/qtbase/examples/xml/saxbookmarks/mainwindow.cpp

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#include <QtWidgets>



#include "mainwindow.h"

#include "xbelgenerator.h"

#include "xbelhandler.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("SAX 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();



    XbelHandler handler(treeWidget);

    QXmlSimpleReader reader;

    reader.setContentHandler(&handler);

    reader.setErrorHandler(&handler);



    QFile file(fileName);

    if (!file.open(QFile::ReadOnly | QFile::Text)) {

        QMessageBox::warning(this, tr("SAX Bookmarks"),

                             tr("Cannot read file %1:\n%2.")

                             .arg(QDir::toNativeSeparators(fileName),

                                  file.errorString()));

        return;

    }



    QXmlInputSource xmlInputSource(&file);

    if (reader.parse(xmlInputSource))

        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("SAX Bookmarks"),

                             tr("Cannot write file %1:\n%2.")

                             .arg(QDir::toNativeSeparators(fileName),

                                  file.errorString()));

        return;

    }



    XbelGenerator generator(treeWidget);

    if (generator.write(&file))

        statusBar()->showMessage(tr("File saved"), 2000);

}



void MainWindow::about()

{

   QMessageBox::about(this, tr("About SAX Bookmarks"),

            tr("The <b>SAX Bookmarks</b> example demonstrates how to use Qt's "

               "SAX classes to read XML documents and how to generate XML by "

               "hand."));

}



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);

}