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# xbelgenerator.cpp Example File
xml/saxbookmarks/xbelgenerator.cpp

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     #include <QtGui>

     #include "xbelgenerator.h"

     XbelGenerator::XbelGenerator(QTreeWidget *treeWidget)
         : treeWidget(treeWidget)
     {
     }

     bool XbelGenerator::write(QIODevice *device)
     {
         out.setDevice(device);
         out.setCodec("UTF-8");
         out << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
             << "<!DOCTYPE xbel>\n"
             << "<xbel version=\"1.0\">\n";

         for (int i = 0; i < treeWidget->topLevelItemCount(); ++i)
             generateItem(treeWidget->topLevelItem(i), 1);

         out << "</xbel>\n";
         return true;
     }

     QString XbelGenerator::indent(int depth)
     {
         const int IndentSize = 4;
         return QString(IndentSize * depth, ' ');
     }

     QString XbelGenerator::escapedText(const QString &str)
     {
         QString result = str;
         result.replace("&", "&amp;");
         result.replace("<", "&lt;");
         result.replace(">", "&gt;");
         return result;
     }

     QString XbelGenerator::escapedAttribute(const QString &str)
     {
         QString result = escapedText(str);
         result.replace("\"", "&quot;");
         result.prepend("\"");
         result.append("\"");
         return result;
     }

     void XbelGenerator::generateItem(QTreeWidgetItem *item, int depth)
     {
         QString tagName = item->data(0, Qt::UserRole).toString();
         if (tagName == "folder") {
             bool folded = !treeWidget->isItemExpanded(item);
             out << indent(depth) << "<folder folded=\"" << (folded ? "yes" : "no")
                                  << "\">\n"
                 << indent(depth + 1) << "<title>" << escapedText(item->text(0))
                                      << "</title>\n";

             for (int i = 0; i < item->childCount(); ++i)
                 generateItem(item->child(i), depth + 1);

             out << indent(depth) << "</folder>\n";
         } else if (tagName == "bookmark") {
             out << indent(depth) << "<bookmark";
             if (!item->text(1).isEmpty())
                 out << " href=" << escapedAttribute(item->text(1));
             out << ">\n"
                 << indent(depth + 1) << "<title>" << escapedText(item->text(0))
                                      << "</title>\n"
                 << indent(depth) << "</bookmark>\n";
         } else if (tagName == "separator") {
             out << indent(depth) << "<separator/>\n";
         }
     }