xbelreader.cpp Example File

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 #include <QtWidgets>

 #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() == QLatin1String("xbel")
             && xml.attributes().value(versionAttribute()) == QLatin1String("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() == QLatin1String("xbel"));

     while (xml.readNextStartElement()) {
         if (xml.name() == QLatin1String("folder"))
             readFolder(0);
         else if (xml.name() == QLatin1String("bookmark"))
             readBookmark(0);
         else if (xml.name() == QLatin1String("separator"))
             readSeparator(0);
         else
             xml.skipCurrentElement();
     }
 }

 void XbelReader::readTitle(QTreeWidgetItem *item)
 {
     Q_ASSERT(xml.isStartElement() && xml.name() == QLatin1String("title"));

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

 void XbelReader::readSeparator(QTreeWidgetItem *item)
 {
     Q_ASSERT(xml.isStartElement() && xml.name() == QLatin1String("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() == QLatin1String("folder"));

     QTreeWidgetItem *folder = createChildItem(item);
     bool folded = (xml.attributes().value(foldedAttribute()) != QLatin1String("no"));
     treeWidget->setItemExpanded(folder, !folded);

     while (xml.readNextStartElement()) {
         if (xml.name() == QLatin1String("title"))
             readTitle(folder);
         else if (xml.name() == QLatin1String("folder"))
             readFolder(folder);
         else if (xml.name() == QLatin1String("bookmark"))
             readBookmark(folder);
         else if (xml.name() == QLatin1String("separator"))
             readSeparator(folder);
         else
             xml.skipCurrentElement();
     }
 }

 void XbelReader::readBookmark(QTreeWidgetItem *item)
 {
     Q_ASSERT(xml.isStartElement() && xml.name() == QLatin1String("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(hrefAttribute()).toString());

     while (xml.readNextStartElement()) {
         if (xml.name() == QLatin1String("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;
 }