Long live Qt 4.5!

54 files changed, 3512 insertions, 0 deletions

diff --git a/examples/mainwindows/README b/examples/mainwindows/README
new file mode 100644
index 0000000..15a6c23
--- /dev/null
+++ b/examples/mainwindows/README
@@ -0,0 +1,40 @@
+All the standard features of application main windows are provided by Qt.
+
+Main windows can have pull down menus, tool bars, and dock windows. These
+separate forms of user input are unified in an integrated action system that
+also supports keyboard shortcuts and accelerator keys in menu items.
+
+
+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/mainwindows/application/application.pro b/examples/mainwindows/application/application.pro
new file mode 100644
index 0000000..ad1168a
--- /dev/null
+++ b/examples/mainwindows/application/application.pro
@@ -0,0 +1,12 @@
+HEADERS       = mainwindow.h
+SOURCES       = main.cpp \
+                mainwindow.cpp
+#! [0]
+RESOURCES     = application.qrc
+#! [0]
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/application
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS application.pro images
+sources.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/application
+INSTALLS += target sources
diff --git a/examples/mainwindows/application/application.qrc b/examples/mainwindows/application/application.qrc
new file mode 100644
index 0000000..0a776fa
--- /dev/null
+++ b/examples/mainwindows/application/application.qrc
@@ -0,0 +1,10 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>images/copy.png</file>
+    <file>images/cut.png</file>
+    <file>images/new.png</file>
+    <file>images/open.png</file>
+    <file>images/paste.png</file>
+    <file>images/save.png</file>
+</qresource>
+</RCC>
diff --git a/examples/mainwindows/application/images/copy.png b/examples/mainwindows/application/images/copy.png
new file mode 100644
index 0000000..2aeb282
--- /dev/null
+++ b/examples/mainwindows/application/images/copy.png
diff --git a/examples/mainwindows/application/images/cut.png b/examples/mainwindows/application/images/cut.png
new file mode 100644
index 0000000..54638e9
--- /dev/null
+++ b/examples/mainwindows/application/images/cut.png
diff --git a/examples/mainwindows/application/images/new.png b/examples/mainwindows/application/images/new.png
new file mode 100644
index 0000000..12131b0
--- /dev/null
+++ b/examples/mainwindows/application/images/new.png
diff --git a/examples/mainwindows/application/images/open.png b/examples/mainwindows/application/images/open.png
new file mode 100644
index 0000000..45fa288
--- /dev/null
+++ b/examples/mainwindows/application/images/open.png
diff --git a/examples/mainwindows/application/images/paste.png b/examples/mainwindows/application/images/paste.png
new file mode 100644
index 0000000..c14425c
--- /dev/null
+++ b/examples/mainwindows/application/images/paste.png
diff --git a/examples/mainwindows/application/images/save.png b/examples/mainwindows/application/images/save.png
new file mode 100644
index 0000000..daba865
--- /dev/null
+++ b/examples/mainwindows/application/images/save.png
diff --git a/examples/mainwindows/application/main.cpp b/examples/mainwindows/application/main.cpp
new file mode 100644
index 0000000..0f9d1b2
--- /dev/null
+++ b/examples/mainwindows/application/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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+#include <QApplication>
+
+#include "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    Q_INIT_RESOURCE(application);
+
+    QApplication app(argc, argv);
+    MainWindow mainWin;
+    mainWin.show();
+    return app.exec();
+}
+//! [0]
diff --git a/examples/mainwindows/application/mainwindow.cpp b/examples/mainwindows/application/mainwindow.cpp
new file mode 100644
index 0000000..9a22254
--- /dev/null
+++ b/examples/mainwindows/application/mainwindow.cpp
@@ -0,0 +1,388 @@
+/****************************************************************************
+**
+** 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+#include <QtGui>
+
+#include "mainwindow.h"
+//! [0]
+
+//! [1]
+MainWindow::MainWindow()
+//! [1] //! [2]
+{
+    textEdit = new QPlainTextEdit;
+    setCentralWidget(textEdit);
+
+    createActions();
+    createMenus();
+    createToolBars();
+    createStatusBar();
+
+    readSettings();
+
+    connect(textEdit->document(), SIGNAL(contentsChanged()),
+            this, SLOT(documentWasModified()));
+
+    setCurrentFile("");
+    setUnifiedTitleAndToolBarOnMac(true);
+}
+//! [2]
+
+//! [3]
+void MainWindow::closeEvent(QCloseEvent *event)
+//! [3] //! [4]
+{
+    if (maybeSave()) {
+        writeSettings();
+        event->accept();
+    } else {
+        event->ignore();
+    }
+}
+//! [4]
+
+//! [5]
+void MainWindow::newFile()
+//! [5] //! [6]
+{
+    if (maybeSave()) {
+        textEdit->clear();
+        setCurrentFile("");
+    }
+}
+//! [6]
+
+//! [7]
+void MainWindow::open()
+//! [7] //! [8]
+{
+    if (maybeSave()) {
+        QString fileName = QFileDialog::getOpenFileName(this);
+        if (!fileName.isEmpty())
+            loadFile(fileName);
+    }
+}
+//! [8]
+
+//! [9]
+bool MainWindow::save()
+//! [9] //! [10]
+{
+    if (curFile.isEmpty()) {
+        return saveAs();
+    } else {
+        return saveFile(curFile);
+    }
+}
+//! [10]
+
+//! [11]
+bool MainWindow::saveAs()
+//! [11] //! [12]
+{
+    QString fileName = QFileDialog::getSaveFileName(this);
+    if (fileName.isEmpty())
+        return false;
+
+    return saveFile(fileName);
+}
+//! [12]
+
+//! [13]
+void MainWindow::about()
+//! [13] //! [14]
+{
+   QMessageBox::about(this, tr("About Application"),
+            tr("The <b>Application</b> example demonstrates how to "
+               "write modern GUI applications using Qt, with a menu bar, "
+               "toolbars, and a status bar."));
+}
+//! [14]
+
+//! [15]
+void MainWindow::documentWasModified()
+//! [15] //! [16]
+{
+    setWindowModified(textEdit->document()->isModified());
+}
+//! [16]
+
+//! [17]
+void MainWindow::createActions()
+//! [17] //! [18]
+{
+    newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this);
+    newAct->setShortcuts(QKeySequence::New);
+    newAct->setStatusTip(tr("Create a new file"));
+    connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
+
+//! [19]
+    openAct = new QAction(QIcon(":/images/open.png"), tr("&Open..."), this);
+    openAct->setShortcuts(QKeySequence::Open);
+    openAct->setStatusTip(tr("Open an existing file"));
+    connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
+//! [18] //! [19]
+
+    saveAct = new QAction(QIcon(":/images/save.png"), tr("&Save"), this);
+    saveAct->setShortcuts(QKeySequence::Save);
+    saveAct->setStatusTip(tr("Save the document to disk"));
+    connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
+
+    saveAsAct = new QAction(tr("Save &As..."), this);
+    saveAsAct->setShortcuts(QKeySequence::SaveAs);
+    saveAsAct->setStatusTip(tr("Save the document under a new name"));
+    connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
+
+//! [20]
+    exitAct = new QAction(tr("E&xit"), this);
+    exitAct->setShortcut(tr("Ctrl+Q"));
+//! [20]
+    exitAct->setStatusTip(tr("Exit the application"));
+    connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
+
+//! [21]
+    cutAct = new QAction(QIcon(":/images/cut.png"), tr("Cu&t"), this);
+//! [21]
+    cutAct->setShortcuts(QKeySequence::Cut);
+    cutAct->setStatusTip(tr("Cut the current selection's contents to the "
+                            "clipboard"));
+    connect(cutAct, SIGNAL(triggered()), textEdit, SLOT(cut()));
+
+    copyAct = new QAction(QIcon(":/images/copy.png"), tr("&Copy"), this);
+    copyAct->setShortcuts(QKeySequence::Copy);
+    copyAct->setStatusTip(tr("Copy the current selection's contents to the "
+                             "clipboard"));
+    connect(copyAct, SIGNAL(triggered()), textEdit, SLOT(copy()));
+
+    pasteAct = new QAction(QIcon(":/images/paste.png"), tr("&Paste"), this);
+    pasteAct->setShortcuts(QKeySequence::Paste);
+    pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
+                              "selection"));
+    connect(pasteAct, SIGNAL(triggered()), textEdit, SLOT(paste()));
+
+    aboutAct = new QAction(tr("&About"), this);
+    aboutAct->setStatusTip(tr("Show the application's About box"));
+    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+//! [22]
+    aboutQtAct = new QAction(tr("About &Qt"), this);
+    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+//! [22]
+
+//! [23]
+    cutAct->setEnabled(false);
+//! [23] //! [24]
+    copyAct->setEnabled(false);
+    connect(textEdit, SIGNAL(copyAvailable(bool)),
+            cutAct, SLOT(setEnabled(bool)));
+    connect(textEdit, SIGNAL(copyAvailable(bool)),
+            copyAct, SLOT(setEnabled(bool)));
+}
+//! [24]
+
+//! [25] //! [26]
+void MainWindow::createMenus()
+//! [25] //! [27]
+{
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(newAct);
+//! [28]
+    fileMenu->addAction(openAct);
+//! [28]
+    fileMenu->addAction(saveAct);
+//! [26]
+    fileMenu->addAction(saveAsAct);
+    fileMenu->addSeparator();
+    fileMenu->addAction(exitAct);
+
+    editMenu = menuBar()->addMenu(tr("&Edit"));
+    editMenu->addAction(cutAct);
+    editMenu->addAction(copyAct);
+    editMenu->addAction(pasteAct);
+
+    menuBar()->addSeparator();
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+}
+//! [27]
+
+//! [29] //! [30]
+void MainWindow::createToolBars()
+{
+    fileToolBar = addToolBar(tr("File"));
+    fileToolBar->addAction(newAct);
+//! [29] //! [31]
+    fileToolBar->addAction(openAct);
+//! [31]
+    fileToolBar->addAction(saveAct);
+
+    editToolBar = addToolBar(tr("Edit"));
+    editToolBar->addAction(cutAct);
+    editToolBar->addAction(copyAct);
+    editToolBar->addAction(pasteAct);
+}
+//! [30]
+
+//! [32]
+void MainWindow::createStatusBar()
+//! [32] //! [33]
+{
+    statusBar()->showMessage(tr("Ready"));
+}
+//! [33]
+
+//! [34] //! [35]
+void MainWindow::readSettings()
+//! [34] //! [36]
+{
+    QSettings settings("Trolltech", "Application Example");
+    QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
+    QSize size = settings.value("size", QSize(400, 400)).toSize();
+    resize(size);
+    move(pos);
+}
+//! [35] //! [36]
+
+//! [37] //! [38]
+void MainWindow::writeSettings()
+//! [37] //! [39]
+{
+    QSettings settings("Trolltech", "Application Example");
+    settings.setValue("pos", pos());
+    settings.setValue("size", size());
+}
+//! [38] //! [39]
+
+//! [40]
+bool MainWindow::maybeSave()
+//! [40] //! [41]
+{
+    if (textEdit->document()->isModified()) {
+        QMessageBox::StandardButton ret;
+        ret = QMessageBox::warning(this, tr("Application"),
+                     tr("The document has been modified.\n"
+                        "Do you want to save your changes?"),
+                     QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
+        if (ret == QMessageBox::Save)
+            return save();
+        else if (ret == QMessageBox::Cancel)
+            return false;
+    }
+    return true;
+}
+//! [41]
+
+//! [42]
+void MainWindow::loadFile(const QString &fileName)
+//! [42] //! [43]
+{
+    QFile file(fileName);
+    if (!file.open(QFile::ReadOnly | QFile::Text)) {
+        QMessageBox::warning(this, tr("Application"),
+                             tr("Cannot read file %1:\n%2.")
+                             .arg(fileName)
+                             .arg(file.errorString()));
+        return;
+    }
+
+    QTextStream in(&file);
+    QApplication::setOverrideCursor(Qt::WaitCursor);
+    textEdit->setPlainText(in.readAll());
+    QApplication::restoreOverrideCursor();
+
+    setCurrentFile(fileName);
+    statusBar()->showMessage(tr("File loaded"), 2000);
+}
+//! [43]
+
+//! [44]
+bool MainWindow::saveFile(const QString &fileName)
+//! [44] //! [45]
+{
+    QFile file(fileName);
+    if (!file.open(QFile::WriteOnly | QFile::Text)) {
+        QMessageBox::warning(this, tr("Application"),
+                             tr("Cannot write file %1:\n%2.")
+                             .arg(fileName)
+                             .arg(file.errorString()));
+        return false;
+    }
+
+    QTextStream out(&file);
+    QApplication::setOverrideCursor(Qt::WaitCursor);
+    out << textEdit->toPlainText();
+    QApplication::restoreOverrideCursor();
+
+    setCurrentFile(fileName);
+    statusBar()->showMessage(tr("File saved"), 2000);
+    return true;
+}
+//! [45]
+
+//! [46]
+void MainWindow::setCurrentFile(const QString &fileName)
+//! [46] //! [47]
+{
+    curFile = fileName;
+    textEdit->document()->setModified(false);
+    setWindowModified(false);
+
+    QString shownName;
+    if (curFile.isEmpty())
+        shownName = "untitled.txt";
+    else
+        shownName = strippedName(curFile);
+
+    setWindowTitle(tr("%1[*] - %2").arg(shownName).arg(tr("Application")));
+}
+//! [47]
+
+//! [48]
+QString MainWindow::strippedName(const QString &fullFileName)
+//! [48] //! [49]
+{
+    return QFileInfo(fullFileName).fileName();
+}
+//! [49]
diff --git a/examples/mainwindows/application/mainwindow.h b/examples/mainwindows/application/mainwindow.h
new file mode 100644
index 0000000..264be03
--- /dev/null
+++ b/examples/mainwindows/application/mainwindow.h
@@ -0,0 +1,106 @@
+/****************************************************************************
+**
+** 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 MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QMenu;
+class QPlainTextEdit;
+QT_END_NAMESPACE
+
+//! [0]
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+protected:
+    void closeEvent(QCloseEvent *event);
+
+private slots:
+    void newFile();
+    void open();
+    bool save();
+    bool saveAs();
+    void about();
+    void documentWasModified();
+
+private:
+    void createActions();
+    void createMenus();
+    void createToolBars();
+    void createStatusBar();
+    void readSettings();
+    void writeSettings();
+    bool maybeSave();
+    void loadFile(const QString &fileName);
+    bool saveFile(const QString &fileName);
+    void setCurrentFile(const QString &fileName);
+    QString strippedName(const QString &fullFileName);
+
+    QPlainTextEdit *textEdit;
+    QString curFile;
+
+    QMenu *fileMenu;
+    QMenu *editMenu;
+    QMenu *helpMenu;
+    QToolBar *fileToolBar;
+    QToolBar *editToolBar;
+    QAction *newAct;
+    QAction *openAct;
+    QAction *saveAct;
+    QAction *saveAsAct;
+    QAction *exitAct;
+    QAction *cutAct;
+    QAction *copyAct;
+    QAction *pasteAct;
+    QAction *aboutAct;
+    QAction *aboutQtAct;
+};
+//! [0]
+
+#endif
diff --git a/examples/mainwindows/dockwidgets/dockwidgets.pro b/examples/mainwindows/dockwidgets/dockwidgets.pro
new file mode 100644
index 0000000..afc8aaa
--- /dev/null
+++ b/examples/mainwindows/dockwidgets/dockwidgets.pro
@@ -0,0 +1,10 @@
+HEADERS         = mainwindow.h
+SOURCES         = main.cpp \
+                  mainwindow.cpp
+RESOURCES       = dockwidgets.qrc
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/dockwidgets
+sources.files = $$SOURCES $$HEADERS $$RESOURCES dockwidgets.pro images
+sources.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/dockwidgets
+INSTALLS += target sources
diff --git a/examples/mainwindows/dockwidgets/dockwidgets.qrc b/examples/mainwindows/dockwidgets/dockwidgets.qrc
new file mode 100644
index 0000000..968feac
--- /dev/null
+++ b/examples/mainwindows/dockwidgets/dockwidgets.qrc
@@ -0,0 +1,8 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>images/new.png</file>
+    <file>images/print.png</file>
+    <file>images/save.png</file>
+    <file>images/undo.png</file>
+</qresource>
+</RCC>
diff --git a/examples/mainwindows/dockwidgets/images/new.png b/examples/mainwindows/dockwidgets/images/new.png
new file mode 100644
index 0000000..dd795cf
--- /dev/null
+++ b/examples/mainwindows/dockwidgets/images/new.png
diff --git a/examples/mainwindows/dockwidgets/images/print.png b/examples/mainwindows/dockwidgets/images/print.png
new file mode 100644
index 0000000..2afb769
--- /dev/null
+++ b/examples/mainwindows/dockwidgets/images/print.png
diff --git a/examples/mainwindows/dockwidgets/images/save.png b/examples/mainwindows/dockwidgets/images/save.png
new file mode 100644
index 0000000..46eac82
--- /dev/null
+++ b/examples/mainwindows/dockwidgets/images/save.png
diff --git a/examples/mainwindows/dockwidgets/images/undo.png b/examples/mainwindows/dockwidgets/images/undo.png
new file mode 100644
index 0000000..eee23d2
--- /dev/null
+++ b/examples/mainwindows/dockwidgets/images/undo.png
diff --git a/examples/mainwindows/dockwidgets/main.cpp b/examples/mainwindows/dockwidgets/main.cpp
new file mode 100644
index 0000000..f4bed91
--- /dev/null
+++ b/examples/mainwindows/dockwidgets/main.cpp
@@ -0,0 +1,53 @@
+/****************************************************************************
+**
+** 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 "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    Q_INIT_RESOURCE(dockwidgets);
+    MainWindow mainWin;
+    mainWin.show();
+    return app.exec();
+}
diff --git a/examples/mainwindows/dockwidgets/mainwindow.cpp b/examples/mainwindows/dockwidgets/mainwindow.cpp
new file mode 100644
index 0000000..1683034
--- /dev/null
+++ b/examples/mainwindows/dockwidgets/mainwindow.cpp
@@ -0,0 +1,343 @@
+/****************************************************************************
+**
+** 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$
+**
+****************************************************************************/
+
+//! [0]
+#include <QtGui>
+
+#include "mainwindow.h"
+//! [0]
+
+//! [1]
+MainWindow::MainWindow()
+{
+    textEdit = new QTextEdit;
+    setCentralWidget(textEdit);
+
+    createActions();
+    createMenus();
+    createToolBars();
+    createStatusBar();
+    createDockWindows();
+
+    setWindowTitle(tr("Dock Widgets"));
+
+    newLetter();
+    setUnifiedTitleAndToolBarOnMac(true);
+}
+//! [1]
+
+//! [2]
+void MainWindow::newLetter()
+{
+    textEdit->clear();
+
+    QTextCursor cursor(textEdit->textCursor());
+    cursor.movePosition(QTextCursor::Start);
+    QTextFrame *topFrame = cursor.currentFrame();
+    QTextFrameFormat topFrameFormat = topFrame->frameFormat();
+    topFrameFormat.setPadding(16);
+    topFrame->setFrameFormat(topFrameFormat);
+
+    QTextCharFormat textFormat;
+    QTextCharFormat boldFormat;
+    boldFormat.setFontWeight(QFont::Bold);
+    QTextCharFormat italicFormat;
+    italicFormat.setFontItalic(true);
+
+    QTextTableFormat tableFormat;
+    tableFormat.setBorder(1);
+    tableFormat.setCellPadding(16);
+    tableFormat.setAlignment(Qt::AlignRight);
+    cursor.insertTable(1, 1, tableFormat);
+    cursor.insertText("The Firm", boldFormat);
+    cursor.insertBlock();
+    cursor.insertText("321 City Street", textFormat);
+    cursor.insertBlock();
+    cursor.insertText("Industry Park");
+    cursor.insertBlock();
+    cursor.insertText("Some Country");
+    cursor.setPosition(topFrame->lastPosition());
+    cursor.insertText(QDate::currentDate().toString("d MMMM yyyy"), textFormat);
+    cursor.insertBlock();
+    cursor.insertBlock();
+    cursor.insertText("Dear ", textFormat);
+    cursor.insertText("NAME", italicFormat);
+    cursor.insertText(",", textFormat);
+    for (int i = 0; i < 3; ++i)
+        cursor.insertBlock();
+    cursor.insertText(tr("Yours sincerely,"), textFormat);
+    for (int i = 0; i < 3; ++i)
+        cursor.insertBlock();
+    cursor.insertText("The Boss", textFormat);
+    cursor.insertBlock();
+    cursor.insertText("ADDRESS", italicFormat);
+}
+//! [2]
+
+//! [3]
+void MainWindow::print()
+{
+#ifndef QT_NO_PRINTDIALOG
+    QTextDocument *document = textEdit->document();
+    QPrinter printer;
+
+    QPrintDialog *dlg = new QPrintDialog(&printer, this);
+    if (dlg->exec() != QDialog::Accepted)
+        return;
+
+    document->print(&printer);
+
+    statusBar()->showMessage(tr("Ready"), 2000);
+#endif
+}
+//! [3]
+
+//! [4]
+void MainWindow::save()
+{
+    QString fileName = QFileDialog::getSaveFileName(this,
+                        tr("Choose a file name"), ".",
+                        tr("HTML (*.html *.htm)"));
+    if (fileName.isEmpty())
+        return;
+    QFile file(fileName);
+    if (!file.open(QFile::WriteOnly | QFile::Text)) {
+        QMessageBox::warning(this, tr("Dock Widgets"),
+                             tr("Cannot write file %1:\n%2.")
+                             .arg(fileName)
+                             .arg(file.errorString()));
+        return;
+    }
+
+    QTextStream out(&file);
+    QApplication::setOverrideCursor(Qt::WaitCursor);
+    out << textEdit->toHtml();
+    QApplication::restoreOverrideCursor();
+
+    statusBar()->showMessage(tr("Saved '%1'").arg(fileName), 2000);
+}
+//! [4]
+
+//! [5]
+void MainWindow::undo()
+{
+    QTextDocument *document = textEdit->document();
+    document->undo();
+}
+//! [5]
+
+//! [6]
+void MainWindow::insertCustomer(const QString &customer)
+{
+    if (customer.isEmpty())
+        return;
+    QStringList customerList = customer.split(", ");
+    QTextDocument *document = textEdit->document();
+    QTextCursor cursor = document->find("NAME");
+    if (!cursor.isNull()) {
+        cursor.beginEditBlock();
+        cursor.insertText(customerList.at(0));
+        QTextCursor oldcursor = cursor;
+        cursor = document->find("ADDRESS");
+        if (!cursor.isNull()) {
+            for (int i = 1; i < customerList.size(); ++i) {
+                cursor.insertBlock();
+                cursor.insertText(customerList.at(i));
+            }
+            cursor.endEditBlock();
+        }
+        else
+            oldcursor.endEditBlock();
+    }
+}
+//! [6]
+
+//! [7]
+void MainWindow::addParagraph(const QString &paragraph)
+{
+    if (paragraph.isEmpty())
+        return;
+    QTextDocument *document = textEdit->document();
+    QTextCursor cursor = document->find(tr("Yours sincerely,"));
+    if (cursor.isNull())
+        return;
+    cursor.beginEditBlock();
+    cursor.movePosition(QTextCursor::PreviousBlock, QTextCursor::MoveAnchor, 2);
+    cursor.insertBlock();
+    cursor.insertText(paragraph);
+    cursor.insertBlock();
+    cursor.endEditBlock();
+
+}
+//! [7]
+
+void MainWindow::about()
+{
+   QMessageBox::about(this, tr("About Dock Widgets"),
+            tr("The <b>Dock Widgets</b> example demonstrates how to "
+               "use Qt's dock widgets. You can enter your own text, "
+               "click a customer to add a customer name and "
+               "address, and click standard paragraphs to add them."));
+}
+
+void MainWindow::createActions()
+{
+    newLetterAct = new QAction(QIcon(":/images/new.png"), tr("&New Letter"),
+                               this);
+    newLetterAct->setShortcuts(QKeySequence::New);
+    newLetterAct->setStatusTip(tr("Create a new form letter"));
+    connect(newLetterAct, SIGNAL(triggered()), this, SLOT(newLetter()));
+
+    saveAct = new QAction(QIcon(":/images/save.png"), tr("&Save..."), this);
+    saveAct->setShortcuts(QKeySequence::Save);
+    saveAct->setStatusTip(tr("Save the current form letter"));
+    connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
+
+    printAct = new QAction(QIcon(":/images/print.png"), tr("&Print..."), this);
+    printAct->setShortcuts(QKeySequence::Print);
+    printAct->setStatusTip(tr("Print the current form letter"));
+    connect(printAct, SIGNAL(triggered()), this, SLOT(print()));
+
+    undoAct = new QAction(QIcon(":/images/undo.png"), tr("&Undo"), this);
+    undoAct->setShortcuts(QKeySequence::Undo);
+    undoAct->setStatusTip(tr("Undo the last editing action"));
+    connect(undoAct, SIGNAL(triggered()), this, SLOT(undo()));
+
+    quitAct = new QAction(tr("&Quit"), this);
+    quitAct->setShortcut(tr("Ctrl+Q"));
+    quitAct->setStatusTip(tr("Quit the application"));
+    connect(quitAct, SIGNAL(triggered()), this, SLOT(close()));
+
+    aboutAct = new QAction(tr("&About"), this);
+    aboutAct->setStatusTip(tr("Show the application's About box"));
+    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+    aboutQtAct = new QAction(tr("About &Qt"), this);
+    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+}
+
+void MainWindow::createMenus()
+{
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(newLetterAct);
+    fileMenu->addAction(saveAct);
+    fileMenu->addAction(printAct);
+    fileMenu->addSeparator();
+    fileMenu->addAction(quitAct);
+
+    editMenu = menuBar()->addMenu(tr("&Edit"));
+    editMenu->addAction(undoAct);
+
+    viewMenu = menuBar()->addMenu(tr("&View"));
+
+    menuBar()->addSeparator();
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+}
+
+void MainWindow::createToolBars()
+{
+    fileToolBar = addToolBar(tr("File"));
+    fileToolBar->addAction(newLetterAct);
+    fileToolBar->addAction(saveAct);
+    fileToolBar->addAction(printAct);
+
+    editToolBar = addToolBar(tr("Edit"));
+    editToolBar->addAction(undoAct);
+}
+
+//! [8]
+void MainWindow::createStatusBar()
+{
+    statusBar()->showMessage(tr("Ready"));
+}
+//! [8]
+
+//! [9]
+void MainWindow::createDockWindows()
+{
+    QDockWidget *dock = new QDockWidget(tr("Customers"), this);
+    dock->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
+    customerList = new QListWidget(dock);
+    customerList->addItems(QStringList()
+            << "John Doe, Harmony Enterprises, 12 Lakeside, Ambleton"
+            << "Jane Doe, Memorabilia, 23 Watersedge, Beaton"
+            << "Tammy Shea, Tiblanka, 38 Sea Views, Carlton"
+            << "Tim Sheen, Caraba Gifts, 48 Ocean Way, Deal"
+            << "Sol Harvey, Chicos Coffee, 53 New Springs, Eccleston"
+            << "Sally Hobart, Tiroli Tea, 67 Long River, Fedula");
+    dock->setWidget(customerList);
+    addDockWidget(Qt::RightDockWidgetArea, dock);
+    viewMenu->addAction(dock->toggleViewAction());
+
+    dock = new QDockWidget(tr("Paragraphs"), this);
+    paragraphsList = new QListWidget(dock);
+    paragraphsList->addItems(QStringList()
+            << "Thank you for your payment which we have received today."
+            << "Your order has been dispatched and should be with you "
+               "within 28 days."
+            << "We have dispatched those items that were in stock. The "
+               "rest of your order will be dispatched once all the "
+               "remaining items have arrived at our warehouse. No "
+               "additional shipping charges will be made."
+            << "You made a small overpayment (less than $5) which we "
+               "will keep on account for you, or return at your request."
+            << "You made a small underpayment (less than $1), but we have "
+               "sent your order anyway. We'll add this underpayment to "
+               "your next bill."
+            << "Unfortunately you did not send enough money. Please remit "
+               "an additional $. Your order will be dispatched as soon as "
+               "the complete amount has been received."
+            << "You made an overpayment (more than $5). Do you wish to "
+               "buy more items, or should we return the excess to you?");
+    dock->setWidget(paragraphsList);
+    addDockWidget(Qt::RightDockWidgetArea, dock);
+    viewMenu->addAction(dock->toggleViewAction());
+
+    connect(customerList, SIGNAL(currentTextChanged(const QString &)),
+            this, SLOT(insertCustomer(const QString &)));
+    connect(paragraphsList, SIGNAL(currentTextChanged(const QString &)),
+            this, SLOT(addParagraph(const QString &)));
+}
+//! [9]
diff --git a/examples/mainwindows/dockwidgets/mainwindow.h b/examples/mainwindows/dockwidgets/mainwindow.h
new file mode 100644
index 0000000..f4768d7
--- /dev/null
+++ b/examples/mainwindows/dockwidgets/mainwindow.h
@@ -0,0 +1,98 @@
+/****************************************************************************
+**
+** 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 MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QListWidget;
+class QMenu;
+class QTextEdit;
+QT_END_NAMESPACE
+
+//! [0]
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+private slots:
+    void newLetter();
+    void save();
+    void print();
+    void undo();
+    void about();
+    void insertCustomer(const QString &customer);
+    void addParagraph(const QString &paragraph);
+
+private:
+    void createActions();
+    void createMenus();
+    void createToolBars();
+    void createStatusBar();
+    void createDockWindows();
+
+    QTextEdit *textEdit;
+    QListWidget *customerList;
+    QListWidget *paragraphsList;
+
+    QMenu *fileMenu;
+    QMenu *editMenu;
+    QMenu *viewMenu;
+    QMenu *helpMenu;
+    QToolBar *fileToolBar;
+    QToolBar *editToolBar;
+    QAction *newLetterAct;
+    QAction *saveAct;
+    QAction *printAct;
+    QAction *undoAct;
+    QAction *aboutAct;
+    QAction *aboutQtAct;
+    QAction *quitAct;
+};
+//! [0]
+
+#endif
diff --git a/examples/mainwindows/mainwindows.pro b/examples/mainwindows/mainwindows.pro
new file mode 100644
index 0000000..90ff3a5
--- /dev/null
+++ b/examples/mainwindows/mainwindows.pro
@@ -0,0 +1,13 @@
+TEMPLATE      = subdirs
+SUBDIRS       = application \
+                dockwidgets \
+                mdi \
+                menus \
+                recentfiles \
+                sdi
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/mainwindows
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS mainwindows.pro README
+sources.path = $$[QT_INSTALL_EXAMPLES]/mainwindows
+INSTALLS += target sources
diff --git a/examples/mainwindows/mdi/images/copy.png b/examples/mainwindows/mdi/images/copy.png
new file mode 100644
index 0000000..2aeb282
--- /dev/null
+++ b/examples/mainwindows/mdi/images/copy.png
diff --git a/examples/mainwindows/mdi/images/cut.png b/examples/mainwindows/mdi/images/cut.png
new file mode 100644
index 0000000..54638e9
--- /dev/null
+++ b/examples/mainwindows/mdi/images/cut.png
diff --git a/examples/mainwindows/mdi/images/new.png b/examples/mainwindows/mdi/images/new.png
new file mode 100644
index 0000000..12131b0
--- /dev/null
+++ b/examples/mainwindows/mdi/images/new.png
diff --git a/examples/mainwindows/mdi/images/open.png b/examples/mainwindows/mdi/images/open.png
new file mode 100644
index 0000000..45fa288
--- /dev/null
+++ b/examples/mainwindows/mdi/images/open.png
diff --git a/examples/mainwindows/mdi/images/paste.png b/examples/mainwindows/mdi/images/paste.png
new file mode 100644
index 0000000..c14425c
--- /dev/null
+++ b/examples/mainwindows/mdi/images/paste.png
diff --git a/examples/mainwindows/mdi/images/save.png b/examples/mainwindows/mdi/images/save.png
new file mode 100644
index 0000000..daba865
--- /dev/null
+++ b/examples/mainwindows/mdi/images/save.png
diff --git a/examples/mainwindows/mdi/main.cpp b/examples/mainwindows/mdi/main.cpp
new file mode 100644
index 0000000..8592836
--- /dev/null
+++ b/examples/mainwindows/mdi/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 "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    Q_INIT_RESOURCE(mdi);
+
+    QApplication app(argc, argv);
+    MainWindow mainWin;
+    mainWin.show();
+    return app.exec();
+}
diff --git a/examples/mainwindows/mdi/mainwindow.cpp b/examples/mainwindows/mdi/mainwindow.cpp
new file mode 100644
index 0000000..49f9b21
--- /dev/null
+++ b/examples/mainwindows/mdi/mainwindow.cpp
@@ -0,0 +1,399 @@
+/****************************************************************************
+**
+** 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 "mainwindow.h"
+#include "mdichild.h"
+
+MainWindow::MainWindow()
+{
+    mdiArea = new QMdiArea;
+    mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+    mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+    setCentralWidget(mdiArea);
+    connect(mdiArea, SIGNAL(subWindowActivated(QMdiSubWindow *)),
+            this, SLOT(updateMenus()));
+    windowMapper = new QSignalMapper(this);
+    connect(windowMapper, SIGNAL(mapped(QWidget *)),
+            this, SLOT(setActiveSubWindow(QWidget *)));
+
+    createActions();
+    createMenus();
+    createToolBars();
+    createStatusBar();
+    updateMenus();
+
+    readSettings();
+
+    setWindowTitle(tr("MDI"));
+    setUnifiedTitleAndToolBarOnMac(true);
+}
+
+void MainWindow::closeEvent(QCloseEvent *event)
+{
+    mdiArea->closeAllSubWindows();
+    if (activeMdiChild()) {
+        event->ignore();
+    } else {
+        writeSettings();
+        event->accept();
+    }
+}
+
+void MainWindow::newFile()
+{
+    MdiChild *child = createMdiChild();
+    child->newFile();
+    child->show();
+}
+
+void MainWindow::open()
+{
+    QString fileName = QFileDialog::getOpenFileName(this);
+    if (!fileName.isEmpty()) {
+        QMdiSubWindow *existing = findMdiChild(fileName);
+        if (existing) {
+            mdiArea->setActiveSubWindow(existing);
+            return;
+        }
+
+        MdiChild *child = createMdiChild();
+        if (child->loadFile(fileName)) {
+            statusBar()->showMessage(tr("File loaded"), 2000);
+            child->show();
+        } else {
+            child->close();
+        }
+    }
+}
+
+void MainWindow::save()
+{
+    if (activeMdiChild() && activeMdiChild()->save())
+        statusBar()->showMessage(tr("File saved"), 2000);
+}
+
+void MainWindow::saveAs()
+{
+    if (activeMdiChild() && activeMdiChild()->saveAs())
+        statusBar()->showMessage(tr("File saved"), 2000);
+}
+
+void MainWindow::cut()
+{
+    if (activeMdiChild())
+        activeMdiChild()->cut();
+}
+
+void MainWindow::copy()
+{
+    if (activeMdiChild())
+        activeMdiChild()->copy();
+}
+
+void MainWindow::paste()
+{
+    if (activeMdiChild())
+        activeMdiChild()->paste();
+}
+
+void MainWindow::about()
+{
+   QMessageBox::about(this, tr("About MDI"),
+            tr("The <b>MDI</b> example demonstrates how to write multiple "
+               "document interface applications using Qt."));
+}
+
+void MainWindow::updateMenus()
+{
+    bool hasMdiChild = (activeMdiChild() != 0);
+    saveAct->setEnabled(hasMdiChild);
+    saveAsAct->setEnabled(hasMdiChild);
+    pasteAct->setEnabled(hasMdiChild);
+    closeAct->setEnabled(hasMdiChild);
+    closeAllAct->setEnabled(hasMdiChild);
+    tileAct->setEnabled(hasMdiChild);
+    cascadeAct->setEnabled(hasMdiChild);
+    nextAct->setEnabled(hasMdiChild);
+    previousAct->setEnabled(hasMdiChild);
+    separatorAct->setVisible(hasMdiChild);
+
+    bool hasSelection = (activeMdiChild() &&
+                         activeMdiChild()->textCursor().hasSelection());
+    cutAct->setEnabled(hasSelection);
+    copyAct->setEnabled(hasSelection);
+}
+
+void MainWindow::updateWindowMenu()
+{
+    windowMenu->clear();
+    windowMenu->addAction(closeAct);
+    windowMenu->addAction(closeAllAct);
+    windowMenu->addSeparator();
+    windowMenu->addAction(tileAct);
+    windowMenu->addAction(cascadeAct);
+    windowMenu->addSeparator();
+    windowMenu->addAction(nextAct);
+    windowMenu->addAction(previousAct);
+    windowMenu->addAction(separatorAct);
+
+    QList<QMdiSubWindow *> windows = mdiArea->subWindowList();
+    separatorAct->setVisible(!windows.isEmpty());
+
+    for (int i = 0; i < windows.size(); ++i) {
+        MdiChild *child = qobject_cast<MdiChild *>(windows.at(i)->widget());
+
+        QString text;
+        if (i < 9) {
+            text = tr("&%1 %2").arg(i + 1)
+                               .arg(child->userFriendlyCurrentFile());
+        } else {
+            text = tr("%1 %2").arg(i + 1)
+                              .arg(child->userFriendlyCurrentFile());
+        }
+        QAction *action  = windowMenu->addAction(text);
+        action->setCheckable(true);
+        action ->setChecked(child == activeMdiChild());
+        connect(action, SIGNAL(triggered()), windowMapper, SLOT(map()));
+        windowMapper->setMapping(action, windows.at(i));
+    }
+}
+
+MdiChild *MainWindow::createMdiChild()
+{
+    MdiChild *child = new MdiChild;
+    mdiArea->addSubWindow(child);
+
+    connect(child, SIGNAL(copyAvailable(bool)),
+            cutAct, SLOT(setEnabled(bool)));
+    connect(child, SIGNAL(copyAvailable(bool)),
+            copyAct, SLOT(setEnabled(bool)));
+
+    return child;
+}
+
+void MainWindow::createActions()
+{
+    newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this);
+    newAct->setShortcuts(QKeySequence::New);
+    newAct->setStatusTip(tr("Create a new file"));
+    connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
+
+    openAct = new QAction(QIcon(":/images/open.png"), tr("&Open..."), this);
+    openAct->setShortcuts(QKeySequence::Open);
+    openAct->setStatusTip(tr("Open an existing file"));
+    connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
+
+    saveAct = new QAction(QIcon(":/images/save.png"), tr("&Save"), this);
+    saveAct->setShortcuts(QKeySequence::Save);
+    saveAct->setStatusTip(tr("Save the document to disk"));
+    connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
+
+    saveAsAct = new QAction(tr("Save &As..."), this);
+    saveAsAct->setShortcuts(QKeySequence::SaveAs);
+    saveAsAct->setStatusTip(tr("Save the document under a new name"));
+    connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
+
+//! [0]
+    exitAct = new QAction(tr("E&xit"), this);
+    exitAct->setShortcut(tr("Ctrl+Q"));
+    exitAct->setStatusTip(tr("Exit the application"));
+    connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
+//! [0]
+
+    cutAct = new QAction(QIcon(":/images/cut.png"), tr("Cu&t"), this);
+    cutAct->setShortcuts(QKeySequence::Cut);
+    cutAct->setStatusTip(tr("Cut the current selection's contents to the "
+                            "clipboard"));
+    connect(cutAct, SIGNAL(triggered()), this, SLOT(cut()));
+
+    copyAct = new QAction(QIcon(":/images/copy.png"), tr("&Copy"), this);
+    copyAct->setShortcuts(QKeySequence::Copy);
+    copyAct->setStatusTip(tr("Copy the current selection's contents to the "
+                             "clipboard"));
+    connect(copyAct, SIGNAL(triggered()), this, SLOT(copy()));
+
+    pasteAct = new QAction(QIcon(":/images/paste.png"), tr("&Paste"), this);
+    pasteAct->setShortcuts(QKeySequence::Paste);
+    pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
+                              "selection"));
+    connect(pasteAct, SIGNAL(triggered()), this, SLOT(paste()));
+
+    closeAct = new QAction(tr("Cl&ose"), this);
+    closeAct->setShortcut(tr("Ctrl+F4"));
+    closeAct->setStatusTip(tr("Close the active window"));
+    connect(closeAct, SIGNAL(triggered()),
+            mdiArea, SLOT(closeActiveSubWindow()));
+
+    closeAllAct = new QAction(tr("Close &All"), this);
+    closeAllAct->setStatusTip(tr("Close all the windows"));
+    connect(closeAllAct, SIGNAL(triggered()),
+            mdiArea, SLOT(closeAllSubWindows()));
+
+    tileAct = new QAction(tr("&Tile"), this);
+    tileAct->setStatusTip(tr("Tile the windows"));
+    connect(tileAct, SIGNAL(triggered()), mdiArea, SLOT(tileSubWindows()));
+
+    cascadeAct = new QAction(tr("&Cascade"), this);
+    cascadeAct->setStatusTip(tr("Cascade the windows"));
+    connect(cascadeAct, SIGNAL(triggered()), mdiArea, SLOT(cascadeSubWindows()));
+
+    nextAct = new QAction(tr("Ne&xt"), this);
+    nextAct->setShortcuts(QKeySequence::NextChild);
+    nextAct->setStatusTip(tr("Move the focus to the next window"));
+    connect(nextAct, SIGNAL(triggered()),
+            mdiArea, SLOT(activateNextSubWindow()));
+
+    previousAct = new QAction(tr("Pre&vious"), this);
+    previousAct->setShortcuts(QKeySequence::PreviousChild);
+    previousAct->setStatusTip(tr("Move the focus to the previous "
+                                 "window"));
+    connect(previousAct, SIGNAL(triggered()),
+            mdiArea, SLOT(activatePreviousSubWindow()));
+
+    separatorAct = new QAction(this);
+    separatorAct->setSeparator(true);
+
+    aboutAct = new QAction(tr("&About"), this);
+    aboutAct->setStatusTip(tr("Show the application's About box"));
+    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+    aboutQtAct = new QAction(tr("About &Qt"), this);
+    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+}
+
+void MainWindow::createMenus()
+{
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(newAct);
+    fileMenu->addAction(openAct);
+    fileMenu->addAction(saveAct);
+    fileMenu->addAction(saveAsAct);
+    fileMenu->addSeparator();
+    QAction *action = fileMenu->addAction(tr("Switch layout direction"));
+    connect(action, SIGNAL(triggered()), this, SLOT(switchLayoutDirection()));
+    fileMenu->addAction(exitAct);
+
+    editMenu = menuBar()->addMenu(tr("&Edit"));
+    editMenu->addAction(cutAct);
+    editMenu->addAction(copyAct);
+    editMenu->addAction(pasteAct);
+
+    windowMenu = menuBar()->addMenu(tr("&Window"));
+    updateWindowMenu();
+    connect(windowMenu, SIGNAL(aboutToShow()), this, SLOT(updateWindowMenu()));
+
+    menuBar()->addSeparator();
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+}
+
+void MainWindow::createToolBars()
+{
+    fileToolBar = addToolBar(tr("File"));
+    fileToolBar->addAction(newAct);
+    fileToolBar->addAction(openAct);
+    fileToolBar->addAction(saveAct);
+
+    editToolBar = addToolBar(tr("Edit"));
+    editToolBar->addAction(cutAct);
+    editToolBar->addAction(copyAct);
+    editToolBar->addAction(pasteAct);
+}
+
+void MainWindow::createStatusBar()
+{
+    statusBar()->showMessage(tr("Ready"));
+}
+
+void MainWindow::readSettings()
+{
+    QSettings settings("Trolltech", "MDI Example");
+    QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
+    QSize size = settings.value("size", QSize(400, 400)).toSize();
+    move(pos);
+    resize(size);
+}
+
+void MainWindow::writeSettings()
+{
+    QSettings settings("Trolltech", "MDI Example");
+    settings.setValue("pos", pos());
+    settings.setValue("size", size());
+}
+
+MdiChild *MainWindow::activeMdiChild()
+{
+    if (QMdiSubWindow *activeSubWindow = mdiArea->activeSubWindow())
+        return qobject_cast<MdiChild *>(activeSubWindow->widget());
+    return 0;
+}
+
+QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName)
+{
+    QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath();
+
+    foreach (QMdiSubWindow *window, mdiArea->subWindowList()) {
+        MdiChild *mdiChild = qobject_cast<MdiChild *>(window->widget());
+        if (mdiChild->currentFile() == canonicalFilePath)
+            return window;
+    }
+    return 0;
+}
+
+void MainWindow::switchLayoutDirection()
+{
+    if (layoutDirection() == Qt::LeftToRight)
+        qApp->setLayoutDirection(Qt::RightToLeft);
+    else
+        qApp->setLayoutDirection(Qt::LeftToRight);
+}
+
+void MainWindow::setActiveSubWindow(QWidget *window)
+{
+    if (!window)
+        return;
+    mdiArea->setActiveSubWindow(qobject_cast<QMdiSubWindow *>(window));
+}
diff --git a/examples/mainwindows/mdi/mainwindow.h b/examples/mainwindows/mdi/mainwindow.h
new file mode 100644
index 0000000..ee91d36
--- /dev/null
+++ b/examples/mainwindows/mdi/mainwindow.h
@@ -0,0 +1,119 @@
+/****************************************************************************
+**
+** 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 MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+class MdiChild;
+QT_BEGIN_NAMESPACE
+class QAction;
+class QMenu;
+class QMdiArea;
+class QMdiSubWindow;
+class QSignalMapper;
+QT_END_NAMESPACE
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+protected:
+    void closeEvent(QCloseEvent *event);
+
+private slots:
+    void newFile();
+    void open();
+    void save();
+    void saveAs();
+    void cut();
+    void copy();
+    void paste();
+    void about();
+    void updateMenus();
+    void updateWindowMenu();
+    MdiChild *createMdiChild();
+    void switchLayoutDirection();
+    void setActiveSubWindow(QWidget *window);
+
+private:
+    void createActions();
+    void createMenus();
+    void createToolBars();
+    void createStatusBar();
+    void readSettings();
+    void writeSettings();
+    MdiChild *activeMdiChild();
+    QMdiSubWindow *findMdiChild(const QString &fileName);
+
+    QMdiArea *mdiArea;
+    QSignalMapper *windowMapper;
+
+    QMenu *fileMenu;
+    QMenu *editMenu;
+    QMenu *windowMenu;
+    QMenu *helpMenu;
+    QToolBar *fileToolBar;
+    QToolBar *editToolBar;
+    QAction *newAct;
+    QAction *openAct;
+    QAction *saveAct;
+    QAction *saveAsAct;
+    QAction *exitAct;
+    QAction *cutAct;
+    QAction *copyAct;
+    QAction *pasteAct;
+    QAction *closeAct;
+    QAction *closeAllAct;
+    QAction *tileAct;
+    QAction *cascadeAct;
+    QAction *nextAct;
+    QAction *previousAct;
+    QAction *separatorAct;
+    QAction *aboutAct;
+    QAction *aboutQtAct;
+};
+
+#endif
diff --git a/examples/mainwindows/mdi/mdi.pro b/examples/mainwindows/mdi/mdi.pro
new file mode 100644
index 0000000..4601f1c
--- /dev/null
+++ b/examples/mainwindows/mdi/mdi.pro
@@ -0,0 +1,12 @@
+HEADERS       = mainwindow.h \
+                mdichild.h
+SOURCES       = main.cpp \
+                mainwindow.cpp \
+                mdichild.cpp
+RESOURCES     = mdi.qrc
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/mdi
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS mdi.pro images
+sources.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/mdi
+INSTALLS += target sources
diff --git a/examples/mainwindows/mdi/mdi.qrc b/examples/mainwindows/mdi/mdi.qrc
new file mode 100644
index 0000000..0a776fa
--- /dev/null
+++ b/examples/mainwindows/mdi/mdi.qrc
@@ -0,0 +1,10 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>images/copy.png</file>
+    <file>images/cut.png</file>
+    <file>images/new.png</file>
+    <file>images/open.png</file>
+    <file>images/paste.png</file>
+    <file>images/save.png</file>
+</qresource>
+</RCC>
diff --git a/examples/mainwindows/mdi/mdichild.cpp b/examples/mainwindows/mdi/mdichild.cpp
new file mode 100644
index 0000000..1433450
--- /dev/null
+++ b/examples/mainwindows/mdi/mdichild.cpp
@@ -0,0 +1,176 @@
+/****************************************************************************
+**
+** 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 "mdichild.h"
+
+MdiChild::MdiChild()
+{
+    setAttribute(Qt::WA_DeleteOnClose);
+    isUntitled = true;
+}
+
+void MdiChild::newFile()
+{
+    static int sequenceNumber = 1;
+
+    isUntitled = true;
+    curFile = tr("document%1.txt").arg(sequenceNumber++);
+    setWindowTitle(curFile + "[*]");
+
+    connect(document(), SIGNAL(contentsChanged()),
+            this, SLOT(documentWasModified()));
+}
+
+bool MdiChild::loadFile(const QString &fileName)
+{
+    QFile file(fileName);
+    if (!file.open(QFile::ReadOnly | QFile::Text)) {
+        QMessageBox::warning(this, tr("MDI"),
+                             tr("Cannot read file %1:\n%2.")
+                             .arg(fileName)
+                             .arg(file.errorString()));
+        return false;
+    }
+
+    QTextStream in(&file);
+    QApplication::setOverrideCursor(Qt::WaitCursor);
+    setPlainText(in.readAll());
+    QApplication::restoreOverrideCursor();
+
+    setCurrentFile(fileName);
+
+    connect(document(), SIGNAL(contentsChanged()),
+            this, SLOT(documentWasModified()));
+
+    return true;
+}
+
+bool MdiChild::save()
+{
+    if (isUntitled) {
+        return saveAs();
+    } else {
+        return saveFile(curFile);
+    }
+}
+
+bool MdiChild::saveAs()
+{
+    QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),
+                                                    curFile);
+    if (fileName.isEmpty())
+        return false;
+
+    return saveFile(fileName);
+}
+
+bool MdiChild::saveFile(const QString &fileName)
+{
+    QFile file(fileName);
+    if (!file.open(QFile::WriteOnly | QFile::Text)) {
+        QMessageBox::warning(this, tr("MDI"),
+                             tr("Cannot write file %1:\n%2.")
+                             .arg(fileName)
+                             .arg(file.errorString()));
+        return false;
+    }
+
+    QTextStream out(&file);
+    QApplication::setOverrideCursor(Qt::WaitCursor);
+    out << toPlainText();
+    QApplication::restoreOverrideCursor();
+
+    setCurrentFile(fileName);
+    return true;
+}
+
+QString MdiChild::userFriendlyCurrentFile()
+{
+    return strippedName(curFile);
+}
+
+void MdiChild::closeEvent(QCloseEvent *event)
+{
+    if (maybeSave()) {
+        event->accept();
+    } else {
+        event->ignore();
+    }
+}
+
+void MdiChild::documentWasModified()
+{
+    setWindowModified(document()->isModified());
+}
+
+bool MdiChild::maybeSave()
+{
+    if (document()->isModified()) {
+	QMessageBox::StandardButton ret;
+        ret = QMessageBox::warning(this, tr("MDI"),
+                     tr("'%1' has been modified.\n"
+                        "Do you want to save your changes?")
+                     .arg(userFriendlyCurrentFile()),
+                     QMessageBox::Save | QMessageBox::Discard
+		     | QMessageBox::Cancel);
+        if (ret == QMessageBox::Save)
+            return save();
+        else if (ret == QMessageBox::Cancel)
+            return false;
+    }
+    return true;
+}
+
+void MdiChild::setCurrentFile(const QString &fileName)
+{
+    curFile = QFileInfo(fileName).canonicalFilePath();
+    isUntitled = false;
+    document()->setModified(false);
+    setWindowModified(false);
+    setWindowTitle(userFriendlyCurrentFile() + "[*]");
+}
+
+QString MdiChild::strippedName(const QString &fullFileName)
+{
+    return QFileInfo(fullFileName).fileName();
+}
diff --git a/examples/mainwindows/mdi/mdichild.h b/examples/mainwindows/mdi/mdichild.h
new file mode 100644
index 0000000..04084c7
--- /dev/null
+++ b/examples/mainwindows/mdi/mdichild.h
@@ -0,0 +1,77 @@
+/****************************************************************************
+**
+** 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 MDICHILD_H
+#define MDICHILD_H
+
+#include <QTextEdit>
+
+class MdiChild : public QTextEdit
+{
+    Q_OBJECT
+
+public:
+    MdiChild();
+
+    void newFile();
+    bool loadFile(const QString &fileName);
+    bool save();
+    bool saveAs();
+    bool saveFile(const QString &fileName);
+    QString userFriendlyCurrentFile();
+    QString currentFile() { return curFile; }
+
+protected:
+    void closeEvent(QCloseEvent *event);
+
+private slots:
+    void documentWasModified();
+
+private:
+    bool maybeSave();
+    void setCurrentFile(const QString &fileName);
+    QString strippedName(const QString &fullFileName);
+
+    QString curFile;
+    bool isUntitled;
+};
+
+#endif
diff --git a/examples/mainwindows/menus/main.cpp b/examples/mainwindows/menus/main.cpp
new file mode 100644
index 0000000..1d51376
--- /dev/null
+++ b/examples/mainwindows/menus/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 "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    MainWindow window;
+    window.show();
+    return app.exec();
+}
diff --git a/examples/mainwindows/menus/mainwindow.cpp b/examples/mainwindows/menus/mainwindow.cpp
new file mode 100644
index 0000000..4c10f73
--- /dev/null
+++ b/examples/mainwindows/menus/mainwindow.cpp
@@ -0,0 +1,371 @@
+/****************************************************************************
+**
+** 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 "mainwindow.h"
+
+//! [0]
+MainWindow::MainWindow()
+{
+    QWidget *widget = new QWidget;
+    setCentralWidget(widget);
+//! [0]
+
+//! [1]
+    QWidget *topFiller = new QWidget;
+    topFiller->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+    infoLabel = new QLabel(tr("<i>Choose a menu option, or right-click to "
+                              "invoke a context menu</i>"));
+    infoLabel->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
+    infoLabel->setAlignment(Qt::AlignCenter);
+
+    QWidget *bottomFiller = new QWidget;
+    bottomFiller->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+    QVBoxLayout *layout = new QVBoxLayout;
+    layout->setMargin(5);
+    layout->addWidget(topFiller);
+    layout->addWidget(infoLabel);
+    layout->addWidget(bottomFiller);
+    widget->setLayout(layout);
+//! [1]
+
+//! [2]
+    createActions();
+    createMenus();
+
+    QString message = tr("A context menu is available by right-clicking");
+    statusBar()->showMessage(message);
+
+    setWindowTitle(tr("Menus"));
+    setMinimumSize(160, 160);
+    resize(480, 320);
+}
+//! [2]
+
+//! [3]
+void MainWindow::contextMenuEvent(QContextMenuEvent *event)
+{
+    QMenu menu(this);
+    menu.addAction(cutAct);
+    menu.addAction(copyAct);
+    menu.addAction(pasteAct);
+    menu.exec(event->globalPos());
+}
+//! [3]
+
+void MainWindow::newFile()
+{
+    infoLabel->setText(tr("Invoked <b>File|New</b>"));
+}
+
+void MainWindow::open()
+{
+    infoLabel->setText(tr("Invoked <b>File|Open</b>"));
+}
+
+void MainWindow::save()
+{
+    infoLabel->setText(tr("Invoked <b>File|Save</b>"));
+}
+
+void MainWindow::print()
+{
+    infoLabel->setText(tr("Invoked <b>File|Print</b>"));
+}
+
+void MainWindow::undo()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Undo</b>"));
+}
+
+void MainWindow::redo()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Redo</b>"));
+}
+
+void MainWindow::cut()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Cut</b>"));
+}
+
+void MainWindow::copy()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Copy</b>"));
+}
+
+void MainWindow::paste()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Paste</b>"));
+}
+
+void MainWindow::bold()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Format|Bold</b>"));
+}
+
+void MainWindow::italic()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Format|Italic</b>"));
+}
+
+void MainWindow::leftAlign()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Format|Left Align</b>"));
+}
+
+void MainWindow::rightAlign()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Format|Right Align</b>"));
+}
+
+void MainWindow::justify()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Format|Justify</b>"));
+}
+
+void MainWindow::center()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Format|Center</b>"));
+}
+
+void MainWindow::setLineSpacing()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Format|Set Line Spacing</b>"));
+}
+
+void MainWindow::setParagraphSpacing()
+{
+    infoLabel->setText(tr("Invoked <b>Edit|Format|Set Paragraph Spacing</b>"));
+}
+
+void MainWindow::about()
+{
+    infoLabel->setText(tr("Invoked <b>Help|About</b>"));
+    QMessageBox::about(this, tr("About Menu"),
+            tr("The <b>Menu</b> example shows how to create "
+               "menu-bar menus and context menus."));
+}
+
+void MainWindow::aboutQt()
+{
+    infoLabel->setText(tr("Invoked <b>Help|About Qt</b>"));
+}
+
+//! [4]
+void MainWindow::createActions()
+{
+//! [5]
+    newAct = new QAction(tr("&New"), this);
+    newAct->setShortcuts(QKeySequence::New);
+    newAct->setStatusTip(tr("Create a new file"));
+    connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
+//! [4]
+
+    openAct = new QAction(tr("&Open..."), this);
+    openAct->setShortcuts(QKeySequence::Open);
+    openAct->setStatusTip(tr("Open an existing file"));
+    connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
+//! [5]
+
+    saveAct = new QAction(tr("&Save"), this);
+    saveAct->setShortcuts(QKeySequence::Save);
+    saveAct->setStatusTip(tr("Save the document to disk"));
+    connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
+
+    printAct = new QAction(tr("&Print..."), this);
+    printAct->setShortcuts(QKeySequence::Print);
+    printAct->setStatusTip(tr("Print the document"));
+    connect(printAct, SIGNAL(triggered()), this, SLOT(print()));
+
+    exitAct = new QAction(tr("E&xit"), this);
+    exitAct->setShortcut(tr("Ctrl+Q"));
+    exitAct->setStatusTip(tr("Exit the application"));
+    connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
+
+    undoAct = new QAction(tr("&Undo"), this);
+    undoAct->setShortcuts(QKeySequence::Undo);
+    undoAct->setStatusTip(tr("Undo the last operation"));
+    connect(undoAct, SIGNAL(triggered()), this, SLOT(undo()));
+
+    redoAct = new QAction(tr("&Redo"), this);
+    redoAct->setShortcuts(QKeySequence::Redo);
+    redoAct->setStatusTip(tr("Redo the last operation"));
+    connect(redoAct, SIGNAL(triggered()), this, SLOT(redo()));
+
+    cutAct = new QAction(tr("Cu&t"), this);
+    cutAct->setShortcuts(QKeySequence::Cut);
+    cutAct->setStatusTip(tr("Cut the current selection's contents to the "
+                            "clipboard"));
+    connect(cutAct, SIGNAL(triggered()), this, SLOT(cut()));
+
+    copyAct = new QAction(tr("&Copy"), this);
+    copyAct->setShortcut(tr("Ctrl+C"));
+    copyAct->setStatusTip(tr("Copy the current selection's contents to the "
+                             "clipboard"));
+    connect(copyAct, SIGNAL(triggered()), this, SLOT(copy()));
+
+    pasteAct = new QAction(tr("&Paste"), this);
+    pasteAct->setShortcuts(QKeySequence::Paste);
+    pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
+                              "selection"));
+    connect(pasteAct, SIGNAL(triggered()), this, SLOT(paste()));
+
+    boldAct = new QAction(tr("&Bold"), this);
+    boldAct->setCheckable(true);
+    boldAct->setShortcut(tr("Ctrl+B"));
+    boldAct->setStatusTip(tr("Make the text bold"));
+    connect(boldAct, SIGNAL(triggered()), this, SLOT(bold()));
+
+    QFont boldFont = boldAct->font();
+    boldFont.setBold(true);
+    boldAct->setFont(boldFont);
+
+    italicAct = new QAction(tr("&Italic"), this);
+    italicAct->setCheckable(true);
+    italicAct->setShortcut(tr("Ctrl+I"));
+    italicAct->setStatusTip(tr("Make the text italic"));
+    connect(italicAct, SIGNAL(triggered()), this, SLOT(italic()));
+
+    QFont italicFont = italicAct->font();
+    italicFont.setItalic(true);
+    italicAct->setFont(italicFont);
+
+    setLineSpacingAct = new QAction(tr("Set &Line Spacing..."), this);
+    setLineSpacingAct->setStatusTip(tr("Change the gap between the lines of a "
+                                       "paragraph"));
+    connect(setLineSpacingAct, SIGNAL(triggered()), this, SLOT(setLineSpacing()));
+
+    setParagraphSpacingAct = new QAction(tr("Set &Paragraph Spacing..."), this);
+    setLineSpacingAct->setStatusTip(tr("Change the gap between paragraphs"));
+    connect(setParagraphSpacingAct, SIGNAL(triggered()),
+            this, SLOT(setParagraphSpacing()));
+
+    aboutAct = new QAction(tr("&About"), this);
+    aboutAct->setStatusTip(tr("Show the application's About box"));
+    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+    aboutQtAct = new QAction(tr("About &Qt"), this);
+    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+    connect(aboutQtAct, SIGNAL(triggered()), this, SLOT(aboutQt()));
+
+    leftAlignAct = new QAction(tr("&Left Align"), this);
+    leftAlignAct->setCheckable(true);
+    leftAlignAct->setShortcut(tr("Ctrl+L"));
+    leftAlignAct->setStatusTip(tr("Left align the selected text"));
+    connect(leftAlignAct, SIGNAL(triggered()), this, SLOT(leftAlign()));
+
+    rightAlignAct = new QAction(tr("&Right Align"), this);
+    rightAlignAct->setCheckable(true);
+    rightAlignAct->setShortcut(tr("Ctrl+R"));
+    rightAlignAct->setStatusTip(tr("Right align the selected text"));
+    connect(rightAlignAct, SIGNAL(triggered()), this, SLOT(rightAlign()));
+
+    justifyAct = new QAction(tr("&Justify"), this);
+    justifyAct->setCheckable(true);
+    justifyAct->setShortcut(tr("Ctrl+J"));
+    justifyAct->setStatusTip(tr("Justify the selected text"));
+    connect(justifyAct, SIGNAL(triggered()), this, SLOT(justify()));
+
+    centerAct = new QAction(tr("&Center"), this);
+    centerAct->setCheckable(true);
+    centerAct->setShortcut(tr("Ctrl+E"));
+    centerAct->setStatusTip(tr("Center the selected text"));
+    connect(centerAct, SIGNAL(triggered()), this, SLOT(center()));
+
+//! [6] //! [7]
+    alignmentGroup = new QActionGroup(this);
+    alignmentGroup->addAction(leftAlignAct);
+    alignmentGroup->addAction(rightAlignAct);
+    alignmentGroup->addAction(justifyAct);
+    alignmentGroup->addAction(centerAct);
+    leftAlignAct->setChecked(true);
+//! [6]
+}
+//! [7]
+
+//! [8]
+void MainWindow::createMenus()
+{
+//! [9] //! [10]
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(newAct);
+//! [9]
+    fileMenu->addAction(openAct);
+//! [10]
+    fileMenu->addAction(saveAct);
+    fileMenu->addAction(printAct);
+//! [11]
+    fileMenu->addSeparator();
+//! [11]
+    fileMenu->addAction(exitAct);
+
+    editMenu = menuBar()->addMenu(tr("&Edit"));
+    editMenu->addAction(undoAct);
+    editMenu->addAction(redoAct);
+    editMenu->addSeparator();
+    editMenu->addAction(cutAct);
+    editMenu->addAction(copyAct);
+    editMenu->addAction(pasteAct);
+    editMenu->addSeparator();
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+//! [8]
+
+//! [12]
+    formatMenu = editMenu->addMenu(tr("&Format"));
+    formatMenu->addAction(boldAct);
+    formatMenu->addAction(italicAct);
+    formatMenu->addSeparator()->setText(tr("Alignment"));
+    formatMenu->addAction(leftAlignAct);
+    formatMenu->addAction(rightAlignAct);
+    formatMenu->addAction(justifyAct);
+    formatMenu->addAction(centerAct);
+    formatMenu->addSeparator();
+    formatMenu->addAction(setLineSpacingAct);
+    formatMenu->addAction(setParagraphSpacingAct);
+}
+//! [12]
diff --git a/examples/mainwindows/menus/mainwindow.h b/examples/mainwindows/menus/mainwindow.h
new file mode 100644
index 0000000..4894a9a
--- /dev/null
+++ b/examples/mainwindows/menus/mainwindow.h
@@ -0,0 +1,125 @@
+/****************************************************************************
+**
+** 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 MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QActionGroup;
+class QLabel;
+class QMenu;
+QT_END_NAMESPACE
+
+//! [0]
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+protected:
+    void contextMenuEvent(QContextMenuEvent *event);
+//! [0]
+
+//! [1]
+private slots:
+    void newFile();
+    void open();
+    void save();
+    void print();
+    void undo();
+    void redo();
+    void cut();
+    void copy();
+    void paste();
+    void bold();
+    void italic();
+    void leftAlign();
+    void rightAlign();
+    void justify();
+    void center();
+    void setLineSpacing();
+    void setParagraphSpacing();
+    void about();
+    void aboutQt();
+//! [1]
+
+//! [2]
+private:
+    void createActions();
+    void createMenus();
+//! [2]
+
+//! [3]
+    QMenu *fileMenu;
+    QMenu *editMenu;
+    QMenu *formatMenu;
+    QMenu *helpMenu;
+    QActionGroup *alignmentGroup;
+    QAction *newAct;
+    QAction *openAct;
+    QAction *saveAct;
+    QAction *printAct;
+    QAction *exitAct;
+    QAction *undoAct;
+    QAction *redoAct;
+    QAction *cutAct;
+    QAction *copyAct;
+    QAction *pasteAct;
+    QAction *boldAct;
+    QAction *italicAct;
+    QAction *leftAlignAct;
+    QAction *rightAlignAct;
+    QAction *justifyAct;
+    QAction *centerAct;
+    QAction *setLineSpacingAct;
+    QAction *setParagraphSpacingAct;
+    QAction *aboutAct;
+    QAction *aboutQtAct;
+    QLabel *infoLabel;
+};
+//! [3]
+
+#endif
diff --git a/examples/mainwindows/menus/menus.pro b/examples/mainwindows/menus/menus.pro
new file mode 100644
index 0000000..7b0a2ec
--- /dev/null
+++ b/examples/mainwindows/menus/menus.pro
@@ -0,0 +1,9 @@
+HEADERS       = mainwindow.h
+SOURCES       = mainwindow.cpp \
+                main.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/menus
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS menus.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/menus
+INSTALLS += target sources
diff --git a/examples/mainwindows/recentfiles/main.cpp b/examples/mainwindows/recentfiles/main.cpp
new file mode 100644
index 0000000..d1c8eb0
--- /dev/null
+++ b/examples/mainwindows/recentfiles/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 "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    MainWindow *mainWin = new MainWindow;
+    mainWin->show();
+    return app.exec();
+}
diff --git a/examples/mainwindows/recentfiles/mainwindow.cpp b/examples/mainwindows/recentfiles/mainwindow.cpp
new file mode 100644
index 0000000..c8c2f88
--- /dev/null
+++ b/examples/mainwindows/recentfiles/mainwindow.cpp
@@ -0,0 +1,256 @@
+/****************************************************************************
+**
+** 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 "mainwindow.h"
+
+MainWindow::MainWindow()
+{
+    setAttribute(Qt::WA_DeleteOnClose);
+
+    textEdit = new QTextEdit;
+    setCentralWidget(textEdit);
+
+    createActions();
+    createMenus();
+    (void)statusBar();
+
+    setWindowTitle(tr("Recent Files"));
+    resize(400, 300);
+}
+
+void MainWindow::newFile()
+{
+    MainWindow *other = new MainWindow;
+    other->show();
+}
+
+void MainWindow::open()
+{
+    QString fileName = QFileDialog::getOpenFileName(this);
+    if (!fileName.isEmpty())
+        loadFile(fileName);
+}
+
+void MainWindow::save()
+{
+    if (curFile.isEmpty())
+        saveAs();
+    else
+        saveFile(curFile);
+}
+
+void MainWindow::saveAs()
+{
+    QString fileName = QFileDialog::getSaveFileName(this);
+    if (fileName.isEmpty())
+        return;
+
+    saveFile(fileName);
+}
+
+void MainWindow::openRecentFile()
+{
+    QAction *action = qobject_cast<QAction *>(sender());
+    if (action)
+        loadFile(action->data().toString());
+}
+
+void MainWindow::about()
+{
+   QMessageBox::about(this, tr("About Recent Files"),
+            tr("The <b>Recent Files</b> example demonstrates how to provide a "
+               "recently used file menu in a Qt application."));
+}
+
+void MainWindow::createActions()
+{
+    newAct = new QAction(tr("&New"), this);
+    newAct->setShortcuts(QKeySequence::New);
+    newAct->setStatusTip(tr("Create a new file"));
+    connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
+
+    openAct = new QAction(tr("&Open..."), this);
+    openAct->setShortcuts(QKeySequence::Open);
+    openAct->setStatusTip(tr("Open an existing file"));
+    connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
+
+    saveAct = new QAction(tr("&Save"), this);
+    saveAct->setShortcuts(QKeySequence::Save);
+    saveAct->setStatusTip(tr("Save the document to disk"));
+    connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
+
+    saveAsAct = new QAction(tr("Save &As..."), this);
+    saveAsAct->setShortcuts(QKeySequence::SaveAs);
+    saveAsAct->setStatusTip(tr("Save the document under a new name"));
+    connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
+
+    for (int i = 0; i < MaxRecentFiles; ++i) {
+        recentFileActs[i] = new QAction(this);
+        recentFileActs[i]->setVisible(false);
+        connect(recentFileActs[i], SIGNAL(triggered()),
+                this, SLOT(openRecentFile()));
+    }
+
+    exitAct = new QAction(tr("E&xit"), this);
+    exitAct->setShortcut(tr("Ctrl+Q"));
+    exitAct->setStatusTip(tr("Exit the application"));
+    connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
+
+    aboutAct = new QAction(tr("&About"), this);
+    aboutAct->setStatusTip(tr("Show the application's About box"));
+    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+    aboutQtAct = new QAction(tr("About &Qt"), this);
+    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+}
+
+void MainWindow::createMenus()
+{
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(newAct);
+    fileMenu->addAction(openAct);
+    fileMenu->addAction(saveAct);
+    fileMenu->addAction(saveAsAct);
+    separatorAct = fileMenu->addSeparator();
+    for (int i = 0; i < MaxRecentFiles; ++i)
+        fileMenu->addAction(recentFileActs[i]);
+    fileMenu->addSeparator();
+    fileMenu->addAction(exitAct);
+    updateRecentFileActions();
+
+    menuBar()->addSeparator();
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+}
+
+void MainWindow::loadFile(const QString &fileName)
+{
+    QFile file(fileName);
+    if (!file.open(QFile::ReadOnly | QFile::Text)) {
+        QMessageBox::warning(this, tr("Recent Files"),
+                             tr("Cannot read file %1:\n%2.")
+                             .arg(fileName)
+                             .arg(file.errorString()));
+        return;
+    }
+
+    QTextStream in(&file);
+    QApplication::setOverrideCursor(Qt::WaitCursor);
+    textEdit->setPlainText(in.readAll());
+    QApplication::restoreOverrideCursor();
+
+    setCurrentFile(fileName);
+    statusBar()->showMessage(tr("File loaded"), 2000);
+}
+
+void MainWindow::saveFile(const QString &fileName)
+{
+    QFile file(fileName);
+    if (!file.open(QFile::WriteOnly | QFile::Text)) {
+        QMessageBox::warning(this, tr("Recent Files"),
+                             tr("Cannot write file %1:\n%2.")
+                             .arg(fileName)
+                             .arg(file.errorString()));
+        return;
+    }
+
+    QTextStream out(&file);
+    QApplication::setOverrideCursor(Qt::WaitCursor);
+    out << textEdit->toPlainText();
+    QApplication::restoreOverrideCursor();
+
+    setCurrentFile(fileName);
+    statusBar()->showMessage(tr("File saved"), 2000);
+}
+
+void MainWindow::setCurrentFile(const QString &fileName)
+{
+    curFile = fileName;
+    if (curFile.isEmpty())
+        setWindowTitle(tr("Recent Files"));
+    else
+        setWindowTitle(tr("%1 - %2").arg(strippedName(curFile))
+                                    .arg(tr("Recent Files")));
+
+    QSettings settings("Trolltech", "Recent Files Example");
+    QStringList files = settings.value("recentFileList").toStringList();
+    files.removeAll(fileName);
+    files.prepend(fileName);
+    while (files.size() > MaxRecentFiles)
+        files.removeLast();
+
+    settings.setValue("recentFileList", files);
+
+    foreach (QWidget *widget, QApplication::topLevelWidgets()) {
+        MainWindow *mainWin = qobject_cast<MainWindow *>(widget);
+        if (mainWin)
+            mainWin->updateRecentFileActions();
+    }
+}
+
+void MainWindow::updateRecentFileActions()
+{
+    QSettings settings("Trolltech", "Recent Files Example");
+    QStringList files = settings.value("recentFileList").toStringList();
+
+    int numRecentFiles = qMin(files.size(), (int)MaxRecentFiles);
+
+    for (int i = 0; i < numRecentFiles; ++i) {
+        QString text = tr("&%1 %2").arg(i + 1).arg(strippedName(files[i]));
+        recentFileActs[i]->setText(text);
+        recentFileActs[i]->setData(files[i]);
+        recentFileActs[i]->setVisible(true);
+    }
+    for (int j = numRecentFiles; j < MaxRecentFiles; ++j)
+        recentFileActs[j]->setVisible(false);
+
+    separatorAct->setVisible(numRecentFiles > 0);
+}
+
+QString MainWindow::strippedName(const QString &fullFileName)
+{
+    return QFileInfo(fullFileName).fileName();
+}
diff --git a/examples/mainwindows/recentfiles/mainwindow.h b/examples/mainwindows/recentfiles/mainwindow.h
new file mode 100644
index 0000000..9d9d467
--- /dev/null
+++ b/examples/mainwindows/recentfiles/mainwindow.h
@@ -0,0 +1,97 @@
+/****************************************************************************
+**
+** 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 MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QList>
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QMenu;
+class QTextEdit;
+QT_END_NAMESPACE
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+private slots:
+    void newFile();
+    void open();
+    void save();
+    void saveAs();
+    void openRecentFile();
+    void about();
+
+private:
+    void createActions();
+    void createMenus();
+    void loadFile(const QString &fileName);
+    void saveFile(const QString &fileName);
+    void setCurrentFile(const QString &fileName);
+    void updateRecentFileActions();
+    QString strippedName(const QString &fullFileName);
+
+    QString curFile;
+
+    QTextEdit *textEdit;
+    QMenu *fileMenu;
+    QMenu *recentFilesMenu;
+    QMenu *helpMenu;
+    QAction *newAct;
+    QAction *openAct;
+    QAction *saveAct;
+    QAction *saveAsAct;
+    QAction *exitAct;
+    QAction *aboutAct;
+    QAction *aboutQtAct;
+    QAction *separatorAct;
+
+    enum { MaxRecentFiles = 5 };
+    QAction *recentFileActs[MaxRecentFiles];
+};
+
+#endif
diff --git a/examples/mainwindows/recentfiles/recentfiles.pro b/examples/mainwindows/recentfiles/recentfiles.pro
new file mode 100644
index 0000000..7c62cdf
--- /dev/null
+++ b/examples/mainwindows/recentfiles/recentfiles.pro
@@ -0,0 +1,9 @@
+HEADERS       = mainwindow.h
+SOURCES       = main.cpp \
+                mainwindow.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/recentfiles
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS recentfiles.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/recentfiles
+INSTALLS += target sources
diff --git a/examples/mainwindows/sdi/images/copy.png b/examples/mainwindows/sdi/images/copy.png
new file mode 100644
index 0000000..2aeb282
--- /dev/null
+++ b/examples/mainwindows/sdi/images/copy.png
diff --git a/examples/mainwindows/sdi/images/cut.png b/examples/mainwindows/sdi/images/cut.png
new file mode 100644
index 0000000..54638e9
--- /dev/null
+++ b/examples/mainwindows/sdi/images/cut.png
diff --git a/examples/mainwindows/sdi/images/new.png b/examples/mainwindows/sdi/images/new.png
new file mode 100644
index 0000000..12131b0
--- /dev/null
+++ b/examples/mainwindows/sdi/images/new.png
diff --git a/examples/mainwindows/sdi/images/open.png b/examples/mainwindows/sdi/images/open.png
new file mode 100644
index 0000000..45fa288
--- /dev/null
+++ b/examples/mainwindows/sdi/images/open.png
diff --git a/examples/mainwindows/sdi/images/paste.png b/examples/mainwindows/sdi/images/paste.png
new file mode 100644
index 0000000..c14425c
--- /dev/null
+++ b/examples/mainwindows/sdi/images/paste.png
diff --git a/examples/mainwindows/sdi/images/save.png b/examples/mainwindows/sdi/images/save.png
new file mode 100644
index 0000000..daba865
--- /dev/null
+++ b/examples/mainwindows/sdi/images/save.png
diff --git a/examples/mainwindows/sdi/main.cpp b/examples/mainwindows/sdi/main.cpp
new file mode 100644
index 0000000..163ad93
--- /dev/null
+++ b/examples/mainwindows/sdi/main.cpp
@@ -0,0 +1,53 @@
+/****************************************************************************
+**
+** 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 "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    Q_INIT_RESOURCE(sdi);
+    QApplication app(argc, argv);
+    MainWindow *mainWin = new MainWindow;
+    mainWin->show();
+    return app.exec();
+}
diff --git a/examples/mainwindows/sdi/mainwindow.cpp b/examples/mainwindows/sdi/mainwindow.cpp
new file mode 100644
index 0000000..61d63b3
--- /dev/null
+++ b/examples/mainwindows/sdi/mainwindow.cpp
@@ -0,0 +1,375 @@
+/****************************************************************************
+**
+** 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 "mainwindow.h"
+
+MainWindow::MainWindow()
+{
+    init();
+    setCurrentFile("");
+}
+
+MainWindow::MainWindow(const QString &fileName)
+{
+    init();
+    loadFile(fileName);
+}
+
+void MainWindow::closeEvent(QCloseEvent *event)
+{
+    if (maybeSave()) {
+        writeSettings();
+        event->accept();
+    } else {
+        event->ignore();
+    }
+}
+
+void MainWindow::newFile()
+{
+    MainWindow *other = new MainWindow;
+    other->move(x() + 40, y() + 40);
+    other->show();
+}
+
+void MainWindow::open()
+{
+    QString fileName = QFileDialog::getOpenFileName(this);
+    if (!fileName.isEmpty()) {
+        MainWindow *existing = findMainWindow(fileName);
+        if (existing) {
+            existing->show();
+            existing->raise();
+            existing->activateWindow();
+            return;
+        }
+
+        if (isUntitled && textEdit->document()->isEmpty()
+                && !isWindowModified()) {
+            loadFile(fileName);
+        } else {
+            MainWindow *other = new MainWindow(fileName);
+            if (other->isUntitled) {
+                delete other;
+                return;
+            }
+            other->move(x() + 40, y() + 40);
+            other->show();
+        }
+    }
+}
+
+bool MainWindow::save()
+{
+    if (isUntitled) {
+        return saveAs();
+    } else {
+        return saveFile(curFile);
+    }
+}
+
+bool MainWindow::saveAs()
+{
+    QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),
+                                                    curFile);
+    if (fileName.isEmpty())
+        return false;
+
+    return saveFile(fileName);
+}
+
+void MainWindow::about()
+{
+   QMessageBox::about(this, tr("About SDI"),
+            tr("The <b>SDI</b> example demonstrates how to write single "
+               "document interface applications using Qt."));
+}
+
+void MainWindow::documentWasModified()
+{
+    setWindowModified(true);
+}
+
+void MainWindow::init()
+{
+    setAttribute(Qt::WA_DeleteOnClose);
+
+    isUntitled = true;
+
+    textEdit = new QTextEdit;
+    setCentralWidget(textEdit);
+
+    createActions();
+    createMenus();
+    createToolBars();
+    createStatusBar();
+
+    readSettings();
+
+    connect(textEdit->document(), SIGNAL(contentsChanged()),
+            this, SLOT(documentWasModified()));
+
+    setUnifiedTitleAndToolBarOnMac(true);
+}
+
+void MainWindow::createActions()
+{
+    newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this);
+    newAct->setShortcuts(QKeySequence::New);
+    newAct->setStatusTip(tr("Create a new file"));
+    connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
+
+    openAct = new QAction(QIcon(":/images/open.png"), tr("&Open..."), this);
+    openAct->setShortcuts(QKeySequence::Open);
+    openAct->setStatusTip(tr("Open an existing file"));
+    connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
+
+    saveAct = new QAction(QIcon(":/images/save.png"), tr("&Save"), this);
+    saveAct->setShortcuts(QKeySequence::Save);
+    saveAct->setStatusTip(tr("Save the document to disk"));
+    connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
+
+    saveAsAct = new QAction(tr("Save &As..."), this);
+    saveAsAct->setShortcuts(QKeySequence::SaveAs);
+    saveAsAct->setStatusTip(tr("Save the document under a new name"));
+    connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
+
+    closeAct = new QAction(tr("&Close"), this);
+    closeAct->setShortcut(tr("Ctrl+W"));
+    closeAct->setStatusTip(tr("Close this window"));
+    connect(closeAct, SIGNAL(triggered()), this, SLOT(close()));
+
+    exitAct = new QAction(tr("E&xit"), this);
+    exitAct->setShortcut(tr("Ctrl+Q"));
+    exitAct->setStatusTip(tr("Exit the application"));
+    connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
+
+    cutAct = new QAction(QIcon(":/images/cut.png"), tr("Cu&t"), this);
+    cutAct->setShortcuts(QKeySequence::Cut);
+    cutAct->setStatusTip(tr("Cut the current selection's contents to the "
+                            "clipboard"));
+    connect(cutAct, SIGNAL(triggered()), textEdit, SLOT(cut()));
+
+    copyAct = new QAction(QIcon(":/images/copy.png"), tr("&Copy"), this);
+    copyAct->setShortcuts(QKeySequence::Copy);
+    copyAct->setStatusTip(tr("Copy the current selection's contents to the "
+                             "clipboard"));
+    connect(copyAct, SIGNAL(triggered()), textEdit, SLOT(copy()));
+
+    pasteAct = new QAction(QIcon(":/images/paste.png"), tr("&Paste"), this);
+    pasteAct->setShortcuts(QKeySequence::Paste);
+    pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
+                              "selection"));
+    connect(pasteAct, SIGNAL(triggered()), textEdit, SLOT(paste()));
+
+    aboutAct = new QAction(tr("&About"), this);
+    aboutAct->setStatusTip(tr("Show the application's About box"));
+    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+    aboutQtAct = new QAction(tr("About &Qt"), this);
+    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+
+
+    cutAct->setEnabled(false);
+    copyAct->setEnabled(false);
+    connect(textEdit, SIGNAL(copyAvailable(bool)),
+            cutAct, SLOT(setEnabled(bool)));
+    connect(textEdit, SIGNAL(copyAvailable(bool)),
+            copyAct, SLOT(setEnabled(bool)));
+}
+
+//! [implicit tr context]
+void MainWindow::createMenus()
+{
+    fileMenu = menuBar()->addMenu(tr("&File"));
+//! [implicit tr context]
+    fileMenu->addAction(newAct);
+    fileMenu->addAction(openAct);
+    fileMenu->addAction(saveAct);
+    fileMenu->addAction(saveAsAct);
+    fileMenu->addSeparator();
+    fileMenu->addAction(closeAct);
+    fileMenu->addAction(exitAct);
+
+    editMenu = menuBar()->addMenu(tr("&Edit"));
+    editMenu->addAction(cutAct);
+    editMenu->addAction(copyAct);
+    editMenu->addAction(pasteAct);
+
+    menuBar()->addSeparator();
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+}
+
+void MainWindow::createToolBars()
+{
+//! [0]
+    fileToolBar = addToolBar(tr("File"));
+    fileToolBar->addAction(newAct);
+    fileToolBar->addAction(openAct);
+//! [0]
+    fileToolBar->addAction(saveAct);
+
+    editToolBar = addToolBar(tr("Edit"));
+    editToolBar->addAction(cutAct);
+    editToolBar->addAction(copyAct);
+    editToolBar->addAction(pasteAct);
+}
+
+void MainWindow::createStatusBar()
+{
+    statusBar()->showMessage(tr("Ready"));
+}
+
+void MainWindow::readSettings()
+{
+    QSettings settings("Trolltech", "SDI Example");
+    QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
+    QSize size = settings.value("size", QSize(400, 400)).toSize();
+    move(pos);
+    resize(size);
+}
+
+void MainWindow::writeSettings()
+{
+    QSettings settings("Trolltech", "SDI Example");
+    settings.setValue("pos", pos());
+    settings.setValue("size", size());
+}
+
+bool MainWindow::maybeSave()
+{
+    if (textEdit->document()->isModified()) {
+	QMessageBox::StandardButton ret;
+        ret = QMessageBox::warning(this, tr("SDI"),
+                     tr("The document has been modified.\n"
+                        "Do you want to save your changes?"),
+                     QMessageBox::Save | QMessageBox::Discard
+		     | QMessageBox::Cancel);
+        if (ret == QMessageBox::Save)
+            return save();
+        else if (ret == QMessageBox::Cancel)
+            return false;
+    }
+    return true;
+}
+
+void MainWindow::loadFile(const QString &fileName)
+{
+
+    QFile file(fileName);
+    if (!file.open(QFile::ReadOnly | QFile::Text)) {
+        QMessageBox::warning(this, tr("SDI"),
+                             tr("Cannot read file %1:\n%2.")
+                             .arg(fileName)
+                             .arg(file.errorString()));
+        return;
+    }
+
+    QTextStream in(&file);
+    QApplication::setOverrideCursor(Qt::WaitCursor);
+    textEdit->setPlainText(in.readAll());
+    QApplication::restoreOverrideCursor();
+
+    setCurrentFile(fileName);
+    statusBar()->showMessage(tr("File loaded"), 2000);
+}
+
+bool MainWindow::saveFile(const QString &fileName)
+{
+    QFile file(fileName);
+    if (!file.open(QFile::WriteOnly | QFile::Text)) {
+        QMessageBox::warning(this, tr("SDI"),
+                             tr("Cannot write file %1:\n%2.")
+                             .arg(fileName)
+                             .arg(file.errorString()));
+        return false;
+    }
+
+    QTextStream out(&file);
+    QApplication::setOverrideCursor(Qt::WaitCursor);
+    out << textEdit->toPlainText();
+    QApplication::restoreOverrideCursor();
+
+    setCurrentFile(fileName);
+    statusBar()->showMessage(tr("File saved"), 2000);
+    return true;
+}
+
+void MainWindow::setCurrentFile(const QString &fileName)
+{
+    static int sequenceNumber = 1;
+
+    isUntitled = fileName.isEmpty();
+    if (isUntitled) {
+        curFile = tr("document%1.txt").arg(sequenceNumber++);
+    } else {
+        curFile = QFileInfo(fileName).canonicalFilePath();
+    }
+
+    textEdit->document()->setModified(false);
+    setWindowModified(false);
+
+    setWindowTitle(tr("%1[*] - %2").arg(strippedName(curFile))
+                                       .arg(tr("SDI")));
+}
+
+QString MainWindow::strippedName(const QString &fullFileName)
+{
+    return QFileInfo(fullFileName).fileName();
+}
+
+MainWindow *MainWindow::findMainWindow(const QString &fileName)
+{
+    QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath();
+
+    foreach (QWidget *widget, qApp->topLevelWidgets()) {
+        MainWindow *mainWin = qobject_cast<MainWindow *>(widget);
+        if (mainWin && mainWin->curFile == canonicalFilePath)
+            return mainWin;
+    }
+    return 0;
+}
diff --git a/examples/mainwindows/sdi/mainwindow.h b/examples/mainwindows/sdi/mainwindow.h
new file mode 100644
index 0000000..f08cee2
--- /dev/null
+++ b/examples/mainwindows/sdi/mainwindow.h
@@ -0,0 +1,109 @@
+/****************************************************************************
+**
+** 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 MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QMenu;
+class QTextEdit;
+QT_END_NAMESPACE
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+    MainWindow(const QString &fileName);
+
+protected:
+    void closeEvent(QCloseEvent *event);
+
+private slots:
+    void newFile();
+    void open();
+    bool save();
+    bool saveAs();
+    void about();
+    void documentWasModified();
+
+private:
+    void init();
+    void createActions();
+    void createMenus();
+    void createToolBars();
+    void createStatusBar();
+    void readSettings();
+    void writeSettings();
+    bool maybeSave();
+    void loadFile(const QString &fileName);
+    bool saveFile(const QString &fileName);
+    void setCurrentFile(const QString &fileName);
+    QString strippedName(const QString &fullFileName);
+    MainWindow *findMainWindow(const QString &fileName);
+
+    QTextEdit *textEdit;
+    QString curFile;
+    bool isUntitled;
+
+    QMenu *fileMenu;
+    QMenu *editMenu;
+    QMenu *helpMenu;
+    QToolBar *fileToolBar;
+    QToolBar *editToolBar;
+    QAction *newAct;
+    QAction *openAct;
+    QAction *saveAct;
+    QAction *saveAsAct;
+    QAction *closeAct;
+    QAction *exitAct;
+    QAction *cutAct;
+    QAction *copyAct;
+    QAction *pasteAct;
+    QAction *aboutAct;
+    QAction *aboutQtAct;
+};
+
+#endif
diff --git a/examples/mainwindows/sdi/sdi.pro b/examples/mainwindows/sdi/sdi.pro
new file mode 100644
index 0000000..3283334
--- /dev/null
+++ b/examples/mainwindows/sdi/sdi.pro
@@ -0,0 +1,10 @@
+HEADERS       = mainwindow.h
+SOURCES       = main.cpp \
+                mainwindow.cpp
+RESOURCES     = sdi.qrc
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/sdi
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS sdi.pro images
+sources.path = $$[QT_INSTALL_EXAMPLES]/mainwindows/sdi
+INSTALLS += target sources
diff --git a/examples/mainwindows/sdi/sdi.qrc b/examples/mainwindows/sdi/sdi.qrc
new file mode 100644
index 0000000..0a776fa
--- /dev/null
+++ b/examples/mainwindows/sdi/sdi.qrc
@@ -0,0 +1,10 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>images/copy.png</file>
+    <file>images/cut.png</file>
+    <file>images/new.png</file>
+    <file>images/open.png</file>
+    <file>images/paste.png</file>
+    <file>images/save.png</file>
+</qresource>
+</RCC>