Qt Reference Documentation

xbelhandler.cpp Example File

xml/saxbookmarks/xbelhandler.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:
 **
 ** "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 The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "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
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #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;
 }