mainwindow.cpp Example File

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 #include <QtWidgets>

 #include "mainwindow.h"
 #include "xbelreader.h"
 #include "xbelwriter.h"

 MainWindow::MainWindow()
 {
     QStringList labels;
     labels << tr("Title") << tr("Location");

     treeWidget = new QTreeWidget;
     treeWidget->header()->setSectionResizeMode(QHeaderView::Stretch);
     treeWidget->setHeaderLabels(labels);
 #if !defined(QT_NO_CONTEXTMENU) && !defined(QT_NO_CLIPBOARD)
     treeWidget->setContextMenuPolicy(Qt::CustomContextMenu);
     connect(treeWidget, &QWidget::customContextMenuRequested,
             this, &MainWindow::onCustomContextMenuRequested);
 #endif
     setCentralWidget(treeWidget);

     createMenus();

     statusBar()->showMessage(tr("Ready"));

     setWindowTitle(tr("QXmlStream Bookmarks"));
     const QSize availableSize = QApplication::desktop()->availableGeometry(this).size();
     resize(availableSize.width() / 2, availableSize.height() / 3);
 }

 #if !defined(QT_NO_CONTEXTMENU) && !defined(QT_NO_CLIPBOARD)
 void MainWindow::onCustomContextMenuRequested(const QPoint &pos)
 {
     const QTreeWidgetItem *item = treeWidget->itemAt(pos);
     if (!item)
         return;
     const QString url = item->text(1);
     QMenu contextMenu;
     QAction *copyAction = contextMenu.addAction(tr("Copy Link to Clipboard"));
     QAction *openAction = contextMenu.addAction(tr("Open"));
     QAction *action = contextMenu.exec(treeWidget->viewport()->mapToGlobal(pos));
     if (action == copyAction)
         QGuiApplication::clipboard()->setText(url);
     else if (action == openAction)
         QDesktopServices::openUrl(QUrl(url));
 }
 #endif // !QT_NO_CONTEXTMENU && !QT_NO_CLIPBOARD

 void MainWindow::open()
 {
     QString fileName =
             QFileDialog::getOpenFileName(this, tr("Open Bookmark File"),
                                          QDir::currentPath(),
                                          tr("XBEL Files (*.xbel *.xml)"));
     if (fileName.isEmpty())
         return;

     treeWidget->clear();

     QFile file(fileName);
     if (!file.open(QFile::ReadOnly | QFile::Text)) {
         QMessageBox::warning(this, tr("QXmlStream Bookmarks"),
                              tr("Cannot read file %1:\n%2.")
                              .arg(QDir::toNativeSeparators(fileName),
                                   file.errorString()));
         return;
     }

     XbelReader reader(treeWidget);
     if (!reader.read(&file)) {
         QMessageBox::warning(this, tr("QXmlStream Bookmarks"),
                              tr("Parse error in file %1:\n\n%2")
                              .arg(QDir::toNativeSeparators(fileName),
                                   reader.errorString()));
     } else {
         statusBar()->showMessage(tr("File loaded"), 2000);
     }

 }

 void MainWindow::saveAs()
 {
     QString fileName =
             QFileDialog::getSaveFileName(this, tr("Save Bookmark File"),
                                          QDir::currentPath(),
                                          tr("XBEL Files (*.xbel *.xml)"));
     if (fileName.isEmpty())
         return;

     QFile file(fileName);
     if (!file.open(QFile::WriteOnly | QFile::Text)) {
         QMessageBox::warning(this, tr("QXmlStream Bookmarks"),
                              tr("Cannot write file %1:\n%2.")
                              .arg(QDir::toNativeSeparators(fileName),
                                   file.errorString()));
         return;
     }

     XbelWriter writer(treeWidget);
     if (writer.writeFile(&file))
         statusBar()->showMessage(tr("File saved"), 2000);
 }

 void MainWindow::about()
 {
    QMessageBox::about(this, tr("About QXmlStream Bookmarks"),
             tr("The <b>QXmlStream Bookmarks</b> example demonstrates how to use Qt's "
                "QXmlStream classes to read and write XML documents."));
 }

 void MainWindow::createMenus()
 {
     QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
     QAction *openAct = fileMenu->addAction(tr("&Open..."), this, &MainWindow::open);
     openAct->setShortcuts(QKeySequence::Open);

     QAction *saveAsAct = fileMenu->addAction(tr("&Save As..."), this, &MainWindow::saveAs);
     saveAsAct->setShortcuts(QKeySequence::SaveAs);

     QAction *exitAct = fileMenu->addAction(tr("E&xit"), this, &QWidget::close);
     exitAct->setShortcuts(QKeySequence::Quit);

     menuBar()->addSeparator();

     QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
     helpMenu->addAction(tr("&About"), this, &MainWindow::about);
     helpMenu->addAction(tr("About &Qt"), qApp, &QCoreApplication::quit);
 }