Qt 5.6 | Qt XML | SAX Bookmarks Example | xbelhandler.cpp Example File

Qt 5.6.2 Reference Documentation

# xbelhandler.cpp Example File

saxbookmarks/xbelhandler.cpp

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      ** This file is part of the examples of the Qt Toolkit.
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      #include <QtWidgets>

      #include "xbelhandler.h"

      XbelHandler::XbelHandler(QTreeWidget *treeWidget)
          : treeWidget(treeWidget)
      {
          item = 0;
          metXbelTag = false;

          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 XbelHandler::startElement(const QString & /* namespaceURI */,
                                     const QString & /* localName */,
                                     const QString &qName,
                                     const QXmlAttributes &attributes)
      {
          if (!metXbelTag && qName != "xbel") {
              errorStr = QObject::tr("The file is not an XBEL file.");
              return false;
          }

          if (qName == "xbel") {
              QString version = attributes.value("version");
              if (!version.isEmpty() && version != "1.0") {
                  errorStr = QObject::tr("The file is not an XBEL version 1.0 file.");
                  return false;
              }
              metXbelTag = true;
          } else if (qName == "folder") {
              item = createChildItem(qName);
              item->setFlags(item->flags() | Qt::ItemIsEditable);
              item->setIcon(0, folderIcon);
              item->setText(0, QObject::tr("Folder"));
              bool folded = (attributes.value("folded") != "no");
              treeWidget->setItemExpanded(item, !folded);
          } else if (qName == "bookmark") {
              item = createChildItem(qName);
              item->setFlags(item->flags() | Qt::ItemIsEditable);
              item->setIcon(0, bookmarkIcon);
              item->setText(0, QObject::tr("Unknown title"));
              item->setText(1, attributes.value("href"));
          } else if (qName == "separator") {
              item = createChildItem(qName);
              item->setFlags(item->flags() & ~Qt::ItemIsSelectable);
              item->setText(0, QString(30, 0xB7));
          }

          currentText.clear();
          return true;
      }

      bool XbelHandler::endElement(const QString & /* namespaceURI */,
                                   const QString & /* localName */,
                                   const QString &qName)
      {
          if (qName == "title") {
              if (item)
                  item->setText(0, currentText);
          } else if (qName == "folder" || qName == "bookmark"
                     || qName == "separator") {
              item = item->parent();
          }
          return true;
      }

      bool XbelHandler::characters(const QString &str)
      {
          currentText += str;
          return true;
      }

      bool XbelHandler::fatalError(const QXmlParseException &exception)
      {
          QMessageBox::information(treeWidget->window(), QObject::tr("SAX Bookmarks"),
                                   QObject::tr("Parse error at line %1, column %2:\n"
                                               "%3")
                                   .arg(exception.lineNumber())
                                   .arg(exception.columnNumber())
                                   .arg(exception.message()));
          return false;
      }

      QString XbelHandler::errorString() const
      {
          return errorStr;
      }

      QTreeWidgetItem *XbelHandler::createChildItem(const QString &tagName)
      {
          QTreeWidgetItem *childItem;
          if (item) {
              childItem = new QTreeWidgetItem(item);
          } else {
              childItem = new QTreeWidgetItem(treeWidget);
          }
          childItem->setData(0, Qt::UserRole, tagName);
          return childItem;
      }