1 files changed, 476 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/mainwindows/mdi/mainwindow.cpp b/tests/manual/examples/widgets/mainwindows/mdi/mainwindow.cpp
new file mode 100644
index 0000000000..c0f9091002
--- /dev/null
+++ b/tests/manual/examples/widgets/mainwindows/mdi/mainwindow.cpp
@@ -0,0 +1,476 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QtWidgets>
+
+#include "mainwindow.h"
+#include "mdichild.h"
+
+MainWindow::MainWindow()
+    : mdiArea(new QMdiArea)
+{
+    mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+    mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+    setCentralWidget(mdiArea);
+    connect(mdiArea, &QMdiArea::subWindowActivated,
+            this, &MainWindow::updateMenus);
+
+    createActions();
+    createStatusBar();
+    updateMenus();
+
+    readSettings();
+
+    setWindowTitle(tr("MDI"));
+    setUnifiedTitleAndToolBarOnMac(true);
+}
+
+void MainWindow::closeEvent(QCloseEvent *event)
+{
+    mdiArea->closeAllSubWindows();
+    if (mdiArea->currentSubWindow()) {
+        event->ignore();
+    } else {
+        writeSettings();
+        event->accept();
+    }
+}
+
+void MainWindow::newFile()
+{
+    MdiChild *child = createMdiChild();
+    child->newFile();
+    child->show();
+}
+
+void MainWindow::open()
+{
+    const QString fileName = QFileDialog::getOpenFileName(this);
+    if (!fileName.isEmpty())
+        openFile(fileName);
+}
+
+bool MainWindow::openFile(const QString &fileName)
+{
+    if (QMdiSubWindow *existing = findMdiChild(fileName)) {
+        mdiArea->setActiveSubWindow(existing);
+        return true;
+    }
+    const bool succeeded = loadFile(fileName);
+    if (succeeded)
+        statusBar()->showMessage(tr("File loaded"), 2000);
+    return succeeded;
+}
+
+bool MainWindow::loadFile(const QString &fileName)
+{
+    MdiChild *child = createMdiChild();
+    const bool succeeded = child->loadFile(fileName);
+    if (succeeded)
+        child->show();
+    else
+        child->close();
+    MainWindow::prependToRecentFiles(fileName);
+    return succeeded;
+}
+
+void MainWindow::newSubWindow()
+{
+    MdiChild *child = createMdiChild(static_cast<MdiChild *>(mdiArea->activeSubWindow()->widget()));
+    child->show();
+}
+
+static inline QString recentFilesKey() { return QStringLiteral("recentFileList"); }
+static inline QString fileKey() { return QStringLiteral("file"); }
+
+static QStringList readRecentFiles(QSettings &settings)
+{
+    QStringList result;
+    const int count = settings.beginReadArray(recentFilesKey());
+    for (int i = 0; i < count; ++i) {
+        settings.setArrayIndex(i);
+        result.append(settings.value(fileKey()).toString());
+    }
+    settings.endArray();
+    return result;
+}
+
+static void writeRecentFiles(const QStringList &files, QSettings &settings)
+{
+    const int count = files.size();
+    settings.beginWriteArray(recentFilesKey());
+    for (int i = 0; i < count; ++i) {
+        settings.setArrayIndex(i);
+        settings.setValue(fileKey(), files.at(i));
+    }
+    settings.endArray();
+}
+
+bool MainWindow::hasRecentFiles()
+{
+    QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+    const int count = settings.beginReadArray(recentFilesKey());
+    settings.endArray();
+    return count > 0;
+}
+
+void MainWindow::prependToRecentFiles(const QString &fileName)
+{
+    QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+
+    const QStringList oldRecentFiles = readRecentFiles(settings);
+    QStringList recentFiles = oldRecentFiles;
+    recentFiles.removeAll(fileName);
+    recentFiles.prepend(fileName);
+    if (oldRecentFiles != recentFiles)
+        writeRecentFiles(recentFiles, settings);
+
+    setRecentFilesVisible(!recentFiles.isEmpty());
+}
+
+void MainWindow::setRecentFilesVisible(bool visible)
+{
+    recentFileSubMenuAct->setVisible(visible);
+    recentFileSeparator->setVisible(visible);
+}
+
+void MainWindow::updateRecentFileActions()
+{
+    QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+
+    const QStringList recentFiles = readRecentFiles(settings);
+    const int count = qMin(int(MaxRecentFiles), recentFiles.size());
+    int i = 0;
+    for ( ; i < count; ++i) {
+        const QString fileName = QFileInfo(recentFiles.at(i)).fileName();
+        recentFileActs[i]->setText(tr("&%1 %2").arg(i + 1).arg(fileName));
+        recentFileActs[i]->setData(recentFiles.at(i));
+        recentFileActs[i]->setVisible(true);
+    }
+    for ( ; i < MaxRecentFiles; ++i)
+        recentFileActs[i]->setVisible(false);
+}
+
+void MainWindow::openRecentFile()
+{
+    if (const QAction *action = qobject_cast<const QAction *>(sender()))
+        openFile(action->data().toString());
+}
+
+void MainWindow::save()
+{
+    if (activeMdiChild() && activeMdiChild()->save())
+        statusBar()->showMessage(tr("File saved"), 2000);
+}
+
+void MainWindow::saveAs()
+{
+    MdiChild *child = activeMdiChild();
+    if (child && child->saveAs()) {
+        statusBar()->showMessage(tr("File saved"), 2000);
+        MainWindow::prependToRecentFiles(child->currentFile());
+    }
+}
+
+#ifndef QT_NO_CLIPBOARD
+void MainWindow::cut()
+{
+    if (activeMdiChild())
+        activeMdiChild()->cut();
+}
+
+void MainWindow::copy()
+{
+    if (activeMdiChild())
+        activeMdiChild()->copy();
+}
+
+void MainWindow::paste()
+{
+    if (activeMdiChild())
+        activeMdiChild()->paste();
+}
+#endif
+
+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() != nullptr);
+    saveAct->setEnabled(hasMdiChild);
+    saveAsAct->setEnabled(hasMdiChild);
+#ifndef QT_NO_CLIPBOARD
+    pasteAct->setEnabled(hasMdiChild);
+#endif
+    newWindowAct->setEnabled(hasMdiChild);
+    closeAct->setEnabled(hasMdiChild);
+    closeAllAct->setEnabled(hasMdiChild);
+    tileAct->setEnabled(hasMdiChild);
+    cascadeAct->setEnabled(hasMdiChild);
+    nextAct->setEnabled(hasMdiChild);
+    previousAct->setEnabled(hasMdiChild);
+    windowMenuSeparatorAct->setVisible(hasMdiChild);
+
+#ifndef QT_NO_CLIPBOARD
+    bool hasSelection = (activeMdiChild() &&
+                         activeMdiChild()->textCursor().hasSelection());
+    cutAct->setEnabled(hasSelection);
+    copyAct->setEnabled(hasSelection);
+#endif
+}
+
+void MainWindow::updateWindowMenu()
+{
+    windowMenu->clear();
+    windowMenu->addAction(newWindowAct);
+    windowMenu->addAction(closeAct);
+    windowMenu->addAction(closeAllAct);
+    windowMenu->addSeparator();
+    windowMenu->addAction(tileAct);
+    windowMenu->addAction(cascadeAct);
+    windowMenu->addSeparator();
+    windowMenu->addAction(nextAct);
+    windowMenu->addAction(previousAct);
+    windowMenu->addAction(windowMenuSeparatorAct);
+
+    QList<QMdiSubWindow *> windows = mdiArea->subWindowList();
+    windowMenuSeparatorAct->setVisible(!windows.isEmpty());
+
+    for (int i = 0; i < windows.size(); ++i) {
+        QMdiSubWindow *mdiSubWindow = windows.at(i);
+        MdiChild *child = qobject_cast<MdiChild *>(mdiSubWindow->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, mdiSubWindow, [this, mdiSubWindow]() {
+            mdiArea->setActiveSubWindow(mdiSubWindow);
+        });
+        action->setCheckable(true);
+        action ->setChecked(child == activeMdiChild());
+    }
+}
+
+MdiChild *MainWindow::createMdiChild(MdiChild *other)
+{
+    MdiChild *child = new MdiChild(other);
+    mdiArea->addSubWindow(child);
+
+#ifndef QT_NO_CLIPBOARD
+    connect(child, &QTextEdit::copyAvailable, cutAct, &QAction::setEnabled);
+    connect(child, &QTextEdit::copyAvailable, copyAct, &QAction::setEnabled);
+#endif
+
+    return child;
+}
+
+void MainWindow::createActions()
+{
+    QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
+    QToolBar *fileToolBar = addToolBar(tr("File"));
+
+    const QIcon newIcon = QIcon::fromTheme("document-new", QIcon(":/images/new.png"));
+    newAct = new QAction(newIcon, tr("&New"), this);
+    newAct->setShortcuts(QKeySequence::New);
+    newAct->setStatusTip(tr("Create a new file"));
+    connect(newAct, &QAction::triggered, this, &MainWindow::newFile);
+    fileMenu->addAction(newAct);
+    fileToolBar->addAction(newAct);
+
+//! [qaction setup]
+    const QIcon openIcon = QIcon::fromTheme("document-open", QIcon(":/images/open.png"));
+    QAction *openAct = new QAction(openIcon, tr("&Open..."), this);
+    openAct->setShortcuts(QKeySequence::Open);
+    openAct->setStatusTip(tr("Open an existing file"));
+    connect(openAct, &QAction::triggered, this, &MainWindow::open);
+    fileMenu->addAction(openAct);
+    fileToolBar->addAction(openAct);
+//! [qaction setup]
+
+    const QIcon saveIcon = QIcon::fromTheme("document-save", QIcon(":/images/save.png"));
+    saveAct = new QAction(saveIcon, tr("&Save"), this);
+    saveAct->setShortcuts(QKeySequence::Save);
+    saveAct->setStatusTip(tr("Save the document to disk"));
+    connect(saveAct, &QAction::triggered, this, &MainWindow::save);
+    fileToolBar->addAction(saveAct);
+
+    const QIcon saveAsIcon = QIcon::fromTheme("document-save-as");
+    saveAsAct = new QAction(saveAsIcon, tr("Save &As..."), this);
+    saveAsAct->setShortcuts(QKeySequence::SaveAs);
+    saveAsAct->setStatusTip(tr("Save the document under a new name"));
+    connect(saveAsAct, &QAction::triggered, this, &MainWindow::saveAs);
+    fileMenu->addAction(saveAsAct);
+
+    fileMenu->addSeparator();
+
+    QMenu *recentMenu = fileMenu->addMenu(tr("Recent..."));
+    connect(recentMenu, &QMenu::aboutToShow, this, &MainWindow::updateRecentFileActions);
+    recentFileSubMenuAct = recentMenu->menuAction();
+
+    for (int i = 0; i < MaxRecentFiles; ++i) {
+        recentFileActs[i] = recentMenu->addAction(QString(), this, &MainWindow::openRecentFile);
+        recentFileActs[i]->setVisible(false);
+    }
+
+    recentFileSeparator = fileMenu->addSeparator();
+
+    setRecentFilesVisible(MainWindow::hasRecentFiles());
+
+    fileMenu->addAction(tr("Switch layout direction"), this, &MainWindow::switchLayoutDirection);
+
+    fileMenu->addSeparator();
+
+//! [0]
+    const QIcon exitIcon = QIcon::fromTheme("application-exit");
+    QAction *exitAct = fileMenu->addAction(exitIcon, tr("E&xit"), qApp, &QApplication::quit);
+    exitAct->setShortcuts(QKeySequence::Quit);
+    exitAct->setStatusTip(tr("Exit the application"));
+    fileMenu->addAction(exitAct);
+//! [0]
+
+#ifndef QT_NO_CLIPBOARD
+    QMenu *editMenu = menuBar()->addMenu(tr("&Edit"));
+    QToolBar *editToolBar = addToolBar(tr("Edit"));
+
+    const QIcon cutIcon = QIcon::fromTheme("edit-cut", QIcon(":/images/cut.png"));
+    cutAct = new QAction(cutIcon, tr("Cu&t"), this);
+    cutAct->setShortcuts(QKeySequence::Cut);
+    cutAct->setStatusTip(tr("Cut the current selection's contents to the "
+                            "clipboard"));
+    connect(cutAct, &QAction::triggered, this, &MainWindow::cut);
+    editMenu->addAction(cutAct);
+    editToolBar->addAction(cutAct);
+
+    const QIcon copyIcon = QIcon::fromTheme("edit-copy", QIcon(":/images/copy.png"));
+    copyAct = new QAction(copyIcon, tr("&Copy"), this);
+    copyAct->setShortcuts(QKeySequence::Copy);
+    copyAct->setStatusTip(tr("Copy the current selection's contents to the "
+                             "clipboard"));
+    connect(copyAct, &QAction::triggered, this, &MainWindow::copy);
+    editMenu->addAction(copyAct);
+    editToolBar->addAction(copyAct);
+
+    const QIcon pasteIcon = QIcon::fromTheme("edit-paste", QIcon(":/images/paste.png"));
+    pasteAct = new QAction(pasteIcon, tr("&Paste"), this);
+    pasteAct->setShortcuts(QKeySequence::Paste);
+    pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
+                              "selection"));
+    connect(pasteAct, &QAction::triggered, this, &MainWindow::paste);
+    editMenu->addAction(pasteAct);
+    editToolBar->addAction(pasteAct);
+#endif
+
+    windowMenu = menuBar()->addMenu(tr("&Window"));
+    connect(windowMenu, &QMenu::aboutToShow, this, &MainWindow::updateWindowMenu);
+
+    newWindowAct = new QAction(tr("&New view"), this);
+    newWindowAct->setStatusTip(tr("Make another window viewing the same document"));
+    connect(newWindowAct, &QAction::triggered,
+            this, &MainWindow::newSubWindow);
+
+    closeAct = new QAction(tr("Cl&ose"), this);
+    closeAct->setStatusTip(tr("Close the active window"));
+    connect(closeAct, &QAction::triggered,
+            mdiArea, &QMdiArea::closeActiveSubWindow);
+
+    closeAllAct = new QAction(tr("Close &All"), this);
+    closeAllAct->setStatusTip(tr("Close all the windows"));
+    connect(closeAllAct, &QAction::triggered, mdiArea, &QMdiArea::closeAllSubWindows);
+
+    tileAct = new QAction(tr("&Tile"), this);
+    tileAct->setStatusTip(tr("Tile the windows"));
+    connect(tileAct, &QAction::triggered, mdiArea, &QMdiArea::tileSubWindows);
+
+    cascadeAct = new QAction(tr("&Cascade"), this);
+    cascadeAct->setStatusTip(tr("Cascade the windows"));
+    connect(cascadeAct, &QAction::triggered, mdiArea, &QMdiArea::cascadeSubWindows);
+
+    nextAct = new QAction(tr("Ne&xt"), this);
+    nextAct->setShortcuts(QKeySequence::NextChild);
+    nextAct->setStatusTip(tr("Move the focus to the next window"));
+    connect(nextAct, &QAction::triggered, mdiArea, &QMdiArea::activateNextSubWindow);
+
+    previousAct = new QAction(tr("Pre&vious"), this);
+    previousAct->setShortcuts(QKeySequence::PreviousChild);
+    previousAct->setStatusTip(tr("Move the focus to the previous "
+                                 "window"));
+    connect(previousAct, &QAction::triggered, mdiArea, &QMdiArea::activatePreviousSubWindow);
+
+    windowMenuSeparatorAct = new QAction(this);
+    windowMenuSeparatorAct->setSeparator(true);
+
+    updateWindowMenu();
+
+    menuBar()->addSeparator();
+
+    QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
+
+    QAction *aboutAct = helpMenu->addAction(tr("&About"), this, &MainWindow::about);
+    aboutAct->setStatusTip(tr("Show the application's About box"));
+
+    QAction *aboutQtAct = helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
+    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+}
+
+void MainWindow::createStatusBar()
+{
+    statusBar()->showMessage(tr("Ready"));
+}
+
+void MainWindow::readSettings()
+{
+    QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+    const QByteArray geometry = settings.value("geometry", QByteArray()).toByteArray();
+    if (geometry.isEmpty()) {
+        const QRect availableGeometry = screen()->availableGeometry();
+        resize(availableGeometry.width() / 3, availableGeometry.height() / 2);
+        move((availableGeometry.width() - width()) / 2,
+             (availableGeometry.height() - height()) / 2);
+    } else {
+        restoreGeometry(geometry);
+    }
+}
+
+void MainWindow::writeSettings()
+{
+    QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName());
+    settings.setValue("geometry", saveGeometry());
+}
+
+MdiChild *MainWindow::activeMdiChild() const
+{
+    if (QMdiSubWindow *activeSubWindow = mdiArea->activeSubWindow())
+        return qobject_cast<MdiChild *>(activeSubWindow->widget());
+    return nullptr;
+}
+
+QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName) const
+{
+    QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath();
+
+    const QList<QMdiSubWindow *> subWindows = mdiArea->subWindowList();
+    for (QMdiSubWindow *window : subWindows) {
+        MdiChild *mdiChild = qobject_cast<MdiChild *>(window->widget());
+        if (mdiChild->currentFile() == canonicalFilePath)
+            return window;
+    }
+    return nullptr;
+}
+
+void MainWindow::switchLayoutDirection()
+{
+    if (layoutDirection() == Qt::LeftToRight)
+        QGuiApplication::setLayoutDirection(Qt::RightToLeft);
+    else
+        QGuiApplication::setLayoutDirection(Qt::LeftToRight);
+}