Long live Qt 4.5!

13 files changed, 847 insertions, 0 deletions

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