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# xbelreader.cpp Example File
xml/streambookmarks/xbelreader.cpp

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     ** This file is part of the example classes of the Qt Toolkit.
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     #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)
     {
         setDevice(device);

         while (!atEnd()) {
             readNext();

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

         return !error();
     }

     void XbelReader::readUnknownElement()
     {
         Q_ASSERT(isStartElement());

         while (!atEnd()) {
             readNext();

             if (isEndElement())
                 break;

             if (isStartElement())
                 readUnknownElement();
         }
     }

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

         while (!atEnd()) {
             readNext();

             if (isEndElement())
                 break;

             if (isStartElement()) {
                 if (name() == "folder")
                     readFolder(0);
                 else if (name() == "bookmark")
                     readBookmark(0);
                 else if (name() == "separator")
                     readSeparator(0);
                 else
                     readUnknownElement();
             }
         }
     }

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

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

     void XbelReader::readSeparator(QTreeWidgetItem *item)
     {
         QTreeWidgetItem *separator = createChildItem(item);
         separator->setFlags(item->flags() & ~Qt::ItemIsSelectable);
         separator->setText(0, QString(30, 0xB7));
         readElementText();
     }

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

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

         while (!atEnd()) {
             readNext();

             if (isEndElement())
                 break;

             if (isStartElement()) {
                 if (name() == "title")
                     readTitle(folder);
                 else if (name() == "folder")
                     readFolder(folder);
                 else if (name() == "bookmark")
                     readBookmark(folder);
                 else if (name() == "separator")
                     readSeparator(folder);
                 else
                     readUnknownElement();
             }
         }
     }

     void XbelReader::readBookmark(QTreeWidgetItem *item)
     {
         Q_ASSERT(isStartElement() && 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, attributes().value("href").toString());
         while (!atEnd()) {
             readNext();

             if (isEndElement())
                 break;

             if (isStartElement()) {
                 if (name() == "title")
                     readTitle(bookmark);
                 else
                     readUnknownElement();
             }
         }
     }

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