diff options
Diffstat (limited to 'examples/widgets/mainwindows/mdi/mainwindow.cpp')
-rw-r--r-- | examples/widgets/mainwindows/mdi/mainwindow.cpp | 334 |
1 files changed, 211 insertions, 123 deletions
diff --git a/examples/widgets/mainwindows/mdi/mainwindow.cpp b/examples/widgets/mainwindows/mdi/mainwindow.cpp index 83ffbf6557..35136c81c4 100644 --- a/examples/widgets/mainwindows/mdi/mainwindow.cpp +++ b/examples/widgets/mainwindows/mdi/mainwindow.cpp @@ -44,20 +44,15 @@ #include "mdichild.h" MainWindow::MainWindow() + : mdiArea(new QMdiArea) { - 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*))); + connect(mdiArea, &QMdiArea::subWindowActivated, + this, &MainWindow::updateMenus); createActions(); - createMenus(); - createToolBars(); createStatusBar(); updateMenus(); @@ -87,20 +82,24 @@ void MainWindow::newFile() void MainWindow::open() { - QString fileName = QFileDialog::getOpenFileName(this); - if (!fileName.isEmpty()) { - QMdiSubWindow *existing = findMdiChild(fileName); - if (existing) { - mdiArea->setActiveSubWindow(existing); - return; - } + const QString fileName = QFileDialog::getOpenFileName(this); + if (!fileName.isEmpty()) + openFile(fileName); +} - if (openFile(fileName)) - statusBar()->showMessage(tr("File loaded"), 2000); +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::openFile(const QString &fileName) +bool MainWindow::loadFile(const QString &fileName) { MdiChild *child = createMdiChild(); const bool succeeded = child->loadFile(fileName); @@ -108,9 +107,87 @@ bool MainWindow::openFile(const QString &fileName) 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()) @@ -119,8 +196,11 @@ void MainWindow::save() void MainWindow::saveAs() { - if (activeMdiChild() && activeMdiChild()->saveAs()) + MdiChild *child = activeMdiChild(); + if (child && child->saveAs()) { statusBar()->showMessage(tr("File saved"), 2000); + MainWindow::prependToRecentFiles(child->currentFile()); + } } #ifndef QT_NO_CLIPBOARD @@ -164,7 +244,7 @@ void MainWindow::updateMenus() cascadeAct->setEnabled(hasMdiChild); nextAct->setEnabled(hasMdiChild); previousAct->setEnabled(hasMdiChild); - separatorAct->setVisible(hasMdiChild); + windowMenuSeparatorAct->setVisible(hasMdiChild); #ifndef QT_NO_CLIPBOARD bool hasSelection = (activeMdiChild() && @@ -174,6 +254,16 @@ void MainWindow::updateMenus() #endif } +class ActiveMdiSubWindowFunctor { +public: + explicit ActiveMdiSubWindowFunctor(QMdiArea *mdiArea, QMdiSubWindow *activeWindow) : m_mdiArea(mdiArea), m_activeWindow(activeWindow) {} + void operator()() const { m_mdiArea->setActiveSubWindow(m_activeWindow); } + +private: + QMdiArea *m_mdiArea; + QMdiSubWindow *m_activeWindow; +}; + void MainWindow::updateWindowMenu() { windowMenu->clear(); @@ -185,13 +275,14 @@ void MainWindow::updateWindowMenu() windowMenu->addSeparator(); windowMenu->addAction(nextAct); windowMenu->addAction(previousAct); - windowMenu->addAction(separatorAct); + windowMenu->addAction(windowMenuSeparatorAct); QList<QMdiSubWindow *> windows = mdiArea->subWindowList(); - separatorAct->setVisible(!windows.isEmpty()); + windowMenuSeparatorAct->setVisible(!windows.isEmpty()); for (int i = 0; i < windows.size(); ++i) { - MdiChild *child = qobject_cast<MdiChild *>(windows.at(i)->widget()); + QMdiSubWindow *mdiSubWindow = windows.at(i); + MdiChild *child = qobject_cast<MdiChild *>(mdiSubWindow->widget()); QString text; if (i < 9) { @@ -201,11 +292,9 @@ void MainWindow::updateWindowMenu() text = tr("%1 %2").arg(i + 1) .arg(child->userFriendlyCurrentFile()); } - QAction *action = windowMenu->addAction(text); + QAction *action = windowMenu->addAction(text, mdiSubWindow, ActiveMdiSubWindowFunctor(mdiArea, mdiSubWindow)); action->setCheckable(true); action ->setChecked(child == activeMdiChild()); - connect(action, SIGNAL(triggered()), windowMapper, SLOT(map())); - windowMapper->setMapping(action, windows.at(i)); } } @@ -215,10 +304,8 @@ MdiChild *MainWindow::createMdiChild() mdiArea->addSubWindow(child); #ifndef QT_NO_CLIPBOARD - connect(child, SIGNAL(copyAvailable(bool)), - cutAct, SLOT(setEnabled(bool))); - connect(child, SIGNAL(copyAvailable(bool)), - copyAct, SLOT(setEnabled(bool))); + connect(child, &QTextEdit::copyAvailable, cutAct, &QAction::setEnabled); + connect(child, &QTextEdit::copyAvailable, copyAct, &QAction::setEnabled); #endif return child; @@ -226,139 +313,143 @@ MdiChild *MainWindow::createMdiChild() void MainWindow::createActions() { - newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this); + 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, SIGNAL(triggered()), this, SLOT(newFile())); + connect(newAct, &QAction::triggered, this, &MainWindow::newFile); + fileMenu->addAction(newAct); + fileToolBar->addAction(newAct); - openAct = new QAction(QIcon(":/images/open.png"), tr("&Open..."), this); + 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, SIGNAL(triggered()), this, SLOT(open())); + connect(openAct, &QAction::triggered, this, &MainWindow::open); + fileMenu->addAction(openAct); + fileToolBar->addAction(openAct); - saveAct = new QAction(QIcon(":/images/save.png"), tr("&Save"), this); + 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, SIGNAL(triggered()), this, SLOT(save())); + connect(saveAct, &QAction::triggered, this, &MainWindow::save); + fileToolBar->addAction(saveAct); - saveAsAct = new QAction(tr("Save &As..."), this); + 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, SIGNAL(triggered()), this, SLOT(saveAs())); + 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] - exitAct = new QAction(tr("E&xit"), this); + 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")); - connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows())); + fileMenu->addAction(exitAct); //! [0] #ifndef QT_NO_CLIPBOARD - cutAct = new QAction(QIcon(":/images/cut.png"), tr("Cu&t"), this); + 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, SIGNAL(triggered()), this, SLOT(cut())); + connect(cutAct, &QAction::triggered, this, &MainWindow::cut); + editMenu->addAction(cutAct); + editToolBar->addAction(cutAct); - copyAct = new QAction(QIcon(":/images/copy.png"), tr("&Copy"), this); + 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, SIGNAL(triggered()), this, SLOT(copy())); + connect(copyAct, &QAction::triggered, this, &MainWindow::copy); + editMenu->addAction(copyAct); + editToolBar->addAction(copyAct); - pasteAct = new QAction(QIcon(":/images/paste.png"), tr("&Paste"), this); + 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, SIGNAL(triggered()), this, SLOT(paste())); + 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, SIGNAL(triggered()), - mdiArea, SLOT(closeActiveSubWindow())); + connect(closeAct, &QAction::triggered, + mdiArea, &QMdiArea::closeActiveSubWindow); closeAllAct = new QAction(tr("Close &All"), this); closeAllAct->setStatusTip(tr("Close all the windows")); - connect(closeAllAct, SIGNAL(triggered()), - mdiArea, SLOT(closeAllSubWindows())); + connect(closeAllAct, &QAction::triggered, mdiArea, &QMdiArea::closeAllSubWindows); tileAct = new QAction(tr("&Tile"), this); tileAct->setStatusTip(tr("Tile the windows")); - connect(tileAct, SIGNAL(triggered()), mdiArea, SLOT(tileSubWindows())); + connect(tileAct, &QAction::triggered, mdiArea, &QMdiArea::tileSubWindows); cascadeAct = new QAction(tr("&Cascade"), this); cascadeAct->setStatusTip(tr("Cascade the windows")); - connect(cascadeAct, SIGNAL(triggered()), mdiArea, SLOT(cascadeSubWindows())); + 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, SIGNAL(triggered()), - mdiArea, SLOT(activateNextSubWindow())); + 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, 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); + connect(previousAct, &QAction::triggered, mdiArea, &QMdiArea::activatePreviousSubWindow); - editMenu = menuBar()->addMenu(tr("&Edit")); -#ifndef QT_NO_CLIPBOARD - editMenu->addAction(cutAct); - editMenu->addAction(copyAct); - editMenu->addAction(pasteAct); -#endif + windowMenuSeparatorAct = new QAction(this); + windowMenuSeparatorAct->setSeparator(true); - 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); -} + QMenu *helpMenu = menuBar()->addMenu(tr("&Help")); -void MainWindow::createToolBars() -{ - fileToolBar = addToolBar(tr("File")); - fileToolBar->addAction(newAct); - fileToolBar->addAction(openAct); - fileToolBar->addAction(saveAct); + QAction *aboutAct = helpMenu->addAction(tr("&About"), this, &MainWindow::about); + aboutAct->setStatusTip(tr("Show the application's About box")); -#ifndef QT_NO_CLIPBOARD - editToolBar = addToolBar(tr("Edit")); - editToolBar->addAction(cutAct); - editToolBar->addAction(copyAct); - editToolBar->addAction(pasteAct); -#endif + QAction *aboutQtAct = helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt); + aboutQtAct->setStatusTip(tr("Show the Qt library's About box")); } void MainWindow::createStatusBar() @@ -368,28 +459,32 @@ void MainWindow::createStatusBar() void MainWindow::readSettings() { - QSettings settings("QtProject", "MDI Example"); - QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint(); - QSize size = settings.value("size", QSize(400, 400)).toSize(); - move(pos); - resize(size); + QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName()); + const QByteArray geometry = settings.value("geometry", QByteArray()).toByteArray(); + if (geometry.isEmpty()) { + const QRect availableGeometry = QApplication::desktop()->availableGeometry(this); + resize(availableGeometry.width() / 3, availableGeometry.height() / 2); + move((availableGeometry.width() - width()) / 2, + (availableGeometry.height() - height()) / 2); + } else { + restoreGeometry(geometry); + } } void MainWindow::writeSettings() { - QSettings settings("QtProject", "MDI Example"); - settings.setValue("pos", pos()); - settings.setValue("size", size()); + QSettings settings(QCoreApplication::organizationName(), QCoreApplication::applicationName()); + settings.setValue("geometry", saveGeometry()); } -MdiChild *MainWindow::activeMdiChild() +MdiChild *MainWindow::activeMdiChild() const { if (QMdiSubWindow *activeSubWindow = mdiArea->activeSubWindow()) return qobject_cast<MdiChild *>(activeSubWindow->widget()); return 0; } -QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName) +QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName) const { QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath(); @@ -404,14 +499,7 @@ QMdiSubWindow *MainWindow::findMdiChild(const QString &fileName) void MainWindow::switchLayoutDirection() { if (layoutDirection() == Qt::LeftToRight) - qApp->setLayoutDirection(Qt::RightToLeft); + QGuiApplication::setLayoutDirection(Qt::RightToLeft); else - qApp->setLayoutDirection(Qt::LeftToRight); -} - -void MainWindow::setActiveSubWindow(QWidget *window) -{ - if (!window) - return; - mdiArea->setActiveSubWindow(qobject_cast<QMdiSubWindow *>(window)); + QGuiApplication::setLayoutDirection(Qt::LeftToRight); } |