qt5base-lts/examples/xml/streambookmarks/mainwindow.cpp

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

//! [0]
MainWindow::MainWindow()
{
    QStringList labels;
    labels << tr("Title") << tr("Location");

    treeWidget = new QTreeWidget;
    treeWidget->header()->setSectionResizeMode(QHeaderView::Stretch);
    treeWidget->setHeaderLabels(labels);
    setCentralWidget(treeWidget);

    createActions();
    createMenus();

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

    setWindowTitle(tr("QXmlStream Bookmarks"));
    resize(480, 320);
}
//! [0]

//! [1]
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(fileName)
                             .arg(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(fileName)
                             .arg(reader.errorString()));
    } else {
        statusBar()->showMessage(tr("File loaded"), 2000);
    }

}
//! [1]

//! [2]
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(fileName)
                             .arg(file.errorString()));
        return;
    }

    XbelWriter writer(treeWidget);
    if (writer.writeFile(&file))
        statusBar()->showMessage(tr("File saved"), 2000);
}
//! [2]

//! [3]
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."));
}
//! [3]

//! [4]
void MainWindow::createActions()
{
    openAct = new QAction(tr("&Open..."), this);
    openAct->setShortcuts(QKeySequence::Open);
    connect(openAct, SIGNAL(triggered()), this, SLOT(open()));

    saveAsAct = new QAction(tr("&Save As..."), this);
    saveAsAct->setShortcuts(QKeySequence::SaveAs);
    connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));

    exitAct = new QAction(tr("E&xit"), this);
    exitAct->setShortcuts(QKeySequence::Quit);
    connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));

    aboutAct = new QAction(tr("&About"), this);
    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));

    aboutQtAct = new QAction(tr("About &Qt"), this);
    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
}
//! [4]

//! [5]
void MainWindow::createMenus()
{
    fileMenu = menuBar()->addMenu(tr("&File"));
    fileMenu->addAction(openAct);
    fileMenu->addAction(saveAsAct);
    fileMenu->addAction(exitAct);

    menuBar()->addSeparator();

    helpMenu = menuBar()->addMenu(tr("&Help"));
    helpMenu->addAction(aboutAct);
    helpMenu->addAction(aboutQtAct);
}
//! [5]