHT + 1));
+}
+
+//![2]
+void Window::buildMachine()
+{
+    machine = new QStateMachine;
+
+    QState *inputState = new QState(machine);
+    inputState->assignProperty(this, "status", "Move the rogue with 2, 4, 6, and 8");
+
+    MovementTransition *transition = new MovementTransition(this);
+    inputState->addTransition(transition);
+//![2]
+
+//![3]
+    QState *quitState = new QState(machine);
+    quitState->assignProperty(this, "status", "Really quit(y/n)?"); 
+
+    QKeyEventTransition *yesTransition = new
+        QKeyEventTransition(this, QEvent::KeyPress, Qt::Key_Y);
+    yesTransition->setTargetState(new QFinalState(machine));
+    quitState->addTransition(yesTransition);
+
+    QKeyEventTransition *noTransition =
+        new QKeyEventTransition(this, QEvent::KeyPress, Qt::Key_N);
+    noTransition->setTargetState(inputState);
+    quitState->addTransition(noTransition);
+//![3]
+
+//![4]
+    QKeyEventTransition *quitTransition =
+        new QKeyEventTransition(this, QEvent::KeyPress, Qt::Key_Q);
+    quitTransition->setTargetState(quitState);
+    inputState->addTransition(quitTransition);
+//![4]
+
+//![5]
+    machine->setInitialState(inputState);
+
+    connect(machine, SIGNAL(finished()), qApp, SLOT(quit()));
+
+    machine->start();
+}
+//![5]
+
+void Window::movePlayer(Direction direction)
+{
+    switch (direction) {
+        case Left:
+            if (map[pX - 1][pY] != '#')
+                --pX;            
+            break;
+        case Right:
+            if (map[pX + 1][pY] != '#')
+                ++pX;
+            break;
+        case Up:
+            if (map[pX][pY - 1] != '#')
+                --pY;
+            break;
+        case Down:
+            if (map[pX][pY + 1] != '#')
+                ++pY;
+            break;        
+    }
+    repaint();
+}
+
+void Window::setupMap()
+{
+    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
+
+    for (int x = 0; x < WIDTH; ++x)
+        for (int y = 0; y < HEIGHT; ++y) {
+        if (x == 0 || x == WIDTH - 1 || y == 0 || y == HEIGHT - 1 || qrand() % 40 == 0)
+            map[x][y] = '#';
+        else
+            map[x][y] = '.';
+    }
+}
+
diff --git a/examples/statemachine/rogue/window.h b/examples/statemachine/rogue/window.h
new file mode 100644
index 0000000000..025ec79600
--- /dev/null
+++ b/examples/statemachine/rogue/window.h
@@ -0,0 +1,90 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef WINDOW_H
+#define WINDOW_H
+
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+class QState;
+class QStateMachine;
+class QTransition;
+QT_END_NAMESPACE
+
+#define WIDTH 35
+#define HEIGHT 20
+
+//![0]
+class Window : public QWidget
+{
+    Q_OBJECT
+    Q_PROPERTY(QString status READ status WRITE setStatus)
+
+public:
+    enum Direction { Up, Down, Left, Right };
+
+    Window();
+
+    void movePlayer(Direction direction);
+    void setStatus(const QString &status);
+    QString status() const;
+
+    QSize sizeHint() const;
+
+protected:
+    void paintEvent(QPaintEvent *event);
+//![0]
+
+//![1]
+private:
+    void buildMachine();
+    void setupMap();
+
+    QChar map[WIDTH][HEIGHT];
+    int pX, pY;
+
+    QStateMachine *machine;
+    QString myStatus;
+};
+//![1]
+
+#endif
+
diff --git a/examples/statemachine/statemachine.pro b/examples/statemachine/statemachine.pro
new file mode 100644
index 0000000000..e5b8b75705
--- /dev/null
+++ b/examples/statemachine/statemachine.pro
@@ -0,0 +1,18 @@
+TEMPLATE      = subdirs
+SUBDIRS       = \
+                factorial \
+                pingpong
+
+!contains(QT_CONFIG, no-gui) {
+    SUBDIRS +=  \
+                eventtransitions \
+                rogue \
+                trafficlight \
+                twowaybutton
+}
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS statemachine.pro README
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine
+INSTALLS += target sources
diff --git a/examples/statemachine/trafficlight/main.cpp b/examples/statemachine/trafficlight/main.cpp
new file mode 100644
index 0000000000..23cd34833a
--- /dev/null
+++ b/examples/statemachine/trafficlight/main.cpp
@@ -0,0 +1,184 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+//! [0]
+class LightWidget : public QWidget
+{
+    Q_OBJECT
+    Q_PROPERTY(bool on READ isOn WRITE setOn)
+public:
+    LightWidget(const QColor &color, QWidget *parent = 0)
+        : QWidget(parent), m_color(color), m_on(false) {}
+
+    bool isOn() const
+        { return m_on; }
+    void setOn(bool on)
+    {
+        if (on == m_on)
+            return;
+        m_on = on;
+        update();
+    }
+
+public slots:
+    void turnOff() { setOn(false); }
+    void turnOn() { setOn(true); }
+
+protected:
+    virtual void paintEvent(QPaintEvent *)
+    {
+        if (!m_on)
+            return;
+        QPainter painter(this);
+        painter.setRenderHint(QPainter::Antialiasing);
+        painter.setBrush(m_color);
+        painter.drawEllipse(0, 0, width(), height());
+    }
+
+private:
+    QColor m_color;
+    bool m_on;
+};
+//! [0]
+
+//! [1]
+class TrafficLightWidget : public QWidget
+{
+public:
+    TrafficLightWidget(QWidget *parent = 0)
+        : QWidget(parent)
+    {
+        QVBoxLayout *vbox = new QVBoxLayout(this);
+        m_red = new LightWidget(Qt::red);
+        vbox->addWidget(m_red);
+        m_yellow = new LightWidget(Qt::yellow);
+        vbox->addWidget(m_yellow);
+        m_green = new LightWidget(Qt::green);
+        vbox->addWidget(m_green);
+        QPalette pal = palette();
+        pal.setColor(QPalette::Background, Qt::black);
+        setPalette(pal);
+        setAutoFillBackground(true);
+    }
+
+    LightWidget *redLight() const
+        { return m_red; }
+    LightWidget *yellowLight() const
+        { return m_yellow; }
+    LightWidget *greenLight() const
+        { return m_green; }
+
+private:
+    LightWidget *m_red;
+    LightWidget *m_yellow;
+    LightWidget *m_green;
+};
+//! [1]
+
+//! [2]
+QState *createLightState(LightWidget *light, int duration, QState *parent = 0)
+{
+    QState *lightState = new QState(parent);
+    QTimer *timer = new QTimer(lightState);
+    timer->setInterval(duration);
+    timer->setSingleShot(true);
+    QState *timing = new QState(lightState);
+    QObject::connect(timing, SIGNAL(entered()), light, SLOT(turnOn()));
+    QObject::connect(timing, SIGNAL(entered()), timer, SLOT(start()));
+    QObject::connect(timing, SIGNAL(exited()), light, SLOT(turnOff()));
+    QFinalState *done = new QFinalState(lightState);
+    timing->addTransition(timer, SIGNAL(timeout()), done);
+    lightState->setInitialState(timing);
+    return lightState;
+}
+//! [2]
+
+//! [3]
+class TrafficLight : public QWidget
+{
+public:
+    TrafficLight(QWidget *parent = 0)
+        : QWidget(parent)
+    {
+        QVBoxLayout *vbox = new QVBoxLayout(this);
+        TrafficLightWidget *widget = new TrafficLightWidget();
+        vbox->addWidget(widget);
+        vbox->setMargin(0);
+
+        QStateMachine *machine = new QStateMachine(this);
+        QState *redGoingYellow = createLightState(widget->redLight(), 3000);
+        redGoingYellow->setObjectName("redGoingYellow");
+        QState *yellowGoingGreen = createLightState(widget->yellowLight(), 1000);
+        yellowGoingGreen->setObjectName("yellowGoingGreen");
+        redGoingYellow->addTransition(redGoingYellow, SIGNAL(finished()), yellowGoingGreen);
+        QState *greenGoingYellow = createLightState(widget->greenLight(), 3000);
+        greenGoingYellow->setObjectName("greenGoingYellow");
+        yellowGoingGreen->addTransition(yellowGoingGreen, SIGNAL(finished()), greenGoingYellow);
+        QState *yellowGoingRed = createLightState(widget->yellowLight(), 1000);
+        yellowGoingRed->setObjectName("yellowGoingRed");
+        greenGoingYellow->addTransition(greenGoingYellow, SIGNAL(finished()), yellowGoingRed);
+        yellowGoingRed->addTransition(yellowGoingRed, SIGNAL(finished()), redGoingYellow);
+
+        machine->addState(redGoingYellow);
+        machine->addState(yellowGoingGreen);
+        machine->addState(greenGoingYellow);
+        machine->addState(yellowGoingRed);
+        machine->setInitialState(redGoingYellow);
+        machine->start();
+    }
+};
+//! [3]
+
+//! [4]
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    TrafficLight widget;
+    widget.resize(110, 300);
+    widget.show();
+
+    return app.exec();
+}
+//! [4]
+
+#include "main.moc"
diff --git a/examples/statemachine/trafficlight/trafficlight.pro b/examples/statemachine/trafficlight/trafficlight.pro
new file mode 100644
index 0000000000..f6aab8d6e5
--- /dev/null
+++ b/examples/statemachine/trafficlight/trafficlight.pro
@@ -0,0 +1,7 @@
+SOURCES = main.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/trafficlight
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS trafficlight.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/trafficlight
+INSTALLS += target sources
diff --git a/examples/statemachine/twowaybutton/main.cpp b/examples/statemachine/twowaybutton/main.cpp
new file mode 100644
index 0000000000..6b9ce1fe55
--- /dev/null
+++ b/examples/statemachine/twowaybutton/main.cpp
@@ -0,0 +1,81 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+//! [0]
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+    QPushButton button;
+    QStateMachine machine;
+//! [0]
+
+//! [1]
+    QState *off = new QState();
+    off->assignProperty(&button, "text", "Off");
+    off->setObjectName("off");
+
+    QState *on = new QState();
+    on->setObjectName("on");
+    on->assignProperty(&button, "text", "On");
+//! [1]
+
+//! [2]
+    off->addTransition(&button, SIGNAL(clicked()), on);
+    on->addTransition(&button, SIGNAL(clicked()), off);
+//! [2]
+
+//! [3]
+    machine.addState(off);
+    machine.addState(on);
+//! [3]
+
+//! [4]
+    machine.setInitialState(off);
+    machine.start();
+//! [4]
+
+//! [5]
+    button.resize(100, 50);
+    button.show();
+    return app.exec();
+}
+//! [5]
diff --git a/examples/statemachine/twowaybutton/twowaybutton.pro b/examples/statemachine/twowaybutton/twowaybutton.pro
new file mode 100644
index 0000000000..212ba501d7
--- /dev/null
+++ b/examples/statemachine/twowaybutton/twowaybutton.pro
@@ -0,0 +1,7 @@
+SOURCES = main.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/twowaybutton
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS twowaybutton.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/statemachine/twowaybutton
+INSTALLS += target sources