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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 397 insertions, 0 deletions

diff --git a/examples/mainwindows/mdi/mainwindow.cpp b/examples/mainwindows/mdi/mainwindow.cpp
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--- /dev/null
+++ b/examples/mainwindows/mdi/mainwindow.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "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 (mdiArea->currentSubWindow()) {
+        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->setShortcuts(QKeySequence::Quit);
+    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->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));
+}