| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
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| ** This file is part of the examples of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| #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; |
| } |
| |
| 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 |
| 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(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 *child = new MdiChild; |
| 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); |
| |
| 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); |
| |
| 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::closeAllWindows); |
| 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); |
| |
| 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); |
| } |