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xbelreader.cpp Example File
^{xml/streambookmarks/xbelreader.cpp}

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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;
 }