saxhandler.cpp

Qt4的一些例子

#include <QtGui>

#include "saxhandler.h"

SaxHandler::SaxHandler(QTreeWidget *tree)
{
    treeWidget = tree;
    currentItem = 0;
}

bool SaxHandler::startElement(const QString & /* namespaceURI */,
                              const QString & /* localName */,
                              const QString &qName,
                              const QXmlAttributes &attributes)
{
    if (qName == "entry") {
        if (currentItem) {
            currentItem = new QTreeWidgetItem(currentItem);
        } else {
            currentItem = new QTreeWidgetItem(treeWidget);
        }
        currentItem->setText(0, attributes.value("term"));
    } else if (qName == "page") {
        currentText.clear();
    }
    return true;
}

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

bool SaxHandler::endElement(const QString & /* namespaceURI */,
                            const QString & /* localName */,
                            const QString &qName)
{
    if (qName == "entry") {
        currentItem = currentItem->parent();
    } else if (qName == "page") {
        if (currentItem) {
            QString allPages = currentItem->text(1);
            if (!allPages.isEmpty())
                allPages += ", ";
            allPages += currentText;
            currentItem->setText(1, allPages);
        }
    }
    return true;
}

bool SaxHandler::fatalError(const QXmlParseException &exception)
{
    QMessageBox::warning(0, QObject::tr("SAX Handler"),
                         QObject::tr("Parse error at line %1, column "
                                     "%2:\n%3.")
                         .arg(exception.lineNumber())
                         .arg(exception.columnNumber())
                         .arg(exception.message()));
    return false;
}