xbelreader.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation ([email protected])
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QtGui>

 #include "xbelreader.h"

 XbelReader::XbelReader(QTreeWidget *treeWidget)
     : treeWidget(treeWidget)
 {
     QStyle *style = treeWidget->style();

     folderIcon.addPixmap(style->standardPixmap(QStyle::SP_DirClosedIcon),
                          QIcon::Normal, QIcon::Off);
     folderIcon.addPixmap(style->standardPixmap(QStyle::SP_DirOpenIcon),
                          QIcon::Normal, QIcon::On);
     bookmarkIcon.addPixmap(style->standardPixmap(QStyle::SP_FileIcon));
 }

 bool XbelReader::read(QIODevice *device)
 {
     xml.setDevice(device);

     if (xml.readNextStartElement()) {
         if (xml.name() == "xbel" && xml.attributes().value("version") == "1.0")
             readXBEL();
         else
             xml.raiseError(QObject::tr("The file is not an XBEL version 1.0 file."));
     }

     return !xml.error();
 }

 QString XbelReader::errorString() const
 {
     return QObject::tr("%1\nLine %2, column %3")
             .arg(xml.errorString())
             .arg(xml.lineNumber())
             .arg(xml.columnNumber());
 }

 void XbelReader::readXBEL()
 {
     Q_ASSERT(xml.isStartElement() && xml.name() == "xbel");

     while (xml.readNextStartElement()) {
         if (xml.name() == "folder")
             readFolder(0);
         else if (xml.name() == "bookmark")
             readBookmark(0);
         else if (xml.name() == "separator")
             readSeparator(0);
         else
             xml.skipCurrentElement();
     }
 }

 void XbelReader::readTitle(QTreeWidgetItem *item)
 {
     Q_ASSERT(xml.isStartElement() && xml.name() == "title");

     QString title = xml.readElementText();
     item->setText(0, title);
 }

 void XbelReader::readSeparator(QTreeWidgetItem *item)
 {
     Q_ASSERT(xml.isStartElement() && xml.name() == "separator");

     QTreeWidgetItem *separator = createChildItem(item);
     separator->setFlags(item->flags() & ~Qt::ItemIsSelectable);
     separator->setText(0, QString(30, 0xB7));
     xml.skipCurrentElement();
 }

 void XbelReader::readFolder(QTreeWidgetItem *item)
 {
     Q_ASSERT(xml.isStartElement() && xml.name() == "folder");

     QTreeWidgetItem *folder = createChildItem(item);
     bool folded = (xml.attributes().value("folded") != "no");
     treeWidget->setItemExpanded(folder, !folded);

     while (xml.readNextStartElement()) {
         if (xml.name() == "title")
             readTitle(folder);
         else if (xml.name() == "folder")
             readFolder(folder);
         else if (xml.name() == "bookmark")
             readBookmark(folder);
         else if (xml.name() == "separator")
             readSeparator(folder);
         else
             xml.skipCurrentElement();
     }
 }

 void XbelReader::readBookmark(QTreeWidgetItem *item)
 {
     Q_ASSERT(xml.isStartElement() && xml.name() == "bookmark");

     QTreeWidgetItem *bookmark = createChildItem(item);
     bookmark->setFlags(bookmark->flags() | Qt::ItemIsEditable);
     bookmark->setIcon(0, bookmarkIcon);
     bookmark->setText(0, QObject::tr("Unknown title"));
     bookmark->setText(1, xml.attributes().value("href").toString());

     while (xml.readNextStartElement()) {
         if (xml.name() == "title")
             readTitle(bookmark);
         else
             xml.skipCurrentElement();
     }
 }

 QTreeWidgetItem *XbelReader::createChildItem(QTreeWidgetItem *item)
 {
     QTreeWidgetItem *childItem;
     if (item) {
         childItem = new QTreeWidgetItem(item);
     } else {
         childItem = new QTreeWidgetItem(treeWidget);
     }
     childItem->setData(0, Qt::UserRole, xml.name().toString());
     return childItem;
 }