Initial import of statemachine branch from the old kinetic repository

17 files changed, 965 insertions, 0 deletions

diff --git a/examples/ipc/README b/examples/ipc/README
new file mode 100644
index 0000000..71e2f46
--- /dev/null
+++ b/examples/ipc/README
@@ -0,0 +1,35 @@
+These examples demonstrate IPC support in Qt.
+
+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/ipc/ipc.pro b/examples/ipc/ipc.pro
new file mode 100644
index 0000000..0698f89
--- /dev/null
+++ b/examples/ipc/ipc.pro
@@ -0,0 +1,8 @@
+TEMPLATE      = subdirs
+SUBDIRS       = sharedmemory 
+!wince*: SUBDIRS += localfortuneserver localfortuneclient
+
+# install
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS ipc.pro README
+sources.path = $$[QT_INSTALL_EXAMPLES]/ipc
+INSTALLS += sources
diff --git a/examples/ipc/localfortuneclient/client.cpp b/examples/ipc/localfortuneclient/client.cpp
new file mode 100644
index 0000000..2edbcc3
--- /dev/null
+++ b/examples/ipc/localfortuneclient/client.cpp
@@ -0,0 +1,153 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtNetwork>
+
+#include "client.h"
+
+Client::Client(QWidget *parent)
+    : QDialog(parent)
+{
+    hostLabel = new QLabel(tr("&Server name:"));
+    hostLineEdit = new QLineEdit("fortune");
+
+    hostLabel->setBuddy(hostLineEdit);
+
+    statusLabel = new QLabel(tr("This examples requires that you run the "
+                                "Fortune Server example as well."));
+
+    getFortuneButton = new QPushButton(tr("Get Fortune"));
+    getFortuneButton->setDefault(true);
+
+    quitButton = new QPushButton(tr("Quit"));
+
+    buttonBox = new QDialogButtonBox;
+    buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole);
+    buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
+
+    socket = new QLocalSocket(this);
+
+    connect(hostLineEdit, SIGNAL(textChanged(const QString &)),
+            this, SLOT(enableGetFortuneButton()));
+    connect(getFortuneButton, SIGNAL(clicked()),
+            this, SLOT(requestNewFortune()));
+    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
+    connect(socket, SIGNAL(readyRead()), this, SLOT(readFortune()));
+    connect(socket, SIGNAL(error(QLocalSocket::LocalSocketError)),
+            this, SLOT(displayError(QLocalSocket::LocalSocketError)));
+
+    QGridLayout *mainLayout = new QGridLayout;
+    mainLayout->addWidget(hostLabel, 0, 0);
+    mainLayout->addWidget(hostLineEdit, 0, 1);
+    mainLayout->addWidget(statusLabel, 2, 0, 1, 2);
+    mainLayout->addWidget(buttonBox, 3, 0, 1, 2);
+    setLayout(mainLayout);
+
+    setWindowTitle(tr("Fortune Client"));
+    hostLineEdit->setFocus();
+}
+
+void Client::requestNewFortune()
+{
+    getFortuneButton->setEnabled(false);
+    blockSize = 0;
+    socket->abort();
+    socket->connectToServer(hostLineEdit->text());
+}
+
+void Client::readFortune()
+{
+    QDataStream in(socket);
+    in.setVersion(QDataStream::Qt_4_0);
+
+    if (blockSize == 0) {
+        if (socket->bytesAvailable() < (int)sizeof(quint16))
+            return;
+        in >> blockSize;
+    }
+
+    if (in.atEnd())
+        return;
+
+    QString nextFortune;
+    in >> nextFortune;
+
+    if (nextFortune == currentFortune) {
+        QTimer::singleShot(0, this, SLOT(requestNewFortune()));
+        return;
+    }
+
+    currentFortune = nextFortune;
+    statusLabel->setText(currentFortune);
+    getFortuneButton->setEnabled(true);
+}
+
+void Client::displayError(QLocalSocket::LocalSocketError socketError)
+{
+    switch (socketError) {
+    case QLocalSocket::ServerNotFoundError:
+        QMessageBox::information(this, tr("Fortune Client"),
+                                 tr("The host was not found. Please check the "
+                                    "host name and port settings."));
+        break;
+    case QLocalSocket::ConnectionRefusedError:
+        QMessageBox::information(this, tr("Fortune Client"),
+                                 tr("The connection was refused by the peer. "
+                                    "Make sure the fortune server is running, "
+                                    "and check that the host name and port "
+                                    "settings are correct."));
+        break;
+    case QLocalSocket::PeerClosedError:
+        break;
+    default:
+        QMessageBox::information(this, tr("Fortune Client"),
+                                 tr("The following error occurred: %1.")
+                                 .arg(socket->errorString()));
+    }
+
+    getFortuneButton->setEnabled(true);
+}
+
+void Client::enableGetFortuneButton()
+{
+    getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty());
+}
diff --git a/examples/ipc/localfortuneclient/client.h b/examples/ipc/localfortuneclient/client.h
new file mode 100644
index 0000000..4dbdeb1
--- /dev/null
+++ b/examples/ipc/localfortuneclient/client.h
@@ -0,0 +1,82 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CLIENT_H
+#define CLIENT_H
+
+#include <QDialog>
+#include <qlocalsocket.h>
+
+QT_BEGIN_NAMESPACE
+class QDialogButtonBox;
+class QLabel;
+class QLineEdit;
+class QPushButton;
+class QLocalSocket;
+QT_END_NAMESPACE
+
+class Client : public QDialog
+{
+    Q_OBJECT
+
+public:
+    Client(QWidget *parent = 0);
+
+private slots:
+    void requestNewFortune();
+    void readFortune();
+    void displayError(QLocalSocket::LocalSocketError socketError);
+    void enableGetFortuneButton();
+
+private:
+    QLabel *hostLabel;
+    QLineEdit *hostLineEdit;
+    QLabel *statusLabel;
+    QPushButton *getFortuneButton;
+    QPushButton *quitButton;
+    QDialogButtonBox *buttonBox;
+
+    QLocalSocket *socket;
+    QString currentFortune;
+    quint16 blockSize;
+};
+
+#endif
diff --git a/examples/ipc/localfortuneclient/localfortuneclient.pro b/examples/ipc/localfortuneclient/localfortuneclient.pro
new file mode 100644
index 0000000..906cc8a
--- /dev/null
+++ b/examples/ipc/localfortuneclient/localfortuneclient.pro
@@ -0,0 +1,12 @@
+HEADERS       = client.h
+SOURCES       = client.cpp \
+                main.cpp
+QT           += network
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/ipc/localfortuneclient
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS localfortuneclient.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/ipc/localfortuneclient
+INSTALLS += target sources
+
+
diff --git a/examples/ipc/localfortuneclient/main.cpp b/examples/ipc/localfortuneclient/main.cpp
new file mode 100644
index 0000000..11dcbc6
--- /dev/null
+++ b/examples/ipc/localfortuneclient/main.cpp
@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QApplication>
+
+#include "client.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    Client client;
+    client.show();
+    return client.exec();
+}
diff --git a/examples/ipc/localfortuneserver/localfortuneserver.pro b/examples/ipc/localfortuneserver/localfortuneserver.pro
new file mode 100644
index 0000000..fca9a0a
--- /dev/null
+++ b/examples/ipc/localfortuneserver/localfortuneserver.pro
@@ -0,0 +1,12 @@
+HEADERS       = server.h
+SOURCES       = server.cpp \
+                main.cpp
+QT           += network
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/ipc/localfortuneserver
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS localfortuneserver.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/ipc/localfortuneserver
+INSTALLS += target sources
+
+
diff --git a/examples/ipc/localfortuneserver/main.cpp b/examples/ipc/localfortuneserver/main.cpp
new file mode 100644
index 0000000..b505c44
--- /dev/null
+++ b/examples/ipc/localfortuneserver/main.cpp
@@ -0,0 +1,56 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QApplication>
+#include <QtCore>
+
+#include <stdlib.h>
+
+#include "server.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    Server server;
+    server.show();
+    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
+    return server.exec();
+}
diff --git a/examples/ipc/localfortuneserver/server.cpp b/examples/ipc/localfortuneserver/server.cpp
new file mode 100644
index 0000000..96a2663
--- /dev/null
+++ b/examples/ipc/localfortuneserver/server.cpp
@@ -0,0 +1,111 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtNetwork>
+
+#include <stdlib.h>
+
+#include "server.h"
+#include <qlocalserver.h>
+#include <qlocalsocket.h>
+
+Server::Server(QWidget *parent)
+    : QDialog(parent)
+{
+    statusLabel = new QLabel;
+    quitButton = new QPushButton(tr("Quit"));
+    quitButton->setAutoDefault(false);
+
+    server = new QLocalServer(this);
+    if (!server->listen("fortune")) {
+        QMessageBox::critical(this, tr("Fortune Server"),
+                              tr("Unable to start the server: %1.")
+                              .arg(server->errorString()));
+        close();
+        return;
+    }
+
+    statusLabel->setText(tr("The server is running.\n"
+                            "Run the Fortune Client example now."));
+
+    fortunes << tr("You've been leading a dog's life. Stay off the furniture.")
+             << tr("You've got to think about tomorrow.")
+             << tr("You will be surprised by a loud noise.")
+             << tr("You will feel hungry again in another hour.")
+             << tr("You might have mail.")
+             << tr("You cannot kill time without injuring eternity.")
+             << tr("Computers are not intelligent. They only think they are.");
+
+    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
+    connect(server, SIGNAL(newConnection()), this, SLOT(sendFortune()));
+
+    QHBoxLayout *buttonLayout = new QHBoxLayout;
+    buttonLayout->addStretch(1);
+    buttonLayout->addWidget(quitButton);
+    buttonLayout->addStretch(1);
+
+    QVBoxLayout *mainLayout = new QVBoxLayout;
+    mainLayout->addWidget(statusLabel);
+    mainLayout->addLayout(buttonLayout);
+    setLayout(mainLayout);
+
+    setWindowTitle(tr("Fortune Server"));
+}
+
+void Server::sendFortune()
+{
+    QByteArray block;
+    QDataStream out(&block, QIODevice::WriteOnly);
+    out.setVersion(QDataStream::Qt_4_0);
+    out << (quint16)0;
+    out << fortunes.at(qrand() % fortunes.size());
+    out.device()->seek(0);
+    out << (quint16)(block.size() - sizeof(quint16));
+
+    QLocalSocket *clientConnection = server->nextPendingConnection();
+    connect(clientConnection, SIGNAL(disconnected()),
+            clientConnection, SLOT(deleteLater()));
+
+    clientConnection->write(block);
+    clientConnection->flush();
+    clientConnection->disconnectFromServer();
+}
diff --git a/examples/ipc/localfortuneserver/server.h b/examples/ipc/localfortuneserver/server.h
new file mode 100644
index 0000000..7198fd9
--- /dev/null
+++ b/examples/ipc/localfortuneserver/server.h
@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef SERVER_H
+#define SERVER_H
+
+#include <QDialog>
+
+QT_BEGIN_NAMESPACE
+class QLabel;
+class QPushButton;
+class QLocalServer;
+QT_END_NAMESPACE
+
+class Server : public QDialog
+{
+    Q_OBJECT
+
+public:
+    Server(QWidget *parent = 0);
+
+private slots:
+    void sendFortune();
+
+private:
+    QLabel *statusLabel;
+    QPushButton *quitButton;
+    QLocalServer *server;
+    QStringList fortunes;
+};
+
+#endif
diff --git a/examples/ipc/sharedmemory/dialog.cpp b/examples/ipc/sharedmemory/dialog.cpp
new file mode 100644
index 0000000..245a4a1
--- /dev/null
+++ b/examples/ipc/sharedmemory/dialog.cpp
@@ -0,0 +1,189 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "dialog.h"
+#include <QFileDialog>
+#include <QBuffer>
+#include <QtCore/QDebug>
+
+/*!
+  \class Dialog
+
+  \brief This class is a simple example of how to use QSharedMemory.
+
+  It is a simple dialog that presents a few buttons. To compile the
+  example, run make in qt/examples/ipc. Then run the executable twice
+  to create two processes running the dialog. In one of the processes,
+  press the button to load an image into a shared memory segment, and
+  then select an image file to load. Once the first process has loaded
+  and displayed the image, in the second process, press the button to
+  read the same image from shared memory. The second process displays
+  the same image loaded from its new loaction in shared memory.
+*/
+
+/*!
+  The class contains a data member \l {QSharedMemory} {sharedMemory},
+  which is initialized with the key "QSharedMemoryExample" to force
+  all instances of Dialog to access the same shared memory segment.
+  The constructor also connects the clicked() signal from each of the
+  three dialog buttons to the slot function appropriate for handling
+  each button.
+*/
+//! [0]
+Dialog::Dialog(QWidget *parent)
+  : QDialog(parent), sharedMemory("QSharedMemoryExample")
+{
+    ui.setupUi(this);
+    connect(ui.loadFromFileButton, SIGNAL(clicked()), SLOT(loadFromFile()));
+    connect(ui.loadFromSharedMemoryButton,
+	    SIGNAL(clicked()),
+	    SLOT(loadFromMemory()));
+    setWindowTitle(tr("SharedMemory Example"));
+}
+//! [0]
+
+/*!
+  This slot function is called when the \tt {Load Image From File...}
+  button is pressed on the firs Dialog process. First, it tests
+  whether the process is already connected to a shared memory segment
+  and, if so, detaches from that segment. This ensures that we always
+  start the example from the beginning if we run it multiple times
+  with the same two Dialog processes. After detaching from an existing
+  shared memory segment, the user is prompted to select an image file.
+  The selected file is loaded into a QImage. The QImage is displayed
+  in the Dialog and streamed into a QBuffer with a QDataStream.
+
+  Next, it gets a new shared memory segment from the system big enough
+  to hold the image data in the QBuffer, and it locks the segment to
+  prevent the second Dialog process from accessing it. Then it copies
+  the image from the QBuffer into the shared memory segment. Finally,
+  it unlocks the shared memory segment so the second Dialog process
+  can access it.
+
+  After this function runs, the user is expected to press the \tt
+  {Load Image from Shared Memory} button on the second Dialog process.
+
+  \sa loadFromMemory()
+ */
+//! [1]
+void Dialog::loadFromFile()
+{
+    if (sharedMemory.isAttached())
+        detach();
+
+    ui.label->setText(tr("Select an image file"));
+    QString fileName = QFileDialog::getOpenFileName(0, QString(), QString(),
+                                        tr("Images (*.png *.xpm *.jpg)"));
+    QImage image;
+    if (!image.load(fileName)) {
+        ui.label->setText(tr("Selected file is not an image, please select another."));
+        return;
+    }
+    ui.label->setPixmap(QPixmap::fromImage(image));
+//! [1] //! [2]
+
+    // load into shared memory
+    QBuffer buffer;
+    buffer.open(QBuffer::ReadWrite);
+    QDataStream out(&buffer);
+    out << image;
+    int size = buffer.size();
+
+    if (!sharedMemory.create(size)) {
+        ui.label->setText(tr("Unable to create shared memory segment."));
+        return;
+    }
+    sharedMemory.lock();
+    char *to = (char*)sharedMemory.data();
+    const char *from = buffer.data().data();
+    memcpy(to, from, qMin(sharedMemory.size(), size));
+    sharedMemory.unlock();
+}
+//! [2]
+
+/*!
+  This slot function is called in the second Dialog process, when the
+  user presses the \tt {Load Image from Shared Memory} button. First,
+  it attaches the process to the shared memory segment created by the
+  first Dialog process. Then it locks the segment for exclusive
+  access, copies the image data from the segment into a QBuffer, and
+  streams the QBuffer into a QImage. Then it unlocks the shared memory
+  segment, detaches from it, and finally displays the QImage in the
+  Dialog.
+
+  \sa loadFromFile()
+ */
+//! [3]
+void Dialog::loadFromMemory()
+{
+    if (!sharedMemory.attach()) {
+        ui.label->setText(tr("Unable to attach to shared memory segment.\n" \
+			     "Load an image first."));
+        return;
+    }
+
+    QBuffer buffer;
+    QDataStream in(&buffer);
+    QImage image;
+
+    sharedMemory.lock();
+    buffer.setData((char*)sharedMemory.constData(), sharedMemory.size());
+    buffer.open(QBuffer::ReadOnly);
+    in >> image;
+    sharedMemory.unlock();
+
+    sharedMemory.detach();
+    ui.label->setPixmap(QPixmap::fromImage(image));
+}
+//! [3]
+
+/*!
+  This private function is called by the destructor to detach the
+  process from its shared memory segment. When the last process
+  detaches from a shared memory segment, the system releases the
+  shared memory.
+ */
+void Dialog::detach()
+{
+    if (!sharedMemory.detach()) 
+        ui.label->setText(tr("Unable to detach from shared memory."));
+}
+
diff --git a/examples/ipc/sharedmemory/dialog.h b/examples/ipc/sharedmemory/dialog.h
new file mode 100644
index 0000000..a0c84b6
--- /dev/null
+++ b/examples/ipc/sharedmemory/dialog.h
@@ -0,0 +1,71 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef DIALOG_H
+#define DIALOG_H
+
+#include <qdialog.h>
+#include <qsharedmemory.h>
+#include "ui_dialog.h"
+
+//! [0]
+class Dialog : public QDialog
+{
+    Q_OBJECT
+
+  public:
+    Dialog(QWidget *parent = 0);
+
+  public slots:
+    void loadFromFile();
+    void loadFromMemory();
+
+ private:
+    void detach();
+
+  private:
+    Ui::Dialog ui;
+    QSharedMemory sharedMemory;
+};
+//! [0]
+
+#endif
+
diff --git a/examples/ipc/sharedmemory/dialog.ui b/examples/ipc/sharedmemory/dialog.ui
new file mode 100644
index 0000000..e99d6fb
--- /dev/null
+++ b/examples/ipc/sharedmemory/dialog.ui
@@ -0,0 +1,47 @@
+<ui version="4.0" >
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog" >
+  <property name="geometry" >
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>451</width>
+    <height>322</height>
+   </rect>
+  </property>
+  <property name="windowTitle" >
+   <string>Dialog</string>
+  </property>
+  <layout class="QGridLayout" >
+   <item row="0" column="0" >
+    <widget class="QPushButton" name="loadFromFileButton" >
+     <property name="text" >
+      <string>Load Image From File...</string>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="0" >
+    <widget class="QLabel" name="label" >
+     <property name="text" >
+      <string>Launch two of these dialogs.  In the first, press the top button and load an image from a file.  In the second, press the bottom button and display the loaded image from shared memory.</string>
+     </property>
+     <property name="alignment" >
+      <set>Qt::AlignCenter</set>
+     </property>
+     <property name="wordWrap" >
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+   <item row="2" column="0" >
+    <widget class="QPushButton" name="loadFromSharedMemoryButton" >
+     <property name="text" >
+      <string>Display Image From Shared Memory</string>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/examples/ipc/sharedmemory/image.png b/examples/ipc/sharedmemory/image.png
new file mode 100644
index 0000000..dd93453
--- /dev/null
+++ b/examples/ipc/sharedmemory/image.png
diff --git a/examples/ipc/sharedmemory/main.cpp b/examples/ipc/sharedmemory/main.cpp
new file mode 100644
index 0000000..533efeb
--- /dev/null
+++ b/examples/ipc/sharedmemory/main.cpp
@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QApplication>
+#include "dialog.h"
+
+//! [0]
+int main(int argc, char *argv[])
+{
+    QApplication application(argc, argv);
+    Dialog dialog;
+    dialog.show();
+    return application.exec();
+}
+//! [0]
+
diff --git a/examples/ipc/sharedmemory/qt.png b/examples/ipc/sharedmemory/qt.png
new file mode 100644
index 0000000..60ef558
--- /dev/null
+++ b/examples/ipc/sharedmemory/qt.png
diff --git a/examples/ipc/sharedmemory/sharedmemory.pro b/examples/ipc/sharedmemory/sharedmemory.pro
new file mode 100644
index 0000000..4833090
--- /dev/null
+++ b/examples/ipc/sharedmemory/sharedmemory.pro
@@ -0,0 +1,13 @@
+SOURCES += main.cpp \
+           dialog.cpp 
+
+HEADERS += dialog.h
+
+# Forms and resources
+FORMS += dialog.ui
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/ipc/sharedmemory
+sources.files = $$SOURCES $$HEADERS $$FORMS $$RESOURCES *.pro *.png
+sources.path = $$[QT_INSTALL_EXAMPLES]/ipc/sharedmemory
+INSTALLS += target sources