Qt 4.8: xbelreader.cpp Example File (xml/streambookmarks/xbelreader.cpp)

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# xbelreader.cpp Example File

xml/streambookmarks/xbelreader.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** 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:
     **
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     ** modification, are permitted provided that the following conditions are
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     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
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     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
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     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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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)
     {
         xml.setDevice(device);

         if (xml.readNextStartElement()) {
             if (xml.name() == "xbel" && xml.attributes().value("version") == "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() == "xbel");

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

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

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

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

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

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

     void XbelReader::readBookmark(QTreeWidgetItem *item)
     {
         Q_ASSERT(xml.isStartElement() && xml.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, xml.attributes().value("href").toString());

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