Qt 4.8: xbelhandler.cpp Example File (xml/saxbookmarks/xbelhandler.cpp)

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# xbelhandler.cpp Example File

xml/saxbookmarks/xbelhandler.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
     **     of its contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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     #include <QtGui>

     #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;
     }