mainwindow.cpp Example File

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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);
    setCentralWidget(treeWidget);
    createActions();
    createMenus();
    statusBar()->showMessage(tr("Ready"));
    setWindowTitle(tr("SAX Bookmarks"));
    resize(480, 320);
}
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(fileName)
                             .arg(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(fileName)
                             .arg(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::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()));
}
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);
}